CN111404570B - Radio frequency circuit and terminal equipment - Google Patents

Abstract

The embodiment of the invention discloses a radio frequency circuit and terminal equipment. The radio frequency circuit includes: a radio frequency control module, a first radio frequency transceiver module, a second radio frequency transceiver module, a first frequency division module, a second frequency division module, a first switch and multiple antennas, and the radio frequency control module is used to control the first radio frequency transceiver The module transmits and receives radio frequency signals in the first frequency band through the first frequency division module, the first switch and the corresponding antenna, and controls the first radio frequency transceiver module and the second radio frequency transceiver module to perform the second frequency division module and the corresponding antenna respectively. The reception of radio frequency signals in the first frequency band, and the transmission and reception of radio frequency signals in the second frequency band. The technical solution of the embodiment of the present invention simplifies the structure of the radio frequency circuit, reduces the layout area of the radio frequency device, reduces the design cost of the radio frequency circuit, improves the radio frequency performance and implementability of the radio frequency circuit, and is beneficial to the commercialization of communication products change.

Description

RF circuits and terminal equipment

technical field

The embodiments of the present invention relate to the technical field of communication, and in particular, to a radio frequency circuit and a terminal device.

Background technique

With the increasing demand for mobile data, the fifth generation of mobile communication technology 5G has become a hot topic in the communication industry. At present, major operators have unclear requirements and standards for 5G communications. The RF solution and antenna design are relatively complex. Too many RF devices, switches, and antennas in the RF circuit will result in high overall design costs and affect RF performance. It is not conducive to the promotion of 5G communication.

Contents of the invention

The present invention provides a radio frequency circuit and terminal equipment to simplify the structure of the radio frequency circuit, reduce the layout area of the radio frequency device, reduce the design cost of the radio frequency circuit, improve the radio frequency performance and implementability of the radio frequency circuit, and promote the development of 5G communication products commercialize.

In a first aspect, an embodiment of the present invention provides a radio frequency circuit, the radio frequency circuit includes:

A radio frequency control module, a first radio frequency transceiver module, a second radio frequency transceiver module, a first frequency division module, a second frequency division module, a first switch and multiple antennas;

The first radio frequency transceiver module is connected to the first end of the first switch through the first frequency division module, at least two antennas are respectively connected to different second ends of the first switch, and the first A radio frequency transceiver module and the second radio frequency transceiver module are connected to at least two antennas through the second frequency division module, and the antennas connected to the first switch and the second frequency division module are different;

The radio frequency control module is used to control the first radio frequency transceiver module to transmit and receive radio frequency signals in the first frequency band through the first frequency division module, the first switch and the corresponding antenna, and control the first The radio frequency transceiving module and the second radio frequency transceiving module respectively perform the receiving of the radio frequency signal of the first frequency band and the transceiving of the radio frequency signal of the second frequency band through the second frequency division module and the corresponding antenna.

Optionally, the first frequency band includes a 5G frequency band, and the second frequency band includes an LTE frequency band.

Optionally, the first radio frequency transceiver module includes:

A plurality of first radio frequency transceivers of different first frequency bands, and a first diversity receiver and a plurality of sub-diversity receivers corresponding to each of the first radio frequency transceivers, the sub-diversity receivers include a first sub-diversity receiver a diversity receiver and a second sub-diversity receiver;

The radio frequency control module includes a plurality of radio frequency signal terminals, and the first terminals of the first radio frequency transceiver, the first diversity receiver, the first sub-diversity receiver, and the second sub-diversity receiver are respectively Connected to different radio frequency signal ends of the radio frequency control module, the first radio frequency transceiver and the second end of the first diversity receiver are respectively connected to the first frequency division module, and the first sub-diversity receiver and the second end of the second sub-diversity receiver are connected to the second frequency division module.

Optionally, the first frequency division module includes a first combiner and a second combiner, and the second terminals of the plurality of first radio frequency transceivers are respectively connected to different first combiners of the first combiner. One end, different second ends of the first diversity receiver are connected to different first ends of the second combiner, the second ends of the first combiner and the second combiner are respectively connected to the first end of the first switch.

Optionally, the first frequency division module includes a first combiner and a second combiner, and each of the first combiner and the second combiner includes three first terminals and one second end;

The radio frequency circuit also includes:

The second switch and the third switch, each of the second switch and the third switch includes a plurality of first terminals and one second terminal, and the second terminal of the second switch communicates with the two first radio frequency transceivers The second terminals of the first combiner are respectively connected to different first terminals of the first combiner, and the second terminals of the other first RF transceivers are respectively connected to different first terminals of the second switch, and the first The second ends of the three switches and the second ends of the two first diversity receivers are respectively connected to different first ends of the second combiner, and the second ends of the remaining first diversity receivers are respectively connected to To the different first terminals of the third switch, the second terminals of the first combiner and the second combiner are respectively connected to the first terminal of the first switch.

