WO2024114030A1 - 一种射频电路，射频模组及电子设备 - Google Patents

一种射频电路，射频模组及电子设备 Download PDF

Info

Publication number
WO2024114030A1
WO2024114030A1 PCT/CN2023/117815 CN2023117815W WO2024114030A1 WO 2024114030 A1 WO2024114030 A1 WO 2024114030A1 CN 2023117815 W CN2023117815 W CN 2023117815W WO 2024114030 A1 WO2024114030 A1 WO 2024114030A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal
port
antenna
filter
switch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2023/117815
Other languages
English (en)
French (fr)
Inventor
黄清华
李政
孙江涛
冯宝新
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honor Device Co Ltd
Original Assignee
Honor Device Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Honor Device Co Ltd filed Critical Honor Device Co Ltd
Priority to EP23896187.4A priority Critical patent/EP4614819A4/en
Priority to CN202380071523.2A priority patent/CN119999098A/zh
Publication of WO2024114030A1 publication Critical patent/WO2024114030A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/401—Circuits for selecting or indicating operating mode
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
    • H04B1/0053—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
    • H04B1/006—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band using switches for selecting the desired band
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
    • H04B1/0053—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
    • H04B1/0057—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band using diplexing or multiplexing filters for selecting the desired band
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0404—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas the mobile station comprising multiple antennas, e.g. to provide uplink diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0602—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using antenna switching
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
    • H04B7/0817—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with multiple receivers and antenna path selection

