CN106921405A - A kind of radio frequency front-end device - Google Patents

Abstract

The present invention provides a radio frequency front-end device, wherein the first frequency band signal transmitting pin of the first radio frequency transceiver in the radio frequency front-end device, the first PA, the first band-pass filter and the first end of the first switch are sequentially Connection; the receiving pin of the main set signal of the first frequency band and the receiving pin of the diversity signal of the second frequency band are respectively connected with the first double filter, and the first double filter is connected with the second end of the first switch; the control end of the first switch , the first radio frequency connector and the first antenna are connected in sequence; the second frequency band signal transmitting pin, the second PA, the second bandpass filter and the first end of the second switch are connected in sequence; the second frequency band main set signal The receiving pin and the first frequency band diversity signal receiving pin are respectively connected to the second double filter, and the second double filter is connected to the second end of the second switch; the control end of the second switch, the second radio frequency connector, the second The two antennas are connected in sequence, and the RF front-end device can reduce the PCB layout area and design complexity.

Description

A radio frequency front-end device

technical field

The invention relates to the technical field of communications, in particular to a radio frequency front-end device.

Background technique

With the rapid development of global LTE networks, more and more countries are developing LTE services. However, due to the large number of LTE frequency bands, some operators allocate narrow frequency bands, so CA (Carrier Aggregation, Carrier Aggregation) technology came into being. In order to integrate the fragmented spectrum and increase the rate of data services.

According to the frequency band, CA can be divided into two types: intra-band CA and inter-band CA; according to the sending and receiving mode, it can be divided into uplink CA and downlink CA. For example, 2UL CA (2-band inter-band uplink CA) refers to simultaneous transmission of two frequency bands, and 2DL CA (2-band inter-band downlink CA) refers to simultaneous reception of two frequency bands. Two-band uplink and downlink inter-band CA refers to simultaneous reception and transmission of two frequency bands.

As shown in Figure 1, it is a schematic diagram of the structure of the existing TDD (Time Division Duplex, time division duplex) CA RF front-end device between the uplink and downlink bands. This solution uses three antennas, and ANT0 (antenna 0) realizes the main receiver of frequency band A and transmit; ANT1 (antenna 1) realizes the main set reception and transmission of frequency band B; ANT2 (antenna 2) realizes the diversity reception of frequency band A and frequency band B. The three antenna paths can work at the same time, and can complete the uplink and downlink inter-band CA combination of frequency band A and frequency band B. Among them, PA (poweramplifier, power amplifier), PRX (Primarily Receiver, main set receiving), DRX (Diversity Receiver, diversity receiving), TX (TransmitXmt, transmitting), RX (ReceiverXmt, receiving), TR (Transceiver, radio frequency transceiver).

FIG. 2 is a structural schematic diagram of an existing TDD radio frequency front-end device implementing uplink and downlink interband CA. This solution uses three antennas. ANT0 (antenna 0) realizes the transmission of frequency band A and the main set reception of frequency band A and frequency band B; ANT1 (antenna 1) realizes the transmission of frequency band B; ANT2 (antenna 2) realizes the diversity reception of frequency band A and frequency band B. The three antenna paths can work at the same time, and the uplink and downlink inter-band CA combination of frequency band A and frequency band B can be completed.

FIG. 3 is a schematic structural diagram of an existing FDD (Frequency Division Duplex, Frequency Division Duplex) radio frequency front-end device for realizing CA between uplink and downlink bands. This solution uses three antennas. ANT0 (antenna 0) realizes the main set reception and transmission of frequency band A; ANT1 (antenna 1) realizes the main set reception and transmission of frequency band B; ANT2 (antenna 2) realizes the diversity reception of frequency band A and frequency band B, and the three antenna channels can be simultaneously After working, the uplink and downlink inter-band CA combination of frequency band A and frequency band B can be completed.

It can be seen that although the existing three schemes can realize uplink and downlink CA between two frequency bands (TDD or FDD), all three schemes use three antennas and three switches, and the PCB layout area is large and the design is complicated. Both human design cost and hardware cost are high.

Contents of the invention

The present invention provides a radio frequency front-end device to solve the problems of large PCB layout area and high design complexity caused by the need to use three antennas and three switches in the existing inter-band uplink and downlink CA solutions.