Optionally, the first switch includes a plurality of first terminals and a plurality of second terminals, and the second terminals of the first combiner and the second combiner are respectively connected to different the first end of .

Optionally, the second radio frequency transceiver module includes a second radio frequency transceiver and a second diversity receiver in a second frequency band;

The first ends of the second radio frequency transceiver and the second diversity receiver are respectively connected to different radio frequency signal ends of the radio frequency control module, the second radio frequency transceiver and the second diversity receiver and the The aforementioned second ends are respectively connected to the second frequency dividing module.

Optionally, the second frequency division module includes a third combiner and a fourth combiner, and the second end of the second radio frequency transceiver and the different first sub-diversity receivers are respectively connected to the Different first ends of the third combiner, second ends of the second diversity receiver and different second sub-diversity receivers are respectively connected to different first ends of the fourth combiner, the The second ends of the third combiner and the fourth combiner are respectively connected to different antennas.

Optionally, the second frequency division module includes a third combiner and a fourth combiner, and each of the third combiner and the fourth combiner includes three first terminals and one second end;

The radio frequency circuit also includes a fourth switch and a fifth switch, each of the fourth switch and the fifth switch includes a plurality of first terminals and a second terminal, the second terminal of the fourth switch, the The second end of the second radio frequency transceiver and the second end of one of the first sub-diversity receivers are respectively connected to different first ends of the third combiner, and the first ends of the other first sub-diversity receivers The two terminals are respectively connected to different first terminals of the fourth switch, the second terminal of the fifth switch, the second terminal of the second diversity receiver and the second terminal of one of the second sub-diversity receivers terminals are respectively connected to different first terminals of the fourth combiner, and the second terminals of the remaining second sub-diversity receivers are respectively connected to different first terminals of the fifth switch, and the third combined circuit and the second end of the fourth combiner are respectively connected to different antennas.

Optionally, the radio frequency control module includes a radio frequency chip and a baseband chip, and the radio frequency chip is electrically connected to the baseband chip;

The radio frequency chip is electrically connected to the first radio frequency transceiver module, the second radio frequency transceiver module, the first frequency division module, the second frequency division module and the first switch; or the radio frequency The chip is electrically connected to the first radio frequency transceiver module and the second radio frequency transceiver module, and the baseband chip is electrically connected to the first frequency division module, the second frequency division module and the first switch. .

In a second aspect, an embodiment of the present invention further provides a terminal device, including the radio frequency circuit as described in the first aspect.

The radio frequency circuit provided by the embodiment of the present invention includes a radio frequency control module, a first radio frequency transceiver module, a second radio frequency transceiver module, a first frequency division module, a second frequency division module, a first switch and multiple antennas. Next, the radio frequency control module controls the first radio frequency transceiver module to use the first frequency division module, the first switch and at least two antennas to realize the SRS radio frequency signal transmission of the first frequency band 1T2R, and controls the second radio frequency transceiver module to use the second frequency division The module and at least two antennas realize the sending and receiving of radio frequency signals in the second frequency band and the reception of part of radio frequency signals in the first frequency band. In the independent working mode, the radio frequency control module can also control the second radio frequency transceiver module to be multiplexed to transmit and receive radio frequency signals in the first frequency band. The technical solution of the embodiment of the present invention solves the technical problems of complex design of the existing radio frequency circuit, too many radio frequency devices, switches and antennas in the radio frequency circuit, which increases the cost of circuit design, affects the radio frequency performance of the circuit, and is not conducive to the promotion of 5G communication. At the same time, it also reduces the number of radio frequency devices in the radio frequency circuit. This solution can realize the communication of two frequency bands only through four antennas, simplifies the structure of the radio frequency circuit, reduces the layout area of the radio frequency device, and reduces the design of the radio frequency circuit. The cost is improved, the radio frequency performance and implementability of the radio frequency circuit are improved, and it is beneficial to the commercialization of communication products.

Description of drawings

FIG. 1 is a schematic diagram of a module structure of a radio frequency circuit provided by an embodiment of the present invention;

FIG. 2 is a schematic diagram of a module structure of another radio frequency circuit provided by an embodiment of the present invention;

FIG. 3 is a schematic diagram of a module structure of another radio frequency circuit provided by an embodiment of the present invention;

FIG. 4 is a schematic diagram of a module structure of another radio frequency circuit provided by an embodiment of the present invention;

FIG. 5 is a schematic diagram of a module structure of another radio frequency circuit provided by an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a terminal device provided by an embodiment of the present invention.

detailed description

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.

