WO2022062575A1 - 射频系统和通信设备 - Google Patents

射频系统和通信设备 Download PDF

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Publication number
WO2022062575A1
WO2022062575A1 PCT/CN2021/105365 CN2021105365W WO2022062575A1 WO 2022062575 A1 WO2022062575 A1 WO 2022062575A1 CN 2021105365 W CN2021105365 W CN 2021105365W WO 2022062575 A1 WO2022062575 A1 WO 2022062575A1
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WIPO (PCT)
Prior art keywords
antenna
receiving module
radio frequency
switch unit
module
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/CN2021/105365
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English (en)
French (fr)
Inventor
王国龙
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.)
Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Publication date
Application filed by Guangdong Oppo Mobile Telecommunications Corp Ltd filed Critical Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority to EP21870954.1A priority Critical patent/EP4220973B1/en
Publication of WO2022062575A1 publication Critical patent/WO2022062575A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • 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
    • 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
    • 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
    • H04B7/0413—MIMO systems

Definitions

  • the present application relates to the field of radio frequency technology, and in particular, to a radio frequency system and communication equipment.
  • Phase7 products that support integration of various standards
  • the integration of devices is getting higher and higher, and the package size of devices is also getting smaller and smaller.
  • the Phase7 product for example, a diversity receiving device used to support mid-to-high frequency bands of LTE signals, is applied to a radio frequency transceiver system to support the MIMO function of 5G NR signals, the cost is high and the space occupied is large.
  • a radio frequency system and a communication device are provided.
  • a radio frequency system comprising: a radio frequency transceiver, a first transceiver module, a receiving module, a first MIMO receiving module, a second MIMO receiving module, a first antenna, a second antenna, a third antenna and a fourth antenna;
  • the radio frequency transceiver is connected to the first antenna via the first transceiver module to form a first MIMO receiving channel of the 5G signal;
  • the radio frequency transceiver is connected to the second antenna via the receiving module to form a second MIMO receiving channel of the 5G signal; wherein, the first transceiver module and the receiving module are both configured with at least four receiving channels for Support the reception of 5G signals in four preset frequency bands;
  • the radio frequency transceiver is connected to the third antenna via the first MIMO receiving module to form a third MIMO receiving channel of the 5G signal;
  • the radio frequency transceiver is connected to the fourth antenna via the second MIMO receiving module to form a fourth MIMO receiving channel of the 5G signal; wherein the first MIMO receiving module and the second MIMO receiving module are both configured with four MIMO receiving modules.
  • Receiver channels are used to support the reception of 5G signals in four preset frequency bands.
  • a communication device comprising a radio frequency system as described above.
  • the above-mentioned radio frequency system and communication device can form four MIMO receiving channels through the first transceiver module, the receiving module, the first MIMO receiving module, the second MIMO receiving module and the four antennas, so that the radio frequency system can support four preset
  • the 4*4 MIMO function of the 5G signal in the frequency band further meets the communication needs at home and abroad.
  • the first MIMO receiving module and the second MIMO receiving module are only equipped with four receiving channels to support four preset
  • the reception of 5G signals in the frequency band enables each receiving channel to be utilized, improves the use efficiency of the first MIMO receiving module and the second MIMO receiving module, and reduces the cost.
  • the space occupied by the device can also be reduced, and the link loss of the receiving path can also be reduced.
  • FIG. 1 is a schematic diagram of a frame of a radio frequency system according to an embodiment
  • FIG. 2 is a schematic diagram of a first MIMO receiving module according to an embodiment
  • FIG. 3 is a second schematic diagram of a first MIMO receiving module according to an embodiment
  • FIG. 4 is a third schematic diagram of a first MIMO receiving module according to an embodiment
  • FIG. 5 is a fourth schematic diagram of a first MIMO receiving module according to an embodiment
  • Fig. 6a is a schematic diagram of the pins of the first MIMO receiving module in Fig. 4;
  • FIG. 6b is a schematic diagram of the packaging structure of the first MIMO receiving module in FIG. 4;
  • Fig. 7a is a schematic diagram of the pins of the first MIMO receiving module in Fig. 5;
  • Figure 7b is a schematic diagram of the packaging structure of the first MIMO receiving module in Figure 5;
  • FIG. 8 is a second schematic diagram of the architecture of a radio frequency system according to an embodiment
  • FIG. 9 is a schematic diagram of a framework of a first transceiver module according to an embodiment
  • FIG. 10 is a schematic diagram of a frame of a receiving module according to an embodiment
  • FIG. 11 is a third schematic diagram of a framework of a radio frequency system according to an embodiment
  • FIG. 12 is a fourth schematic diagram of a framework of a radio frequency system according to an embodiment
  • FIG. 13 is a fifth schematic diagram of a frame of a radio frequency system according to an embodiment
  • FIG. 14 is a sixth schematic diagram of a frame of a radio frequency system according to an embodiment.
  • first, second, etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element.
  • a first transceiving module may be referred to as a second transceiving module, and similarly, a second transceiving module may be referred to as a first transceiving module, without departing from the scope of this application.
  • Both the first transceiver module and the second transceiver module are transceiver modules, but they are not the same transceiver module.
  • first and second are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with “first”, “second” may expressly or implicitly include at least one of that feature.
  • plural means at least two, such as two, three, etc., unless expressly and specifically defined otherwise.
  • severeal means at least one, such as one, two, etc., unless expressly and specifically defined otherwise.
  • the radio frequency system involved in the embodiments of the present application may be applied to a communication device with a wireless communication function
  • the communication device may be a handheld device, a vehicle-mounted device, a wearable device, a computing device, or other processing device connected to a wireless modem, and various forms of The user equipment (User Equipment, UE) (for example, mobile phone), mobile station (Mobile Station, MS) and so on.
  • UE User Equipment
  • MS mobile station
  • Network devices may include base stations, access points, and the like.
  • an embodiment of the present application provides a radio frequency system.
  • the RF system can support 4*4MIMO function.
  • the MIMO function refers to the use of multiple transmit and receive antennas on the transmit port and receive port respectively, making full use of space resources, and realizing multiple transmission and multiple reception through multiple antennas. times to increase the system channel capacity.
  • the communication device and the base station may form 2*2 MIMO or 4*4 MIMO. Taking 4*4 MIMO as an example, the configuration of the antenna ports of the receiving channel is shown in Table 1. It should be noted that, when testing the receiving performance with the Tel protocol, all four receiving channels are also connected to the RF transceiver. Four channels constitute the downlink of MIMO, all of which receive the signals sent by the uplink base station to improve the performance of the radio frequency system.
  • Channel0, Channel1, Channel2, and Channel3 can be understood as the first MIMO receiving channel, the second MIMO receiving channel, the third MIMO receiving channel, and the fourth MIMO receiving channel
  • the antenna port PRX (the main set of receiving ports ) can be understood as the antenna port of the first transceiver module
  • the antenna port DRX (diversity receiving port) can be understood as the antenna port of the receiving module
  • the antenna port PRX MIMO (the main set MIMO receiving port) can be understood as the antenna of the first MIMO receiving module Port
  • antenna port DRX MIMO (diversity MIMO receiving port) can be understood as the antenna port of the second MIMO receiving module.
  • China Mobile's 5G frequency band is mainly N41. Therefore, all communication devices support MIMO in the N41 frequency band.
  • the radio frequency system in the embodiment of the present application can not only support the MIMO of the N41 frequency band, but also can simultaneously support the 4*4 MIMO of the N1, N3, and N7 frequency bands of the foreign operator.
  • the radio frequency system includes: a radio frequency transceiver 100, a first transceiver module 200, a receiving module 300, a first MIMO receiving module 400, a second MIMO receiving module 500, a first antenna Ant1, a second antenna Ant2, The third antenna Ant3 and the fourth antenna Ant4.
  • the first antenna Ant1, the second antenna Ant2, the third antenna Ant3 and the fourth antenna Ant4 may be used to support the reception and transmission of radio frequency signals of different frequency bands.
  • the radio frequency signal may include a 5G signal, a 4G signal, a 3G signal, a 2G signal, and the like.
  • the first antenna Ant1, the second antenna Ant2, the third antenna Ant3 and the fourth antenna Ant4 may be formed using any suitable type of antenna.
  • the first antenna Ant1, the second antenna Ant2, the third antenna Ant3, and the fourth antenna Ant4 may include antennas with resonant elements formed from the following antenna structures: array antenna structures, loop antenna structures, patch antenna structures, slot antennas At least one of a structure, a helical antenna structure, a strip antenna, a monopole antenna, a dipole antenna, and the like. Different types of antennas can be used for different frequency bands and combinations of frequency bands. In this embodiment of the present application, the types of the first antenna Ant1, the second antenna Ant2, the third antenna Ant3, and the fourth antenna Ant4 are not further limited.
  • the first transceiver module 200 may be configured with at least four receiving paths to support the receiving of 5G signals in four preset frequency bands.
  • the first transceiver module 200 may be an integrated device, for example, may be a middle and high frequency power amplifier module with built-in low noise amplifier (Middle and High Band Power Amplifier Modules including Duplexers With LNA, MHB L-PA Mid), that is, the RF L-PA Mid device.
  • the first transceiver module 200 can also support receiving and transmitting intermediate frequency signals and high frequency signals of multiple different frequency bands.
  • the receiving module 300 is also configured with at least four receiving paths for supporting the receiving of 5G signals in four preset frequency bands.
  • the receiving module 300 may be an integrated device, for example, may be a diversity receiving (Diversity Receive, DRX) module, that is, a radio frequency DRX device.
  • the receiving module 300 can also support receiving low-frequency signals, intermediate-frequency signals and high-frequency signals of multiple different frequency bands.
  • the four receiving paths configured in the first transceiver module 200 and the receiving module 300 can also realize the receiving control of 4G LTE signals in multiple medium and high frequency frequency bands.
  • reception control of signals in frequency bands B1, B3, B7, and B41 can be implemented.
  • some 4G LTE signals and 5G NR signals have the same frequency band (for example, N1, N3, N7, N41) range, that is, the first transceiver module 200 can realize the receiving control of some 5G NR signals.
  • the relationship between the 5G NR signal and the 4G LTE signal is shown in Table 2.
  • the receiving channels of the 5G NR signal frequency bands N1, N3, N7, and N41 correspond one-to-one with the 4G LTE signal frequency bands B1, B3, B7, and B41. Common to receive channels.
  • the four receiving paths configured in the first transceiver module 200 and the receiving module 300 can realize the receiving control of B1, B3, B7, B41, N1, N3, N7, and N41, wherein B1 and N1 share the same Receive path, for example, B1 receive path; B3 and N3 share the same receive path, for example, B3 receive path; B7 and N7 share the same receive path, for example, B7 receive path; B41 and N41 share the same receive path, for example, B41 receive path .