Definitions

  • the embodiments of the present application relate to the radio frequency field, and in particular to a radio frequency circuit, a radio frequency module and an electronic device.
  • radio frequency signals can be roughly divided into low-frequency signals, medium-frequency signals, medium-high frequency signals, high-frequency signals, etc.
  • low frequency refers to the frequency band below 960MHz, such as B8 (880MHz-960MHz), B5 (824MHz-894MHz), B28 (703MHz-803MHz), B20 (791MHz-862MHz), etc.
  • B20, B28, and B8 have the requirements of ENDC (E-UTRAN New Radio-Dual Connectivity, 4G and 5G dual connectivity) in pairs.
  • ENDC E-UTRAN New Radio-Dual Connectivity, 4G and 5G dual connectivity
  • RF circuits can usually only support one low-frequency combination ENDC.
  • the present application provides a radio frequency circuit, a radio frequency module and an electronic device, which can support at least two low-frequency combinations of ENDC without increasing the occupied space and have high practicality.
  • a radio frequency circuit comprising: a first transceiver link, a second transceiver link, a third transceiver link and a fourth receiving link.
  • the first transceiver link and the second transceiver link are both connected to the first antenna.
  • the third transceiver link and the fourth receiving link are both connected to the second antenna.
  • the first antenna and the second antenna are both low-frequency antennas.
  • the first transceiver link is used to transmit a first signal and receive a main set of the first signal through the first antenna.
  • the second transceiver link is used to transmit a third signal, receive a main set of the third signal and receive a diversity signal through the first antenna.
  • the first signal, the second signal and the third signal are all low-frequency signals.
  • the third transceiver link is used to transmit the second signal, receive a main set of the second signal and receive a diversity signal through the second antenna.
  • the fourth receiving link is used to receive a diversity signal through the second antenna.
  • the first transceiver link includes a first duplexer and a first switch.
  • the first duplexer is used to filter the uplink signal and the downlink signal of the first signal.
  • the uplink signal of the first signal refers to the signal of the uplink frequency band of the first signal
  • the downlink signal of the first signal refers to the signal of the downlink frequency band of the first signal.
  • the first duplexer is connected to the first port, the second port and the first switch respectively.
  • the first switch is connected to the first antenna.
  • the first port is the output port of the first signal
  • the second port is the main set receiving port of the first signal.
  • the uplink signal of the first signal is output by the first port, passes through the first duplexer and the first switch in sequence, and is transmitted through the first antenna. After the downlink signal of the first signal is received by the first antenna, it passes through the first switch and the first duplexer in sequence, and the main set reception is completed by the second port.
  • the first duplexer includes a first filter and a second filter.
  • a common port of the first filter and the second filter is connected to the first switch.
  • the first filter is also connected to the first port.
  • the second filter is also connected to the second port.
  • the passband of the first filter is the uplink frequency band of the first signal.
  • the passband of the second filter is the downlink frequency band of the first signal.
  • the fourth receiving link includes a third filter and a second switch.
  • the third filter is connected to the second switch and the third port respectively.
  • the second switch is connected to the second antenna.
  • the third port is a diversity receiving port for the third signal.
  • the passband of the third filter is the downlink frequency band of the third signal.
  • the second transceiver link includes a second duplexer and a first switch.
  • the second duplexer is used to filter the uplink signal of the third signal, the downlink signal of the third signal and the downlink signal of the second signal.
  • the uplink signal of the third signal refers to the signal of the uplink frequency band of the third signal
  • the downlink signal of the third signal refers to the signal of the downlink frequency band of the third signal
  • the downlink signal of the second signal refers to the signal of the downlink frequency band of the second signal.
  • the second duplexer is connected to the fourth port, the fifth port and the first switch respectively.
  • the first switch is connected to the first antenna.
  • the fourth port is the output port of the third signal
  • the fifth port is the main set receiving port of the third signal and the diversity receiving port of the second signal.
  • the second duplexer includes a fourth filter and a fifth filter.
  • the common port of the fourth filter and the fifth filter is connected to the first switch.
  • the fourth filter is also connected to the fourth port.
  • the fifth filter is also connected to the fifth port.
  • the passband of the fourth filter is the uplink frequency band of the third signal.
  • the passband of the fifth filter is the downlink frequency band of the third signal and the downlink frequency band of the second signal.
  • the downlink signal of the third signal After the downlink signal of the third signal is received by the first antenna, it passes through the first switch and the fifth filter in sequence, and the main set reception is completed by the fifth port. After the downlink signal of the second signal is received by the first antenna, it passes through the first switch and the fifth filter in sequence, and the diversity reception is completed by the fifth port.
  • the third transceiver link includes a third duplexer and a second switch.
  • the third duplexer is used to filter the uplink signal of the second signal, the downlink signal of the second signal, and the downlink signal of the third signal.
  • the uplink signal of the second signal refers to the signal of the uplink frequency band of the second signal
  • the downlink signal of the second signal refers to the signal of the downlink frequency band of the second signal
  • the downlink signal of the third signal refers to the signal of the downlink frequency band of the third signal.
  • the third duplexer is connected to the sixth port, the seventh port and the second switch respectively.
  • the second switch is connected to the second antenna.
  • the sixth port is the output port of the second signal
  • the seventh port is the main set receiving port of the second signal and the diversity receiving port of the third signal.
  • the third duplexer includes a sixth filter and a seventh filter.
  • the common port of the sixth filter and the seventh filter is connected to the second switch.
  • the sixth filter is also connected to the sixth port.
  • the seventh filter is also connected to the seventh port.
  • the passband of the sixth filter is the uplink frequency band of the second signal.
  • the passband of the seventh filter is the downlink frequency band of the second signal and the downlink frequency band of the third signal.
  • the signal After the signal is received by the second antenna, it passes through the second switch and the seventh filter in sequence, and then the main set reception is completed by the seventh port.
  • the downlink signal of the third signal After the downlink signal of the third signal is received by the second antenna, it passes through the second switch and the seventh filter in sequence, and then the diversity reception is completed by the seventh port.
  • the first transceiver link, the second transceiver link, the third transceiver link, and the fourth receiving link are all connected.
  • the second signal performs ENDC with the third signal
  • the second transceiver link and the third transceiver link are connected, and the first transceiver link and the fourth receiving link are disconnected.
  • the radio frequency module further includes: a fifth receiving link and a sixth transceiver link.
  • the fifth receiving link is connected to the first antenna.
  • the sixth transceiver link is connected to the second antenna.
  • the fifth receiving link is used for diversity reception of the fourth signal through the first antenna.
  • the sixth transceiver link is used for transmission of the fourth signal and main set reception of the fourth signal through the second antenna.
  • the fourth signal does not overlap with the third signal.
  • the fifth receiving link includes an eighth filter and a first switch.
  • the eighth filter is connected to the first switch and the eighth port respectively.
  • the first switch is also connected to the first antenna.
  • the eighth port is a diversity receiving port for the fourth signal.
  • the passband of the eighth filter is the downlink frequency band of the fourth signal.
  • the sixth transceiver link includes a fourth duplexer and a second switch.
  • the fourth duplexer is used to filter the uplink signal of the fourth signal and the downlink signal of the fourth signal.
  • the uplink signal of the fourth signal refers to the signal of the uplink frequency band of the fourth signal
  • the downlink signal of the fourth signal refers to the signal of the downlink frequency band of the fourth signal.
  • the fourth duplexer is connected to the ninth port, the tenth port and the second switch respectively.
  • the second switch is connected to the second antenna.
  • the ninth port is the output port of the fourth signal
  • the tenth port is the main set receiving port of the fourth signal.
  • the uplink signal of the fourth signal is output by the ninth port, passes through the fourth duplexer and the second switch in sequence, and is transmitted through the second antenna.
  • the downlink signal of the fourth signal is received by the second antenna, passes through the second switch and the fourth duplexer in sequence, and the main set reception is completed by the tenth port.
  • the fourth duplexer includes a ninth filter and a tenth filter.
  • the common port of the ninth filter and the tenth filter is connected to the second switch.
  • the ninth filter is also connected to the ninth port.
  • the tenth filter is also connected to the tenth port.
  • the passband of the ninth filter is the uplink frequency band of the fourth signal.
  • the passband of the tenth filter is the downlink frequency band of the fourth signal.
  • a radio frequency module in a second aspect, includes: the radio frequency circuit of any one of the first aspects, a first antenna, a second antenna, a signal output module and a signal receiving module.
  • the first transceiver link and the second transceiver link in the radio frequency circuit are both connected to the first antenna.
  • the third transceiver link and the fourth receiving link in the radio frequency circuit are both connected to the second antenna.
  • the signal output module is respectively connected to the first transceiver link, the second transceiver link and the third transceiver link.
  • the signal output module is used to output a low-frequency signal, and the low-frequency signal includes at least: a first signal, a second signal, and a third signal.
  • the signal receiving module is respectively connected to the first transceiver link, the second transceiver link, the third transceiver link and the fourth receiving link.
  • the signal receiving module is used to receive a low-frequency signal.
  • the RF module also includes a third switch.
  • the signal output module is connected to the RF circuit through the third switch.
  • the third switch is used to connect the signal output module to the first transceiver link and the third transceiver link when the first signal and the second signal perform ENDC, and disconnect the connection between the signal output module and the second transceiver link.
  • the third switch is also used to connect the signal output module to the second transceiver link and the third transceiver link when the second signal and the third signal perform ENDC, and disconnect the connection between the signal output module and the first transceiver link.
  • an electronic device comprising a radio frequency circuit as described in any one of the first aspect or a radio frequency module as described in any one of the second aspect.
  • FIG1 is a schematic diagram of a low frequency band
  • FIG2 is a schematic diagram of a radio frequency circuit
  • FIG3 is a schematic diagram of yet another radio frequency circuit
  • FIG4 is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application.
  • FIG5 is a schematic diagram of the relationship between a first signal, a second signal, and a third signal provided in an embodiment of the present application;
  • FIG6 is a schematic diagram of a radio frequency circuit provided in an embodiment of the present application.
  • FIG7 is a schematic diagram of another radio frequency circuit provided in an embodiment of the present application.
  • FIG8 is a schematic diagram of a working example of a radio frequency circuit provided in an embodiment of the present application.
  • FIG9 is a schematic diagram of the operation of another radio frequency circuit provided in an embodiment of the present application.
  • FIG10 is a schematic diagram of the operation of another radio frequency circuit provided in an embodiment of the present application.
  • FIG11 is a schematic diagram of another radio frequency circuit provided in an embodiment of the present application.
  • FIG12 is a schematic diagram of another radio frequency circuit provided in an embodiment of the present application.
  • FIG13 is a schematic diagram of the operation of another radio frequency circuit provided in an embodiment of the present application.
  • FIG14 is a schematic diagram of another radio frequency circuit provided in an embodiment of the present application.
  • FIG15 is a schematic diagram of a radio frequency module provided in an embodiment of the present application.
  • TX The full name is Transmit, which refers to the uplink frequency band of the RF signal.
  • the TX of frequency band z is called zTX.
  • frequency band z is any frequency band.
  • the TX of B28 can be called B28TX.
  • RX The full name is Receive, which refers to the downlink frequency band of the RF signal.
  • the RX of frequency band z is called zRX.
  • the RX of B28 can be called B28RX.
  • the signal of the uplink frequency band of the radio frequency signal may be referred to as the uplink signal of the radio frequency signal
  • the signal of the downlink frequency band of the radio frequency signal may be referred to as the downlink signal of the radio frequency signal.
  • B28TX may be referred to as the uplink signal of B28
  • B28RX may be referred to as the downlink signal of B28.
  • B28L Due to its wide frequency coverage, the B28 band is generally divided into two bands, L and H.
  • the lower frequency band is called B28L.
  • B28LTX that is, the uplink frequency band of B28L is 703MHz-733MHz.
  • B28LRX is 758MHz-788MHZ.
  • B28H Due to its wide frequency coverage, the B28 band is generally divided into two bands, L and H. The higher frequency band is called B28H.
  • B28HTX is 718MHz-748MHz.
  • B28HRX is 773MHz-803MHz.
  • ENDC The full name is E-UTRAN New Radio-Dual Connectivity, which refers to 4G and 5G dual connectivity.
  • the 4G frequency band starts with the letter B
  • the 5G frequency band starts with the letter N.
  • ENDC of B20+N28 means that the 4G frequency band B20 and the 5G frequency band N28 are connected and work at the same time.
  • the RF module can achieve ENDC of B20+N28, which is equivalent to ENDC of B28+N20, and will not be repeated later.
  • a filter allows specific frequency components in a signal to pass through, while greatly attenuating other frequency components.
  • the acoustic filters here may be surface acoustic waves (SAW) and bulk acoustic waves (BAW).
  • SAW surface acoustic waves
  • BAW bulk acoustic waves
  • acoustic filters have high Q values and better selectivity. They are generally used for TX+RX duplexers in the FDD (Frequency Division Duplexing) band and filters in the TDD (Time Division Duplex) band. It should be noted that there is usually a transition band between the passband and stopband of the filter.
  • the passband of a filter is B20TX, that is, 832MHz-862MHz.
  • the passband of another filter is B8TX, that is, 880MHz-915MHz.
  • the passbands of the two filters differ by 18 MHz, so they cannot be connected to the antenna switch at the same time to be turned on or off, otherwise the performance of the filter in the passband will be greatly affected.
  • Duplexer It can be seen as two transceiver filters combined, sharing a common node (antenna) for simultaneous reception and transmission of RF signals.
  • the design of the duplexer ensures that the passband of each filter does not load the other filter.
  • the transmit signal in the output of the receive filter will be significantly attenuated.
  • a well-designed duplexer has a high transmit-receive isolation. Therefore, the passbands of the two filters that make up the duplexer can be close.
  • the passband of one filter in the duplexer can be B28TX, that is, 703MHz-748MHz; the passband of the other filter can be B28RX, that is, 758MHz-803MHz.
  • the passbands of the two filters differ by 10MHz, but the duplexer can ensure that the two filters work at the same time without affecting each other.
  • Low frequency refers to the frequency below 960MHz.
  • Commonly used low frequency bands include B28, B20, B26, B5, B8, etc.
  • Figure 1 is a schematic diagram of a low frequency band.
  • B28TX is 703MHz-748MHz; B28RX is 758MHz-803MHz; B20RX is 791MHz-821MHz; B20TX is 832MHz-862MHz; B26TX is 814MHz-849MHz; B26RX is 859MHz-894MHz; B5TX is 824MHz-849MHz; B5RX is 869MHz-894MHz; B8TX is 880MHz-915MHz; B8RX is 925MHz-960MHz.
  • terminal devices As people pursue miniaturization and lightness of terminal devices, the space layout inside terminal devices is becoming more and more compact. Due to the large size of low-frequency antennas, terminal devices usually only have two. Increasing the number to three low-frequency antennas will compromise performance and sacrifice other space; increasing the number to four low-frequency antennas will further increase the difficulty of space design.
  • the radio frequency circuit transmits and receives signals through three low-frequency antennas, and can implement ENDC of B20+N28L or ENDC of B28L+N20.
  • the radio frequency circuit includes a duplexer x, a duplexer y, a filter e, and a switch i.
  • the duplexer x includes a filter a and a filter b.
  • the duplexer y includes a filter c and a filter d.
  • the duplexer x and the duplexer y are connected to the switch i respectively.
  • the switch i is also connected to the antenna f and the antenna g.
  • the filter e is connected to the antenna h.
  • Filter a is also connected to the main set receiving port of B20.
  • Filter b is also connected to the transmitting port of B20.
  • Filter c is also connected to the main set receiving port of B28L.
  • Filter d is also connected to the transmitting port of B28L.
  • Filter e is also connected to the diversity receiving port of B28L+B20.
  • the main set receiving port of B20 is used for main set reception of B20RX signal.
  • the transmitting port of B20 is used to send B20TX signal.
  • the main set receiving port of B28L is used for main set reception of B28LRX signal.
  • the transmitting port of B28L is used to send B28LTX signal.
  • the diversity receiving port of B28L+B20 is used for diversity reception of B28LRX signal and B20RX signal.
  • the passband of filter a is B20RX.
  • the passband of filter b is B20TX.
  • the passband of filter c is B28LRX.
  • the passband of filter d is B28LTX.
  • the passband of filter e is B28LRX and B20RX, so filter e is a broadband filter.
  • switch i When the RF circuit is working, switch i connects duplexer x to antenna f and duplexer y to antenna g.
  • the main set receiving path of the B20RX signal is: antenna f, switch i, filter a, and the main set receiving port of B20.
  • the diversity receiving path of the B20RX signal is: antenna h, filter e, and the diversity receiving port of B28L+B20.
  • the transmitting path of the B20TX signal is: the transmitting port of B20, filter b, switch i, and antenna f.
  • the main set receiving path of the B28LRX signal is: antenna g, switch i, filter c, and the main set receiving port of B28L.
  • the diversity receiving path of the B28LRX signal is: antenna h, filter e, and the diversity receiving port of B28L+B20.
  • the transmitting path of the B28LTX signal is: the transmitting port of B28L, filter d, switch i, and antenna g.
  • the switch i may also work in a cross state, that is, the duplexer x is connected to the antenna g, and the duplexer y is connected to the antenna f. This will not be described in detail later.
  • duplexer x and duplexer y are both turned on to achieve the transmission and main set reception of B20 and the transmission and main set reception of B28L.
  • the double opening here means that the two channels work at the same time, but are connected to different antennas, namely antenna f and antenna g.
  • a broadband filter e with a passband of B28LRX and B20RX and antenna h are used to perform diversity reception of B20 and B28L, thereby realizing ENDC of B20+N28L or ENDC of B28L+N20.
  • the RF circuit shown in FIG2 can realize ENDC of B20+N28L or ENDC of B28L+N20, it needs to introduce a new low-frequency antenna (antenna h), which will further squeeze the already tight space inside the terminal device.
  • the RF circuit shown in FIG2 only supports ENDC of B20+N28L or ENDC of B28L+N20, and cannot support ENDC between other low-frequency bands, and its function is relatively single. It is impossible to realize ENDC between other low-frequency bands using the similar principle of the RF circuit shown in FIG2, which is explained in detail below.
  • the reason why the B28LRX+B20RX filter can be used is that the frequency difference between B28LRX (758MHz-788MH) and B20RX (791MHz-821MHz) is small, and the bandwidth of 63MHz (758MHz-821MHz) is also narrow, so the filter is easier to implement.
  • B20RX+B8RX filter For example, if you want to use the principle similar to the RF circuit shown in Figure 2 to implement B8+N20 ENDC or B20+N8 ENDC, you need a B20RX+B8RX filter. However, the frequency difference between B20RX (791MHz-821MHz) and B8RX (925MHz-960MHz) is 104MHz, and the bandwidth is 169MHz, which is beyond the feasibility of the SAW filter. In other words, it is difficult to implement a filter of this specification. Therefore, it is impossible to use the principle similar to the RF circuit shown in Figure 2 to implement B8+N20 ENDC or B20+N8 ENDC through a B20RX+B8RX filter.
  • the RF circuit also cannot include a duplexer including a B8RX filter and a B8TX filter and a duplexer x that is turned on and off. This is because the difference between B8TX and B20TX is 18MHz, and turning on and off the switches will affect the in-band performance of the B8TX filter and the B20TX filter.
  • the radio frequency circuit can realize ENDC of B20+N28L or ENDC of B28L+N20 through two low-frequency antennas.
  • the RF circuit includes a triplexer w, a filter m, and a switch n.
  • the triplexer w includes a filter j, a filter k, and a filter l.
  • the triplexer w is connected to the switch n.
  • the filter j is connected to the transmitting port of B20.
  • the filter k is connected to the transmitting port of B28L.
  • the filter l is connected to the main set receiving port of B20+B28L.
  • One end of the filter m is connected to the diversity receiving port of B20+B28L, and the other end is connected to the switch n.
  • the switch n is also connected to the antenna p and the antenna q.
  • the transmission port of B20 is used to send B20TX signal.
  • the transmission port of B28L is used to send B28LTX signal.