In the first aspect, a radio frequency front-end device is provided, wherein the device includes: a first radio frequency transceiver, a first PA, a second PA, a first switch, a second switch, a first bandpass filter, a second bandpass pass filter, a first double filter, a second double filter, a first radio frequency connector, a second radio frequency connector, a first antenna and a second antenna; the first radio frequency transceiver includes: first frequency band signal transmission Pins, second frequency band signal transmitting pins, first frequency band main set signal receiving pins, first frequency band diversity signal receiving pins, second frequency band main set signal receiving pins, and second frequency band diversity signal receiving pins;

The first frequency band signal transmitting pin, the first PA, the first bandpass filter, and the first end of the first switch are sequentially connected; the first frequency band main set signal receiving pin, The receiving pins of the second frequency band diversity signal are respectively connected to the first double filter, and the first double filter is connected to the second end of the first switch; the control end of the first switch, the second end of the first switch, A radio frequency connector and the first antenna are connected in sequence;

The second frequency band signal transmitting pin, the second PA, the second bandpass filter, and the first end of the second switch are sequentially connected; the second frequency band main set signal receiving pin, The first frequency band diversity signal receiving pins are respectively connected to the second double filter, and the second double filter is connected to the second end of the second switch; the control end of the second switch, the first The two radio frequency connectors and the second antenna are connected in sequence.

In a second aspect, a radio frequency front-end device is provided, wherein the device includes: a second radio frequency transceiver, a third PA, a fourth PA, a third switch, a fourth switch, a first frequency band filter, a second frequency band filter device, a third radio frequency connector, a fourth radio frequency connector, a third antenna, and a fourth antenna; the second radio frequency transceiver includes: a third frequency band signal transmission pin, a fourth frequency band signal transmission pin, a third frequency band The main set signal receiving pin, the third frequency band diversity signal receiving pin, the fourth frequency band main set signal receiving pin and the fourth frequency band diversity signal receiving pin; wherein the first frequency band filter and the second frequency band filter The device is a triplexer or a quadruplexer;

The third frequency band signal transmitting pin, the third PA, the first frequency band filter, the third switch, the third radio frequency connector and the third antenna are connected in sequence; the first The three-band main set signal receiving pin and the fourth frequency band diversity signal receiving pin are respectively connected to the first frequency band filter;

The fourth frequency band signal transmitting pin, the fourth PA, the second frequency band filter, the fourth switch, the fourth radio frequency connector and the fourth antenna are connected in sequence; the first The four-band main set signal receiving pin and the third frequency band diversity signal receiving pin are respectively connected to the second frequency band filter.

In a third aspect, a radio frequency front-end device is provided, wherein the device includes: a third radio frequency transceiver, a fifth PA, a sixth PA, a fifth switch, a sixth switch, a quadruplexer, a third double filter, The fifth radio frequency connector, the sixth radio frequency connector, the third bandpass filter, the fifth antenna and the sixth antenna; the third radio frequency transceiver includes: the fifth frequency band signal transmitting pin, the sixth frequency band signal transmitting tube pin, the fifth frequency band main set signal receiving pin, the fifth frequency band diversity signal receiving pin, the sixth frequency band main set signal receiving pin and the sixth frequency band diversity signal receiving pin;

The fifth frequency band signal transmitting pin, the fifth PA, the quadruplexer, the fifth switch, the third bandpass filter, the fifth radio frequency connector and the fifth antenna connected in sequence; the fifth frequency band main set signal receiving pin and the sixth frequency band main set signal receiving pin are respectively connected to the quadruplexer, the sixth frequency band signal transmitting pin, the sixth PA and The quadruplexers are connected in sequence;

The fifth frequency band diversity signal receiving pin and the sixth frequency band diversity signal receiving pin are respectively connected to the third dual filter, the third dual filter, the sixth switch, and the sixth radio frequency are connected device and the sixth antenna are connected in sequence.

In this way, the radio frequency front-end device provided by the embodiment of the present invention can realize CA combination between uplink and downlink bands of two frequency bands by using two antennas and two switches. The RF front-end device of the embodiment of the present invention needs to use three antennas and three switches compared with the existing scheme, regardless of the number of antennas or the number of switches, which can reduce the PCB layout area and design complexity, so it can save Hardware cost and human design cost.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments of the present invention. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention , for those skilled in the art, other drawings can also be obtained according to these drawings without paying creative labor.

FIG. 1 is a structural schematic diagram of an existing uplink and downlink interband CA radio frequency front-end device;

FIG. 2 is a structural schematic diagram of an existing uplink and downlink interband CA radio frequency front-end device;

FIG. 3 is a structural schematic diagram of an existing uplink and downlink interband CA radio frequency front-end device;

FIG. 4 is a schematic structural diagram of a radio frequency front-end device according to Embodiment 1 of the present invention;

5 is a schematic structural diagram of a radio frequency front-end device according to Embodiment 2 of the present invention;

6 is a schematic structural diagram of a radio frequency front-end device according to Embodiment 2 of the present invention;

FIG. 7 is a schematic structural diagram of a radio frequency front-end device according to Embodiment 3 of the present invention.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Embodiment one

Referring to FIG. 4 , it shows a schematic structural diagram of a radio frequency front-end device according to Embodiment 1 of the present invention.