  • the radio frequency transceiver 100 is connected to the first antenna Ant1 via the first transceiver module 200 to form a first MIMO receiving channel for 5G signals, and the first MIMO receiving channel can support receiving 5G signals in four preset frequency bands.
  • the radio frequency transceiver 100 is connected to the second antenna Ant2 via the receiving module 300 to form a second MIMO receiving channel for 5G signals, and the second MIMO receiving channel can support receiving 5G signals in four preset frequency bands.
  • the radio frequency transceiver 100 is connected to the third antenna Ant3 through the first MIMO receiving module 400 to form a third MIMO receiving channel of the 5G signal; the radio frequency transceiver 100 is connected to the fourth antenna Ant4 through the second MIMO receiving module 500 to form a third MIMO receiving channel of the 5G signal.
  • both the first MIMO receiving channel and the second MIMO receiving channel may include four sub-receiving channels, namely, a B1 receiving channel, a B3 receiving channel, a B7 receiving channel, and a B41 receiving channel.
  • the first MIMO receiving module 400 and the second MIMO receiving module 500 are each configured with four receiving paths, which are used to support the receiving of 5G signals in four preset frequency bands.
  • the four receiving channels configured by the first MIMO receiving module 400 and the second MIMO receiving module 500 can be respectively the four sub-receiving channels N1 receiving channel, N3 receiving channel, N7 receiving channel, and N41, which can be used to support N1, N3 receiving, and N41 receiving channels. Reception of the four 5G frequency bands N3, N7, and N41.
  • the above radio frequency system can form four MIMO receiving channels through the first transceiver module 200, the receiving module 300, the first MIMO receiving module 400, the second MIMO receiving module 500 and the four antennas, so that the radio frequency system can support four pre- The 4*4 MIMO function of the 5G signal in the frequency band is set to meet the communication needs at home and abroad.
  • the first MIMO receiving module 400 and the second MIMO receiving module 500 are only configured with four receiving channels to support four receiving channels.
  • the reception of 5G signals in the preset frequency bands enables each receiving channel to be utilized, improves the use efficiency of the first MIMO receiving module 400 and the second MIMO receiving module 500, and reduces the cost.
  • the diversity receiving device of the segment can also reduce the space occupied by the device and reduce the link loss of the receiving path.
  • the first MIMO receiving module 400 and the second MIMO receiving module 500 are both configured with an antenna port MHB ANT and four receiving ports LNA OUT (1, 2, 3, 4).
  • the first MIMO receiving module 400 and the second MIMO receiving module 500 both include: a first switching unit and four filtering units.
  • the first MIMO receiving module 400 is taken as an example for description.
  • the first MIMO receiving module 400 includes: a first switching unit 410 and four filtering units 420 .
  • the first switch unit 410 includes a first end and four second ends, wherein the first end is connected to the antenna port MHB ANT, and each second end of the first switch unit 410 is connected to a receiving port through a filter unit 420 respectively.
  • the LNA OUT connection is used to conduct the receiving path between the antenna port MHB ANT and any receiving port LNA OUT. That is, the filtering unit 420 is provided on each receiving channel, and is used for filtering the received 5G signal, and the frequency bands of the 5G signal output by each filtering unit 420 are different from each other.
  • the filtering unit 420 may correspondingly include a filter that only allows 5G signals in a preset frequency band to pass. If the 5G signals of multiple frequency bands include four different frequency bands of N1, N3, N7, and N41, four filtering units 420 (that is, four filters) can be set correspondingly to realize the filtering of the four 5G signals. deal with.
  • the radio frequency system can control the on-off state of the first switch unit 410 to conduct 5G signals of multiple frequency bands to any filter unit 420 .
  • the filter may be a band-pass filter, a high-pass filter, or the like. It should be noted that, in the embodiment of the present application, the type of the filter in each filtering unit 420 is not further limited, and an appropriate filter can be selected according to the frequency band of the 5G signal to be filtered.
  • the first switch unit 410 is an SP4T switch
  • the four filter units 420 may be respectively denoted as the first filter unit 420 , the second filter unit 420 , the third filter unit 420 and the fourth filter unit 420 .
  • the contact (1) of the SP4T switch is connected to the antenna port MHB ANT as the first end of the first switch unit 410, and the contacts (2), (3), (4), (5) of the SP4T switch ) can be used as the four second terminals of the first switch unit 410 .
  • the antenna port MHB ANT is connected with a receiving port LNA OUT1 through the contact (1), the contact (2) and the first filtering unit 420 to form an N1 receiving path;
  • the antenna port MHB ANT is connected through the contact (1) , contact (3), the second filtering unit 420 is connected with another receiving port LNA OUT2 to form an N3 receiving path;
  • the antenna port MHB ANT is connected through the contact (1), the contact (2), the third filtering unit 420 Connect with another receiving port LNA OUT3 to form an N7 receiving path;
  • the antenna port MHB ANT is connected to another receiving port LNA OUT4 through a contact (1), a contact (2) and the fourth filtering unit 420 to form an N41 receive path.
  • the first switch unit 410 may further include multiple SPDT switches, and the multiple SPDT switches may be controlled by time division so that any one of the N1, N3, N7 and N41 receiving paths can be turned on at the same time.
  • the specific composition form of the first switch unit 410 is not further limited, and can be set according to actual needs. Meanwhile, the structures of the first MIMO receiving module 400 and the second MIMO receiving module 500 may be the same or different.
  • the first MIMO receiving module 400 and the second MIMO receiving module 500 are only configured with four receiving paths, for example, the N1 receiving path, the N3 receiving path, the N7 receiving path, and the N41 receiving path, so as to be suitable for supporting
  • the reception of 5G signals in the four frequency bands of N1, N3, N7 and N41 enables the radio frequency system to support the 4*4 MIMO function of multi-band 5G signals.
  • the first MIMO receiving module 400 and the second MIMO receiving module 500 are each configured with an antenna port MHB ANT, a polling port SRS, and four receiving ports LNA OUT.
  • the first MIMO receiving module 400 is taken as an example for description, wherein the first switch unit 410 may include a first end and five second ends.
  • the first switch unit 410 may be an SP5T switch. Specifically, the contact (1) of the SP5T switch is connected to the antenna port MHB ANT as the first end of the first switch unit 410, and the contacts (2), (3), (4), (5) of the SP4T switch ) and (6) can be used as the four second terminals of the first switch unit 410 .
  • the antenna port MHB ANT is connected with a receiving port LNA OUT1 through the contact (1), the contact (2) and the first filtering unit 420 to form an N1 receiving path;
  • the antenna port MHB ANT is connected through the contact (1) , contact (3), the second filtering unit 420 is connected with another receiving port LNA OUT2 to form an N3 receiving path;
  • the antenna port MHB ANT is connected through the contact (1), the contact (2), the third filtering unit 420 Connect with another receiving port LNA OUT3 to form an N7 receiving path;
  • the antenna port MHB ANT is connected to another receiving port LNA OUT4 through a contact (1), a contact (2) and the fourth filtering unit 420 to form an N41 receive path.
  • the round-emitting port SRS is connected with the antenna port MHB ANT through the contact (6) and the contact (1) to form a transmission path.
  • the round transmission port SRS can be connected to the first transceiver module 200 in the foregoing embodiment, and is used for receiving 5G signals of various frequency bands transmitted by the first transceiver module 200, so as to transmit the received 5G signals to the other party through the transmission path.
  • the antenna port MHB ANT is connected to the antenna to realize the transmission of 5G signals.
  • the first MIMO receiving module 400 and the second MIMO receiving module 500 further include a second switch unit 430 .
  • the first MIMO receiving module 400 is taken as an example for illustration.
  • the second switching unit 430 of the first MIMO receiving module 400 includes four first ends and four second ends, wherein four The first ends are respectively connected to the four filtering units 420 in a one-to-one correspondence, and the four second ends are respectively connected to the four receiving ports LNA OUT (1, 2, 3, 4) in a one-to-one correspondence.
  • the second switch unit 430 may be a 4P4T switch, and by controlling the switch, the first MIMO receiving module 400 and the second MIMO receiving module 500 can be flexibly controlled to output N1, N3, N7 and N41 in the four frequency bands. of at least one 5G signal to the radio frequency transceiver 100 .
  • the first MIMO receiving module 400 and the second MIMO receiving module 500 further include a control unit. As shown in FIG. 4 and FIG. 5 , the first MIMO receiving module 400 is taken as an example for illustration.
  • the control unit 440 of the first MIMO receiving module 400 can be connected to the first switching unit 410 and the second switching unit 430 respectively, and can be used to control the The first switch unit 410 and the second switch unit 430 are used to selectively turn on any receiving channel.
  • control unit 440 may be a mobile industry processor interface (Mobile Industry Processor Interface, MIPI)-RF Front End Control Interface (RF Front End Control Interface, RFFE) control unit or a RF Front End Control Interface (RF Front End Control Interface, RFFE) ) control unit, which conforms to the control protocol of the RFFE bus.
  • MIPI Mobile Industry Processor Interface
  • RF Front End Control Interface RF Front End Control Interface
  • RFFE RF Front End Control Interface
  • the first MIMO receiving module 400 and the second MIMO receiving module 500 are also configured with the input pin CLK of the clock signal, the input of the unidirectional/bidirectional data signal or the bidirectional pins SDATAS, Power supply pin VDD, reference voltage pin VIO and so on.
  • the first switch unit, the four filter units, the second switch unit, and the control unit in the first MIMO receiving module 400 and the second MIMO receiving module 500 can all be integrated into the same device to form a 5G NR DRX devices. That is, the first MIMO receiving module 400 can be understood as a first 5G NR DRX device, and the second MIMO receiving module 500 can be understood as a second 5G NR DRX device. Exemplarily, the first MIMO receiving module 400 is taken as an example for description. Based on the 5G NR DRX device shown in Figure 4, each device in the 5G NR DRX device can be integrated and packaged in the same package module.
  • each pin in the first MIMO receiving module 400 (package chip) is connected to the first The ports configured by a MIMO receiving module 400 correspond to each other one by one.
  • the package specification of the first MIMO receiving module 400 is shown in FIG. 6b.
  • each device in the MIMO receiving module 300 as shown in FIG. 5 can be integrated and packaged in the same package module.
  • each lead in the first MIMO receiving module 400 (package chip) The pins are in one-to-one correspondence with multiple ports configured in the first MIMO receiving module 400 .
  • the package specification of the first MIMO receiving module 400 is shown in FIG. 7b.
  • the first MIMO receiving module 400 and the second MIMO receiving module 500 in the embodiments of the present application have a high degree of integration, which can reduce the space occupied by each device, and facilitate the small size of the first MIMO receiving module 400 and the second MIMO receiving module 500 At the same time, it can also save costs and improve the utilization rate of each device.
  • Channel0 path the first antenna Ant1 ⁇ the antenna port ANT2 of the first transceiver module 200 ⁇ the N41 receiving path ⁇ the radio frequency transceiver 100 .