  • the main set receiving port of B28L+B20 is used for main set reception of B28LRX signal and B20RX signal.
  • the diversity receiving port of B28L+B20 is used for diversity reception of B28LRX signal and B20RX signal.
  • the passband of filter j is B20TX.
  • the passband of filter k is B28LTX.
  • the passbands of filter l and filter m are B28LRX and B20RX.
  • switch n connects triplexer w to antenna p and filter m to antenna q.
  • the transmission path of the B20TX signal is: the transmission port of B20, filter j, switch n, antenna p.
  • the main set receiving path of the B20RX signal is: antenna p, switch n, filter l, main set receiving port of B28L+B20.
  • the transmission path of the B28LTX signal is: the transmission port of B28L, filter k, switch n, antenna p.
  • the receiving path of the B28LRX is: antenna p, switch n, filter l, main set receiving port of B28L+B20.
  • the diversity receiving path of the B20RX and the diversity receiving path of the B28LRX are both: antenna q, switch n, filter m, diversity receiving port of B28L+B20.
  • connection relationship between the triplexer w, the filter m, the antenna q, and the antenna p may also be that the switch n connects the triplexer w to the antenna q, and connects the filter m to the antenna p.
  • the RF circuit shown in FIG3 can implement ENDC of B20+N28L or ENDC of B28L+N20 through two existing low-frequency antennas in the terminal device, without introducing additional low-frequency antennas.
  • the RF circuit cannot be double-opened by adding a duplexer and triplexer including B8RX filter and B8TX filter. This is because the difference between B8TX and B20TX is 18MHz, and double-opening the switch will affect the in-band performance of B8TX filter and B20TX filter.
  • the RF circuit in the related technology can only realize ENDC of B20+N28L or B28L+N20 under the premise of using two low-frequency antennas, and cannot realize ENDC of other low-frequency bands such as B8+N20 or B20+N8.
  • the embodiments of the present application provide a radio frequency circuit, a radio frequency module and an electronic device, which can realize ENDC of at least two low-frequency combinations through two low-frequency antennas and have high practicality.
  • the RF circuit or RF module provided in the embodiments of the present application can be applied to electronic devices.
  • the electronic device can refer to a device provided with a low-frequency antenna, a RF circuit or a RF module, such as a mobile phone, a tablet computer, a wearable device (such as a smart watch), a vehicle-mounted device, a laptop computer, a desktop computer, etc.
  • Exemplary embodiments of electronic devices include but are not limited to devices equipped with Or portable terminals with other operating systems.
  • FIG. 4 is a schematic diagram of the structure of an electronic device 400 provided in an embodiment of the present application.
  • the electronic device 400 may include a processor 401 , a communication module 402 , a display screen 403 , and the like.
  • the processor 401 may include one or more processing units, for example, the processor 401 may include an application processor (AP), a modem processor, a graphics processor (GPU), an image signal processor (ISP), a controller, a memory, a video stream codec, a digital signal processor (DSP), a baseband processor, and/or a neural-network processing unit (NPU). Different processing units may be independent devices. It may also be integrated into one or more processors 401 .
  • AP application processor
  • modem processor a graphics processor
  • ISP image signal processor
  • DSP digital signal processor
  • NPU neural-network processing unit
  • Different processing units may be independent devices. It may also be integrated into one or more processors 401 .
  • the controller may be the nerve center and command center of the electronic device 400.
  • the controller may generate an operation control signal according to the instruction operation code and the timing signal to complete the control of fetching and executing instructions.
  • a memory may also be provided in the processor 401 for storing instructions and data.
  • the memory in the processor 401 is a cache memory.
  • the memory may store instructions or data that the processor 401 has just used or circulated. If the processor 401 needs to use the instruction or data again, it may be directly called from the memory. This avoids repeated access, reduces the waiting time of the processor 401, and thus improves the efficiency of the system.
  • the processor 401 may include one or more interfaces.
  • the interface may include an inter-integrated circuit (I2C) interface, an inter-integrated circuit sound (I2S) interface, a pulse code modulation (PCM) interface, a universal asynchronous receiver/transmitter (UART) interface, a mobile industry processor interface (MIPI), a general-purpose input/output (GPIO) interface, a subscriber identity module (SIM) interface, and/or a universal serial bus (USB) interface 411, etc.
  • I2C inter-integrated circuit
  • I2S inter-integrated circuit sound
  • PCM pulse code modulation
  • UART universal asynchronous receiver/transmitter
  • MIPI mobile industry processor interface
  • GPIO general-purpose input/output
  • SIM subscriber identity module
  • USB universal serial bus
  • the electronic device 400 implements the display function through a GPU, a display screen 403, and an application processor 401.
  • the GPU is a microprocessor for image processing, which connects the display screen 403 and the application processor.
  • the GPU is used to perform mathematical and geometric calculations for graphics rendering.
  • the processor 401 may include one or more GPUs, which execute program instructions to generate or change display information.
  • the display screen 403 is used to display images, video streams, etc.
  • the communication module 402 may include antenna 1, antenna 2, mobile communication module 402A, and/or wireless communication module 402B.
  • the communication module 402 includes antenna 1, antenna 2, mobile communication module 402A and wireless communication module 402B.
  • the RF circuit and RF module provided in the embodiment of the present application may also be disposed in the communication module 402 .
  • the wireless communication function of the electronic device 400 can be implemented through antenna 1, antenna 2, mobile communication module 402A, wireless communication module 402B, a modem processor, and a baseband processor.
  • Antenna 1 and antenna 2 are used to transmit and receive electromagnetic wave signals.
  • Each antenna in electronic device 400 can be used to cover a single or multiple communication frequency bands. Different antennas can also be reused to improve the utilization of antennas.
  • antenna 1 can be reused as a diversity antenna for a wireless local area network.
  • the antenna can be used in combination with a tuning switch.
  • the mobile communication module 402A can provide solutions for wireless communications including 2G/3G/4G/5G applied to the electronic device 400.
  • the mobile communication module 402A may include at least one filter, a switch, a power amplifier, a low noise amplifier (LNA), etc.
  • the mobile communication module 402A may receive electromagnetic waves from the antenna 1, and perform filtering, amplification, and other processing on the received electromagnetic waves, and transmit them to the modulation and demodulation processor for demodulation.
  • the mobile communication module 402A may also amplify the signal modulated by the modulation and demodulation processor, and convert it into electromagnetic waves for radiation through the antenna 1.
  • at least some of the functional modules of the mobile communication module 402A may be arranged in the processor 401.
  • at least some of the functional modules of the mobile communication module 402A may be arranged in the same device as at least some of the modules of the processor 401.
  • the modem processor may include a modulator and a demodulator.
  • the modulator is used to modulate the low-frequency baseband signal to be sent into a medium-high frequency signal.
  • the demodulator is used to demodulate the received electromagnetic wave signal into a low-frequency baseband signal.
  • the demodulator then transmits the demodulated low-frequency baseband signal to the baseband processor for processing.
  • the application processor outputs a sound signal through an audio device (not limited to a speaker 406A, a receiver 406B, etc.), or displays an image or video stream through a display screen 403.
  • the modem processor may be an independent device.
  • the modem processor may be independent of the processor 401 and be set in the same device as the mobile communication module 402A or other functional modules.
  • the wireless communication module 402B can provide wireless communication solutions including wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) network), bluetooth (BT), global navigation satellite system (GNSS), frequency modulation (FM), near field communication (NFC), infrared (IR) and the like applied to the electronic device 400.
  • the wireless communication module 402B can be one or more devices integrating at least one communication processing module.
  • the wireless communication module 402B receives electromagnetic waves via the antenna 2, modulates the frequency of the electromagnetic wave signal and performs filtering processing, and sends the processed signal to the processor 401.
  • the wireless communication module 402B can also receive the signal to be sent from the processor 401, modulate the frequency of the signal, amplify the signal, and convert it into electromagnetic waves for radiation through the antenna 2.
  • antenna 1 of electronic device 400 is coupled to mobile communication module 402A, and antenna 2 is coupled to wireless communication module 402B, so that electronic device 400 can communicate with a network and other devices through wireless communication technology.
  • the wireless communication technology may include global system for mobile communications (GSM), general packet radio service (GPRS), code division multiple access (CDMA), wideband code division multiple access (WCDMA), time-division code division multiple access (TD-SCDMA), long term evolution (LTE), BT, GNSS, WLAN, NFC, FM, and/or IR technology.
  • the GNSS may include a global positioning system (GPS), a global navigation satellite system (GLONASS), a Beidou navigation satellite system (BDS), a quasi-zenith satellite system (QZSS) and/or a satellite based augmentation system (SBAS).
  • GPS global positioning system
  • GLONASS global navigation satellite system
  • BDS Beidou navigation satellite system
  • QZSS quasi-zenith satellite system
  • SBAS satellite based augmentation system
  • the communication module 402 may include a radio frequency module, and the radio frequency module includes an antenna 1 and an antenna 2. That is, the antenna 1 and the antenna 2 may be low-frequency antennas.
  • the electronic device 400 may also include an external memory interface 410, an internal memory 404, a universal serial bus (USB) interface 411, a charging management module 412, a power management module 413, a battery 414, an audio module 406, a speaker 406A, a receiver 406B, a microphone 406C, an earphone interface 406D, a sensor module 405, a button 409, a motor, an indicator 408, a camera 407, and a subscriber identification module (SIM) card interface, etc.
  • USB universal serial bus
  • the charging management module 412 is used to receive charging input from a charger.
  • the charger may be a wireless charger or a wired charger.
  • the charging management module 412 may receive charging input from a wired charger through the USB interface 411.
  • the charging management module 412 may receive wireless charging input through a wireless charging coil of the electronic device 400. While the charging management module 412 is charging the battery 414, it may also power the electronic device 400 through the power management module 413.
  • the power management module 413 is used to connect the battery 414, the charging management module 412 and the processor 401.
  • the power management module 413 receives input from the battery 414 and/or the charging management module 412, and supplies power to the processor 401, the internal memory 404, the external memory, the display screen 403, the camera 407, and the wireless communication module 402B.
  • the power management module 413 can also be used to monitor parameters such as the capacity of the battery 414, the number of cycles of the battery 414, and the health status (leakage, impedance) of the battery 414.
  • the power management module 413 can also be set in the processor 401.
  • the power management module 413 and the charging management module 412 can also be set in the same device.
  • the external memory interface 410 can be used to connect an external memory card, such as a Micro SD card, to expand the storage capacity of the electronic device 400.
  • the external memory card communicates with the processor 401 through the external memory interface 410 to implement a data storage function. For example, files such as music and video streams can be saved in the external memory card.
  • the internal memory 404 may be used to store computer executable program code, which includes instructions.
  • the processor 401 executes instructions stored in the internal memory 404 to perform various functional applications and data processing of the electronic device 400 .
  • the electronic device 400 can implement audio functions such as music playing and recording through the audio module 406 , the speaker 406A, the receiver 406B, the microphone 406C, the headphone jack 406D, and the application processor 401 .
  • the key 409 includes a power key, a volume key, etc.
  • the key 409 may be a mechanical key 409 or a touch key 409.
  • the electronic device 400 may receive input from the key 409 and generate key signal input related to user settings and function control of the electronic device 400.
  • Indicator 408 may be an indicator light, which may be used to indicate charging status, power changes, messages, missed calls, notifications, etc.
  • the SIM card interface is used to connect the SIM card.
  • the SIM card can be connected to and separated from the electronic device 400 by inserting it into the SIM card interface or pulling it out from the SIM card interface.
  • the electronic device 400 can support 1 or N SIM card interfaces, where N is a positive integer greater than 1.
  • the SIM card interface can support Nano SIM card, Micro SIM card, SIM card, etc. Multiple cards can be inserted into the same SIM card interface at the same time. The types of the multiple cards can be the same or different.
  • the SIM card interface can also be compatible with different types of SIM cards.
  • the SIM card interface can also be compatible with external memory cards.
  • the electronic device 400 interacts with the network through the SIM card to realize functions such as calls and data communications.
  • the electronic device 400 uses an eSIM, i.e., an embedded SIM card.
  • the eSIM card can be embedded in the electronic device 400 and cannot be separated from the electronic device 400.
  • the sensor module 405 in the electronic device 400 may include touch sensors, pressure sensors, gyroscope sensors, air pressure sensors, magnetic sensors, acceleration sensors, distance sensors, proximity light sensors, ambient light sensors, fingerprint sensors, temperature sensors, bone conduction sensors and other components to realize the sensing and/or acquisition functions of different signals.
  • the above is an introduction to the electronic device used by the radio frequency circuit and radio frequency module provided in the embodiment of the present application. It should be understood that the structure illustrated in this embodiment does not constitute a specific limitation on the electronic device 400. In other embodiments, the electronic device 400 may include more or fewer components than shown in the figure, or combine certain components, or split certain components, or arrange the components differently. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.
  • the radio frequency circuit provided in the embodiment of the present application is described below.
  • the radio frequency circuit provided in the embodiment of the present application is used to implement ENDC of at least two low-frequency combinations through a first antenna and a second antenna, wherein the first antenna and the second antenna are both low-frequency antennas.
  • the operating frequency of the antenna is determined by its size.
  • the size of the high-frequency antenna is smaller, and the size of the low-frequency antenna is larger.
  • the embodiment of the present application provides a radio frequency circuit and a radio frequency module, which can realize ENDC with at least two low-frequency combinations through two low-frequency antennas.
  • the RF circuit provided in the embodiment of the present application can realize ENDC of the first signal and the second signal, and ENDC of the second signal and the third signal through the first antenna and the second antenna.
  • the first signal, the second signal, and the third signal are all low-frequency signals, that is, the frequencies are all less than 960 MHz.
  • the first signal, the second signal, and the third signal need to satisfy a certain relationship, which is illustrated below with reference to FIG. 5 .
  • Figure 5 is a schematic diagram of the relationship between a first signal, a second signal, and a third signal provided in an embodiment of the present application.
  • first signal does not overlap with the second signal or the third signal.
  • the distance between the uplink frequency band of the first signal and the uplink frequency band of the second signal is smaller than the distance between the uplink frequency band of the first signal and the uplink frequency band of the third signal.
  • the first signal may be greater than the second signal and the third signal as shown in Fig. 5. In other embodiments, the first signal may also be smaller than the second signal and the third signal.
  • the first signal may be a signal in the B8 frequency band
  • the second signal may be a signal in the B20 frequency band
  • the third signal may be a signal in the B28 frequency band. That is to say, the RF circuit provided in the embodiment of the present application can realize ENDC of B8+N20 (or B20+N8) and ENDC of B20+N28 (or B28+N20) through two low-frequency antennas, the first antenna and the second antenna.
  • the RF circuit provided in the embodiment of the present application can theoretically also implement B8+N28 (or B28+N8) ENDC through the first antenna and the second antenna.
  • the bandwidth of B8+N28 is 257MHz, which has very high requirements on the bandwidth of the antenna and is difficult to achieve. Therefore, the RF circuit provided in the embodiment of the present application is mainly used to implement B8+N20 (or B20+N8) ENDC and B20+N28 (or B28+N20) ENDC through the first antenna and the second antenna. If the first antenna and the second antenna meet the requirements, ENDC of B8+N28 (or B28+N8) can also be implemented.
  • first signal, the second signal, and the third signal may also be signals of other frequency bands as long as the above relationship is satisfied. This application does not make any specific limitation on this.
  • the radio frequency circuit includes: a first transceiver link 601, a second transceiver link 602, a third transceiver link 603 and a fourth receiving link 604.
  • the first transceiver link 601 and the second transceiver link 602 are both connected to the first antenna.
  • the third transceiver link 603 and the fourth receiving link 604 are both connected to the second antenna.
  • the transceiver link refers to a receiving link and a sending link.
  • the first transceiver link 601 is used to transmit the first signal through the first antenna and receive the main set of the first signal. That is, the transmission link of the first transceiver link 601 is used to transmit the first signal through the first antenna, and the reception link of the first transceiver link 601 is used to receive the main set of the first signal through the first antenna.
  • the second transceiver link 602 is used to transmit the third signal through the first antenna, receive the main set of the third signal, and receive the diversity of the second signal.
  • the transmission link of the second transceiver link 602 is used to transmit the third signal through the first antenna
  • the reception link of the second transceiver link 602 is used to receive the main set of the third signal and receive the diversity of the second signal through the first antenna.
  • the transmission of the signal and the main set reception must be completed on the same antenna. Therefore, if the third signal is transmitted through the first antenna, the main set reception must be performed through the first antenna.
  • the third transceiver link 603 is used to transmit the second signal through the second antenna, receive the main set of the second signal, and receive the diversity of the third signal. That is, the transmission link of the third transceiver link 603 is used to transmit the second signal through the second antenna, and the reception link of the third transceiver link 603 is used to receive the main set of the second signal and receive the diversity of the third signal through the second antenna.
  • the fourth receiving chain 604 is used for diversity reception of the first signal through the second antenna.
  • the radio frequency circuit includes three transceiver links and one receiving link. These three transceiver links and one receiving link can cooperate to realize the ENDC of the first signal and the second signal, and the ENDC of the second signal and the third signal, which is described in detail below.
  • the first transceiver link transmits the first signal and receives the main set of the first signal through the first antenna
  • the second transceiver link performs diversity reception of the second signal through the first antenna
  • the third transceiver link transmits the second signal and receives the main set of the second signal through the second antenna
  • the fourth receiving link performs diversity reception of the first signal through the second antenna.
  • the second transceiver link transmits the third signal through the first antenna, receives the third signal as a main set and receives the second signal as a diversity set, and the third transceiver link transmits the second signal through the second antenna. , main set reception of the second signal and diversity reception of the third signal.
  • the uplink signal frequency of the first signal and the uplink signal frequency of the second signal are relatively close, mutual interference between the two signals transmitted by the same antenna can be avoided, which is beneficial to improving the transmission efficiency of the antenna.
  • the relationship between the first signal, the second signal, and the third signal is shown in Figure 5. That is to say, the uplink frequency band of the first signal pair and the uplink frequency band of the second signal are relatively close. In this way, the uplink signal of the first signal and the uplink signal of the second signal may interfere with each other when transmitted by the same antenna, affecting the transmission efficiency.
  • the uplink signal of the first signal is transmitted by the first antenna, and the uplink signal of the second antenna is transmitted by the second antenna.
  • the two will not interfere with each other, which can reduce the risk of sensitivity degradation caused by intermodulation and reduce the risk of spurious emission.
  • the uplink signal of B8 and the uplink signal of B20 are very close, with a difference of only 18MHz, and may interfere with each other when transmitted through the same antenna.
  • the third-order intermodulation components of B20 and B8 will affect the reception of B8.