The radio frequency front-end device of the embodiment of the present invention implements CA between uplink and downlink bands based on the time division mode of TDD. The uplink and downlink interband CA radio frequency front-end device of the embodiment of the present invention includes: a first radio frequency transceiver 101, a first PA102, a second PA103, a first switch 104, a second switch 105, a first bandpass filter 106, a second Bandpass filter 107, first double filter 108, second double filter 109, first radio frequency connector 110, second radio frequency connector 111, first antenna 112 and second antenna 113; first radio frequency transceiver 101 Including: the first frequency band signal transmitting pin, the second frequency band signal transmitting pin, the first frequency band main set signal receiving pin, the first frequency band diversity signal receiving pin, the second frequency band main set signal receiving pin and the second frequency band Diversity signal receiving pin. Each pin included in the first radio frequency transceiver is not labeled in FIG. 4 .

Wherein, the first frequency band is frequency band A, and the second frequency band is frequency band B. The first switch 104 includes at least three terminals, and the second switch 105 also includes at least three terminals. The first switch and the second switch can be single-pole double-throw switches. It may be a single-pole multi-throw switch, which is used to switch the transmission and reception of signals. In the embodiment of the present invention, the signal reception of the first frequency band and the second frequency band is performed synchronously.

The specific connection relationship is: the first frequency band signal transmission pin, the first PA 102 , the first bandpass filter 106 and the first end of the first switch 104 are connected in sequence, and Band A TX in FIG. 4 is frequency band A signal transmission.

The first frequency band main set signal receiving pin and the second frequency band diversity signal receiving pin are connected to the first double filter 108 respectively, and the first double filter 108 is connected to the second end of the first switch 104; the control of the first switch terminal, the first radio frequency connector 110 and the first antenna 112 are connected in sequence. Among them, Band B DRX (Diversity Receiver, diversity reception) refers to the diversity reception of the second frequency band; Band A PRX (Primarily Receiver, main collection reception) refers to the first frequency band primary reception; ANT refers to the antenna.

The second frequency band signal transmission pin, the second PA 103 , the second bandpass filter 107 and the first end of the second switch 105 are connected in sequence, and Band B TX in FIG. 4 is frequency band B signal transmission.

The second frequency band main set signal receiving pin and the first frequency band diversity signal receiving pin are connected to the second double filter 109 respectively, and the second double filter 109 is connected to the second end of the second switch 105; the second switch 105 The control terminal, the second radio frequency connector 111 and the second antenna 113 are connected in sequence. Band A DRX is the diversity reception of the first frequency band; Band B PRX is the main set reception of the second frequency band.

It should be noted that the positions of the PRX/DRX pins of the first frequency band can be interchanged, and the positions of the PRX/DRX pins of the second frequency band can also be interchanged. In the uplink and downlink inter-band CA RF front-end device of the embodiment of the present invention, two antenna paths can work simultaneously, that is, four receiving paths can work simultaneously, so the circuit can support inter-band downlink CA in two frequency bands.

The signal uplink and downlink process of the uplink and downlink inter-band CA radio frequency front-end device in the specific use process provided by the embodiment of the present invention is as follows:

When the first end of the first switch 104 is connected to the control end of the first switch 104, and the first end of the second switch 105 is connected to the control end of the second switch, that is, both the first switch and the second switch are turned on to transmit When in state:

The first frequency band signal is sent to the first antenna 112 through the first PA 102 , the first bandpass filter 106 , the first switch 104 , and the first radio frequency connector 110 in sequence. The second frequency band signal is sequentially sent to the second antenna 113 through the second PA 103 , the second bandpass filter 107 , the second switch 105 , and the second radio frequency connector 111 to complete the processing of the upper and lower signals.

The uplink process of the signal in frequency band A, namely the first frequency band, is: first radio frequency transceiver → first PA → TX bandpass filter → first switch → first radio frequency connector → ANT0.

The uplink process of the signal in frequency band B, namely the second frequency band, is: second radio frequency transceiver → second PA → TX bandpass filter → second switch → second radio frequency connector → ANT1.

When the second terminal of the first switch 104 is connected to the control terminal of the first switch 104, and the second terminal of the second switch 105 is connected to the control terminal of the second switch 105, that is, both the first switch and the second switch are opened to receive When in state:

The signal received by the first antenna 112 is sent to the first double filter 108 sequentially through the first radio frequency connector 110 and the first switch 104, and is separated into the main set signal of the first frequency band and the diversity signal of the second frequency band through the first double filter 108. signal, the first frequency band main set signal is sent to the first frequency band main set signal receiving pin, and the second frequency band diversity signal is sent to the second frequency band diversity signal receiving pin;

The signal received by the second antenna 113 is sent to the second double filter 109 through the second radio frequency connector 111 and the second switch 105 in turn, and is separated into the first frequency band diversity signal and the second frequency band main set through the second double filter 109. signal, the first frequency band diversity signal is sent to the first frequency band diversity signal receiving pin, the second frequency band main set signal is sent to the second frequency band main set signal receiving pin, and finally the processing of the lower signal is completed.