  • Channel1 path second antenna Ant2 ⁇ antenna port MHB ANT of receiving module 300 ⁇ N41 receiving path ⁇ RF transceiver 100.
  • Channel2 path the third antenna Ant3 ⁇ the antenna port MHB ANT of the first MIMO receiving module 400 ⁇ the first switching unit 410 ⁇ the filtering unit 420 ⁇ the second switching unit 430 ⁇ the radio frequency transceiver 100 .
  • Channel3 path fourth antenna Ant4 ⁇ antenna port MHB ANT of the second MIMO receiving module 500 ⁇ first switch unit 510 ⁇ filter unit 520 ⁇ second switch unit 530 ⁇ RF transceiver 100.
  • N1, N3, and N7 are similar to those of N41, and will not be described in detail here.
  • the radio frequency system in the above-mentioned embodiment can support 4*4 MIMO in four frequency bands of N1, N3, N7 and N41, and at the same time, the first MIMO receiving module 400 and the second MIMO receiving module 500 are only configured with four receiving channels
  • the channel is used to support the reception of 5G signals in four preset frequency bands, so that each receiving channel is utilized, improving the use efficiency of the first MIMO receiving module 400 and the second MIMO receiving module 500, and reducing costs.
  • the link loss of the receiving path can be reduced.
  • the first transceiver module 200 is further configured with multiple transmission channels, which are used to support the transmission of 5G signals in multiple preset frequency bands.
  • the multiple transmission paths and the multiple reception paths can be set correspondingly.
  • the multiple transmission paths can realize the transmission control of B1, B3, B7, B41, N1, N3, N7, and N41.
  • B1 and N1 shares the same transmission channel, for example, B1 transmission channel;
  • B3 and N3 share the same transmission channel, for example, B3 transmission channel;
  • B7 and N7 share the same transmission channel, for example, B7 transmission channel;
  • B41 and N41 share the same transmission channel, for example, B41 launch channel.
  • a multi-channel selection switch is configured in the first transceiver module 200 to selectively switch any transmission channel or any transmission channel in the first transceiver module 200.
  • the first transceiver module 200 is configured with two antenna ports ANT1 and ANT2, and each antenna port ANT1 and ANT2 is used to transmit 4G/5G signals of different frequency bands.
  • 4G/5G signals in frequency bands B1/N1 and B3/N3 can be transmitted through antenna port ANT1
  • 4G/5G signals in frequency bands B7/N7 and B41/N41 can be transmitted through antenna port ANT2.
  • the multi-channel selector switch 210 may include two first terminals and a plurality of second terminals.
  • the two first terminals of the multi-channel selection switch 210 can be respectively connected to the two antenna ports ANT1 and ANT2 of the first transceiver module 200 in a one-to-one correspondence, and the plurality of second terminals of the multi-channel selection switch 210 can be correspondingly connected to
  • the multi-channel transmitting channel is connected with the multi-channel receiving channel, so as to realize the sending and receiving control of 4G/5G signals of multiple preset frequency bands.
  • each transmission channel may include devices such as power amplifier PA, filter, and radio frequency switch, so as to realize amplification, filtering, and switching transmission control of 4G/5G signals of different frequency bands.
  • Each receiving channel may include RF switches, filters, and low noise amplifiers, etc., to amplify, filter, and switch receiving control of 4G/5G signals of different frequency bands received by the antenna port MHB ANT.
  • the first transceiver module 200 is further configured to transmit and receive 4G signals in other medium and high frequency bands. Specifically, the first transceiver module 200 may also be used to implement transceiver control of 4G signals in frequency bands such as B25, B30, B32, B66, and B39.
  • the receiving module 300 is configured with an antenna port MHB ANT and a transmitting port MHB TRX1, wherein the receiving module 300 includes a seventh switch unit 310 and a plurality of receiving circuits, wherein the seventh The switch unit 310 includes a first end and a plurality of second ends, the first end of the seventh switch unit 310 is connected to the antenna port MHB ANT, and a part of the second ends of the seventh switch unit 310 are respectively connected to the plurality of receiving circuits in a one-to-one correspondence. , the other second end of the seventh switch unit 310 is connected to the transmit port MHB TRX1.
  • Each receiving circuit may include a radio frequency switch, a filter, and a low noise amplifier, etc., to amplify, filter, and switch receiving control of 4G/5G signals of different frequency bands received by the antenna port MHB ANT.
  • the seventh switch unit 310 may be an SP7T switch.
  • the receiving module 300 is further configured to receive 4G signals in other low, medium and high frequency bands. Specifically, the receiving module 300 can also be used to realize the control of sending and receiving 4G signals in frequency bands such as B8, B26, B25, B39, B4, B34, B66, and B40.
  • the radio frequency system feeds back channel information in two different modes, a precoding matrix indicator (Precoding Matrix Indicator, PMI) and a channel sounding reference signal (Sounding Reference Signal, SRS).
  • PMI is a function that all 5G communication equipment must support
  • SRS is an optional function.
  • PMI is a pre-set mechanism that the base station uses to estimate channel information and resource requirements and report it to the base station by means of terminal measurements and various quantization algorithms.
  • the communication device directly reports the channel information to the base station, which is obviously more accurate.
  • the SRS information sent by the communication device is the method used by the base station to detect the location and channel quality of the terminal; the SRS antenna rotation is specifically described as follows:
  • 1T1R fixed on the first antenna Ant1 to feed back information to the base station, and does not support SRS rotation;
  • 1T4R SRS information is transmitted in turn from the first antenna Ant1 to the fourth antenna Ant4, and only one antenna is selected for transmission at a time.
  • this mode is adopted for non-independent networking;
  • 2T4R The first antenna Ant1 to the fourth antenna Ant4 transmits SRS information in turn, and two antennas are selected to transmit at the same time. Currently, this mode is adopted for independent networking.
  • SRS mode the more antennas that can participate in sending reference signals, the more accurate the channel estimation, and the higher the rate that can be obtained; when the number of antennas is the same, the independent networking (Standalone, SA) mode is better than the non-independent networking ( Non-Standalone, NSA) mode completes channel estimation faster and improves network channel estimation speed.
  • SA independent networking
  • Non-Standalone, NSA non-independent networking
  • the radio frequency system further includes a switch module 600 .
  • the switch module 600 is respectively connected with the first transceiver module 200, the receiving module 300, the first MIMO receiving module 400, the second MIMO receiving module 500, the first antenna Ant1, the second antenna Ant2, the third antenna Ant3 and the fourth antenna Ant4 , the third antenna Ant3, and the fourth antenna Ant4 are connected.
  • the switch module 600 is used to conduct the transmission paths between the radio frequency transceiver 100 and the first antenna Ant1, the second antenna Ant2, the third antenna Ant3 and the fourth antenna Ant4 respectively, so that the radio frequency system supports 1T4R
  • the SRS function that is, the radio frequency system can be enabled to support the SRS function in the independent networking mode.
  • the switch module 600 may include a third switch unit 610, refer to FIG. 11 .
  • the third switch unit 610 includes two first ends and four second ends, wherein the two first ends of the third switch unit 610 correspond one-to-one with the two antenna ports ANT1 and ANT1 of the first transceiver module 200 respectively.
  • ANT2 is connected; a second end of the third switch unit 610 is connected to the first antenna Ant1, the other second end of the third switch unit 610 is connected to the second antenna Ant2 through the receiving module 300, and another second end of the third switch unit 610 is connected to the second antenna Ant2.
  • the second end is connected to the round-emitting port SRS of the first MIMO receiving module 400, the antenna port MHB ANT of the first MIMO receiving module 400 is connected to the third antenna Ant3, and another second end of the third switching unit 610 is connected to the second
  • the round-emitting port SRS of the MIMO receiving module 500 is connected, and the antenna port MHB ANT of the second MIMO receiving module 500 is connected to the fourth antenna Ant4, so that the radio frequency system supports the SRS function of 1T4R.
  • the third switch unit 610 may be a DP4T switch, the contacts (1) and (2) of the DP4T switch serve as the two first ends of the third switch unit 610, and the contacts ( 3), (4), (5), and (6) serve as the four second terminals of the third switch unit 610 .
  • the contacts (1) and (2) of the DP4T switch are respectively connected to the two antenna ports ANT1 and ANT2 of the first receiving module 300, and the contact (3) of the DP4T switch is connected to the first antenna Ant1;
  • the contact (4) is connected to the transmitting port MHB TRX1 of the receiving module 300, the antenna port MHB ANT of the receiving module 300 is connected to the second antenna Ant2, and the contact (5) of the DP4T switch is connected to the first MIMO receiving module 400’s round shot
  • the port SRS is connected, the antenna port MHB ANT of the first MIMO receiving module 400 is connected with the third antenna Ant3, the contact (6) of the DP4T switch is connected with the round-emitting port SRS of the second MIMO receiving module 500, and the second MIMO receiving
  • the antenna port MHB ANT of the module 500 is connected to the fourth antenna Ant4.
  • the above radio frequency system can support the 4*4 MIMO function of the N1, N3, N7 and N41 frequency bands, and can also support the SRS function under the SA standard of the N1, N3, N7 and N41 frequency bands.
  • Channel0 path first antenna Ant1 ⁇ path3 ⁇ third switch unit 610 ⁇ path1 ⁇ antenna port ANT2 of the first transceiver module 200 ⁇ multi-channel selection switch 210 ⁇ N41 receiving channel (filter, switch, low noise amplifier) ⁇ RF transceiver device 100.
  • Channel1 path second antenna Ant2 ⁇ path7 ⁇ antenna port MHB ANT of receiving module 300 ⁇ N41 receiving path (filter, switch, low noise amplifier) ⁇ RF transceiver 100.
  • Channel2 path third antenna Ant3 ⁇ path8 ⁇ antenna port MHB ANT of the first MIMO receiving module 400 ⁇ first switching unit 410 ⁇ filtering unit 420 ⁇ second switching unit 430 ⁇ radio frequency transceiver 100.
  • Channel3 path fourth antenna Ant4 ⁇ path9 ⁇ antenna port MHB ANT of the second MIMO receiving module 500 ⁇ first switching unit 510 ⁇ filtering unit 520 ⁇ second switching unit 530 ⁇ radio frequency transceiver 100.
  • RF transceiver 100 high frequency transmit port MHB TRX14G HB RFIN of first transceiver module 200 ⁇ N41 transmit path (power amplifier PA, 4P4T#1 switch, filter) ⁇ multi-channel selection switch 210 ⁇ antenna port ANT2 ⁇ path2 ⁇ No.