  • the B8TX signal is transmitted through the first transceiver link and the first antenna to perform the main set reception of the B8RX signal; the B20RX signal is received in diversity through the second transceiver link and the first antenna; the B20TX signal is transmitted through the third transceiver link and the second antenna to perform the main set reception of the B20RX signal; and the B8RX signal is received in diversity through the fourth receiving link.
  • mutual interference between the B8TX signal and the B20TX signal can be avoided, and ENDC of B8+N20 (or B20+N8) can be achieved.
  • the radio frequency circuit provided in the embodiment of the present application can realize at least two low-frequency combination ENDCs through two low-frequency antennas, and can effectively avoid the problem of low-frequency signal transmission signals intermodulating with each other and affecting the receiving sensitivity, and has high practicality.
  • the specific implementation of the radio frequency circuit is introduced below.
  • the transceiver link may include a duplexer, and the receiving link may include a filter.
  • the explanation of the duplexer and the filter can refer to the aforementioned concept or term explanation part, which will not be repeated here.
  • FIG. 7 is a schematic diagram of another radio frequency circuit provided in an embodiment of the present application.
  • the first transceiver link of the radio frequency circuit includes a first duplexer 701 and a first switch 702.
  • the first switch 702 is connected to the first antenna.
  • the first duplexer 701 is used to filter the uplink signal and the downlink signal of the first signal.
  • the first duplexer 701 includes a first filter 711 and a second filter 721.
  • the passband of the first filter 711 is the uplink frequency band of the first signal.
  • the passband of the second filter 721 is the downlink frequency band of the first signal.
  • the common port of the first filter 711 and the second filter 721 is connected to the first switch 702.
  • the first filter 711 is also connected to the first port 703.
  • the second filter 721 is also connected to the second port 704.
  • the first port 703 is the output port of the first signal
  • the second port 704 is the main set receiving port of the first signal.
  • the second transceiver link of the radio frequency circuit shares the first transceiver link with the first transceiver link.
  • the second transceiver link also includes a second duplexer 705.
  • the second duplexer 705 is used to filter the uplink signal of the third signal, the downlink signal of the third signal and the downlink signal of the second signal.
  • the second duplexer 705 includes a fourth filter 715 and a fifth filter 725.
  • the passband of the fourth filter 715 is the uplink frequency band of the third signal.
  • the passband of the fifth filter 725 is the downlink frequency band of the third signal and the downlink frequency band of the second signal.
  • the common port of the fourth filter 715 and the fifth filter 725 is connected to the first switch 702.
  • the fourth filter 715 is also connected to the fourth port 706.
  • the fifth filter 725 is also connected to the fifth port 707.
  • the fourth port 706 is the output port of the third signal
  • the fifth port 707 is the main set reception of the third signal and the diversity reception port of the second signal.
  • the third transceiver link of the radio frequency circuit includes a third duplexer 708 and a second switch 709.
  • the second switch 709 is connected to the second antenna.
  • the third duplexer 708 is used to filter the uplink signal of the second signal, the downlink signal of the second signal, and the downlink signal of the third signal.
  • the third duplexer 708 includes a sixth filter 718 and a seventh filter 728.
  • the passband of the sixth filter 718 is the uplink frequency band of the second signal.
  • the passband of the seventh filter 728 is the downlink frequency band of the second signal and the downlink frequency band of the third signal.
  • the common port of the sixth filter 718 and the seventh filter 728 is connected to the second switch 709.
  • the filter 718 is also connected to the sixth port 710.
  • the seventh filter 728 is also connected to the seventh port 712.
  • the sixth port 710 is an output port for the second signal
  • the seventh port 712 is a main set receiving port for the second signal and a diversity
  • the fourth receiving link of the radio frequency circuit shares the second switch 709 with the third transceiver link.
  • the fourth receiving link also includes a third filter 713.
  • the passband of the third filter 713 is the downlink frequency band of the third signal.
  • the third filter 713 is connected to the second switch 709 and the third port 714 respectively.
  • the third port 714 is a diversity receiving port for the third signal.
  • FIG8 is a schematic diagram of a radio frequency circuit provided in an embodiment of the present application.
  • the first switch 702 connects the first duplexer 701 to the first antenna and the second duplexer 705 to the first antenna.
  • the second switch 709 connects the third duplexer 708 to the second antenna and the third filter 713 to the second antenna.
  • the transmission path of the uplink signal of the first signal is: the first port 703, the first filter 711, the first switch 702, and the first antenna.
  • the main set receiving path of the downlink signal of the first signal is: the first antenna, the first switch 702, the second filter 721, and the second port 704. It can be seen that the transmission of the first signal and the main set receiving are both completed by the same antenna.
  • the diversity receiving path of the downlink signal of the first signal is: the second antenna, the second switch 709 , the third filter 713 , and the third port 714 .
  • the transmission path of the uplink signal of the second signal is: the sixth port 710, the sixth filter 718, the second switch 709, and the second antenna. That is, the transmission of the first signal and the transmission of the second signal are completed at different antennas, and will not interfere with each other, which can reduce the risk of cross-modulation and spurious.
  • the main set receiving path of the downlink signal of the second signal is: the second antenna, the second switch 709, the seventh filter 728, and the seventh port 712. It can be seen that the transmission path and the main set receiving path of the second signal are both completed on the same antenna.
  • the diversity receiving path of the downlink signal of the second signal is: the first antenna, the first switch 702 , the fifth filter 725 , and the fifth port 707 .
  • the first duplexer 701 and the second duplexer 705 can be turned on and work at the same time.
  • the third duplexer 708 and the third filter 713 can be turned on and work at the same time.
  • the first signal is a signal in the B8 frequency band and the second signal is a signal in the N20 frequency band.
  • the first signal is a signal in the N8 frequency band and the second signal is a signal in the B20 frequency band, and details are not given here.
  • the bandwidths of the first antenna and the second antenna should cover the B8 and N20 frequency bands.
  • the first port 703 is used to output the B8TX signal, and the passband of the first filter 711 is B8TX.
  • the second port 704 is used for the main set reception of the B8RX signal, and the passband of the second filter 721 is B8RX.
  • the fifth port 707 is used for the diversity reception of the N20RX signal and the main set reception of the downlink signal of the third signal, and the passband of the fifth filter 725 is the downlink frequency band of N20RX and the third signal.
  • the sixth port 710 is used to output the N20TX signal, and the passband of the sixth filter 718 is N20TX.
  • the seventh port 712 is used for the main set reception of N20RX and the diversity reception of the downlink signal of the third signal, and the passband of the seventh filter 728 is the downlink frequency band of N20RX and the third signal.
  • the third port 714 is used for the diversity reception of the B8RX signal, and the passband of the third filter 713 is B8RX.
  • the RF circuit shown in Figures 2 and 3 does not support B8+N20 ENDC is that B8TX
  • the double opening of the filter and the filter of N20TX will affect the in-band performance of the filter and affect the normal operation of the RF circuit.
  • the transceiver link of B8TX and the transceiver link of N20TX signal are connected to different antennas through different switches, that is, the transmission of B8TX signal and the transmission of N20TX signal are realized through different switches.
  • the performance optimization of N20TX can be ignored, and the RX frequency band of B8TX, B8RX and N20+ third signal downlink can be optimized, that is, the performance of the fourth filter 715 is ignored, and the performance of the first filter 711, the second filter 721, and the fifth filter 725 are optimized. Avoiding the double opening of the B8TX filter and the N20TX filter is conducive to improving the transmission efficiency of the signal.
  • Figure 9 is a schematic diagram of another working method of a radio frequency circuit provided in an embodiment of the present application.
  • the first switch 702 connects the second duplexer 705 to the first antenna.
  • the second switch 709 connects the third duplexer 708 to the second antenna.
  • the transmission path of the uplink signal of the second signal is: the sixth port 710, the sixth filter 718, the second switch 709, and the second antenna. That is, the transmission of the first signal and the transmission of the second signal are completed at different antennas, and will not interfere with each other, which is conducive to improving the transmission efficiency.
  • the main set receiving path of the downlink signal of the second signal is: the second antenna, the second switch 709, the seventh filter 728, and the seventh port 712. It can be seen that the transmission path and the main set receiving path of the second signal are both completed on the same antenna.
  • the diversity receiving path of the downlink signal of the second signal is: the first antenna, the first switch 702 , the fifth filter 725 , and the fifth port 707 .
  • the transmission path of the uplink signal of the third signal is: the fourth port 706, the fourth filter 715, the first switch 702, and the first antenna.
  • the main set receiving path of the downlink signal of the third signal is: the first antenna, the first switch 702, the fifth filter 725, and the fifth port 707. It can be seen that the transmission and the main set receiving of the third signal are both completed by the same antenna.
  • the diversity receiving path of the downlink signal of the third signal is: the second antenna, the second switch 709 , the seventh filter 728 , and the seventh port 712 .
  • the second signal is a signal in the B20 frequency band and the third signal is a signal in the N28 frequency band.
  • the second signal is a signal in the N20 frequency band and the third signal is a signal in the B28 frequency band, and details are not given here.
  • the bandwidths of the first antenna and the second antenna should cover the B20 and N28 frequency bands.
  • the fourth port 706 is used to output the N28TX signal, and the passband of the fourth filter 715 is N28TX.
  • the fifth port 707 is used to perform the main set reception of the N28RX signal and the diversity reception of the B20RX signal, and the passband of the fifth filter 725 is N28RX and B20RX.
  • the sixth port 710 is used to output the B20TX signal, and the passband of the sixth filter 718 is B20TX.
  • the seventh port 712 is used to perform the main set reception of the B20RX and the diversity reception of the N28RX, and the passband of the seventh filter 728 is B20RX and N28RX.
  • the radio frequency circuit provided in the embodiment of the present application can theoretically realize ENDC of the first signal and the third signal under the premise that the antenna meets the requirements.
  • the antenna meeting the requirements means that the bandwidth of the antenna can cover the first signal and the third signal.
  • FIG10 is a schematic diagram of another working RF circuit provided in an embodiment of the present application.
  • the first switch 702 connects the first duplexer 701 to the first antenna and the second duplexer 705 to the first antenna.
  • the second switch 709 connects the third duplexer 708 to the second antenna and the third filter 713 to the second antenna.
  • the transmission path of the uplink signal of the first signal is: the first port 703, the first filter 711, the first switch 702, the One line.
  • the main set receiving path of the downlink signal of the first signal is: the first antenna, the first switch 702, the second filter 721, and the second port 704. It can be seen that the transmission of the first signal and the main set receiving are both completed by the same antenna.
  • the diversity receiving path of the downlink signal of the first signal is: the second antenna, the second switch 709 , the third filter 713 , and the third port 714 .
  • the transmission path of the uplink signal of the third signal is: the fourth port 706, the fourth filter 715, the first switch 702, and the first antenna.
  • the main set receiving path of the downlink signal of the third signal is: the first antenna, the first switch 702, the fifth filter 725, and the fifth port 707. It can be seen that the transmission and the main set receiving of the third signal are both completed on the same antenna.
  • the diversity receiving path of the downlink signal of the third signal is: the second antenna, the second switch 709 , the seventh filter 728 , and the seventh port 712 .
  • the RF module provided in the embodiment of the present application can realize two low-frequency ENDCs is that the bandwidth of the low-frequency antenna can cover these two low-frequency bands.
  • low frequencies also include frequency bands such as B5 and B26.
  • the transceiver links of these low-frequency signals can also be set in the RF circuit provided in the embodiment of the present application, which is introduced below.
  • the low-frequency signal corresponding to the newly added transceiver link may be referred to as the fourth signal.
  • the fourth signal does not overlap with the third signal.
  • ENDC of the fourth signal and the third signal may be achieved.
  • the first signal may be a signal in the B8 frequency band
  • the second signal may be a signal in the B20 frequency band
  • the third signal may be a signal in the B28 frequency band
  • the fourth signal may be a signal in the B5 or B26 frequency band.
  • first signal, the second signal, the third signal, and the fourth signal may also be signals of other frequency bands, as long as the relationship between the aforementioned signals is satisfied, and the present application does not make any specific limitation on this.
  • FIG 11 is a schematic diagram of another radio frequency circuit provided in an embodiment of the present application.
  • the radio frequency circuit is based on the radio frequency circuit shown in Figure 6 above, and further adds a fifth receiving link 1101 and a sixth transceiver link 1102.
  • the fifth receiving link 1101 is connected to the first antenna.
  • the sixth transceiver link 1102 is connected to the second antenna.
  • the fifth receiving link 1101 is used for diversity reception of the fourth signal through the first antenna.
  • the sixth transceiver link 1102 is used for transmitting the fourth signal through the second antenna and receiving the main set of the fourth signal.
  • the second transceiver link 602 transmits the third signal and performs primary set reception of the third signal through the first antenna, and the third transceiver link 603 performs diversity reception of the third signal through the second antenna.
  • the RF circuit can also implement ENDC of the first signal and the fourth signal.
  • the RF circuit can also implement ENDC of the second signal and the fourth signal. No further details will be given here.
  • FIG. 12 is a schematic diagram of another radio frequency circuit provided in an embodiment of the present application.
  • the fifth receiving link includes an eighth filter 1201 and a first switch 702.
  • the eighth filter 1201 is connected to the first switch 702 and the eighth port 1202 respectively.
  • the passband of the eighth filter 1201 is the downlink frequency band of the fourth signal.
  • the eighth port 1202 is a diversity receiving port for the fourth signal.
  • the sixth transceiver link of the radio frequency circuit includes a fourth duplexer 1203 and a second switch 709.
  • the fourth duplexer 1203 is used to filter the uplink signal of the fourth signal and the downlink signal of the fourth signal.
  • the fourth duplexer 1203 includes a ninth filter
  • the ninth filter 1213 and the tenth filter 1223 are connected to each other.
  • the passband of the ninth filter 1213 is the uplink frequency band of the fourth signal.
  • the passband of the tenth filter 1223 is the downlink frequency band of the fourth signal.
  • the common port of the ninth filter 1213 and the tenth filter 1223 is connected to the second switch 709.
  • the ninth filter 1213 is also connected to the ninth port 1204.
  • the tenth filter 1223 is also connected to the tenth port 1205.
  • the ninth port 1204 is the output port of the fourth signal
  • the tenth port 1205 is the main set receiving port of the fourth signal.
  • Figure 13 is a schematic diagram of another working RF circuit provided in an embodiment of the present application.
  • the first switch 702 connects the second duplexer 705 and the eighth filter 1201 to the first antenna
  • the second switch 709 connects the third duplexer 708 and the fourth duplexer 1203 to the second antenna.
  • the transmission path of the uplink signal of the third signal is: the fourth port 706, the fourth filter 715, the first switch 702, and the first antenna.
  • the main set receiving path of the downlink signal of the third signal is: the first antenna, the first switch 702, the fifth filter 725, and the fifth port 707. It can be seen that the transmission and the main set receiving of the third signal are both completed on the same antenna.
  • the diversity receiving path of the downlink signal of the third signal is: the second antenna, the second switch 709 , the seventh filter 728 , and the seventh port 712 .
  • the transmission path of the uplink signal of the fourth signal is: the ninth port 1204, the ninth filter 1213, the second switch 709, and the second antenna.
  • the main set receiving path of the downlink signal of the fourth signal is: the second antenna, the second switch 709 , the tenth filter 1223 , and the tenth port 1205 .
  • the diversity receiving path of the downlink signal of the fourth signal is: the first antenna, the first switch 702 , the eighth filter 1201 , and the eighth port 1202 .
  • the third signal is a signal in the B28 frequency band
  • the fourth signal is a signal in the N5 frequency band.
  • the third signal is a signal in the N28 frequency band
  • the fourth signal is a signal in the B5 frequency band
  • the bandwidths of the first antenna and the second antenna should cover the B28 and N5 frequency bands.
  • the fourth port 706 is used to output the B28TX signal, and the passband of the fourth filter 715 is B28TX.
  • the fifth port 707 is used to perform the main set reception of the B28RX signal, and the passband of the fifth filter 725 is B28RX.
  • the seventh port 712 is used to perform the diversity reception of B28RX, and the passband of the seventh filter 728 is B28RX.
  • the ninth port 1204 is used to output the N5TX signal, and the passband of the ninth filter 1213 is N5TX.
  • the tenth port 1205 is used to perform the main set reception of the N5RX signal.
  • the passband of the tenth filter 1223 is N5RX.
  • the eighth port 1202 is used to perform the diversity reception of the N5RX signal, and the passband of the eighth filter 1201 is N5RX.
  • the fourth signal is the B26 signal or the N26 signal, and will not be further elaborated here.
  • the RF module provided in the embodiment of the present application may also include other low-frequency transceiver links.
  • connection relationship between the first switch, the second switch, the first antenna, and the second antenna may be adjustable.
  • FIG. 14 is a schematic diagram of another RF circuit provided in an embodiment of the present application.
  • the RF circuit further includes a fourth switch 1401 based on the RF circuit shown in FIG. 12.
  • the first switch 702 and the second switch 709 are both connected to the first antenna and the second antenna through the fourth switch 1401.
  • the fourth switch 1401 can connect the first switch 702 to the first antenna and the second switch 709 to the second antenna; or the first switch 702 to the second antenna and the second switch 709 to the first antenna.
  • the RF path can be easily connected to different antennas when needed, and it has good applicability.
  • the radio frequency circuit provided in the embodiment of the present application is introduced above.
  • the embodiment of the present application also provides a radio frequency module, including the radio frequency circuit introduced in any of the above embodiments, which is described in detail below.
  • the radio frequency module includes: the radio frequency circuit described in any of the above embodiments (the radio frequency circuit in Figure 15 is the radio frequency circuit shown in Figure 14), a first antenna 1501, a second antenna 1502, a signal output module 1503, a signal receiving module 1504 and a third switch 1505.
  • the signal output module 1503 is connected to the radio frequency circuit through the third switch.
  • the signal output module 1503 is respectively connected to the first port 703, the fourth port 706, the sixth port 710, and the ninth port 1204.
  • the signal output module is used to output a low-frequency signal, and the low-frequency signal includes at least: a first signal, a second signal, a third signal, and a fourth signal.
  • the signal receiving module is respectively connected to the second port 704, the fifth port 707, the seventh port 712, the third port 714, the eighth port 1202 and the tenth port 1205.
  • the signal receiving module is used to receive a low-frequency signal.
  • the signal output module 1503 may include a low frequency signal source, a power amplifier, etc. After the low frequency signal is output by the signal source, it is amplified by the corresponding power amplifier and then input to the first port 703, the fourth port 706, the sixth port 710, the ninth port 1204, etc.
  • the signal receiving module may include components such as a low noise amplifier, etc.
  • the signals received by the second port 704, the fifth port 707, the seventh port 712, the third port 714, the eighth port 1202 and the tenth port 1205 may be received after passing through the corresponding low noise amplifiers.
  • the RF module can realize at least two low-frequency combinations of ENDC, which are exemplified below.
  • the third switch 1505 can connect the signal output module 1503 to the first port 703 and the sixth port 710, and disconnect the signal output module from other ports.
  • the third switch can connect the signal output module 1503 to the fourth port 706 and the sixth port 710, and disconnect the signal output module from other ports.
  • the third switch can connect the signal output module 1503 to the fourth port 1706 and the ninth port 1204, and disconnect the signal output module from other ports.
  • the RF circuit and RF module provided in the embodiments of the present application can realize ENDC of at least two low-frequency combinations through two low-frequency antennas, and are highly practical.
  • An embodiment of the present application also provides an electronic device, which may include the radio frequency circuit or radio frequency module described in any of the above embodiments.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transceivers (AREA)