The specific processing flow for the downlink signal is as follows:

a. ANT0→first RF connector→first switch→first dual filter→TR (frequency band A PRX)

b. ANT0→first RF connector→first switch→first dual filter→TR (band B DRX)

c. ANT1→Second RF Connector→Second Switch→Second Dual Filter→TR (Band A DRX)

d. ANT1→second RF connector→second switch→second dual filter→TR (frequency band B PRX).

In the radio frequency front-end device of the embodiment of the present invention, based on the TDD time-division method, the transmission path of the first frequency band signal and the transmission path of the second frequency band signal are respectively set on the first switch and the second switch, and the reception of the first frequency band signal The channel and the receiving channel of the second frequency band signal are respectively set on the first switch and the second switch, so that the signals of the two frequency bands can be transmitted at the same time, and the signals of the two frequency bands can be received at the same time, so as to realize the uplink and downlink of the time division method based on TDD Interband CA. In the radio frequency front-end device of the embodiment of the present invention, two antennas and two switches can be used to realize CA combination between uplink and downlink bands of two frequency bands. The RF front-end device of the embodiment of the present invention needs to use three antennas and three switches compared with the existing scheme, regardless of the number of antennas or the number of switches, which can reduce the PCB layout area and design complexity, so it can save Hardware cost and human design cost.

Embodiment two

Referring to FIG. 5 , it shows a schematic structural diagram of a radio frequency front-end device according to Embodiment 2 of the present invention.

The radio frequency front-end device of the embodiment of the present invention implements CA between uplink and downlink bands based on FDD frequency division mode. Since FDD works in frequency division mode, TX and RX are performed simultaneously, so TX of one frequency band and RX of two frequency bands are configured on the same antenna switch port, so as to realize that two antennas support uplink and downlink CA between two FDD frequency bands the goal of.

The radio frequency front-end device of the embodiment of the present invention includes: a second radio frequency transceiver 201, a third PA202, a fourth PA203, a third switch 204, a fourth switch 205, a first frequency band filter 206, a second frequency band filter 207, a Three radio frequency connectors 208, the fourth radio frequency connector 209, the third antenna 210 and the fourth antenna 211; the second radio frequency transceiver 201 includes: the third frequency band signal transmission pin, the fourth frequency band signal transmission pin, the third frequency band The main set signal receiving pin, the third frequency band diversity signal receiving pin, the fourth frequency band main set signal receiving pin and the fourth frequency band diversity signal receiving pin. The pins included in the first radio frequency transceiver are not labeled in FIGS. 5 and 6 .

Wherein, the first frequency band filter and the second frequency band filter are triplexers or quadruplexers. Figure 5 shows a schematic diagram of a radio frequency front-end device when the first frequency band filter and the second frequency band filter are quadruplexers; Figure 6 shows the radio frequency when the first frequency band filter and the second frequency band filter are triplexers Schematic diagram of the front-end device. It should be noted that, in a specific implementation process, the first frequency band filter and the second frequency band filter may also be different. Referring to FIG. 5 , description will be made below by taking the first frequency band filter and the second frequency band filter as quadruplexers as an example.

The specific connection relationship of each part of the radio frequency front-end device as shown in Figure 5 is: the third frequency band signal transmission pin, the third PA202, the first quadruplexer 206, the third switch 204, the third radio frequency connector 208 and the third The antenna 210 is connected in sequence; the main set signal receiving pin of the third frequency band and the diversity signal receiving pin of the fourth frequency band are respectively connected to the first quadruplexer. Band A TX in Fig. 5 is frequency band A signal transmission, Band A is the third frequency band, and Band B is the fourth frequency band.

The fourth frequency band signal transmitting pin, the fourth PA203, the second quadruplexer 207, the fourth switch 205, the fourth radio frequency connector 209 and the fourth antenna 211 are connected in sequence; the fourth frequency band main set signal receiving pin, the fourth The three-band diversity signal receiving pins are respectively connected to the second quadruplexer 207 .

It should be noted that the positions of the PRX/DRX pins of the third frequency band can be interchanged, and the positions of the PRX/DRX pins of the fourth frequency band can also be interchanged.

The signal uplink and downlink process of the radio frequency front-end device provided by the embodiment of the present invention in the specific use process is as follows:

When both the third switch and the fourth switch are closed, the signal uplink and downlink processes are executed simultaneously, as follows:

The third frequency band signal is sent to the third antenna 210 via the third PA 202 , the first quadruplexer 206 , the third switch 204 , and the third radio frequency connector 208 in sequence.