  • the three switch units 610 ⁇ path3 ⁇ first antenna Ant1 realize the SRS function; the third switch unit 610 ⁇ path4 ⁇ transmit port MHB TRX1 of the receiving module 300 ⁇ SP7T switch 310 of the receiving module 300 ⁇ antenna port MHB ANT of the receiving module 300 ⁇ path7 ⁇ the second antenna Ant2, to realize the SRS function; from the third switch unit 610 ⁇ path5 ⁇ the round transmission port SRS of the first MIMO receiving module 400 ⁇ the first switching unit 410 ⁇ the antenna port MHB ANT of the first MIMO receiving module 400 ⁇ path8 ⁇ the third antenna Ant3, to realize the SRS function; the third switch unit 610 ⁇ path6 ⁇ the round transmission port SRS of the second MIMO receiving module 500 ⁇ the first switching unit 510 ⁇ the antenna port MHB ANT of the second MIMO receiving module 500 ⁇ path9 ⁇ The fourth antenna Ant4, realizes the SRS function.
  • Channel0', Channel1', Channel2', Channel3' in the table can be understood as SRS working paths respectively.
  • the first switch unit 410 in the first MIMO receiving module 400 and the second MIMO receiving module 500 is an SP4T switch, that is, based on the first MIMO receiving module shown in FIG. 4 400 and the second MIMO receiving module 500, the switch module 600 in the radio frequency system may include a fourth switch unit 620, a fifth switch unit 630 and a sixth switch unit 640.
  • the fourth switch unit 620 includes two ends and four second ends, wherein the two first ends of the fourth switch unit 620 are respectively connected to the two antenna ports ANT1 and ANT2 of the first transceiver module 200 in a one-to-one correspondence; A second end of the fourth switch unit 620 is connected to the first antenna Ant1, another second end of the fourth switch unit 620 is connected to the second antenna Ant2 via the receiving module 300, and another second end of the fourth switch unit 620
  • the fifth switch unit 630 is connected to the third antenna Ant3, and another second end of the fourth switch unit 620 is connected to the fourth antenna Ant4 through the sixth switch unit 640; wherein, the fifth switch unit 630 is also arranged in the fourth MIMO
  • the receiving channel is connected to the first MIMO receiving module 400
  • the sixth switching unit 640 is further arranged on the fourth MIMO receiving channel and is connected to the second MIMO receiving module 500 .
  • the fourth switch unit 620 may be a DP4T switch, and the fifth switch unit 630 and the sixth switch unit 640 are both SPDT switches.
  • the contacts (1), (2) of the DP4T switch serve as the two first ends of the fourth switch unit 620, and the contacts (3), (4), (5), (6) of the DP4T switch serve as the fourth Four second terminals of the switch unit 620 .
  • the contacts (1) and (2) of the DP4T switch are respectively connected to the two antenna ports ANT1 and ANT2 of the first receiving module 300, and the contact (3) of the DP4T switch is connected to the first antenna Ant1;
  • the contact (4) is connected to the transmitting port MHB TRX1 of the receiving module 300, the antenna port MHB ANT of the receiving module 300 is connected to the second antenna Ant2, the contact (5) of the DP4T switch is connected to the contact (2) of the SPDT switch #1 ) connection, the contact point (3) of SPDT switch #1 is connected with the antenna port MHB ANT of the first MIMO receiving module 400, the contact point (1) of SPDT switch #1 is connected with the third antenna Ant3, the contact point ( 6) Connect with the contact point (2) of SPDT switch #2, the contact point (3) of SPDT switch #2 is connected with the antenna port MHB ANT of the second MIMO receiving module 500, and the contact point (1) of SPDT switch #2 is connected with the antenna port MHB ANT of the second MIMO receiving module 500.
  • the fourth antenna Ant4 is connected
  • the above radio frequency system can support the 4*4 MIMO function of the N1, N3, N7 and N41 frequency bands, and can also support the SRS function under the SA standard of the N1, N3, N7 and N41 frequency bands.
  • Channel0 path first antenna Ant1 ⁇ path3 ⁇ fourth switch unit 620 ⁇ path1 ⁇ antenna port ANT2 of the first transceiver module 200 ⁇ multi-channel selection switch 210 ⁇ N41 receiving channel (filter, switch, low noise amplifier) ⁇ RF transceiver device 100.
  • Channel1 path second antenna Ant2 ⁇ path7 ⁇ antenna port MHB ANT of receiving module 300 ⁇ N41 receiving path (filter, switch, low noise amplifier) ⁇ RF transceiver 100.
  • Channel2 path third antenna Ant3 ⁇ path8 ⁇ SPDT switch #1 ⁇ path10 ⁇ antenna port MHB ANT of the first MIMO receiving module 400 ⁇ first switching unit 410 ⁇ filtering unit 420 ⁇ second switching unit 430 ⁇ RF transceiver 100.
  • Channel3 path fourth antenna Ant4 ⁇ path9 ⁇ SPDT switch #2 ⁇ path11 ⁇ antenna port MHB ANT of the second MIMO receiving module 500 ⁇ first switch unit 510 ⁇ filter unit 520 ⁇ second switch unit 530 ⁇ RF transceiver 100.
  • the MIMO working principle of N1, N3, and N7 is similar to that of N41, which is not repeated here; among them, the working paths of each frequency band are shown in Table 5.
  • N1/N3 N7/N41 Channel0 Path3->Path1 Path3->Path2 Channel1 Path7 Path7 Channel2 Path8->Path10 Path8->Path10 Channel3 Path9->Path11 Path9->Path11
  • the fourth switch unit 620 ⁇ path3 ⁇ the first antenna Ant1 implements the SRS function; the fourth switch unit 620 ⁇ path4 ⁇ transmit port MHB TRX1 of the receiving module 300 ⁇ SP7T switch 310 of the receiving module 300 ⁇ antenna port MHB of the receiving module 300 ANT ⁇ path7 ⁇ the second antenna Ant2, realize the SRS function; the fourth switch unit 620 ⁇ path5 ⁇ SPDT switch #1 ⁇ path8 ⁇ the third antenna Ant3, realize the SRS function; the fourth switch unit 620 ⁇ path6 ⁇ SPDT switch# 2 ⁇ The fourth antenna Ant4, realizes the SRS function.
  • Channel0', Channel1', Channel2', Channel3' in the table can be understood as SRS working paths respectively.
  • the corresponding radio frequency system also only supports the SRS function under the SA standard. If the first transceiver module 200 in the embodiment of the present application can support the NSA standard and the SA standard, the corresponding radio frequency system can also support the SRS function under the NSA standard and the SA standard.
  • the radio frequency system shown in Figures 11 and 12 can support the 4*4 MIMO function of the N1, N3, N7 and N41 frequency bands, and can also support the SRS function under the SA standard of the N1, N3, N7 and N41 frequency bands.
  • the radio frequency system as shown in FIG. 11 by configuring the round-radiation port SRS in the first MIMO receiving module 400 and the second MIMO receiving module 500 , the number of switches in the switch module 600 can be reduced, for example, the number of switches in the switch module 600 can be reduced, for example, the number of switches in the switch module 600 can be reduced.
  • the fifth switch unit 630 and the sixth switch unit 640 in FIG. 12 the structure of the radio frequency system shown in FIG. 11 is simpler, and the wiring complexity in the radio frequency system is also simplified; the occupied area is small, which is beneficial to the radio frequency System miniaturization and cost reduction.
  • the radio frequency system in any of the foregoing embodiments may further include: a second transceiver module 700 , a first combiner 800 and a second combiner 900 .
  • the first combiner 800 is respectively connected with the second transceiver module 700, the switch module 600 and the second antenna Ant2; the second combiner 900 is connected with the receiving module 300 and the third antenna Ant3 respectively.
  • the second transceiver module 700 is connected to the first transceiver module 200 and is used to support the transceiver of radio frequency signals in multiple low frequency frequency bands.
  • the first transceiver module 200 may be used to support transceiver control of 4G signals in the low frequency band.
  • the first transceiver module 200 may be a low-frequency power amplifier PA module (Low Band Power Amplifier Modules including Duplexers With LNA, LLB-PA Mid) with a built-in low-noise amplifier.
  • PA module Low Band Power Amplifier Modules including Duplexers With LNA, LLB-PA Mid
  • Packaged chip which integrates multi-band transmit and receive channels, including B8, B12, B20, B26, and 2G LB and 2G HB GSM.
  • the radio frequency system in this example can not only support the 4*4 MIMO function of the N1, N3, N7 and N41 frequency bands, but also support the SRS function in the SA standard of the N1, N3, N7 and N41 frequency bands.
  • 200 and the first antenna Ant1 realize the transceiver control of B8, B12, B20, B26, as well as 2G LB and 2G HB GSM signals, expand the communication frequency band of the radio frequency system, and improve the communication performance of the radio frequency system.
  • An embodiment of the present application further provides a communication device, the communication device is provided with the radio frequency system in any of the above embodiments, and can support the 4*4 MIMO function of the N1, N3, N7 and N41 frequency bands, and can also support N1, SRS function in N3, N7 and N41 band SA standard.
  • the first MIMO receiving module 400 and the second MIMO receiving module 500 are only configured with four receiving channels to support the reception of 5G signals in four preset frequency bands, so that each receiving channel is utilized , the use efficiency of the first MIMO receiving module 400 and the second MIMO receiving module 500 is improved, the cost is reduced, and the link loss of the receiving path can also be reduced.