Abstract

本申请提供一种射频电路，射频模组及电子设备，涉及射频领域，能够至少支持两种低频组合的ENDC。射频电路包括：第一收发链路，第二收发链路，第三收发链路以及第四接收链路。第一收发链路和第二收发链路均与第一天线连接。第三收发链路和第四接收链路均与第二天线连接。第一天线和第二天线均为低频天线。第一收发链路用于通过第一天线进行第一信号的发射以及第一信号的主集接收。第二收发链路用于通过第一天线进行第三信号的发射，第三信号的主集接收以及第二信号的分集接收。第三收发链路用于通过第二天线进行第二信号的发射，第二信号的主集接收以及第三信号的分集接收。第四接收链路用于通过第二天线进行第一信号的分集接收。

Description

一种射频电路，射频模组及电子设备
本申请要求于2022年11月28日提交国家知识产权局、申请号为202211501785.1、发明名称为“一种射频电路，射频模组及电子设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及射频领域，尤其涉及一种射频电路，射频模组及电子设备。
背景技术
在通信领域，射频信号可以大致分为低频信号，中频信号，中高频信号，高频信号等。其中，低频是指960MHz以下的频段，如B8(880MHz-960MHz)，B5(824MHz-894MHz)，B28(703MHz-803MHz)，B20(791MHz-862MHz)等。
上述频段中，B20，B28，B8这三个频段有两两组合的ENDC(E-UTRAN New Radio-Dual Connectivity，4G和5G双连接)需求。然而相关技术中，射频电路通常只能支持一种低频组合ENDC。
因此，如何设计一种能够支持多种低频组合ENDC的射频电路，成为亟待解决的问题。
发明内容
本申请提供一种射频电路，射频模组及电子设备，在不增大占用空间的前提下，能够至少支持两种低频组合的ENDC，具有较高的实用性。
为了达到上述目的，本申请实施例采用如下技术方案。
第一方面，提供一种射频电路，包括：第一收发链路，第二收发链路，第三收发链路以及第四接收链路。第一收发链路和第二收发链路均与第一天线连接。第三收发链路和第四接收链路均与第二天线连接。第一天线和第二天线均为低频天线。第一收发链路用于通过第一天线进行第一信号的发射以及第一信号的主集接收。第二收发链路用于通过第一天线进行第三信号的发射，第三信号的主集接收以及第二信号的分集接收。第一信号，第二信号以及第三信号均为低频信号。第二信号中仅下行频段与第三信号有交叠，且交叠于第三信号的下行频段。第一信号与第二信号，第三信号均无交叠。第一信号的上行频段与第二信号的上行频段之间的距离小于第一信号的上行频段与第三信号的上行频段之间的距离。第三收发链路用于通过第二天线进行第二信号的发射，第二信号的主集接收以及第三信号的分集接收。第四接收链路用于通过第二天线进行第一信号的分集接收。
在一种可能的设计中，第一收发链路包括第一双工器以及第一开关。第一双工器用于对第一信号的上行信号和下行信号进行滤波。其中，第一信号的上行信号是指第一信号的上行频段的信号，第一信号的下行信号是指第一信号的下行频段的信号。第一双工器分别与第一端口，第二端口以及第一开关连接。第一开关与第一天线连接。其中，第一端口为第一信号的输出端口，第二端口为第一信号的主集接收端口。第一开关将第一双工器连接至第一天线时，第一信号的上行信号由第一端口输出，依次经过第一双工器，第一开关后，通过第一天线发射。第一信号的下行信号由第一天线接收后，依次经过第一开关，第一双工器后，由第二端口完成主集接收。
在一种可能的设计中，第一双工器包括第一滤波器和第二滤波器。第一滤波器和第二滤波器的公共端口与第一开关连接。第一滤波器还与第一端口连接。第二滤波器还与第二端口连接。第一滤波器的通带为第一信号的上行频段。第二滤波器的通带为第一信号的下行频段。 第一开关将第一双工器连接至第一天线时，第一信号的上行信号由第一端口输出，依次经过第一滤波器，第一开关后，通过第一天线发射。第一信号的下行信号由第一天线接收后，依次经过第一开关，第二滤波器后，由第二端口完成主集接收。
在一种可能的设计中，第四接收链路包括第三滤波器以及第二开关。第三滤波器分别与第二开关以及第三端口连接。第二开关与第二天线连接。第三端口为第三信号的分集接收端口。第三滤波器的通带为第三信号的下行频段。第二开关将第三滤波器连接至第二天线时，第三信号的下行信号由第二天线接收后，依次经过第二开关，第三滤波器后，由第三端口完成分集接收。其中，第三信号的下行信号是指第三信号的下行频带的信号。
在一种可能的设计中，第二收发链路包括第二双工器以及第一开关。第二双工器用于对第三信号的上行信号，第三信号的下行信号以及第二信号的下行信号进行滤波。其中，第三信号的上行信号是指第三信号的上行频段的信号，第三信号的下行信号是指第三信号的下行频段的信号，第二信号的下行信号是指第二信号的下行频段的信号。第二双工器分别与第四端口，第五端口以及第一开关连接。第一开关与第一天线连接。其中，第四端口为第三信号的输出端口，第五端口为第三信号的主集接收及第二信号的分集接收端口。第一开关将第二双工器连接至第一天线时，第三信号的上行信号由第四端口输出，依次经过第二双工器，第一开关后，通过第一天线发射。第三信号的下行信号由第一天线接收后，依次经过第一开关，第二双工器后，由第五端口完成主集接收。第二信号的下行信号由第一天线接收后，依次经过第一开关，第二双工器后，由第五端口完成分集接收。
在一种可能的设计中，第二双工器包括第四滤波器和第五滤波器。第四滤波器和第五滤波器的公共端口与第一开关连接。第四滤波器还与第四端口连接。第五滤波器还与第五端口连接。第四滤波器的通带为第三信号的上行频段。第五滤波器的通带为第三信号的下行频段以及第二信号的下行频段。第一开关将第二双工器连接至第一天线时，第三信号的上行信号由第四端口输出，依次经过第四滤波器，第一开关后，通过第一天线发射。第三信号的下行信号由第一天线接收后，依次经过第一开关，第五滤波器后，由第五端口完成主集接收。第二信号的下行信号由第一天线接收后，依次经过第一开关，第五滤波器后，由第五端口完成分集接收。
在一种可能的设计中，第三收发链路包括第三双工器以及第二开关。第三双工器用于对第二信号的上行信号，第二信号的下行信号以及第三信号的下行信号进行滤波。其中，第二信号的上行信号是指第二信号的上行频段的信号，第二信号的下行信号是指第二信号的下行频段的信号，第三信号的下行信号是指第三信号的下行频段的信号。第三双工器分别与第六端口，第七端口以及第二开关连接。第二开关与第二天线连接。其中，第六端口为第二信号的输出端口，第七端口为第二信号的主集接收及第三信号的分集接收端口。第二开关将第三双工器连接至第二天线时，第二信号的上行信号由第六端口输出，依次经过第三双工器，第二开关后，通过第二天线发射。第二信号的下行信号由第二天线接收后，依次经过第二开关，第三双工器后，由第七端口完成主集接收。第三信号的下行信号由第二天线接收后，依次经过第二开关，第三双工器后，由第七端口完成分集接收。
在一种可能的设计中，第三双工器包括第六滤波器和第七滤波器。第六滤波器和第七滤波器的公共端口与第二开关连接。第六滤波器还与第六端口连接。第七滤波器还与第七端口连接。第六滤波器的通带为第二信号的上行频段。第七滤波器的通带为第二信号的下行频段以及第三信号的下行频段。第二开关将第三双工器连接至第二天线时，第二信号的上行信号由第六端口输出，依次经过第六滤波器，第二开关后，通过第二天线发射。第二信号的下行 信号由第二天线接收后，依次经过第二开关，第七滤波器后，由第七端口完成主集接收。第三信号的下行信号由第二天线接收后，依次经过第二开关，第七滤波器后，由第七端口完成分集接收。
在一种可能的设计中，在第一信号与第二信号进行ENDC时，第一收发链路，第二收发链路，第三收发链路，第四接收链路均连通。在第二信号与第三信号进行ENDC时，第二收发链路和第三收发链路连通，第一收发链路和第四接收链路断开。
在一种可能的设计中，射频模组还包括；第五接收链路和第六收发链路。第五接收链路与第一天线连接。第六收发链路与第二天线连接。第五接收链路用于通过第一天线进行第四信号的分集接收。第六收发链路用于通过第二天线进行第四信号的发射以及第四信号的主集接收。第四信号与第三信号无交叠。
在一种可能的设计中，第五接收链路包括第八滤波器以及第一开关。第八滤波器分别与第一开关以及第八端口连接。第一开关还与第一天线连接。第八端口为第四信号的分集接收端口。第八滤波器的通带为第四信号的下行频段。第一开关将第八滤波器连接至第一天线时，第四信号的下行信号由第一天线接收后，依次经过第一开关，第八滤波器后，由第八端口完成分集接收。其中，第四信号的下行信号是指第四信号的下行频段的信号。
在一种可能的设计中，第六收发链路包括第四双工器以及第二开关。第四双工器用于对第四信号的上行信号以及第四信号的下行信号进行滤波。其中，第四信号的上行信号是指第四信号的上行频段的信号，第四信号的下行信号是指第四信号的下行频段的信号。第四双工器分别与第九端口，第十端口以及第二开关连接。第二开关与第二天线连接。其中，第九端口为第四信号的输出端口，第十端口为第四信号的主集接收端口。第二开关将第四双工器连接至第二天线时，第四信号的上行信号由第九端口输出，依次经过第四双工器，第二开关后，通过第二天线发射。第四信号的下行信号由第二天线接收，依次经过第二开关，第四双工器后，由第十端口完成主集接收。
在一种可能的设计中，第四双工器包括第九滤波器和第十滤波器。第九滤波器和第十滤波器的公共端口与第二开关连接。第九滤波器还与第九端口连接。第十滤波器还与第十端口连接。第九滤波器的通带为第四信号的上行频段。第十滤波器的通带为第四信号的下行频段。第二开关将第四双工器连接至第二天线时，第四信号的上行信号由第九端口输出，依次经过第九滤波器，第二开关后，通过第二天线发射。第四信号的下行信号由第二天线接收，依次经过第二开关，第十滤波器后，由第十端口完成主集接收。
第二方面，提供一种射频模组，射频模组包括：第一方面任一项的射频电路，第一天线，第二天线，信号输出模块以及信号接收模块。射频电路中的第一收发链路和第二收发链路均与第一天线连接。射频电路中的第三收发链路和第四接收链路均与第二天线连接。信号输出模块分别与第一收发链路，第二收发链路以及第三收发链路连接。信号输出模块用于输出低频信号，低频信号至少包括：第一信号，第二信号，第三信号。信号接收模块分别与第一收发链路，第二收发链路，第三收发链路以及第四接收链路连接。信号接收模块用于接收低频信号。
在一种可能的设计中，射频模组还包括第三开关。信号输出模块通过第三开关与射频电路连接。第三开关用于，在第一信号与第二信号进行ENDC时，将信号输出模块连通至第一收发链路和第三收发链路，并断开信号输出模块与第二收发链路之间的连接。第三开关还用于，在第二信号和第三信号进行ENDC时，将信号输出模块连通至第二收发链路和第三收发链路，并断开信号输出模块与第一收发链路之间的连接。
第三方面，提供一种电子设备，电子设备包括如第一方面任一项的射频电路或第二方面任一项的射频模组。
应当理解的是，上述第二方面，第三方面提供的技术方案，其技术特征均可对应到第一方面及其可能的设计中提供的射频电路，因此能够达到的有益效果类似，此处不再赘述。
附图说明
图1为一种低频频段的示意图；
图2为一种射频电路的示意图；
图3为又一种射频电路的示意图；
图4为本申请实施例提供的一种电子设备的结构示意图；
图5为本申请实施例提供的一种第一信号第二信号第三信号之间的关系示意图；
图6为本申请实施例提供的一种射频电路的示意图；
图7为本申请实施例提供的又一种射频电路的示意图；
图8为本申请实施例提供的一种射频电路的工作示意图；
图9为本申请实施例提供的又一种射频电路的工作示意图；
图10为本申请实施例提供的又一种射频电路的工作示意图；
图11为本申请实施例提供的又一种射频电路的示意图；
图12为本申请实施例提供的又一种射频电路的示意图；
图13为本申请实施例提供的又一种射频电路的工作示意图；
图14为本申请实施例提供的又一种射频电路的示意图；
图15为本申请实施例提供的一种射频模组的示意图。
具体实施方式
本申请实施例中的“第一”、“第二”和“第三”等是用于区别不同对象，而不是用于限定特定顺序。此外，“示例性的”或者“例如”等词用于表示作例子、例证或说明。本申请实施例中被描述为“示例性的”或者“例如”的任何实施例或设计方案不应被解释为比其它实施例或设计方案更优选或更具优势。确切而言，使用“示例性的”或者“例如”等词旨在以具体方式呈现相关概念。
为便于理解本申请实施例，下面对一些概念或术语进行解释。
TX：全称为Transmit，是指射频信号的上行频段。在本申请实施例中，将频段z的TX称作zTX。其中，频段z为任一频段。例如，B28的TX可以称作B28TX。
RX：全称为Receive，是指射频信号的下行频段。在本申请实施例中，将频段z的RX称作zRX。例如，B28的RX可以称作B28RX。
在本申请实施例中，可以将射频信号的上行频段的信号称作该射频信号的上行信号，将射频信号的下行频段的信号称作该射频信号的下行信号。例如，B28TX可以称作B28的上行信号，B28RX可以称作B28的下行信号。
B28L：B28频段由于频率覆盖范围较宽，一般会划分为L和H两个频段，其中频率较低的频段即称作B28L。B28LTX，即B28L的上行频段为703MHz-733MHz。B28LRX为758MHz-788MH。
B28H：B28频段由于频率覆盖范围较宽，一般会划分为L和H两个频段，其中频率较高的频段即称作B28H。B28HTX为718MHz-748MHz。B28HRX为773MHz-803MHz。
ENDC：全称E-UTRAN New Radio-Dual Connectivity，是指4G和5G双连接。其中4G频段用字母B开头，5G频段用字母N开头。例如，B20+N28的ENDC是指4G频段的B20和5G频段的N28同时连接，同时工作。
需要说明的是，4G频段和5G频段的字母之后的数字相同时，所覆盖的频率范围也是相同的。例如，B28和N28所覆盖的频率范围相同。因此，射频模组能够实现B20+N28的ENDC，等同于能实现B28+N20的ENDC，后续不再赘述。
滤波器：滤波器可以使信号中特定的频率成分通过，而极大地衰减其它频率成分。除了由电容，电感组成的滤波电路外，还有声学滤波器。这里的声学滤波器可能是声表面波(Surface Acoustic Wave，SAW)和体声波(Bulk Acoustic Wave，BAW)。相比于电容和电感组成的滤波器，声学滤波器Q值高，选择性更好，一般用于FDD(Frequency Division Duplexing，频分双工)频段的TX+RX双工器以及TDD(Time Division Duplex，频分双工)频段的滤波器。需要说明的是，滤波器的通带和阻带之间通常具有过渡带。因此，未经精心设计的两个通带靠近的滤波器不能同时连通到天线开关进行双开，否则会对带内性能造成较大的影响。例如，某一滤波器的通带为B20TX，即832MHz-862MHz。另一个滤波器的通带为B8TX，即880MHz-915MHz。两个滤波器的通带相差18MHz，因此不能同时连通到天线开关进行双开，否则会对滤波器在通带内的性能有较大的影响。
双工器：可以看成两个收发滤波器合并组成，共用一个公共节点(天线)，用于同时接收和发射射频信号。双工器的设计能够确保每个滤波器的通带不会加载另一个滤波器。另外，接收滤波器输出中的发射信号会被显著衰减。也就是说，精心设计的双工器具有较高的收发隔离度。因此，组成双工器的两个滤波器的通带可以较为接近。例如，双工器中的一个滤波器的通带可以为B28TX，即703MHz-748MHz；另一个滤波器的通带可以为B28RX，即758MHz-803MHz。两个滤波器的通带相差10MHz，但双工器中可以保证这两个滤波器同时工作也不会相互影响。
低频：低频是指960MHz以下的频率。常用的低频频段有B28，B20，B26，B5，B8等。请参考图1，为一种低频频段的示意图。如图1所示，B28TX为703MHz-748MHz；B28RX为758MHz-803MHz；B20RX为791MHz-821MHz；B20TX为832MHz-862MHz；B26TX为814MHz-849MHz；B26RX为859MHz-894MHz；B5TX为824MHz-849MHz；B5RX为869MHz-894MHz；B8TX为880MHz-915MHz；B8RX为925MHz-960MHz。
基于以上对概念或术语的解释，下面对本申请实施例的应用背景进行介绍。
随着人们对终端设备小型化和轻型化的追求，终端设备内的空间排布也越来越紧凑。低频天线由于尺寸较大，终端设备中通常只会设置2个。增加到3个低频天线就会折中性能，牺牲其它空间；再增加到4个低频天线会进一步增加空间设计的难度。
示例性地，下面介绍一种射频电路，该射频电路通过3个低频天线收发信号，可以实现B20+N28L的ENDC或B28L+N20的ENDC。
请参考图2，为一种射频电路的示意图。如图2所示，该射频电路包括双工器x，双工器y，滤波器e，开关i。双工器x中包括滤波器a和滤波器b。双工器y中包括滤波器c和滤波器d。双工器x和双工器y分别与开关i连接。开关i还与天线f以及天线g连接。滤波器e与天线h连接。
滤波器a还与B20的主集接收端口连接。滤波器b还与B20的发送端口连接。滤波器c还与B28L的主集接收端口连接。滤波器d还与B28L的发送端口连接。滤波器e还与B28L+B20的分集接收端口连接。其中，B20的主集接收端口用于进行B20RX信号的主集接收。B20的发送端口用于发送B20TX信号。B28L的主集接收端口用于进行B28LRX信号的主集接收。B28L的发送端口用于发送B28LTX信号。B28L+B20的分集接收端口用于进行B28LRX信号以及B20RX信号的分集接收。
滤波器a的通带为B20RX。滤波器b的通带为B20TX。滤波器c的通带为B28LRX。滤波器d的通带为B28LTX。滤波器e的通带为B28LRX和B20RX,因此，滤波器e为一宽带滤波器。
该射频电路工作时，开关i将双工器x连接至天线f，将双工器y连接至天线g。B20RX信号的主集接收路径为：天线f，开关i，滤波器a，B20的主集接收端口。B20RX信号的分集接收路径为：天线h，滤波器e，B28L+B20的分集接收端口。B20TX信号的发射路径为：B20的发送端口，滤波器b，开关i，天线f。B28LRX信号的主集接收路径为：天线g，开关i，滤波器c，B28L的主集接收端口。B28LRX信号的分集接收路径为：天线h，滤波器e，B28L+B20的分集接收端口。B28LTX信号的发射路径为：B28L的发送端口，滤波器d，开关i，天线g。
需要说明的是，此处双工器与天线的连接关系只是示例性说明。在一些实施例中，开关i也可以工作于交叉状态，即双工器x连接天线g，双工器y连接天线f。后续对此不再做赘述。
可以看出，图2所示的射频电路中，双工器x和双工器y双开，实现B20的发射与主集接收，B28L的发射与主集接收。需要说明的是，这里的双开，是指两路同时工作，但接不同的天线，即天线f和天线g。另外，利用B20RX与B28RX有交叠的特点，采用通带为B28LRX以及B20RX的宽带滤波器e以及天线h进行B20和B28L的分集接收，从而实现了B20+N28L的ENDC或B28L+N20的ENDC。
然而，图2所示的射频电路虽然能够实现B20+N28L的ENDC或B28L+N20的ENDC，但需要引入新的低频天线(天线h)，这会进一步挤压终端设备内部本就紧张的空间。并且，图2所示的射频电路只支持B20+N28L的ENDC或B28L+N20的ENDC，不能支持其它低频频段之间的ENDC，功能较为单一。无法利用图2所示的射频电路类似的原理实现其它低频频段之间的ENDC，下面具体说明。
图2所示的射频电路中，之所以能够使用B28LRX+B20RX的滤波器，是因为B28LRX(758MHz-788MH)与B20RX(791MHz-821MHz)的频率相差小，带宽为63MHz(758MHz-821MHz)也较窄，因此该滤波器较为容易实现。