The signal received by the third antenna 210 is sequentially sent to the first quadruplexer 206 through the third radio frequency connector 208 and the third switch 204, and is separated by the first quadruplexer 206 into the main signal of the third frequency band and the diversity signal of the fourth frequency band. Signal, the main set signal of the third frequency band is sent to the receiving pin of the main set signal of the third frequency band, and the diversity signal of the fourth frequency band is sent to the receiving pin of the fourth frequency band diversity signal; among them, Band B DRX is the diversity receiving pin of the fourth frequency band; Band A PRX is the main set reception of the third frequency band. The quadruplexer supports the reception and transmission of signals in the third and fourth frequency bands.

The fourth frequency band signal is sent to the fourth antenna 211 through the fourth PA 203 , the second quadruplexer 207 , the fourth switch 205 , and the fourth radio frequency connector 209 in sequence.

The signal received by the fourth antenna 211 is sent to the second quadruplexer 207 through the fourth radio frequency connector 209 and the fourth switch 205 in turn, and is separated into the third frequency band diversity signal and the fourth frequency band main set signal by the second quadruplexer 207. signal, the diversity signal of the third frequency band is sent to the receiving pin of the diversity signal of the third frequency band, and the main set signal of the fourth frequency band is sent to the receiving pin of the main set signal of the fourth frequency band.

It can be seen that the uplink and downlink processing flow of frequency band A, namely the third frequency band, and frequency band B, namely the fourth frequency band, is as follows:

The uplink process of frequency band A signal is: second RF transceiver → third PA → first quadruplexer → third switch → third RF connector → ANT0

The uplink process of the frequency band B signal is: second radio frequency transceiver → fourth PA → second quadruplexer → fourth switch → fourth radio frequency connector → ANT1.

In the radio frequency front-end device in the embodiment of the present invention, two antenna paths can work at the same time, so the circuit can support inter-band uplink CA in two frequency bands.

The downlink process of frequency band A and B signals is as follows:

a. ANT0→third RF connector→third switch→first quadruplexer→TR (frequency band A PRX)

b. ANT0→third RF connector→third switch→first quadruplexer→TR (frequency band B DRX)

c. ANT1→fourth RF connector→fourth switch→second quadruplexer→TR (frequency band A DRX)

d. ANT1→fourth RF connector→fourth switch→second quadruplexer→TR (frequency band B PRX)

In the radio frequency front-end device in the embodiment of the present invention, two antenna paths can work simultaneously, that is, four receiving paths can work simultaneously, so the circuit can support inter-band downlink CA in two FDD frequency bands.

In the radio frequency front-end device of the embodiment of the present invention, based on the frequency division working mode of FDD, the transmission path of the third frequency band signal and the transmission path of the fourth frequency band signal are respectively set on the third switch and the fourth switch, and the third frequency band signal The receiving path of the signal in the fourth frequency band and the receiving path of the fourth frequency band signal are respectively set on the third switch and the fourth switch, so that the signals of the two frequency bands can be transmitted and received at the same time, so as to realize the uplink and downlink inter-band CA based on the FDD frequency division method. In the radio frequency front-end device of the embodiment of the present invention, two antennas and two switches can be used to realize CA combination between uplink and downlink bands of two frequency bands. The RF front-end device of the embodiment of the present invention needs to use three antennas and three switches compared with the existing scheme, regardless of the number of antennas or the number of switches, which can reduce the PCB layout area and design complexity, so it can save Hardware cost and human design cost.

Embodiment three

Referring to FIG. 7 , it shows a schematic structural diagram of a radio frequency front-end device according to Embodiment 3 of the present invention.

The radio frequency front-end device of the embodiment of the present invention implements CA between uplink and downlink bands based on FDD frequency division mode. Since FDD is a frequency division mode of operation, TX and RX are performed simultaneously. In the embodiment of the present invention, a quadruplexer is used to configure the switch port of an antenna to realize simultaneous transmission and reception of signals in two frequency bands, and the other antenna realizes signal transmission in two frequency bands. Auxiliary reception, in order to achieve the purpose of two antennas supporting uplink and downlink CA between two FDD frequency bands.

The radio frequency front-end device of the embodiment of the present invention includes: a third radio frequency transceiver 301, a fifth PA 302, a sixth PA 303, a fifth switch 304, a sixth switch 305, a quadruplexer 306, a third double filter 307, a fifth RF connector 308, the sixth RF connector 309, the third bandpass filter 310, the fifth antenna 311 and the sixth antenna 312; the third radio frequency transceiver 301 includes: the fifth frequency band signal transmission pin, the sixth frequency band signal The transmitting pin, the fifth frequency band main set signal receiving pin, the fifth frequency band diversity signal receiving pin, the sixth frequency band main set signal receiving pin and the sixth frequency band diversity signal receiving pin. Wherein, since the pins are only small interfaces, the pins are not drawn one by one on the third radio frequency transceiver of Fig. 7 and the pins are labeled, the intersection of each wire and the third radio frequency transceiver Each corresponds to a pin.