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Abstract

一种射频系统，其中，射频系统包括射频收发器(100)、第一收发模块(200)、接收模块(300)、第一MIMO接收模块(400)、第二MIMO接收模块(500)、第一天线(Ant1)、第二天线(Ant2)、第三天线(Ant3)和第四天线(Ant4)；射频收发器(100)经第一收发模块(200)与第一天线(Ant1)连接，构成5G信号的第一MIMO接收通道；射频收发器经接收模块(300)与第二天线(Ant2)连接，构成5G信号的第二MIMO接收通道；射频收发器(100)经第一MIMO接收模块(400)与第三天线(Ant3)连接，构成5G信号的第三MIMO接收通道；射频收发器(100)经第二MIMO接收模块(500)与第四天线(Ant4)连接，构成5G信号的第四MIMO接收通道。

Description

射频系统和通信设备
相关申请的交叉引用
本申请要求于2020年9月27日提交中国专利局、申请号为202011032759X发明名称为“射频系统和通信设备”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
本申请涉及射频技术领域，特别是涉及一种射频系统和通信设备。
背景技术
这里的陈述仅提供与本申请有关的背景信息，而不必然地构成现有示例性技术。
随着技术的发展和进步，为了应对日益增加的各种网络制式的需求，同时兼顾解决PCB布局紧张的问题，器件的高度集成化和小型化俨然成为了发展趋势。从最初仅支持单频段的Phase2产品，再到支持各制式集成的Phase7产品，器件的集成度越来越高，同时器件的封装尺寸也越来越小。当将该Phase7产品，例如，用于支持LTE信号中高频段的分集接收器件应用到射频收发系统中以支持5G NR信号的MIMO功能时，其成本高、占用空间大。
发明内容
根据本申请的各种实施例，提供一种射频系统和通信设备。
一种射频系统，包括：射频收发器、第一收发模块、接收模块、第一MIMO接收模块、第二MIMO接收模块、第一天线、第二天线、第三天线和第四天线；其中，
所述射频收发器经所述第一收发模块与所述第一天线连接，构成5G信号的第一MIMO接收通道；
所述射频收发器经所述接收模块与所述第二天线连接，构成5G信号的第二MIMO接收通道；其中，所述第一收发模块、接收模块均至少配置有四路接收通路，用于支持对四个预设频段的5G信号的接收；
所述射频收发器经所述第一MIMO接收模块与所述第三天线连接，构成5G信号的第三MIMO接收通道；
所述射频收发器经所述第二MIMO接收模块与所述第四天线连接，构成5G信号的第四MIMO接收通道；其中，所述第一MIMO接收模块和第二MIMO接收模块均配置有四路接收通路，用于支持对四个预设频段的5G信号的接收。
一种通信设备，包括如上述的射频系统。
上述射频系统和通信设备，通过第一收发模块、接收模块、第一MIMO接收模块和第二MIMO接收模块以及四个天线可以构成四个MIMO接收通道，进而使得该射频系统可支持四个预设频段的5G信号的4*4MIMO功能，进而满足海内外的通信需求，同时，该第一MIMO接收模块和第二MIMO接收模块均仅配置有四路接收通路，以用于支持对四个预设频段的5G信号的接收，使得每一路接收通路均得到了利用，提高了第一MIMO接收模块和第二MIMO接收模块的使用效率，降低了成本，相对于支持LTE信号中高频段的分集接收器件，还可以减小器件占用的空间，同时还可以减少接收通路的链路损耗。
本申请的一个或多个实施例的细节在下面的附图和描述中提出。本申请的其他特征、目的和优点将从说明书、附图以及权利要求书变得明显。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为一实施例的射频系统的框架示意图之一；
图2为一实施例的第一MIMO接收模块的示意图之一；
图3为一实施例的第一MIMO接收模块的示意图之二；
图4为一实施例的第一MIMO接收模块的示意图之三；
图5为一实施例的第一MIMO接收模块的示意图之四；
图6a为图4中第一MIMO接收模块的引脚示意图；
图6b为图4中第一MIMO接收模块的封装结构示意图；
图7a为图5中第一MIMO接收模块的引脚示意图；
图7b为图5中第一MIMO接收模块的封装结构示意图；；
图8为一实施例的射频系统的架构示意图之二；
图9为一实施例的第一收发模块的框架示意图；
图10为一实施例的接收模块的框架示意图；
图11为一实施例的射频系统的框架示意图之三；
图12为一实施例的射频系统的框架示意图之四；
图13为一实施例的射频系统的框架示意图之五；
图14为一实施例的射频系统的框架示意图之六。
具体实施方式
为了使本申请的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本申请进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本申请，并不用于限定本申请。
可以理解，本申请所使用的术语“第一”、“第二”等可在本文中用于描述各种元件，但这些元件不受这些术语限制。这些术语仅用于将第一个元件与另一个元件区分。举例来说，在不脱离本申请的范围的情况下，可以将第一收发模块称为第二收发模块，且类似地，可将第二收发模块称为第一收发模块。第一收发模块和第二收发模块两者都是收发模块，但其不是同一收发模块。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本申请的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。在本申请的描述中，“若干”的含义是至少一个，例如一个，两个等，除非另有明确具体的限定。
本申请实施例涉及的射频系统可以应用到具有无线通信功能的通信设备，其通信设备可以为手持设备、车载设备、可穿戴设备、计算设备或连接到无线调制解调器的其他处理设备，以及各种形式的用户设备(User Equipment，UE)(例如，手机)，移动台(Mobile Station，MS)等等。为方便描述，上面提到的设备统称为通信设备。网络设备可以包括基站、接入点等。
如图1所示，本申请实施例提供一种射频系统。该射频系统可以支持4*4MIMO功能。其中，MIMO功能指在发射端口和接收端口分别使用多个发射天线和接收天线，充分利用空间资源，通过多个天线实现多发多收，在不增加频谱资源和天线发射功率的情况下，可以成倍的提高系统信道容量。其中，通信设备和基站可以构成2*2MIMO或者4*4MIMO， 以4*4MIMO为例，接收通路天线端口的配置如表1所示。需要说明的是，在泰尔协议测试接收性能时，也是将4个接收通道全部连接到射频收发器。4个通道构成MIMO的下行，全部接收上行基站发出的信号，提高射频系统的性能。
表1接收天线端口配置
通道 Channel0 Channel1 Channel2 Channel3
天线端口 PRX DRX PRX MIMO DRX MIMO
表中，Channel0、Channel1、Channel2、Channel3可以一一对应理解为第一MIMO接收通道、第二MIMO接收通道、第三MIMO接收通道、第四MIMO接收通道，其中，天线端口PRX(主集接收端口)可以理解为第一收发模块的天线端口；天线端口DRX(分集接收端口)可以理解为接收模块的天线端口；天线端口PRX MIMO(主集MIMO接收端口)可以理解为第一MIMO接收模块的天线端口；天线端口DRX MIMO(分集MIMO接收端口)可以理解为第二MIMO接收模块的天线端口。
目前中国移动5G频段主要为N41，因此，通信设备均支持N41频段的MIMO。而本申请实施例中的射频系统除了可以支持N41频段的MIMO，还可以同时支持国外运营商针对N1、N3、和N7等频段的4*4MIMO。
在其中一个实施例中，射频系统包括：射频收发器100、第一收发模块200、接收模块300、第一MIMO接收模块400、第二MIMO接收模块500、第一天线Ant1、第二天线Ant2、第三天线Ant3和第四天线Ant4。
第一天线Ant1、第二天线Ant2、第三天线Ant3和第四天线Ant4可以用于支持不同频段的射频信号的接收和发射。该射频信号可以包括5G信号、4G信号、3G信号和2G信号等。第一天线Ant1、第二天线Ant2、第三天线Ant3和第四天线Ant4可以使用任何合适类型的天线形成。例如，第一天线Ant1、第二天线Ant2、第三天线Ant3和第四天线Ant4可以包括由以下天线结构形成的具有谐振元件的天线：阵列天线结构、环形天线结构、贴片天线结构、缝隙天线结构、螺旋形天线结构、带状天线、单极天线、偶极天线中的至少一种等。不同类型的天线可以用于不同的频段和频段组合。在本申请实施例中，对第一天线Ant1、第二天线Ant2、第三天线Ant3和第四天线Ant4的类型不做进一步的限定。
第一收发模块200可至少配置四条接收通路，以支持对四个预设频段的5G信号的接收。在其中一个实施例中，该第一收发模块200可以为一个集成器件，例如，可以为内置低噪放的中高频功率放大器模块(Middle and High Band Power Amplifier Modules including Duplexers With LNA，MHB L-PA Mid)，也即射频L-PA Mid器件。该第一收发模块200还可以支持对多个不同频段的中频信号和高频信号的接收和发射。
接收模块300也至少配置有四条接收通路，以用于支持对四个预设频段的5G信号的接收。在其中一个实施例中，该接收模块300可以为一个集成器件，例如，可以为分集接收(Diversity Receive，DRX)模块，也即射频DRX器件。该接收模块300还可以支持对多个不同频段的低频信号、中频信号和高频信号的接收。
其中，第一收发模块200和接收模块300中均配置的四条接收通路也可以实现对多个中高频频段的4G LTE信号的接收控制。例如，可以实现对频段B1、B3、B7、B41的信号的接收控制。其中，部分4G LTE信号与5G NR信号的频段(例如，N1、N3、N7、N41)范围相同，也即，该第一收发模块200可以实现对部分5G NR信号的接收控制。其中，5G NR信号和4G LTE信号的关系如表2所示，其中，5G NR信号频段N1、N3、N7、N41的接收通道分别一一对应与4G LTE信号频段B1、B3、B7、B41的接收通道共用。
表2 4G LTE和5G NR基本信息
Figure PCTCN2021105365-appb-000001
Figure PCTCN2021105365-appb-000002
可以理解的是，第一收发模块200、接收模块300中配置的四条接收通路为可以实现对B1、B3、B7、B41、N1、N3、N7、N41的接收控制，其中，B1和N1共用同一接收通路，例如，B1接收通路；B3和N3共用同一接收通路，例如，B3接收通路；B7和N7共用同一接收通路，例如，B7接收通路；B41和N41共用同一接收通路，例如，B41接收通路。
射频收发器100经第一收发模块200与第一天线Ant1连接，构成5G信号的第一MIMO接收通道，该第一MIMO接收通道可以支持对四个预设频段的5G信号的接收。射频收发器100经接收模块300与第二天线Ant2连接，构成5G信号的第二MIMO接收通道，该第二MIMO接收通道可以支持对四个预设频段的5G信号的接收。射频收发器100经第一MIMO接收模块400与第三天线Ant3连接，构成5G信号的第三MIMO接收通道；射频收发器100经第二MIMO接收模块500与第四天线Ant4连接，构成5G信号的第四MIMO接收通道。其中，第一MIMO接收通道和第二MIMO接收通道均可包括B1接收通路、B3接收通路、B7接收通路、B41接收通路这四个子接收通路。