但对于两个频率相差比较大，带宽比较宽的低频频段来说，由于SAW(Surface Acoustic Wave，声表面波滤波器)的可行性范围有限，因此难以实现满足需求的滤波器。
例如，若要利用图2所示的射频电路类似的原理实现B8+N20的ENDC或者B20+N8的ENDC，就需要B20RX+B8RX的滤波器。但B20RX(791MHz-821MHz)与B8RX(925MHz-960MHz)频率相差104MHz，带宽169MHz，超出SAW滤波器的可行性范围。也就是说，难以实现该规格的滤波器。因此，无法利用图2所示的射频电路类似的原理，通过B20RX+B8RX的滤波器实现B8+N20的ENDC或者B20+N8的ENDC。
该射频电路也无法加入包括B8RX滤波器和B8TX滤波器的双工器与双工器x双开。这是因为B8TX和B20TX相差18MHz，通过开关双开会影响B8TX滤波器和B20TX滤波器的带内性能。
为了减小射频电路的占用空间，节约终端设备内部的空间资源，相关技术中还提供了一种射频电路。该射频电路可以通过两个低频天线实现B20+N28L的ENDC或B28L+N20的ENDC。
请参考图3，为又一种射频电路的示意图。如图3所示，该射频电路包括三工器w，滤波器m，开关n。其中三工器w包括滤波器j，滤波器k以及滤波器l。三工器w与开关n连接。滤波器j与B20的发送端口连接。滤波器k与B28L的发送端口连接。滤波器l与B20+B28L的主集接收端口连接。滤波器m的一端与B20+B28L的分集接收端口连接，另一端与开关n连 接。开关n还与天线p和天线q连接。
其中，B20的发送端口用于发送B20TX信号。B28L的发送端口用于发送B28LTX信号。B28L+B20的主集接收端口用于进行B28LRX信号以及B20RX信号的主集接收。B28L+B20的分集接收端口用于进行B28LRX信号以及B20RX信号的分集接收。
滤波器j的通带为B20TX。滤波器k的通带为B28LTX。滤波器l和滤波器m的通带为B28LRX以及B20RX。
图3所示的射频电路工作时，开关n将三工器w连接至天线p，将滤波器m连接至天线q。B20TX信号的发射路径为：B20的发送端口，滤波器j，开关n，天线p。B20RX信号的主集接收路径为：天线p，开关n，滤波器l，B28L+B20的主集接收端口。B28LTX信号的发射路径为：B28L的发送端口，滤波器k，开关n，天线p。B28LRX的接收路径为：天线p，开关n，滤波器l，B28L+B20的主集接收端口。B20RX的分集接收路径以及B28LRX的分集接收路径均为：天线q，开关n，滤波器m，B28L+B20的分集接收端口。
应当理解，三工器w，滤波器m，天线q，天线p之间的连接关系也可以是，开关n将三工器w连接至天线q，将滤波器m连接至天线p。
可以看出，图3所示的射频电路中通过三工器w实现B20的发射与主集接收，B28L的发射和主集接收，且B20的发射与主集接收，B28L的发射和主集接收均由天线p完成。天线q配合另一个B20+B28L的RX滤波器(滤波器m)实现B20和B28L的分集接收。如此，即实现了B20+N28L的ENDC或B28L+N20的ENDC。
图3所示的射频电路能够通过终端设备中已有的两根低频天线实现B20+N28L的ENDC或B28L+N20的ENDC，无需引入额外的低频天线。
但是，与上述图2所示的滤波器相同的原因，由于难以实现B20RX+B8RX规格的滤波器，因此无法通过将B20RX+B28LRX的滤波器替换为B20RX+B8RX的滤波器，从而实现B20+N8的ENDC或B8+N20的ENDC。
该射频电路也无法加入包括B8RX滤波器和B8TX滤波器的双工器与三工器w双开。这是因为B8TX和B20TX相差18MHz，通过开关双开会影响B8TX滤波器和B20TX滤波器的带内性能。
也就是说，相关技术中的射频电路，在使用两根低频天线的前提下，只能实现B20+N28L或B28L+N20的ENDC，无法实现B8+N20或B20+N8等其它低频频段的ENDC。
为此，本申请实施例提供了一种射频电路，射频模组及电子设备，能够通过两根低频天线实现至少两种低频组合的ENDC，具有较高的实用性。
本申请实施例提供的射频电路或射频模组可以应用于电子设备。电子设备可以是指设置有低频天线，射频电路或射频模组的设备，诸如手机，平板电脑，可穿戴设备(如智能手表)，车载设备，膝上型计算机(Laptop)，台式计算机等。电子设备的示例性实施例包括但不限于搭载或者其它操作系统的便携式终端。
作为一种示例，请参考图4，为本申请实施例提供的一种电子设备400的结构示意图。
如图4所示，该电子设备400可以包括处理器401，通信模块402以及显示屏403等。
其中，处理器401可以包括一个或多个处理单元，例如：处理器401可以包括应用处理器(application processor，AP)，调制解调处理器，图形处理器(graphics processing unit，GPU)，图像信号处理器(image signal processor，ISP)，控制器，存储器，视频流编解码器，数字信号处理器(digital signal processor，DSP)，基带处理器，和/或神经网络处理器(neural-network processing unit，NPU)等。其中，不同的处理单元可以是独立的器件， 也可以集成在一个或多个处理器401中。
控制器可以是电子设备400的神经中枢和指挥中心。控制器可以根据指令操作码和时序信号，产生操作控制信号，完成取指令和执行指令的控制。
处理器401中还可以设置存储器，用于存储指令和数据。在一些实施例中，处理器401中的存储器为高速缓冲存储器。该存储器可以保存处理器401刚用过或循环使用的指令或数据。如果处理器401需要再次使用该指令或数据，可从所述存储器中直接调用。避免了重复存取，减少了处理器401的等待时间，因而提高了系统的效率。
在一些实施例中，处理器401可以包括一个或多个接口。接口可以包括集成电路(inter-integrated circuit，I2C)接口，集成电路内置音频(inter-integrated circuit sound，I2S)接口，脉冲编码调制(pulse code modulation，PCM)接口，通用异步收发传输器(universal asynchronous receiver/transmitter，UART)接口，移动产业处理器接口(mobile industry processor interface，MIPI)，通用输入输出(general-purpose input/output，GPIO)接口，用户标识模块(subscriber identity module，SIM)接口，和/或通用串行总线(universal serial bus，USB)接口411等。
电子设备400通过GPU，显示屏403，以及应用处理器401等实现显示功能。GPU为图像处理的微处理器，连接显示屏403和应用处理器。GPU用于执行数学和几何计算，用于图形渲染。处理器401可包括一个或多个GPU，其执行程序指令以生成或改变显示信息。
显示屏403用于显示图像，视频流等。
通信模块402可以包括天线1，天线2，移动通信模块402A，和/或无线通信模块402B。以通信模块402同时包括天线1，天线2，移动通信模块402A和无线通信模块402B为例。
另外，本申请实施例提供的射频电路以及射频模组也可以设置于通信模块402中。
电子设备400的无线通信功能可以通过天线1，天线2，移动通信模块402A，无线通信模块402B，调制解调处理器以及基带处理器等实现。
天线1和天线2用于发射和接收电磁波信号。电子设备400中的每个天线可用于覆盖单个或多个通信频带。不同的天线还可以复用，以提高天线的利用率。例如：可以将天线1复用为无线局域网的分集天线。在另外一些实施例中，天线可以和调谐开关结合使用。
移动通信模块402A可以提供应用在电子设备400上的包括2G/3G/4G/5G等无线通信的解决方案。移动通信模块402A可以包括至少一个滤波器，开关，功率放大器，低噪声放大器(low noise amplifier，LNA)等。移动通信模块402A可以由天线1接收电磁波，并对接收的电磁波进行滤波，放大等处理，传送至调制解调处理器进行解调。移动通信模块402A还可以对经调制解调处理器调制后的信号放大，经天线1转为电磁波辐射出去。在一些实施例中，移动通信模块402A的至少部分功能模块可以被设置于处理器401中。在一些实施例中，移动通信模块402A的至少部分功能模块可以与处理器401的至少部分模块被设置在同一个器件中。
调制解调处理器可以包括调制器和解调器。其中，调制器用于将待发送的低频基带信号调制成中高频信号。解调器用于将接收的电磁波信号解调为低频基带信号。随后解调器将解调得到的低频基带信号传送至基带处理器处理。低频基带信号经基带处理器处理后，被传递给应用处理器。应用处理器通过音频设备(不限于扬声器406A，受话器406B等)输出声音信号，或通过显示屏403显示图像或视频流。在一些实施例中，调制解调处理器可以是独立的器件。在另一些实施例中，调制解调处理器可以独立于处理器401，与移动通信模块402A或其他功能模块设置在同一个器件中。
无线通信模块402B可以提供应用在电子设备400上的包括无线局域网(wireless local area networks，WLAN)(如无线保真(wireless fidelity，Wi-Fi)网络)，蓝牙(bluetooth，BT)，全球导航卫星系统(global navigation satellite system，GNSS)，调频(frequency modulation，FM)，近距离无线通信技术(near field communication，NFC)，红外技术(infrared，IR)等无线通信的解决方案。无线通信模块402B可以是集成至少一个通信处理模块的一个或多个器件。无线通信模块402B经由天线2接收电磁波，将电磁波信号调频以及滤波处理，将处理后的信号发送到处理器401。无线通信模块402B还可以从处理器401接收待发送的信号，对其进行调频，放大，经天线2转为电磁波辐射出去。
在一些实施例中，电子设备400的天线1和移动通信模块402A耦合，天线2和无线通信模块402B耦合，使得电子设备400可以通过无线通信技术与网络以及其他设备通信。所述无线通信技术可以包括全球移动通讯系统(global system for mobile communications，GSM)，通用分组无线服务(general packet radio service，GPRS)，码分多址接入(code division multiple access，CDMA)，宽带码分多址(wideband code division multiple access，WCDMA)，时分码分多址(time-division code division multiple access，TD-SCDMA)，长期演进(long term evolution，LTE)，BT，GNSS，WLAN，NFC，FM，和/或IR技术等。所述GNSS可以包括全球卫星定位系统(global positioning system，GPS)，全球导航卫星系统(global navigation satellite system，GLONASS)，北斗卫星导航系统(beidou navigation satellite system，BDS)，准天顶卫星系统(quasi-zenith satellite system，QZSS)和/或星基增强系统(satellite based augmentation systems，SBAS)。
在本申请实施例中，通信模块402中可以包括射频模组，该射频模组包括天线1和天线2。也就是说，天线1和天线2可以为低频天线。
如图4所示，在一些实现方式中，该电子设备400还可以包括外部存储器接口410，内部存储器404，通用串行总线(universal serial bus，USB)接口411，充电管理模块412，电源管理模块413，电池414，音频模块406，扬声器406A，受话器406B，麦克风406C，耳机接口406D，传感器模块405，按键409，马达，指示器408，摄像头407，以及用户标识模块(subscriber identification module，SIM)卡接口等。
充电管理模块412用于从充电器接收充电输入。其中，充电器可以是无线充电器，也可以是有线充电器。在一些有线充电的实施例中，充电管理模块412可以通过USB接口411接收有线充电器的充电输入。在一些无线充电的实施例中，充电管理模块412可以通过电子设备400的无线充电线圈接收无线充电输入。充电管理模块412为电池414充电的同时，还可以通过电源管理模块413为电子设备400供电。
电源管理模块413用于连接电池414，充电管理模块412与处理器401。电源管理模块413接收电池414和/或充电管理模块412的输入，为处理器401，内部存储器404，外部存储器，显示屏403，摄像头407，和无线通信模块402B等供电。电源管理模块413还可以用于监测电池414容量，电池414循环次数，电池414健康状态(漏电，阻抗)等参数。在其他一些实施例中，电源管理模块413也可以设置于处理器401中。在另一些实施例中，电源管理模块413和充电管理模块412也可以设置于同一个器件中。
外部存储器接口410可以用于连接外部存储卡，例如Micro SD卡，实现扩展电子设备400的存储能力。外部存储卡通过外部存储器接口410与处理器401通信，实现数据存储功能。例如将音乐，视频流等文件保存在外部存储卡中。
内部存储器404可以用于存储计算机可执行程序代码，所述可执行程序代码包括指令。 处理器401通过运行存储在内部存储器404的指令，从而执行电子设备400的各种功能应用以及数据处理。
电子设备400可以通过音频模块406，扬声器406A，受话器406B，麦克风406C，耳机接口406D，以及应用处理器401等实现音频功能。例如音乐播放，录音等。
按键409包括开机键，音量键等。按键409可以是机械按键409。也可以是触摸式按键409。电子设备400可以接收按键409输入，产生与电子设备400的用户设置以及功能控制有关的键信号输入。
指示器408可以是指示灯，可以用于指示充电状态，电量变化，也可以用于指示消息，未接来电，通知等。
SIM卡接口用于连接SIM卡。SIM卡可以通过插入SIM卡接口，或从SIM卡接口拔出，实现和电子设备400的接触和分离。电子设备400可以支持1个或N个SIM卡接口，N为大于1的正整数。SIM卡接口可以支持Nano SIM卡，Micro SIM卡，SIM卡等。同一个SIM卡接口可以同时插入多张卡。所述多张卡的类型可以相同，也可以不同。SIM卡接口也可以兼容不同类型的SIM卡。SIM卡接口也可以兼容外部存储卡。电子设备400通过SIM卡和网络交互，实现通话以及数据通信等功能。在一些实施例中，电子设备400采用eSIM，即：嵌入式SIM卡。eSIM卡可以嵌在电子设备400中，不能和电子设备400分离。
电子设备400中的传感器模块405可以包括触摸传感器、压力传感器、陀螺仪传感器、气压传感器、磁传感器、加速度传感器、距离传感器、接近光传感器、环境光传感器、指纹传感器、温度传感器、骨传导传感器等部件，以实现对于不同信号的感应和/或获取功能。
以上对本申请实施例提供的射频电路，射频模组所应用的电子设备进行了介绍。应当理解，本实施例示意的结构并不构成对电子设备400的具体限定。在另一些实施例中，电子设备400可以包括比图示更多或更少的部件，或者组合某些部件，或者拆分某些部件，或者不同的部件布置。图示的部件可以以硬件，软件或软件和硬件的组合实现。
下面对本申请实施例提供的射频电路进行说明。
本申请实施例提供的射频电路，用于通过第一天线和第二天线实现至少两种低频组合的ENDC。其中，第一天线和第二天线均为低频天线。
应当理解，天线的工作频率由其尺寸决定。高频天线的尺寸较小，低频天线的尺寸较大。对于终端设备来说，其内部空间有限，一般最多只允许设置两个低频天线。本申请实施例即在这一限定下，提供了一种射频电路和射频模组，能够通过两个低频天线实现至少两种低频组合的ENDC。
示例性地，本申请实施例提供的射频电路可以通过第一天线和第二天线实现第一信号和第二信号的ENDC，以及第二信号与第三信号的ENDC。其中，第一信号，第二信号，第三信号均为低频信号，即频率均小于960MHz。
在本申请实施例中，第一信号，第二信号，第三信号之间需要满足一定的关系，下面通过图5来说明。
请参考图5，为本申请实施例提供的一种第一信号，第二信号，第三信号之间的关系示意图。如图5所示，第二信号中仅下行频段与第三信号有交叠，且交叠于第三信号的下行频段。第一信号与第二信号，第三信号均无交叠。第一信号的上行频段与第二信号的上行频段之间的距离小于第一信号的上行频段与第三信号的上行频段之间的距离。
在一些实施例中，第一信号可以如图5所示，大于第二信号和第三信号。在另一些实施例中，第一信号也可以小于第二信号和第三信号。
作为一种示例，第一信号可以为B8频段的信号，第二信号可以为B20频段的信号，第三信号均可以为B28频段的信号。也就是说，本申请实施例提供的射频电路可以通过第一天线和第二天线两个低频天线实现B8+N20(或B20+N8)的ENDC，以及B20+N28(或B28+N20)的ENDC。
需要说明的是，本申请实施例提供的射频电路理论上也可以通过第一天线和第二天线实现B8+N28(或B28+N8)的ENDC。但在实际应用中，B8+N28的带宽为257MHz，这一带宽对天线的带宽要求非常高，难以实现。因此，本申请实施例提供的射频电路主要用于通过第一天线和第二天线实现B8+N20(或B20+N8)的ENDC以及B20+N28(或B28+N20)的ENDC。在第一天线和第二天线满足要求的情况下，也可以实现B8+N28(或B28+N8)的ENDC。
应当理解，此处只是示例性说明，第一信号，第二信号，第三信号也可以为其它频段的信号，只需满足上述关系即可，本申请对此不做具体限定。
基于以上对第一信号，第二信号，第三信号，第一天线以及第二天线的介绍，对本申请实施例提供的射频电路的结构以及工作原理进行具体说明。
请参考图6，为本申请实施例提供的一种射频电路的示意图。如图6所示，该射频电路包括：第一收发链路601，第二收发链路602，第三收发链路603以及第四接收链路604。第一收发链路601和第二收发链路602均与第一天线连接。第三收发链路603和第四接收链路604均与第二天线连接。
在本申请实施例中，收发链路是指接收链路和发送链路。
第一收发链路601用于通过第一天线进行第一信号的发射以及第一信号的主集接收。也就是说，第一收发链路601的发送链路用于通过第一天线进行第一信号的发射，第一收发链路601的接收链路用于通过第一天线进行第一信号的主集接收。
第二收发链路602用于通过第一天线进行第三信号的发射，第三信号的主集接收以及第二信号的分集接收。也就是说，第二收发链路602的发送链路用于通过第一天线进行第三信号的发射，第二收发链路602的接收链路用于通过第一天线进行第三信号的主集接收以及第二信号的分集接收。
需要说明的是，在射频领域，信号的发射和主集接收必须在同一天线上完成。因此，第三信号通过第一天线发射，则必须通过第一天线进行主集接收。
第三收发链路603用于通过第二天线进行第二信号的发射，第二信号的主集接收以及第三信号的分集接收。也就是说，第三收发链路603的发送链路用于通过第二天线进行第二信号的发射，第三收发链路603的接收链路用于通过第二天线进行第二信号的主集接收以及第三信号的分集接收。
第四接收链路604用于通过第二天线进行第一信号的分集接收。
以上即为本申请实施例提供的射频电路的结构。可以看出，该射频电路包括三个收发链路以及一个接收链路。这三个收发链路和一个接收链路配合即可实现第一信号和第二信号的ENDC，以及第二信号和第三信号的ENDC，下面具体说明。