The specific connection relationship is shown in Figure 7: the fifth frequency band signal transmission pin, the fifth PA302, the quadruplexer 306, the fifth switch 304, the third bandpass filter 310, the fifth radio frequency connector 308 and the fifth antenna 311 Connect sequentially; the fifth frequency band main set signal receiving pin, the sixth frequency band main set signal receiving pin are respectively connected to the quadplexer 306, the sixth frequency band signal transmitting pin, the sixth PA303 and the quadplexer 306 are connected in sequence . In Figure 7, Band A is the fifth frequency band, Band B is the sixth frequency band, TX is transmission, ANT0 is the fifth antenna, ANT1 is the sixth antenna; Band A DRX is the fifth frequency band diversity reception; Band B PRX is the sixth Band B DRX is the diversity reception of the sixth frequency band; Band A PRX is the fifth frequency band main set reception.

The fifth frequency band diversity signal receiving pin and the sixth frequency band diversity signal receiving pin are respectively connected to the third double filter 307, the third double filter 307, the sixth switch 305, the sixth radio frequency connector 309 and the sixth antenna 312 Connect sequentially.

It should be noted that the positions of the PRX/DRX pins of the fifth frequency band can be interchanged, and the positions of the PRX/DRX pins of the sixth frequency band can also be interchanged.

The signal uplink and downlink process of the radio frequency front-end device provided by the embodiment of the present invention in the specific use process is as follows:

When both the fifth switch and the sixth switch are closed, the signal uplink and downlink processes are executed simultaneously, as follows:

The fifth frequency band signal is sent to the quadruplexer 306 through the fifth PA302, and the sixth frequency band signal is sent to the quadruplexer 306 through the sixth PA303; the fifth frequency band signal and the sixth frequency band signal received by the quadruplexer 306 pass through the fifth The switch 304 , the third bandpass filter 310 , and the fifth radio frequency connector 308 send to the fifth antenna 311 . Since the signals of the fifth frequency band and the signals of the sixth frequency band are aggregated on the fifth switch, there will be overlapping products. Therefore, a third band-pass filter is added to separate the overlapping products.

The signal received by the fifth antenna 311 is sent to the quadruplexer 306 through the fifth radio frequency connector 308, the fifth switch 304, and the third bandpass filter 310 in sequence, and is separated by the quadruplexer 306 into the fifth frequency band main set signal, The sixth frequency band main set signal, the fifth frequency band main set signal is sent to the fifth frequency band main set signal receiving pin, the sixth frequency band main set signal is sent to the sixth frequency band main set signal receiving pin.

The signal received by the sixth antenna 312 is sequentially sent to the third dual filter 307 through the sixth radio frequency connector 309 and the sixth switch 305, and is separated into the fifth frequency band diversity signal and the sixth frequency band diversity signal by the third dual filter 307. , the fifth frequency band diversity signal is sent to the fifth frequency band diversity signal receiving pin, and the sixth frequency band diversity signal is sent to the sixth frequency band diversity signal receiving pin. Wherein, the double filter can be called a one-input two-out filter, which can separate the received signal into signals of two frequency bands.

It can be seen that the uplink and downlink processing flow of frequency band A, namely the fifth frequency band, and frequency band B, namely the sixth frequency band, is as follows:

The uplink process of frequency band A signal is: third radio frequency transceiver → fifth PA → quadruplexer → fifth switch → third bandpass filter → fifth radio frequency connector → fifth antenna ANT0;

The uplink process of the frequency band B signal is: third radio frequency transceiver → sixth PA → quadruplexer → fifth switch → third bandpass filter → fifth radio frequency connector → fifth antenna ANT0.

In the radio frequency front-end device in the embodiment of the present invention, the transmission of two frequency bands can work simultaneously on one antenna, so the circuit can support inter-band uplink CA of the two frequency bands.

The downlink process of frequency band A and B signals is as follows:

a. ANT0→fifth RF connector→third bandpass filter→fifth switch→quadplexer→TR (frequency band APRX)

b. ANT0→fifth RF connector→third bandpass filter→fifth switch→quadplexer→TR (band BPRX)

c. ANT1→sixth RF connector→sixth switch→third double filter→TR (band A DRX)

d. ANT1→sixth RF connector→sixth switch→third dual filter→TR (frequency band B DRX).

In the radio frequency front-end device in the embodiment of the present invention, two antenna paths can work simultaneously, that is, four receiving paths can work simultaneously, so the circuit can support inter-band downlink CA in two FDD frequency bands.