第一MIMO接收模块400和第二MIMO接收模块500均配置有四路接收通路，用于支持对四个预设频段的5G信号的接收。例如，第一MIMO接收模块400和第二MIMO接收模块500均配置的四路接收通路可分别为N1接收通路、N3接收通路、N7接收通路、N41这四个子接收通路，可用于支持对N1、N3、N7、N41这四个5G频段的接收。
上述射频系统，通过第一收发模块200、接收模块300、第一MIMO接收模块400和第二MIMO接收模块500以及四个天线可以构成四个MIMO接收通道，进而使得该射频系统可支持四个预设频段的5G信号的4*4MIMO功能，进而满足海内外的通信需求，同时，该第一MIMO接收模块400和第二MIMO接收模块500均仅配置有四路接收通路，以用于支持对四个预设频段的5G信号的接收，使得每一路接收通路均得到了利用，提高了第一MIMO接收模块400和第二MIMO接收模块500的使用效率，降低了成本，相对于支持LTE信号中高频段的分集接收器件，还可以减小器件占用的空间，同时还可以减少接收通路的链路损耗。
在其中一个实施例中，第一MIMO接收模块400、第二MIMO接收模块500均被配置有天线端口MHB ANT和四个接收端口LNA OUT(1、2、3、4)。其中，第一MIMO接收模块400、第二MIMO接收模块500均包括：第一开关单元和四个滤波单元。如图2所示，以第一MIMO接收模块400为例进行说明。第一MIMO接收模块400包括：第一开关单元410和四个滤波单元420。其中，第一开关单元410包括第一端和四个第二端，其中，第一端与天线端口MHB ANT连接，第一开关单元410的各第二端分别经一滤波单元420与一接收端口LNA OUT连接，用于导通天线端口MHB ANT与任一接收端口LNA OUT之间的接收通路。也即，该滤波单元420设置在各接收通路上，用于对接收的5G信号进行滤波处理，且各滤波单元420输出的5G信号的频段各不相同。
在其中一个实施例中，滤波单元420可对应包括一个滤波器，该滤波器仅允许预设频段的5G信号通过。若多个频段的5G信号包括N1、N3、N7、N41这四个不同频段，其可对应设置四个滤波单元420(也即，四个滤波器)，以实现对着四个5G信号的滤波处理。该射频系统可以通过控制第一开关单元410的通断状态，以使多个频段的5G信号导通至任一滤波单元420。具体的，滤波器可以为带通滤波器、高通滤波器等。需要说明的是，在本申请实施例中，对每个滤波单元420中的滤波器的类型不做进一步的限定，可以根据 待滤波处理的5G信号的频段来选择合适的滤波器。
在其中一个实施例中，第一开关单元410为SP4T开关，四个滤波单元420可分别记为第一滤波单元420、第二滤波单元420、第三滤波单元420和第四滤波单元420。具体的，该SP4T开关的触点(1)作为该第一开关单元410的第一端与天线端口MHB ANT连接，该SP4T开关的触点(2)、(3)、(4)、(5)可作为该第一开关单元410的四个第二端。其中，该天线端口MHB ANT经触点(1)、触点(2)、第一滤波单元420与一接收端口LNA OUT1连接，以构成N1接收通路；该天线端口MHB ANT经触点(1)、触点(3)、第二滤波单元420与另一接收端口LNA OUT2连接，以构成N3接收通路；该天线端口MHB ANT经触点(1)、触点(2)、第三滤波单元420与再一接收端口LNA OUT3连接，以构成N7接收通路；该天线端口MHB ANT经触点(1)、触点(2)、第四滤波单元420与再一接收端口LNA OUT4连接，以构成N41接收通路。
可选的，该第一开关单元410还可以包括多个SPDT开关，可以通过分时控制多个SPDT开关以在同一时刻能够导通N1、N3、N7和N41接收通路中的任一路。
需要说明的是，在本申请实施例中，对第一开关单元410的具体组成形式不做进一步的限定，可以根据实际需求来设定。同时，第一MIMO接收模块400、第二MIMO接收模块500的结构可以完全相同，也可以不同。
本实施例中，第一MIMO接收模块400、第二MIMO接收模块500中仅配置有四个接收通路，例如，N1接收通路、N3接收通路、N7接收通路和N41接收通路，以适用于支持对N1、N3、N7和N41这四个频段的5G信号的接收，进而可以使该射频系统支持多频段的5G信号的4*4MIMO功能。
在其中一个实施例中，第一MIMO接收模块400、第二MIMO接收模块500均被配置有天线端口MHB ANT、轮射端口SRS以及四个接收端口LNA OUT。如图3所示，以第一MIMO接收模块400为例进行说明，其中，第一开关单元410可包括第一端和五个第二端。在其中一个实施例中，第一开关单元410可以为SP5T开关。具体的，该SP5T开关的触点(1)作为该第一开关单元410的第一端与天线端口MHB ANT连接，该SP4T开关的触点(2)、(3)、(4)、(5)、(6)可作为该第一开关单元410的四个第二端。其中，该天线端口MHB ANT经触点(1)、触点(2)、第一滤波单元420与一接收端口LNA OUT1连接，以构成N1接收通路；该天线端口MHB ANT经触点(1)、触点(3)、第二滤波单元420与另一接收端口LNA OUT2连接，以构成N3接收通路；该天线端口MHB ANT经触点(1)、触点(2)、第三滤波单元420与再一接收端口LNA OUT3连接，以构成N7接收通路；该天线端口MHB ANT经触点(1)、触点(2)、第四滤波单元420与再一接收端口LNA OUT4连接，以构成N41接收通路。其中，轮射端口SRS经触点(6)、触点(1)与天线端口MHB ANT连接，以构成发射通路。其中，该轮射端口SRS可以与前述实施例中的第一收发模块200连接，用于接收第一收发模块200发射的各频段的5G信号，以将接收的5G信号经过该发射通路传输至与该天线端口MHB ANT连接的天线，以实现对5G信号的发射。
在其中一个实施例中，第一MIMO接收模块400、第二MIMO接收模块500还包括第二开关单元430。如图4和图5所示，以第一MIMO接收模块400为例进行说明，第一MIMO接收模块400的第二开关单元430包括四个第一端和四个第二端，其中，四个第一端分别一一对应与四个滤波单元420连接，四个第二端分别一一对应与四个接收端口LNA OUT(1、2、3、4)连接。示例性的，该第二开关单元430可以为4P4T开关，通过控制该开关可以灵活的控制该第一MIMO接收模块400、第二MIMO接收模块500输出N1、N3、N7和N41这四个频段中的至少一个的5G信号至射频收发器100。
在其中一个实施例中，该第一MIMO接收模块400、第二MIMO接收模块500还包括控制单元。如图4和图5所示，以第一MIMO接收模块400为例进行说明，第一MIMO 接收模块400的控制单元440可分别与第一开关单元410、第二开关单元430连接，可用于控制第一开关单元410、第二开关单元430号以选择导通任一接收通路。具体的，控制单元440可以为移动行业处理器接口(Mobile Industry Processor Interface，MIPI)—射频前端控制接口(RF Front End Control Interface，RFFE)控制单元或射频前端控制接口(RF Front End Control Interface，RFFE)控制单元，其符合RFFE总线的控制协议。当控制单元为MIPI-RFFE控制单元时，其第一MIMO接收模块400、第二MIMO接收模块500还被配置有时钟信号的输入引脚CLK、单/双向数据信号的输入或双向引脚SDATAS、电源引脚VDD、参考电压引脚VIO等等。
在其中一个实施例中，第一MIMO接收模块400、第二MIMO接收模块500中的第一开关单元、四个滤波单元、第二开关单元以及控制单元都可以集成在同一器件中，形成一个5G NR DRX器件。也即，该第一MIMO接收模块400可以理解为第一5G NR DRX器件，第二MIMO接收模块500可以理解为第二5G NR DRX器件。示例性的，以第一MIMO接收模块400为例进行说明。基于如图4所示的5G NR DRX器件中的各个器件均可集成封装在同一封装模组中，如图6a所示，该第一MIMO接收模块400(封装芯片)中的各个引脚与第一MIMO接收模块400配置的多个端口一一对应。通过封装集成，第一MIMO接收模块400的封装规格如图6b所示。相应的，基于如图5所示的MIMO接收模块300中的各个器件均可集成封装在同一封装模组中，如图7a所示，该第一MIMO接收模块400(封装芯片)中的各个引脚与第一MIMO接收模块400配置的多个端口一一对应。通过封装集成，第一MIMO接收模块400的封装规格如图7b所示。
本申请实施例中的第一MIMO接收模块400和第二MIMO接收模块500的集成度高，可以减小各器件所占用的空间，便于第一MIMO接收模块400和第二MIMO接收模块500的小型化，同时，还可以节约成本，提供各器件的利用率。
基于如图8所示的射频系统，简述N41频段的4*4MIMO的MIMO工作路径(例如，Channel0路径、Channel1、Channel2和Channel3)的接收控制：
Channel0路径：第一天线Ant1→第一收发模块200的天线端口ANT2→N41接收通路→射频收发器100。
Channel1路径：第二天线Ant2→接收模块300的天线端口MHB ANT→N41接收通路→射频收发器100。
Channel2路径：第三天线Ant3→第一MIMO接收模块400的天线端口MHB ANT→第一开关单元410→滤波单元420→第二开关单元430→射频收发器100。
Channel3路径：第四天线Ant4→第二MIMO接收模块500的天线端口MHB ANT→第一开关单元510→滤波单元520→第二开关单元530→射频收发器100。
其中，N1、N3、N7的MIMO工作原理与N41类似，这里不再详细叙述。
上述实施例中的射频系统，其可以支持N1、N3、N7和N41这四个频段的4*4MIMO，同时，该第一MIMO接收模块400和第二MIMO接收模块500均仅配置有四路接收通路，以用于支持对四个预设频段的5G信号的接收，使得每一路接收通路均得到了利用，提高了第一MIMO接收模块400和第二MIMO接收模块500的使用效率，降低成本，同时还可以减少接收通路的链路损耗。
如图9所示，在其中一个实施例中，第一收发模块200还被配置有多路发射通道，用于支持多个预设频段的5G信号的发射。其中，该多路发射通路和多路接收通路可以相对应设置，具体的，多路发射通路可以实现对B1、B3、B7、B41、N1、N3、N7、N41的发射控制，其中，B1和N1共用同一发射通路，例如，B1发射通路；B3和N3共用同一发射通路，例如，B3发射通路；B7和N7共用同一发射通路，例如，B7发射通路；B41和N41共用同一发射通路，例如，B41发射通路。在其中一个实施例中，该第一收发模块200中配置有一个多通道选择开关，以选择切换该第一收发模块200中的任一发射通路或任一 发射通路。
在其中一个实施例中，该第一收发模块200中配置两个天线端口ANT1、ANT2，每个天线端口ANT1、ANT2用于传输不同频段的4G/5G信号。示例性的，B1/N1、B3/N3频段的4G/5G信号可通过天线端口ANT1传输，其B7/N7、B41/N41频段的4G/5G信号可通过天线端口ANT2传输。该多通道选择开关210可包括两个第一端和多个第二端。其中，多通道选择开关210的两个第一端可分别一一对应与第一收发模块200的两个天线端口ANT1、ANT2对应连接，该多通道选择开关210的多个第二端可对应与该多路发射通路和多路接收通路连接，以实现对多个预设频段的4G/5G信号的收发控制。
在其中一个实施例中，各发射通路中可包括功率放大器PA、滤波器、射频开关等器件，以实现对不同频段的4G/5G信号的放大、滤波以及切换发射控制。各接收通路中可包括射频开关、滤波器和低噪声放大器等，以对天线端口MHB ANT接收的不同频段的4G/5G信号的放大、滤波以及切换接收控制。
在其中一个实施例中，第一收发模块200还用于收发其他中高频频段的4G信号。具体的，第一收发模块200还可以用于实现对B25、B30、B32、B66、B39等频段的4G信号的收发控制。