第一信号和第二信号进行ENDC时，第一收发链路通过第一天线进行第一信号的发射和第一信号的主集接收，第二收发链路通过第一天线进行第二信号的分集接收，第三收发链路通过第二天线进行第二信号的发射和第二信号的主集接收，第四接收链路通过第二天线进行第一信号的分集接收。
第二信号和第三信号进行ENDC时，第二收发链路通过第一天线进行第三信号的发射，第三信号的主集接收以及第二信号的分集接收，第三收发链路通过第二天线进行第二信号的发 射，第二信号的主集接收以及第三信号的分集接收。
另外，本申请实施例提供的射频电路，第一信号的上行信号和第二信号的上行信号频率较为接近时，可以避免两者同一天线发射相互干扰，有利于提高天线的发射效率。示例性地，第一信号，第二信号，第三信号的关系如图5所示。也就是说，第一信号对的上行频段和第二信号的上行频段比较接近。如此，第一信号的上行信号和第二信号的上行信号在同一天线进行发射可能会相互干扰，影响发射效率。因此，在本申请实施例中，第一信号和第二信号进行ENDC时，第一信号的上行信号由第一天线发射，第二天线的上行信号由第二天线发射，两者不会相互干扰，能够降低交调导致灵敏度退化风险，降低发射杂散风险。
以第一信号为B8频段的信号，第二信号为B20频段的信号为例。在B8+N20(或B20+N8)进行ENDC时，B8的上行信号与B20的上行信号由于非常接近，仅相差18MHz，通过同一天线发射可能会相互干扰。例如，B20和B8的三阶交调分量会影响B8的接收。因此在本申请实施例中，通过第一收发链路和第一天线发射B8TX信号，进行B8RX信号的主集接收；通过第二收发链路和第一天线进行B20RX信号的分集接收；通过第三收发链路和第二天线发射B20TX信号，进行B20RX信号的主集接收；通过第四接收链路进行B8RX信号的分集接收。如此即可避免B8TX信号与B20TX信号相互干扰，实现B8+N20(或B20+N8)的ENDC。
基于以上说明可以看出，本申请实施例提供的射频电路，能够通过两根低频天线，至少实现两种低频组合的ENDC，且能够有效避免低频信号的发射信号相互交调影响接收灵敏度问题，具有很高的实用性。下面对射频电路的具体实现进行介绍。
在本申请实施例中，收发链路可以包括双工器，接收链路可以包括滤波器。其中，对双工器和滤波器的解释可以参见前述概念或术语解释部分，此处不再赘述。
请参考图7，为本申请实施例提供的又一种射频电路的示意图。
如图7所示，该射频电路的第一收发链路包括第一双工器701以及第一开关702。第一开关702与第一天线连接。第一双工器701用于对第一信号的上行信号和下行信号进行滤波。第一双工器701包括第一滤波器711和第二滤波器721。第一滤波器711的通带为第一信号的上行频段。第二滤波器721的通带为第一信号的下行频段。第一滤波器711和第二滤波器721的公共端口与第一开关702连接。第一滤波器711还与第一端口703连接。第二滤波器721还与第二端口704连接。其中，第一端口703为第一信号的输出端口，第二端口704为第一信号的主集接收端口。
该射频电路的第二收发链路与上述第一收发链路共用第一开关702。第二收发链路还包括第二双工器705。第二双工器705用于对第三信号的上行信号，第三信号的下行信号以及第二信号的下行信号进行滤波。第二双工器705包括第四滤波器715和第五滤波器725。第四滤波器715的通带为第三信号的上行频段。第五滤波器725的通带为第三信号的下行频段以及第二信号的下行频段。第四滤波器715和第五滤波器725的公共端口与第一开关702连接。第四滤波器715还与第四端口706连接。第五滤波器725还与第五端口707连接。其中，第四端口706为第三信号的输出端口，第五端口707为第三信号的主集接收及第二信号的分集接收端口。
该射频电路的第三收发链路包括第三双工器708和第二开关709。第二开关709与第二天线连接。第三双工器708用于对第二信号的上行信号，第二信号的下行信号以及第三信号的下行信号进行滤波。第三双工器708包括第六滤波器718和第七滤波器728。第六滤波器718的通带为第二信号的上行频段。第七滤波器728的通带为第二信号的下行频段以及第三信号的下行频段。第六滤波器718和第七滤波器728的公共端口与第二开关709连接。第六 滤波器718还与第六端口710连接。第七滤波器728还与第七端口712连接。其中，第六端口710为第二信号的输出端口，第七端口712为第二信号的主集接收及第三信号的分集接收端口。
该射频电路的第四接收链路与上述第三收发链路共用第二开关709。第四接收链路还包括第三滤波器713。第三滤波器713的通带为第三信号的下行频段。第三滤波器713分别与第二开关709以及第三端口714连接。其中，第三端口714为第三信号的分集接收端口。
以上即为本申请实施例提供的射频电路的一种具体结构。下面基于上述对电路结构的介绍，对该电路的工作原理进行说明。
首先介绍第一信号和第二信号进行ENDC时，该电路的工作原理。
请参考图8，为本申请实施例提供的一种射频电路的工作示意图。如图8所示，在第一信号和第二信号进行ENDC时，第一开关702将第一双工器701连接至第一天线，将第二双工器705连接至第一天线。第二开关709将第三双工器708连接至第二天线，将第三滤波器713连接至第二天线。
第一信号的上行信号的发射路径为：第一端口703，第一滤波器711，第一开关702，第一天线。
第一信号的下行信号的主集接收路径为：第一天线，第一开关702，第二滤波器721，第二端口704。可以看出，第一信号的发射和主集接收均在同一天线完成。
第一信号的下行信号的分集接收路径为：第二天线，第二开关709，第三滤波器713，第三端口714。
第二信号的上行信号的发射路径为：第六端口710，第六滤波器718，第二开关709，第二天线。也就是说，第一信号的发射和第二信号的发射在不同的天线完成，不会互相干扰，能够降低交调和杂散风险。
第二信号的下行信号的主集接收路径为：第二天线，第二开关709，第七滤波器728，第七端口712。可以看出，第二信号的发射路径和主集接收路径均在同一天线完成。
第二信号的下行信号的分集接收路径为：第一天线，第一开关702，第五滤波器725，第五端口707。
在第一开关702，第一双工器701和第二双工器705可以双开，同时工作。在第二开关709，第三双工器708与第三滤波器713可以双开，同时工作。
如此，即实现了第一信号和第二信号的ENDC。
以第一信号为B8频段的信号，第二信号为N20频段的信号为例再次进行说明，第一信号为N8频段的信号，第二信号为B20频段的信号时同理，此处不做赘述。
在第一信号为B8频段的信号，第二信号为N20频段的信号时，第一天线和第二天线的带宽应当覆盖B8和N20频段。
第一端口703用于输出B8TX信号，第一滤波器711的通带为B8TX。第二端口704用于进行B8RX信号的主集接收，第二滤波器721的通带为B8RX。第五端口707用于进行N20RX信号的分集接收和第三信号的下行信号的主集接收，第五滤波器725的通带为N20RX和第三信号的下行频段。第六端口710用于输出N20TX信号，第六滤波器718的通带为N20TX。第七端口712用于进行N20RX的主集接收以及第三信号的下行信号的分集接收，第七滤波器728的通带为N20RX和第三信号的下行频段。第三端口714用于进行B8RX信号的分集接收，第三滤波器713的通带为B8RX。
前述图2和图3所示的射频电路之所以不支持B8+N20的ENDC，一个重要的原因就是B8TX 的滤波器与N20TX的滤波器双开会影响滤波器的带内性能，影响射频电路的正常工作。本申请实施例提供的射频模组中，将B8TX的收发链路和N20TX信号的收发链路通过不同的开关连接至不同的天线，即通过不同的开关实现B8TX信号的发射和N20TX信号的发射，除了前述的避免TX信号干扰导致的交调和杂散风险，同时，双开情况下，可以忽略N20TX性能优化，重点优化B8TX，B8RX和N20+第三信号下行的RX频段，即忽略第四滤波器715的性能，重点优化第一滤波器711，第二滤波器721，第五滤波器725的性能。避免了B8TX滤波器和N20TX滤波器的双开，有利于提高信号的发射效率。
下面介绍第二信号和第三信号进行ENDC时，该电路的工作原理。
请参考图9，为本申请实施例提供的又一种射频电路的工作示意图。如图9所示，在第二信号和第三信号进行ENDC时，第一开关702将第二双工器705连接至第一天线。第二开关709将第三双工器708连接至第二天线。
第二信号的上行信号的发射路径为：第六端口710，第六滤波器718，第二开关709，第二天线。也就是说，第一信号的发射和第二信号的发射在不同的天线完成，不会互相干扰，有利于提高发射效率。
第二信号的下行信号的主集接收路径为：第二天线，第二开关709，第七滤波器728，第七端口712。可以看出，第二信号的发射路径和主集接收路径均在同一天线完成。
第二信号的下行信号的分集接收路径为：第一天线，第一开关702，第五滤波器725，第五端口707。
第三信号的上行信号的发射路径为：第四端口706，第四滤波器715，第一开关702，第一天线。
第三信号的下行信号的主集接收路径为：第一天线，第一开关702，第五滤波器725，第五端口707。可以看出，第三信号的发射和主集接收均在同一天线完成。
第三信号的下行信号的分集接收路径为：第二天线，第二开关709，第七滤波器728，第七端口712。
如此，即实现了第二信号和第三信号的ENDC。
以第二信号为B20频段的信号，第三信号为N28频段的信号为例再次进行说明，第二信号为N20频段的信号，第三信号为B28频段的信号时同理，此处不做赘述。
在第二信号为B20频段的信号，第三信号为N28频段的信号时，第一天线和第二天线的带宽应当覆盖B20和N28频段。
第四端口706用于输出N28TX信号，第四滤波器715的通带为N28TX。第五端口707用于进行N28RX信号的主集接收和B20RX信号的分集接收，第五滤波器725的通带为N28RX和B20RX。第六端口710用于输出B20TX信号，第六滤波器718的通带为B20TX。第七端口712用于进行B20RX的主集接收以及N28RX的分集接收，第七滤波器728的通带为B20RX和N28RX。
本申请实施例提供的射频电路在天线满足要求的前提下，理论上也可以实现第一信号和第三信号的ENDC。天线满足要求是指，天线的带宽能够覆盖第一信号和第三信号。
下面介绍第一信号和第三信号进行ENDC时，该电路的工作原理。
请参考图10，为本申请实施例提供的又一种射频电路的工作示意图。如图10所示，在第一信号和第三信号进行ENDC时，第一开关702讲第一双工器701连接至第一天线，将第二双工器705连接至第一天线。第二开关709将第三双工器708连接至第二天线，将第三滤波器713连接至第二天线。
第一信号的上行信号的发射路径为：第一端口703，第一滤波器711，第一开关702，第 一天线。
第一信号的下行信号的主集接收路径为：第一天线，第一开关702，第二滤波器721，第二端口704。可以看出，第一信号的发射和主集接收均在同一天线完成。
第一信号的下行信号的分集接收路径为：第二天线，第二开关709，第三滤波器713，第三端口714。
第三信号的上行信号的发射路径为：第四端口706，第四滤波器715，第一开关702，第一天线。
第三信号的下行信号的主集接收路径为：第一天线，第一开关702，第五滤波器725，第五端口707。可以看出，第三信号的发射和主集接收均在同一天线完成。
第三信号的下行信号的分集接收路径为：第二天线，第二开关709，第七滤波器728，第七端口712。
如此，即实现了第一信号和第三信号的ENDC。
此处再次说明，本申请实施例提供的射频模组能够实现两种低频的ENDC的前提是，低频天线的带宽能够覆盖这两种低频频段。
以上即为本申请实施例提供的射频电路通过两根低频天线实现至少两种低频组合ENDC的工作原理。在实际应用中，低频还包括B5，B26等频段，在满足一定条件的前提下，这些低频信号的收发链路也可以设置于本申请实施例提供的射频电路中，下面进行介绍。
在本申请实施例中，可以将新增加的收发链路对应的低频信号称作第四信号。第四信号与第三信号无交叠。如此，可以实现第四信号与第三信号的ENDC。示例性地，第一信号可以为B8频段的信号，第二信号可以为B20频段的信号，第三信号可以为B28频段的信号，第四信号可以为B5或B26频段的信号。
应当理解，这里只是示例性说明，第一信号，第二信号，第三信号，第四信号也可以为其它频段的信号，只要满足前述各信号之间的关系即可，本申请对此并不做具体限定。
请参考图11，为本申请实施例提供的又一种射频电路的示意图。如图11所示，该射频电路在上述图6所示的射频电路的基础上，还增加了第五接收链路1101和第六收发链路1102。第五接收链路1101与第一天线连接。第六收发链路1102与第二天线连接。第五接收链路1101用于通过第一天线进行第四信号的分集接收。第六收发链路1102用于通过第二天线进行第四信号的发射以及第四信号的主集接收。
第三信号和第四信号进行ENDC时，第二收发链路602通过第一天线进行第三信号的发射和第三信号的主集接收。第三收发链路603通过第二天线进行第三信号的分集接收。
应当理解，在第四信号与第一信号无交叠，且第一天线和第二天线的带宽能够覆盖第一信号和第四信号时，该射频电路也可以实现第一信号和第四信号的ENDC。在第四信号和第二信号无交叠，且第一天线和第二天线的带宽能够覆盖第二信号和第四信号时，该射频电路也可以实现第二信号和第四信号的ENDC。在此不做赘述。
下面介绍一种上述图11所示的射频电路的具体实现。
请参考图12，为本申请实施例提供的又一种射频电路的示意图。如图12所示，第五接收链路包括第八滤波器1201以及第一开关702。第八滤波器1201分别与第一开关702以及第八端口1202连接。第八滤波器1201的通带为第四信号的下行频段。第八端口1202为第四信号的分集接收端口。
该射频电路的第六收发链路包括第四双工器1203以及第二开关709。第四双工器1203用于对第四信号的上行信号以及第四信号的下行信号进行滤波。第四双工器1203包括第九滤 波器1213和第十滤波器1223。第九滤波器1213的通带为第四信号的上行频段。第十滤波器1223的通带为第四信号的下行频段。第九滤波器1213和第十滤波器1223的公共端口与第二开关709连接。第九滤波器1213还与第九端口1204连接。第十滤波器1223还与第十端口1205连接。其中，第九端口1204为第四信号的输出端口，第十端口1205为第四信号的主集接收端口。
请参考图13，为本申请实施例提供的又一种射频电路的工作示意图。如图13所示，在第三信号和第四信号进行ENDC时，第一开关702将第二双工器705以及第八滤波器1201连接至第一天线，第二开关709将第三双工器708以及第四双工器1203连接至第二天线。
第三信号的上行信号的发射路径为：第四端口706，第四滤波器715，第一开关702，第一天线。
第三信号的下行信号的主集接收路径为：第一天线，第一开关702，第五滤波器725，第五端口707。可以看出，第三信号的发射和主集接收均在同一天线完成。
第三信号的下行信号的分集接收路径为：第二天线，第二开关709，第七滤波器728，第七端口712。
第四信号的上行信号的发射路径为：第九端口1204，第九滤波器1213，第二开关709，第二天线。
第四信号的下行信号的主集接收路径为：第二天线，第二开关709，第十滤波器1223，第十端口1205。
第四信号的下行信号的分集接收路径为：第一天线，第一开关702，第八滤波器1201，第八端口1202。
如此，即可实现第三信号和第四信号的ENDC。
以第三信号为B28频段的信号，第四信号为N5频段的信号为例再次进行说明。第三信号为N28频段的信号，第四信号为B5频段的信号时同理，在此不做赘述。
在第三信号为B28频段的信号，第四信号为N5频段的信号时，第一天线和第二天线的带宽应当覆盖B28和N5频段。
第四端口706用于输出B28TX信号，第四滤波器715的通带为B28TX。第五端口707用于进行B28RX信号的主集接收，第五滤波器725的通带为B28RX。第七端口712用于进行B28RX的分集接收，第七滤波器728的通带为B28RX。第九端口1204用于输出N5TX信号，第九滤波器1213的通带为N5TX。第十端口1205用于进行N5RX信号的主集接收。第十滤波器1223的通带为N5RX。第八端口1202用于进行N5RX信号的分集接收，第八滤波器1201的通带为N5RX。
第四信号为B26信号或N26信号时同理，此处不再做赘述。
需要说明的是，本申请实施例提供的射频模组中还可以包括其他低频收发链路。换句话说，上述第五接收链路和第六收发链路可以有多个，分别对应不同低频的收发链路，从而使本申请实施例提供的射频电路支持多种低频组合的ENDC。
另外，在一些可能的设计中，第一开关，第二开关，第一天线，第二天线之间的连接关系可以是可调的。请参考图14，为本申请实施例提供的又一种射频电路的示意图。如图14所示，该射频电路在图12所示的射频电路的基础上，还包括第四开关1401。第一开关702，第二开关709均通过该第四开关1401与第一天线和第二天线连接。
该第四开关1401可以将第一开关702连通至第一天线，将第二开关709连通至第二天线；也可以将第一开关702连通至第二天线，将第二开关709连通至第一天线。如此，可以 在需要的时候便捷地将射频通路连通至不同的天线，适用性较好。
以上对本申请实施例提供的射频电路进行了介绍。本申请实施例还提供了一种射频模组，包括以上任一项实施例所介绍的射频电路，下面进行具体说明。
请参考图15，为本申请实施例提供的一种射频模组的示意图。如图15所示，该射频模组包括：以上任一项实施例所述的射频电路(图15中的射频电路为图14所示的射频电路)，第一天线1501，第二天线1502，信号输出模块1503，信号接收模块1504以及第三开关1505。信号输出模块1503通过第三开关与射频电路连接。信号输出模块1503分别与第一端口703，第四端口706，第六端口710，第九端口1204连接。信号输出模块用于输出低频信号，低频信号至少包括：第一信号，第二信号，第三信号，第四信号。信号接收模块分别与第二端口704，第五端口707，第七端口712，第三端口714，第八端口1202以及第十端口1205连接。信号接收模块用于接收低频信号。
信号输出模块1503中可以包括低频信号源，功率放大器等部件。低频信号由信号源输出后，经对应的功率放大器放大后输入第一端口703，第四端口706，第六端口710，第九端口1204等。
信号接收模块可以包括低噪声放大器等部件。第二端口704，第五端口707，第七端口712，第三端口714，第八端口1202以及第十端口1205等接收到信号可以经对应的低噪声放大器后被接收。
该射频模组可以实现至少两种低频组合的ENDC，下面示例性说明。
在第一信号与第二信号进行ENDC时，第三开关1505可以将信号输出模块1503连通至第一端口703，第六端口710，并断开信号输出模块与其它端口之间的连接。
在第二信号和第三信号进行ENDC时，第三开关可以将信号输出模块1503连通至第四端口706，第六端口710，并断开信号输出模块与其它端口之间的连接。
在第三信号和第四信号进行ENDC时，第三开关可以将信号输出模块1503连接至第四端口欧706，第九端口1204，并断开信号输出模块与其它端口之间的连接。
其它组合的ENDC与之类似，在此不做赘述。
基于以上介绍可以理解，本申请实施例提供的射频电路和射频模组，能够通过两根低频天线实现至少两种低频组合的ENDC，具有很高的实用性。
本申请实施例还提供的一种电子设备，该电子设备可以包括以上任一实施例所描述的射频电路或射频模组。
以上结合具体特征及其实施例对本申请提供的射频电路，射频模组进行了描述，显而易见的，在不脱离本申请的精神和范围的情况下，还可对上述特征进行各种修改和组合。相应地，本说明书和附图仅仅是所附权利要求所界定的本申请的示例性说明，且视为已覆盖本申请范围内的任意和所有修改、变化、组合或等同物。显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包括这些改动和变型在内。