In the radio frequency front-end device of the embodiment of the present invention, based on the FDD frequency division working mode, the transmission channel of the fifth frequency band signal, the transmission channel of the sixth frequency band signal, the main set receiving channel of the fifth frequency band signal and the main set of the sixth frequency band signal The collective receiving path is set on the fifth switch, and the diversity receiving path of the fifth frequency band signal and the diversity receiving path of the sixth frequency band signal are set on the sixth switch, so that the signals of the two frequency bands can be transmitted and received at the same time, thereby realizing Uplink and downlink interband CA based on frequency division method of FDD. In the radio frequency front-end device of the embodiment of the present invention, two antennas and two switches can be used to realize CA combination between uplink and downlink bands of two frequency bands. The RF front-end device of the embodiment of the present invention needs to use three antennas and three switches compared with the existing scheme, regardless of the number of antennas or the number of switches, which can reduce the PCB layout area and design complexity, so it can save Hardware cost and human design cost.

In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure the understanding of this description.

Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, in order to streamline this disclosure and to facilitate an understanding of one or more of the various inventive aspects, various features of the invention are sometimes grouped together in a single embodiment, figure, or its description. This method of disclosure, however, is not to be interpreted as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the Detailed Description are hereby expressly incorporated into this Detailed Description, with each claim standing on its own as a separate embodiment of this invention.

Those skilled in the art can understand that the modules in the device in the embodiment can be adaptively changed and arranged in one or more devices different from the embodiment. Modules or units or components in the embodiments may be combined into one module or unit or component, and furthermore may be divided into a plurality of sub-modules or sub-units or sub-assemblies. All features disclosed in this specification (including accompanying claims, abstract and drawings) and any method or method so disclosed may be used in any combination, except that at least some of such features and/or processes or units are mutually exclusive. All processes or units of equipment are combined. Each feature disclosed in this specification (including accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.

Furthermore, those skilled in the art will understand that although some embodiments described herein include some features included in other embodiments but not others, combinations of features from different embodiments are meant to be within the scope of the invention. and form different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (8)

1. a kind of radio frequency front-end device, it is characterised in that including：First RF transceiver, a PA, the 2nd PA, first switch, Second switch, the first bandpass filter, the second bandpass filter, the first double filter, the second double filter, the connection of the first radio frequency Device, the second radio frequency connector, first antenna and the second antenna；First RF transceiver includes：First frequency band signals are sent out Penetrate pin, the second frequency band signals transmitting pin, the main collection signal of the first frequency range and receive pin, the first frequency range diversity signal reception pipe The main collection signal of pin, the second frequency range receives pin and the second frequency range diversity signal reception pin；

The first frequency band signals transmitting pin, a PA, first bandpass filter and the first switch First end is sequentially connected with；The main collection signal of first frequency range receive pin, the second frequency range diversity signal reception pin respectively with institute State the first double filter to be connected, first double filter is connected with the second end of the first switch；The first switch Control end, first radio frequency connector and the first antenna are sequentially connected with；

The second frequency band signals transmitting pin, the 2nd PA, second bandpass filter and the second switch First end is sequentially connected with；The main collection signal of second frequency range receive pin, the first frequency range diversity signal reception pin respectively with institute State the second double filter to be connected, second double filter is connected with the second end of the second switch；The second switch Control end, second radio frequency connector and second antenna are sequentially connected with.

2. device according to claim 1, it is characterised in that when first end and the first switch of the first switch Control end connection and the first end of second switch when being connected with the control end of the second switch：

First frequency band signals are successively through a PA, first bandpass filter, the first switch, first radio frequency Connector is sent to the first antenna；

Second frequency band signals are sent to second through the 2nd PA, the second bandpass filter, second switch, the second radio frequency connector successively Antenna.

3. device according to claim 1, it is characterised in that when the control of the second end and the first switch of first switch When second end of end connection processed and the second switch is connected with the control end of the second switch：

The signal that the first antenna is received is sent to the first double filter through the first radio frequency connector, first switch successively, The main collection signal of the first frequency range, the second frequency range diversity signal, the main collection letter of the first frequency range are separated into through first double filter Number send to the main collection signal of the first frequency range and to receive pin, the second frequency range diversity signal sends to the second frequency range diversity signal and connect Closed tube pin；

The signal that second antenna is received is sent to the second double filter through the second radio frequency connector, second switch successively, The main collection signal of the first frequency range diversity signal, the second frequency range, the first frequency range diversity letter are separated into through second double filter Number send to the first frequency range diversity signal reception pin, the main collection signal of the second frequency range is sent to the main collection letter of second frequency range Number receive pin.

4. device according to claim 1, it is characterised in that the first switch, second switch, are single-pole double-throw switch (SPDT) Or single pole multiple throw.