如图10所示，在其中一个实施例中，接收模块300被配置有天线端口MHB ANT、发射端口MHB TRX1，其中，接收模块300包括第七开关单元310和多个接收电路，其中，第七开关单元310包括第一端和多个第二端，第七开关单元310的第一端与天线端口MHB ANT连接，第七开关单元310的部分第二端分别一一对应与多个接收电路连接，第七开关单元310单的另一第二端与发射端口MHB TRX1连接。各接收电路可包括射频开关、滤波器和低噪声放大器等，以对天线端口MHB ANT接收的不同频段的4G/5G信号的放大、滤波以及切换接收控制。其中，第七开关单元310可以为SP7T开关。
在其中一个实施例中，该接收模块300还用于接收其他低中高频频段的4G信号。具体的，接收模块300还可以用于实现对B8、B26、B25、B39、B4、B34、B66、B40等频段的4G信号的收发控制。
射频系统反馈信道信息有预编码矩阵指示符(Precoding Matrix Indicator，PMI)和信道探测参考信号(Sounding Reference Signal，SRS)这两种不同的模式。从标准定义上看，PMI是所有5G通信设备必须支持的功能，SRS则是可选功能。PMI是基站通过一种预先设定的机制，依靠终端测量后辅以各种量化算法，来估计信道信息和资源要求，并上报给基站；而SRS则是利用信道互易性让包括射频系统的通信设备直接将信道信息上报给基站，显然后者更加精确。通信设备发送SRS信息即是用于基站探测终端位置和信道质量的方式；其中SRS天线轮发具体说明如下：
其一，1T1R：固定在第一天线Ant1向基站反馈信息，不支持SRS轮发；
其一，1T4R：在第一天线Ant1到第四天线Ant4轮流发射SRS信息，每次只选择一个天线发射，目前非独立组网采用这种模式；
其三，2T4R：在第一天线Ant1到第四天线Ant4轮流发射SRS信息，每次选择两个天线同时发射，目前独立组网采用这种模式。
在SRS模式下，能够参与发送参考信号的天线数量越多，信道估计就越准，进而能获得的速率越高；天线数量相同时，独立组网(Standalone，SA)模式比非独立组网(Non-Standalone，NSA)模式更快地完成信道估计，提高网络信道估计速度。
如图11和图12所示，在其中一个实施例中，基于如图9所示的第一收发模块200和如图10所示的接收模块300，射频系统还包括开关模块600。其中，开关模块600分别与第一收发模块200、接收模块300、第一MIMO接收模块400、第二MIMO接收模块500、第一天线Ant1、第二天线Ant2、第三天线Ant3和第四天线Ant4、第三天线Ant3、第四天线Ant4连接。其中，该开关模块600用于导通射频收发器100分别与第一天线Ant1、 第二天线Ant2、第三天线Ant3和第四天线Ant4之间的发射通路导通，以使射频系统支持1T4R的SRS功能，也即，可以使得该射频系统能够支持独立组网模式下的SRS功能。
在其中一个实施例中，当该第一MIMO接收模块400、第二MIMO接收模块500中的第一开关单元410为SP5T开关，且被配置有该轮射端口SRS时，其该射频系统对应的开关模块600可包括第三开关单元610，参考图11。其中，第三开关单元610包括两个第一端和四个第二端，其中，第三开关单元610的两个第一端分别一一对应与第一收发模块200的两个天线端口ANT1、ANT2连接；第三开关单元610的一第二端与第一天线Ant1连接，第三开关单元610的另一第二端经接收模块300与第二天线Ant2连接，第三开关单元610的再一第二端与第一MIMO接收模块400的轮射端口SRS连接，第一MIMO接收模块400的天线端口MHB ANT与第三天线Ant3连接，第三开关单元610的又一第二端经与第二MIMO接收模块500的轮射端口SRS连接，第二MIMO接收模块500的天线端口MHB ANT与第四天线Ant4连接，以使射频系统支持1T4R的SRS功能。
在其中一个实施例中，第三开关单元610可以为DP4T开关，该DP4T开关的触点(1)、(2)作为第三开关单元610的两个第一端，该DP4T开关的触点(3)、(4)、(5)、(6)作为第三开关单元610的四个第二端。其中，DP4T开关的触点(1)、(2)分别对应与第一接收模块300的两个天线端口ANT1、ANT2连接，DP4T开关的触点(3)与第一天线Ant1连接；DP4T开关的触点(4)与接收模块300的发射端口MHB TRX1连接，该接收模块300的天线端口MHB ANT与第二天线Ant2连接，DP4T开关的触点(5)与第一MIMO接收模块400的轮射端口SRS连接，该第一MIMO接收模块400的天线端口MHB ANT与第三天线Ant3连接，DP4T开关的触点(6)与第二MIMO接收模块500的轮射端口SRS连接，该第二MIMO接收模块500的天线端口MHB ANT与第四天线Ant4连接。
上述射频系统，可以支持N1、N3、N7和N41频段的4*4MIMO功能，同时还可以支持N1、N3、N7和N41频段SA制式下的SRS功能。基于如图11所示的射频系统，分析N41RX MIMO的Channel0、Channel1、Channel2、Channel3的路径的工作原理，具体如下：
Channel0路径：第一天线Ant1→path3→第三开关单元610→path1→第一收发模块200的天线端口ANT2→多通路选择开关210→N41接收通路(滤波器、开关、低噪声放大器)→射频收发器100。
Channel1路径：第二天线Ant2→path7→接收模块300的天线端口MHB ANT→N41接收通路(滤波器、开关、低噪声放大器)→射频收发器100。
Channel2路径：第三天线Ant3→path8→第一MIMO接收模块400的天线端口MHB ANT→第一开关单元410→滤波单元420→第二开关单元430→射频收发器100。
Channel3路径：第四天线Ant4→path9→第二MIMO接收模块500的天线端口MHB ANT→第一开关单元510→滤波单元520→第二开关单元530→射频收发器100。
其中，N1、N3、N7的MIMO工作原理与N41类似，在此，不再赘述；其中，各频段的工作路径如表3所示。
表3 5G NR MIMO工作路径
  N1/N3 N7/N41
Channel0 Path3->Path1 Path3->Path2
Channel1 Path7 Path7
Channel2 Path8 Path8
Channel3 Path9 Path9
基于如图11所示的射频系统，简述N41频段SA制式的SRS工作原理：
射频收发器100→第一收发模块200的高频发射端口MHB TRX14G HB RFIN→N41发射通路(功率放大器PA、4P4T#1开关、滤波器)→多通道选择开关210→天线端口 ANT2→path2→第三开关单元610→path3→第一天线Ant1，实现SRS功能；由第三开关单元610→path4→接收模块300的发射端口MHB TRX1→接收模块300的SP7T开关310→接收模块300的天线端口MHB ANT→path7→第二天线Ant2，实现SRS功能；由第三开关单元610→path5→第一MIMO接收模块400的轮射端口SRS→第一开关单元410→第一MIMO接收模块400的天线端口MHB ANT→path8→第三天线Ant3，实现SRS功能；由第三开关单元610→path6→第二MIMO接收模块500的轮射端口SRS→第一开关单元510→第二MIMO接收模块500的天线端口MHB ANT→path9→第四天线Ant4，实现SRS功能。
其中，N1、N3、N7的SRS工作原理与N41类似，在此，不再赘述，相关的SRS工作路径如表4所示。
表4 SRS详细路径配置表
  N1/N3 N7/N41
Channel0’ Path1->Path3 Path2->Path3
Channel1’ Path1->Path4->Path7 Path2->Path4->Path7
Channel2’ Path1->Path5->Path8 Path2->Path5->Path8
Channel3’ Path1->Path6->Path9 Path2->Path6->Path9
其中，表中的Channel0’、Channel1’、Channel2’、Channel3’可分别理解为SRS工作路径。
参考图12，在其中一个实施例中，第一MIMO接收模块400和第二MIMO接收模块500中的第一开关单元410为SP4T开关，也即，基于如图4所示的第一MIMO接收模块400和第二MIMO接收模块500，该射频系统的中的开关模块600可包括第四开关单元620、第五开关单元630和第六开关单元640。其中，第四开关单元620包括两个端和四个第二端，其中第四开关单元620的两个第一端分别一一对应与第一收发模块200的两个天线端口ANT1、ANT2连接；第四开关单元620的一第二端与第一天线Ant1连接，第四开关单元620的另一第二端经接收模块300与第二天线Ant2连接，第四开关单元620的再一第二端经第五开关单元630与第三天线Ant3连接，第四开关单元620的又一第二端经第六开关单元640与第四天线Ant4连接；其中，第五开关单元630还设置在第四MIMO接收通道上，与第一MIMO接收模块400连接，第六开关单元640还设置在第四MIMO接收通道上，与第二MIMO接收模块500连接。
具体的，该第四开关单元620可以为DP4T开关，第五开关单元630和第六开关单元640均为SPDT开关。该DP4T开关的触点(1)、(2)作为第四开关单元620的两个第一端，该DP4T开关的触点(3)、(4)、(5)、(6)作为第四开关单元620的四个第二端。其中，DP4T开关的触点(1)、(2)分别对应与第一接收模块300的两个天线端口ANT1、ANT2连接，DP4T开关的触点(3)与第一天线Ant1连接；DP4T开关的触点(4)与接收模块300的发射端口MHB TRX1连接，该接收模块300的天线端口MHB ANT与第二天线Ant2连接，DP4T开关的触点(5)与SPDT开关#1的触点(2)连接，SPDT开关#1的触点(3)与第一MIMO接收模块400的天线端口MHB ANT连接，SPDT开关#1的触点(1)与第三天线Ant3连接，DP4T开关的触点(6)与SPDT开关#2的触点(2)连接，SPDT开关#2的触点(3)与第二MIMO接收模块500的天线端口MHB ANT连接，SPDT开关#2的触点(1)与第四天线Ant4连接。
上述射频系统，可以支持N1、N3、N7和N41频段的4*4MIMO功能，同时还可以支持N1、N3、N7和N41频段SA制式下的SRS功能。基于如图12所示的射频系统，分析N41RX MIMO的Channel0、Channel1、Channel2、Channel3的路径的工作原理，具体如下：
Channel0路径：第一天线Ant1→path3→第四开关单元620→path1→第一收发模块200 的天线端口ANT2→多通路选择开关210→N41接收通路(滤波器、开关、低噪声放大器)→射频收发器100。
Channel1路径：第二天线Ant2→path7→接收模块300的天线端口MHB ANT→N41接收通路(滤波器、开关、低噪声放大器)→射频收发器100。
Channel2路径：第三天线Ant3→path8→SPDT开关#1→path10→第一MIMO接收模块400的天线端口MHB ANT→第一开关单元410→滤波单元420→第二开关单元430→射频收发器100。
Channel3路径：第四天线Ant4→path9→SPDT开关#2→path11→第二MIMO接收模块500的天线端口MHB ANT→第一开关单元510→滤波单元520→第二开关单元530→射频收发器100。
其中，N1、N3、N7的MIMO工作原理与N41类似，在此，不再赘述；其中，各频段的工作路径如表5所示。