Claims (16)

  1. 一种射频电路，其特征在于，包括：第一收发链路，第二收发链路，第三收发链路以及第四接收链路；
    所述第一收发链路和所述第二收发链路均与第一天线连接；所述第三收发链路和所述第四接收链路均与第二天线连接；所述第一天线和所述第二天线均为低频天线；
    所述第一收发链路用于通过所述第一天线进行第一信号的发射以及所述第一信号的主集接收；所述第二收发链路用于通过所述第一天线进行第三信号的发射，所述第三信号的主集接收以及第二信号的分集接收；所述第一信号，所述第二信号以及所述第三信号均为低频信号；所述第二信号中仅下行频段与所述第三信号有交叠，且交叠于所述第三信号的下行频段；所述第一信号与所述第二信号，所述第三信号均无交叠；所述第一信号的上行频段与所述第二信号的上行频段之间的距离小于所述第一信号的上行频段与所述第三信号的上行频段之间的距离；
    所述第三收发链路用于通过所述第二天线进行所述第二信号的发射，所述第二信号的主集接收以及所述第三信号的分集接收；
    所述第四接收链路用于通过所述第二天线进行所述第一信号的分集接收。
  2. 根据权利要求1所述的射频电路，其特征在于，所述第一收发链路包括第一双工器以及第一开关；所述第一双工器用于对所述第一信号的上行信号和下行信号进行滤波；其中，所述第一信号的上行信号是指所述第一信号的上行频段的信号，所述第一信号的下行信号是指所述第一信号的下行频段的信号；
    所述第一双工器分别与第一端口，第二端口以及所述第一开关连接；所述第一开关与所述第一天线连接；其中，所述第一端口为所述第一信号的输出端口，所述第二端口为所述第一信号的主集接收端口；
    所述第一开关将所述第一双工器连接至所述第一天线时，所述第一信号的上行信号由所述第一端口输出，依次经过所述第一双工器，所述第一开关后，通过所述第一天线发射；所述第一信号的下行信号由所述第一天线接收后，依次经过所述第一开关，所述第一双工器后，由所述第二端口完成主集接收。
  3. 根据权利要求2所述的射频电路，其特征在于，所述第一双工器包括第一滤波器和第二滤波器；
    所述第一滤波器和所述第二滤波器的公共端口与所述第一开关连接；所述第一滤波器还与所述第一端口连接；所述第二滤波器还与所述第二端口连接；
    所述第一滤波器的通带为所述第一信号的上行频段；所述第二滤波器的通带为所述第一信号的下行频段；
    所述第一开关将所述第一双工器连接至所述第一天线时，所述第一信号的上行信号由所述第一端口输出，依次经过所述第一滤波器，所述第一开关后，通过所述第一天线发射；所述第一信号的下行信号由所述第一天线接收后，依次经过所述第一开关，所述第二滤波器后，由所述第二端口完成主集接收。
  4. 根据权利要求1所述的射频电路，其特征在于，所述第四接收链路包括第三滤波器以及第二开关；
    所述第三滤波器分别与所述第二开关以及第三端口连接；所述第二开关与所述第二天线连接；所述第三端口为所述第三信号的分集接收端口；
    所述第三滤波器的通带为所述第三信号的下行频段；
    所述第二开关将所述第三滤波器连接至所述第二天线时，所述第三信号的下行信号由所述第二天线接收后，依次经过所述第二开关，所述第三滤波器后，由所述第三端口完成分集接收；其中，所述第三信号的下行信号是指所述第三信号的下行频带的信号。
  5. 根据权利要求1所述的射频电路，其特征在于，所述第二收发链路包括第二双工器以及第一开关；所述第二双工器用于对所述第三信号的上行信号，所述第三信号的下行信号以及所述第二信号的下行信号进行滤波；其中，所述第三信号的上行信号是指所述第三信号的上行频段的信号，所述第三信号的下行信号是指所述第三信号的下行频段的信号，所述第二信号的下行信号是指所述第二信号的下行频段的信号；
    所述第二双工器分别与第四端口，第五端口以及所述第一开关连接；所述第一开关与所述第一天线连接；其中，所述第四端口为所述第三信号的输出端口，所述第五端口为所述第三信号的主集接收及所述第二信号的分集接收端口；
    所述第一开关将所述第二双工器连接至所述第一天线时，所述第三信号的上行信号由所述第四端口输出，依次经过所述第二双工器，所述第一开关后，通过所述第一天线发射；所述第三信号的下行信号由所述第一天线接收后，依次经过所述第一开关，所述第二双工器后，由所述第五端口完成主集接收；所述第二信号的下行信号由所述第一天线接收后，依次经过所述第一开关，所述第二双工器后，由所述第五端口完成分集接收。
  6. 根据权利要求5所述的射频电路，其特征在于，所述第二双工器包括第四滤波器和第五滤波器；
    所述第四滤波器和所述第五滤波器的公共端口与所述第一开关连接；所述第四滤波器还与所述第四端口连接；所述第五滤波器还与所述第五端口连接；
    所述第四滤波器的通带为所述第三信号的上行频段；所述第五滤波器的通带为所述第三信号的下行频段以及所述第二信号的下行频段；
    所述第一开关将所述第二双工器连接至所述第一天线时，所述第三信号的上行信号由所述第四端口输出，依次经过所述第四滤波器，所述第一开关后，通过所述第一天线发射；所述第三信号的下行信号由所述第一天线接收后，依次经过所述第一开关，所述第五滤波器后，由所述第五端口完成主集接收；所述第二信号的下行信号由所述第一天线接收后，依次经过所述第一开关，所述第五滤波器后，由所述第五端口完成分集接收。
  7. 根据权利要求1所述的射频电路，其特征在于，所述第三收发链路包括第三双工器以及第二开关；所述第三双工器用于对所述第二信号的上行信号，所述第二信号的下行信号以及所述第三信号的下行信号进行滤波；其中，所述第二信号的上行信号是指所述第二信号的上行频段的信号，所述第二信号的下行信号是指所述第二信号的下行频段的信号，所述第三信号的下行信号是指所述第三信号的下行频段的信号；
    所述第三双工器分别与第六端口，第七端口以及所述第二开关连接；所述第二开关与所述第二天线连接；其中，所述第六端口为所述第二信号的输出端口，所述第七端口为所述第二信号的主集接收及所述第三信号的分集接收端口；
    所述第二开关将所述第三双工器连接至所述第二天线时，所述第二信号的上行信号由所述第六端口输出，依次经过所述第三双工器，所述第二开关后，通过所述第二天线发射；所述第二信号的下行信号由所述第二天线接收后，依次经过所述第二开关，所述第三双工器后，由所述第七端口完成主集接收；所述第三信号的下行信号由所述第二天线接收后，依次经过所述第二开关，所述第三双工器后，由所述第七端口完成分集接收。
  8. 根据权利要求7所述的射频电路，其特征在于，所述第三双工器包括第六滤波器和第 七滤波器；
    所述第六滤波器和所述第七滤波器的公共端口与所述第二开关连接；所述第六滤波器还与所述第六端口连接；所述第七滤波器还与所述第七端口连接；
    所述第六滤波器的通带为所述第二信号的上行频段；所述第七滤波器的通带为所述第二信号的下行频段以及所述第三信号的下行频段；
    所述第二开关将所述第三双工器连接至所述第二天线时，所述第二信号的上行信号由所述第六端口输出，依次经过所述第六滤波器，所述第二开关后，通过所述第二天线发射；所述第二信号的下行信号由所述第二天线接收后，依次经过所述第二开关，所述第七滤波器后，由所述第七端口完成主集接收；所述第三信号的下行信号由所述第二天线接收后，依次经过所述第二开关，所述第七滤波器后，由所述第七端口完成分集接收。
  9. 根据权利要求1所述的射频电路，其特征在于，在所述第一信号与所述第二信号进行ENDC时，所述第一收发链路，所述第二收发链路，所述第三收发链路，所述第四接收链路均连通；在所述第二信号与所述第三信号进行ENDC时，所述第二收发链路和所述第三收发链路连通，所述第一收发链路和所述第四接收链路断开。
  10. 根据权利要求1所述的射频电路，其特征在于，所述射频电路还包括：第五接收链路和第六收发链路；
    所述第五接收链路与所述第一天线连接；所述第六收发链路与所述第二天线连接；
    所述第五接收链路用于通过所述第一天线进行第四信号的分集接收；所述第六收发链路用于通过所述第二天线进行所述第四信号的发射以及所述第四信号的主集接收；所述第四信号与所述第三信号无交叠。
  11. 根据权利要求10所述的射频电路，其特征在于，所述第五接收链路包括第八滤波器以及第一开关；
    所述第八滤波器分别与所述第一开关以及第八端口连接；所述第一开关还与所述第一天线连接；所述第八端口为所述第四信号的分集接收端口；
    所述第八滤波器的通带为所述第四信号的下行频段；
    所述第一开关将所述第八滤波器连接至所述第一天线时，所述第四信号的下行信号由所述第一天线接收后，依次经过所述第一开关，所述第八滤波器后，由所述第八端口完成分集接收；其中，所述第四信号的下行信号是指所述第四信号的下行频段的信号。
  12. 根据权利要求10所述的射频电路，其特征在于，所述第六收发链路包括第四双工器以及第二开关；所述第四双工器用于对所述第四信号的上行信号以及所述第四信号的下行信号进行滤波；其中，所述第四信号的上行信号是指所述第四信号的上行频段的信号，所述第四信号的下行信号是指所述第四信号的下行频段的信号；
    所述第四双工器分别与第九端口，第十端口以及所述第二开关连接；所述第二开关与所述第二天线连接；其中，所述第九端口为所述第四信号的输出端口，所述第十端口为所述第四信号的主集接收端口；
    所述第二开关将所述第四双工器连接至所述第二天线时，所述第四信号的上行信号由所述第九端口输出，依次经过所述第四双工器，所述第二开关后，通过所述第二天线发射；所述第四信号的下行信号由所述第二天线接收，依次经过所述第二开关，所述第四双工器后，由所述第十端口完成主集接收。
  13. 根据权利要求12所述的射频电路，其特征在于，所述第四双工器包括第九滤波器和第十滤波器；
    所述第九滤波器和所述第十滤波器的公共端口与所述第二开关连接；所述第九滤波器还与所述第九端口连接；所述第十滤波器还与所述第十端口连接；
    所述第九滤波器的通带为所述第四信号的上行频段；所述第十滤波器的通带为所述第四信号的下行频段；
    所述第二开关将所述第四双工器连接至所述第二天线时，所述第四信号的上行信号由所述第九端口输出，依次经过所述第九滤波器，所述第二开关后，通过所述第二天线发射；所述第四信号的下行信号由所述第二天线接收，依次经过所述第二开关，所述第十滤波器后，由所述第十端口完成主集接收。
  14. 一种射频模组，其特征在于，所述射频模组包括：权利要求1-13任一项所述的射频电路，第一天线，第二天线，信号输出模块以及信号接收模块；
    所述射频电路中的第一收发链路和所述第二收发链路均与所述第一天线连接；所述射频电路中的所述第三收发链路和所述第四接收链路均与所述第二天线连接；
    所述信号输出模块分别与所述第一收发链路，所述第二收发链路以及所述第三收发链路连接；所述信号输出模块用于输出低频信号，所述低频信号至少包括：第一信号，第二信号，第三信号；
    所述信号接收模块分别与所述第一收发链路，所述第二收发链路，所述第三收发链路以及所述第四接收链路连接；所述信号接收模块用于接收所述低频信号。
  15. 根据权利要求14所述的射频模组，其特征在于，所述射频模组还包括第三开关；
    所述信号输出模块通过所述第三开关与所述射频电路连接；
    所述第三开关用于，在所述第一信号与所述第二信号进行ENDC时，将所述信号输出模块连通至所述第一收发链路和所述第三收发链路，并断开所述信号输出模块与所述第二收发链路之间的连接；
    所述第三开关还用于，在所述第二信号和所述第三信号进行ENDC时，将所述信号输出模块连通至所述第二收发链路和所述第三收发链路，并断开所述信号输出模块与所述第一收发链路之间的连接。
  16. 一种电子设备，其特征在于，所述电子设备包括如权利要求1-13任一项所述的射频电路或权利要求14-15任一项所述的射频模组。
PCT/CN2023/117815 2022-11-28 2023-09-08 一种射频电路，射频模组及电子设备 Ceased WO2024114030A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP23896187.4A EP4614819A4 (en) 2022-11-28 2023-09-08 Radio frequency circuit, radio frequency module, and electronic device
CN202380071523.2A CN119999098A (zh) 2022-11-28 2023-09-08 一种射频电路,射频模组及电子设备

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202211501785.1 2022-11-28
CN202211501785.1A CN118100980A (zh) 2022-11-28 2022-11-28 一种射频电路，射频模组及电子设备

Publications (1)

Publication Number Publication Date
WO2024114030A1 true WO2024114030A1 (zh) 2024-06-06

Family

ID=91143019

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2023/117815 Ceased WO2024114030A1 (zh) 2022-11-28 2023-09-08 一种射频电路，射频模组及电子设备

Country Status (3)

Country Link
EP (1) EP4614819A4 (zh)
CN (2) CN118100980A (zh)
WO (1) WO2024114030A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2026076566A1 (zh) * 2024-10-08 2026-04-16 荣耀终端股份有限公司 射频前端模组和电子设备

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118748560A (zh) * 2024-07-09 2024-10-08 中国科学院上海微系统与信息技术研究所 一种双模态射频模组

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140003300A1 (en) * 2012-06-29 2014-01-02 Qualcomm Incorporated Antenna interface circuits for carrier aggregation on multiple antennas
CN111800160A (zh) * 2020-06-30 2020-10-20 联想(北京)有限公司 一种电子设备
CN112398503A (zh) * 2020-11-09 2021-02-23 维沃移动通信有限公司 多模式射频电路、射频信号的传输方法、装置及电子设备
CN112422148A (zh) * 2019-12-31 2021-02-26 Oppo广东移动通信有限公司 射频模组及电子设备
CN114244394A (zh) * 2021-11-30 2022-03-25 荣耀终端有限公司 射频前端模块、终端设备以及射频前端模块的控制方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10720953B1 (en) * 2019-05-30 2020-07-21 Shure Acquisition Holdings, Inc. Scalable diversity deployment for wide tuning range transceiver

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140003300A1 (en) * 2012-06-29 2014-01-02 Qualcomm Incorporated Antenna interface circuits for carrier aggregation on multiple antennas
CN112422148A (zh) * 2019-12-31 2021-02-26 Oppo广东移动通信有限公司 射频模组及电子设备
CN112653488A (zh) * 2019-12-31 2021-04-13 Oppo广东移动通信有限公司 射频模组、天线控制方法以及电子设备
CN111800160A (zh) * 2020-06-30 2020-10-20 联想(北京)有限公司 一种电子设备
CN112398503A (zh) * 2020-11-09 2021-02-23 维沃移动通信有限公司 多模式射频电路、射频信号的传输方法、装置及电子设备
CN114244394A (zh) * 2021-11-30 2022-03-25 荣耀终端有限公司 射频前端模块、终端设备以及射频前端模块的控制方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4614819A4

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2026076566A1 (zh) * 2024-10-08 2026-04-16 荣耀终端股份有限公司 射频前端模组和电子设备

Also Published As

Publication number Publication date
EP4614819A4 (en) 2026-03-04
EP4614819A1 (en) 2025-09-10
CN119999098A (zh) 2025-05-13
CN118100980A (zh) 2024-05-28

Similar Documents

Publication Publication Date Title
CN111327344A (zh) 射频系统及电子设备
WO2012139344A1 (zh) Nfc双模移动终端及其通信方法
CN115412118B (zh) 一种多工器，射频模组及电子设备
WO2024114030A1 (zh) 一种射频电路，射频模组及电子设备
WO2015131456A1 (zh) 多模双通终端
CN106788472B (zh) 载波聚合的射频前端装置及移动终端
CN115241642B (zh) 一种多频宽带自解耦终端天线及电子设备
CN111245469A (zh) 射频电路和电子设备
KR102720544B1 (ko) 이중 접속 회로 및 그것을 포함하는 전자 장치
CN108347251A (zh) 射频前端电路
CN107231167A (zh) 射频电路的电子设备
CN115425390A (zh) 一种终端天线及电子设备
CN118971909B (zh) 一种射频前端模组、射频收发装置及电子设备
CN119210498B (zh) 一种射频模组及电子设备
CN218829922U (zh) 一种射频模组，射频系统及电子设备
US12368412B2 (en) Receiving module, packaging structure, printed circuit board, and electronic device
CN115208430B (zh) 射频电路、收发模组、接收模组和相关装置
WO2024198486A1 (zh) 一种功率检测电路及方法
CN215120767U (zh) 应用于载波聚合的三路天线复用器
WO2023159651A1 (zh) 转换电路及转换方法、射频芯片、射频收发机、电子设备
CN222484692U (zh) 射频前端模块、无线通信电路、芯片及电子设备
CN217468811U (zh) 一种天线结构及终端设备
EP4529106A1 (en) Radio frequency module
CN118057672B (zh) 阻抗匹配方法和电子设备
CN111490813A (zh) 天线复用射频装置以及移动终端

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23896187

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 202380071523.2

Country of ref document: CN

WWP Wipo information: published in national office

Ref document number: 202380071523.2

Country of ref document: CN

WWE Wipo information: entry into national phase

Ref document number: 2023896187

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 2023896187

Country of ref document: EP

Effective date: 20250603

NENP Non-entry into the national phase

Ref country code: DE

WWP Wipo information: published in national office

Ref document number: 2023896187

Country of ref document: EP