5. a kind of radio frequency front-end device, it is characterised in that including：Second RF transceiver, the 3rd PA, the 4th PA, the 3rd switch, 4th switch, first band wave filter, second band wave filter, the 3rd radio frequency connector, the 4th radio frequency connector, third antenna And the 4th antenna；Second RF transceiver includes：3rd frequency band signals transmitting pin, the 4th frequency band signals transmitting tube The main collection signal of pin, the 3rd frequency range receives the main collection signal of pin, the 3rd frequency range diversity signal reception pin, the 4th frequency range and receives pin And the 4th frequency range diversity signal reception pin；Wherein described first band wave filter, the second band wave filter, are three works Device or four work devices；

It is 3rd frequency band signals transmitting pin, the 3rd PA, the first band wave filter, the 3rd switch, described 3rd radio frequency connector and the third antenna are sequentially connected with；The main collection signal of 3rd frequency range receives pin, the 4th frequency range Diversity signal reception pin is connected with the first band wave filter respectively；

It is 4th frequency band signals transmitting pin, the 4th PA, the second band wave filter, the 4th switch, described 4th radio frequency connector and the 4th antenna are sequentially connected with；The main collection signal of 4th frequency range receives pin, the 3rd frequency range Diversity signal reception pin is connected with the second band wave filter respectively.

6. device according to claim 5, it is characterised in that when the described 3rd switch, the 4th switch are closed：

3rd frequency band signals are successively through the 3rd PA, the first band wave filter, the 3rd switch, the 3rd radio frequency Connector is sent to the third antenna；

The signal that the third antenna is received sends to first band and filters through the 3rd radio frequency connector, the 3rd switch successively Device, the main collection signal of the 3rd frequency range, the 4th frequency range diversity signal, the 3rd frequency range master are separated into through the first band wave filter Collection signal is sent to the main collection signal of the 3rd frequency range and receives pin, and the 4th frequency range diversity signal is sent to the 4th frequency range diversity letter Number receive pin；

4th frequency band signals are successively through the 4th PA, the second band wave filter, the 4th switch, the 4th radio frequency Connector is sent to the 4th antenna；

The signal that 4th antenna is received is sent to described the through the 4th radio frequency connector, the 4th switch successively Two band filters, the 3rd frequency range diversity signal, the main collection signal of the 4th frequency range are separated into through the second band wave filter, described 3rd frequency range diversity signal is sent to the 3rd frequency range diversity signal reception pin, the main collection signal of the 4th frequency range send to The main collection signal of 4th frequency range receives pin.

7. a kind of radio frequency front-end device, it is characterised in that including：3rd RF transceiver, the 5th PA, the 6th PA, the 5th switch, 6th switch, four work devices, the 3rd double filter, the 5th radio frequency connector, the 6th radio frequency connector, the 3rd bandpass filter, Five antennas and the 6th antenna；3rd RF transceiver includes：5th frequency band signals transmitting pin, the 6th frequency band signals hair Penetrate the main collection signal of pin, the 5th frequency range and receive the main collection signal reception of pin, the 5th frequency range diversity signal reception pin, the 6th frequency range Pin and the 6th frequency range diversity signal reception pin；

The 5th frequency band signals transmitting pin, the 5th PA, the four works device, the 5th switch, the 3rd band logical Wave filter, the 5th radio frequency connector and the 5th antenna are sequentially connected with；The main collection signal reception pipe of 5th frequency range The main collection signal of pin, the 6th frequency range receives pin and is connected with the four works device respectively, and the 6th frequency band signals launch pin, described 6th PA and the four works device are sequentially connected with；

The 5th frequency range diversity signal reception pin, the 6th frequency range diversity signal reception pin are filtered with described 3rd pair respectively Device is connected, and the 3rd double filter, the 6th switch, the 6th radio frequency connector and the 6th antenna sequentially connect Connect.

8. device according to claim 7, it is characterised in that when the described 5th switch, the 6th switch are closed：

5th frequency band signals are sent to the four works device through the 5th PA, and the 6th frequency band signals are through the 6th PA Send to the four works device；The 5th frequency band signals that the four works device is received, the 6th frequency band signals are opened through the described 5th successively Pass, the 3rd bandpass filter, the 5th radio frequency connector are sent to the 5th antenna；

The signal that 5th antenna is received is filtered through the 5th radio frequency connector, the 5th switch, the 3rd band logical successively Ripple device is sent to the four works device, and the main collection signal of the 5th frequency range, the main collection signal of the 6th frequency range are separated into through the four works device, described The main collection signal of 5th frequency range is sent to the main collection signal of the 5th frequency range and receives pin, and the main collection signal of the 6th frequency range is sent to described The main collection signal of 6th frequency range receives pin；

The signal that 6th antenna is received is sent to described the through the 6th radio frequency connector, the 6th switch successively Three double filters, the 5th frequency range diversity signal, the 6th frequency range diversity signal, the described 5th are separated into through the 3rd double filter Frequency range diversity signal is sent to the 5th frequency range diversity signal reception pin, and the 6th frequency range diversity signal is sent to the described 6th Frequency range diversity signal reception pin.