表5 5G NR MIMO工作路径
  N1/N3 N7/N41
Channel0 Path3->Path1 Path3->Path2
Channel1 Path7 Path7
Channel2 Path8->Path10 Path8->Path10
Channel3 Path9->Path11 Path9->Path11
基于如图12所示的射频系统，简述N41频段SA制式的SRS工作原理：
射频收发器100→第一收发模块200的高频发射端口MHB TRX14G HB RFIN→N41发射通路(功率放大器PA、4P4T#1开关、滤波器)→多通道选择开关210→天线端口MHB ANTANT2→path2→第四开关单元620→path3→第一天线Ant1，实现SRS功能；由第四开关单元620→path4→接收模块300的发射端口MHB TRX1→接收模块300的SP7T开关310→接收模块300的天线端口MHB ANT→path7→第二天线Ant2，实现SRS功能；由第四开关单元620→path5→SPDT开关#1→path8→第三天线Ant3，实现SRS功能；由第四开关单元620→path6→SPDT开关#2→第四天线Ant4，实现SRS功能。
其中，N1、N3、N7的SRS工作原理与N41类似，在此，不再赘述，相关的SRS工作路径如表6所示。
表6 SRS详细路径配置表
  N1/N3 N7/N41
Channel0’ Path1->Path3 Path2->Path3
Channel1’ Path1->Path4->Path7 Path2->Path4->Path7
Channel2’ Path1->Path5->Path8 Path2->Path5->Path8
Channel3’ Path1->Path6->Path9 Path2->Path6->Path9
其中，表中的Channel0’、Channel1’、Channel2’、Channel3’可分别理解为SRS工作路径。
需要说明的是，若本申请实施例中的第一收发模块200为MHB L-PA Mid器件，该器件仅支持SA制式，则对应射频系统也仅支持SA制式下的SRS功能。若本申请实施例中的第一收发模块200可支持NSA制式和SA制式，则对应射频系统也可以支持NSA制式和SA制式下的SRS功能。
基于如图11和12所示的射频系统均可以支持N1、N3、N7和N41频段的4*4MIMO功能，同时还可以支持N1、N3、N7和N41频段SA制式下的SRS功能。同时，如图11所示的射频系统中，通过在第一MIMO接收模块400和第二MIMO接收模块500中配置了轮射端口SRS，可以简少开关模块600中的开关数量，例如，可以省略如图12中的第五开关单元630和第六开关单元640，如图11所示的射频系统的结构更为简单，同时也简 化了射频系统中的布线复杂度；占用面积小，有利于射频系统的小型化以及降低了成本。
如图13和图14所示，在其中一个实施例中，前述任一实施例中的射频系统中还可以包括：第二收发模块700、第一合路器800和第二合路器900。第一合路器800，分别与第二收发模块700、开关模块600、第二天线Ant2连接；第二合路器900，分别与接收模块300、第三天线Ant3连接。
其中，第二收发模块700，与第一收发模块200连接，用于支持多个低频频段的射频信号的收发。具体的，该第一收发模块200可用于支持对低频频段的4G信号的收发控制。示例性的，第一收发模块200可以为内置低噪放的低频功率放大器PA模块(Low Band Power Amplifier Modules including Duplexers With LNA，LB L-PA Mid)，可以将该LB L-PA Mid理解为以封装芯片，其集成了多频段的发射和接收通道，包含B8、B12、B20、B26，以及2G LB和2G HB GSM。此外，还有4个AUX端口用于外置频段的扩展。
本实例中的射频系统，除了能支持N1、N3、N7和N41频段的4*4MIMO功能，同时还可以支持N1、N3、N7和N41频段SA制式下的SRS功能，还可以通过第一收发模块200和第一天线Ant1实现对B8、B12、B20、B26，以及2G LB和2G HB GSM信号的收发控制，拓展了该射频系统的通信频段，以及提高了该射频系统的通信性能。
本申请实施例还提供一种通信设备，该通信设备上设置有上述任一实施例中的射频系统，均可以支持N1、N3、N7和N41频段的4*4MIMO功能，同时还可以支持N1、N3、N7和N41频段SA制式下的SRS功能。同时，该第一MIMO接收模块400和第二MIMO接收模块500均仅配置有四路接收通路，以用于支持对四个预设频段的5G信号的接收，使得每一路接收通路均得到了利用，提高了第一MIMO接收模块400和第二MIMO接收模块500的使用效率，降低了成本，同时还可以减少接收通路的链路损耗。
以上实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对本申请专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。因此，本申请专利的保护范围应以所附权利要求为准。

Claims (17)

  1. 一种射频系统，包括：射频收发器、第一收发模块、接收模块、第一MIMO接收模块、第二MIMO接收模块、第一天线、第二天线、第三天线和第四天线；其中，
    所述射频收发器经所述第一收发模块与所述第一天线连接，构成5G信号的第一MIMO接收通道；
    所述射频收发器经所述接收模块与所述第二天线连接，构成5G信号的第二MIMO接收通道；其中，所述第一收发模块、接收模块均至少配置有四路接收通路，用于支持对四个预设频段的5G信号的接收；
    所述射频收发器经所述第一MIMO接收模块与所述第三天线连接，构成5G信号的第三MIMO接收通道；
    所述射频收发器经所述第二MIMO接收模块与所述第四天线连接，构成5G信号的第四MIMO接收通道；其中，所述第一MIMO接收模块和第二MIMO接收模块均配置有四路接收通路，用于支持对所述四个预设频段的5G信号的接收。
  2. 根据权利要求1所述的射频系统，其特征在于，所述第一MIMO接收模块、第二MIMO接收模块均被配置有天线端口和四个接收端口，其中，所述第一MIMO接收模块、第二MIMO接收模块均包括：第一开关单元和四个滤波单元，其中，所述第一开关单元包括第一端和多个第二端，其中，所述第一端与所述天线端口连接，至少部分各所述第二端分别经一所述滤波单元与一所述接收端口连接，其中，各所述滤波单元输出的射频信号的频段各不相同。
  3. 根据权利要求2所述的射频系统，其特征在于，所述第一开关单元为SP4T开关。
  4. 根据权利要求2所述的射频系统，其特征在于，所述第一MIMO接收模块、第二MIMO接收模块还均被配置有轮射端口，其中，所述第一开关单元的剩余所述第二端与所述轮射端口连接。
  5. 根据权利要求4所述的射频系统，其特征在于，所述第一开关单元为SP5T开关。
  6. 根据权利要求2所述的射频系统，其特征在于，所述第一MIMO接收模块、第二MIMO接收模块还均包括：
    第二开关单元，所述第二开关单元包括四个第一端和四个第二端，其中，四个第一端分别一一对应与所述四个滤波单元连接，所述四个第二端分别一一对应与所述四个接收端口连接。
  7. 根据权利要求6所述的射频系统，其特征在于，所述第二开关单元为4P4T开关。
  8. 根据权利要求1所述的射频系统，其特征在于，所述第一收发模块还被配置有多路发射通道，用于支持多个预设频段的5G信号的发射；其中，所述射频系统还包括开关模块，所述开关模块分别与所述第一收发模块、接收模块、第一MIMO接收模块、第二MIMO接收模块、第一天线、第二天线、第三天线、第四天线连接，所述开关模块用于导通所述射频收发器分别与所述第一天线、第二天线、第三天线、第四天线之间的发射通路导通，以使所述射频系统支持1T4R的SRS功能。
  9. 根据权利要求8所述的射频系统，其特征在于，所述第一MIMO接收模块、第二MIMO接收模块均被配置有天线端口和轮射端口，所述开关模块包括第三开关单元，其中，所述第三开关单元包括两个第一端和四个第二端，其中，所述第三开关单元的两个第一端分别一一对应与所述第一收发模块的两个天线端口连接；所述第三开关单元的一第二端与所述第一天线连接，所述第三开关单元的另一第二端经所述接收模块与所述第二天线连接，所述第三开关单元的再一第二端与所述第一MIMO接收模块的轮射端口连接，所述第一MIMO接收模块的天线端口与所述第三天线连接，所述第三开关单元的又一第二端经与所述第二MIMO接收模块的轮射端口连接，所述第二MIMO接收模块的天线端口与所述第四天线连接，以使所述射频系统支持1T4R的SRS功能。
  10. 根据权利要求8所述的射频系统，其特征在于，所述开关模块包括第四开关单元、第五开关单元和第六开关单元，其中，所述第四开关单元包括两个端和四个第二端，其中所述第四开关单元的两个第一端分别一一对应与所述第一收发模块的两个天线端口连接；所述第四开关单元的一第二端与所述第一天线连接，所述第四开关单元的另一第二端经所述接收模块与所述第二天线连接，所述第四开关单元的再一第二端经所述第五开关单元与所述第三天线连接，所述第四开关单元的又一第二端经所述第六开关单元与所述第四天线连接；其中，所述第五开关单元设置在所述第四MIMO接收通道上，与所述第一MIMO接收模块连接，所述第六开关单元设置在所述第四MIMO接收通道上，与所述第二MIMO接收模块连接。
  11. 根据权利要求10所述的射频系统，其特征在于，所述第五开关单元的两个第一端分别与所述第四开关单元、第一MIMO接收模块的天线端口一一对应连接，所述第五开关单元的第二端与所述第三天线连接；所述第六开关单元的两个第一端分别与所述第四开关单元、第二MIMO接收模块的天线端口一一对应连接，所述第六开关单元的第二端与所述第四天线连接。
  12. 根据权利要求9或10所述的射频系统，其特征在于，所述接收模块被配置有天线端口、发射端口，其中，所述接收模块包括第七开关单元和多个接收电路，其中，所述第七开关单元包括第一端和多个第二端，所述第七开关单元的第一端经所述天线端口与所述第二天线连接，所述第七开关单元的部分第二端分别一一对应与多个接收电路连接，所述第七开关单元单的另一第二端与所述发射端口连接。
  13. 根据权利要求8所述的射频系统，其特征在于，所述接收模块还用于支持多个低频频段的射频信号的接收；其中，所述射频系统还包括：
    第二收发模块，与所述射频收发器、第一收发模块连接，用于支持多个低频频段的射频信号的收发；
    第一合路器，分别与所述第二收发模块、开关模块、第一天线连接；
    第二合路器，分别与所述接收模块、第二天线连接。
  14. 根据权利要求13所述的射频系统，其特征在于，所述接收模块配置有两个天线端口，其中一所述天线端口用于接收低频频段的射频信号，另一所述天线端口用于接收预设频段的5G信号，其中，
    所述第一合路器的两个第一端分别与所述第二收发模块、开关模块连接，所述第一合路器的第二端与所述第一天线连接；
    所述第二合路器的两个第一端分别与所述接收模块的两个天线端口一一对应连接，所述第二合路器的第二端与所述第二天线连接。
  15. 根据权利要求1所述的射频系统，其特征在于，所述四个预设频段包括N1、N3、N7和N41。
  16. 根据权利要求1所述的射频系统，其特征在于，所述第一MIMO接收模块、第二MIMO为5G NR DRX器件。
  17. 一种通信设备，包括如权利要求1-16任一项所述的射频系统。
PCT/CN2021/105365 2020-09-27 2021-07-09 射频系统和通信设备 Ceased WO2022062575A1 (zh)

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