FIG. 1 is a schematic diagram of a module structure of a radio frequency circuit provided by an embodiment of the present invention. As shown in Figure 1, the radio frequency circuit includes: a radio frequency control module 1, a first radio frequency transceiver module 2, a second radio frequency transceiver module 3, a first frequency division module 4, a second frequency division module 5, a first switch 6 and multiple strip antenna7.

The first radio frequency transceiver module 2 is connected to the first end a of the first switch 6 through the first frequency division module 4, and at least two antennas 7 are respectively connected to different second ends b of the first switch 6. The first radio frequency transceiver module 2 At least two antennas 7 are connected to the second radio frequency transceiver module 3 through the second frequency division module 5 , and the antenna 7 connected to the first switch 6 is different from the antenna 7 connected to the second frequency division module 5 .

The radio frequency control module 1 is used to control the first radio frequency transceiver module 2 to carry out the first frequency band radio frequency signal transmission and reception through the first frequency division module 4, the first switch 6 and the corresponding antenna 7, and control the first radio frequency transceiver module 2 and the second The radio frequency transceiving module 3 respectively performs reception of radio frequency signals of the first frequency band and transceiving of radio frequency signals of the second frequency band through the second frequency division module 5 and the corresponding antenna 7 .

Specifically, the first radio frequency transceiver module 2 can be used to receive or send a first frequency band radio frequency signal, the second radio frequency transceiver module 3 can be used to receive or send a second frequency band radio frequency signal, the first frequency band radio frequency signal and the second frequency band radio frequency signal At least some of the frequency bands overlap. For example, the radio frequency signal in the first frequency band may be a radio frequency signal in the 5G frequency band, and the radio frequency signal in the second frequency band may be a radio frequency signal based on the 4G Long Term Evolution (Long Term Evolution, LTE) frequency band. Since the LTE frequency band overlaps with a part of the 5G frequency band, Therefore, the second radio frequency transceiver module 3 can also be multiplexed to receive and transmit radio frequency signals in a part of the 5G frequency band.

The radio frequency circuit provided in this embodiment can simultaneously realize multiple-in multiple-out (Multiple-In Multiple Out, MIMO) technology and channel sounding reference signal (Sounding Reference Signal, SRS) round-robin technology based on the communication of multiple different frequency band signals, exemplary Ground, taking the radio frequency circuit including at least four antennas 7 as an example, the working principle of the radio frequency circuit is explained:

(1) In Non-Standalone (NSA) mode, the radio frequency circuit can simultaneously support two communication modes of the first frequency band and the second frequency band, and the radio frequency control module 1 can control the first radio frequency transceiver module 2 to send the first frequency band The SRS radio frequency signal is sent to the first frequency division module 4, and the first frequency division module 4 divides the frequency of the SRS radio frequency signal of the first frequency band, and then uses the first switch 6 to select the channel, and passes the SRS radio frequency signal of the first frequency band through the antenna 71 respectively And/or the antenna 72 transmits to the base station, realizing the SRS signal transmission in the first frequency band 1T2R (one transmitting device and two channels). The antenna 71 and the antenna 72 can also receive the radio frequency signal of the first frequency band sent by the base station, select the channel through the first switch 6, and send the radio frequency signal of the first frequency band to the first radio frequency transceiver after being divided by 4 by the first frequency dividing module Module 2, the first radio frequency transceiver module 2 receives the radio frequency signal of the first frequency band and sends it to the radio frequency control module 1 for signal processing. The radio frequency control module 1 can also control the second radio frequency transceiver module 3 to send the SRS radio frequency signal of the second frequency band to the second frequency division module 5, and the second frequency division module 5 divides the frequency of the SRS radio frequency signal of the second frequency band through the antenna respectively. 73 and antenna 74 transmit the SRS radio frequency signal of the second frequency band to the base station, realizing the SRS signal rotation of the second frequency band 1T2R. The antenna 73 and the antenna 74 can receive both the radio frequency signal of the second frequency band sent by the base station, and can also receive the radio frequency signal of the first frequency band sent by the base station, and transmit the radio frequency signal of the second frequency band through the second frequency division module 5 To the second radio frequency transceiver module 3, after the frequency division processing of the radio frequency signal of the first frequency band is sent to the first radio frequency transceiver module 2, the first radio frequency transceiver module 2 and the second radio frequency transceiver module 3 respectively receive the radio frequency signals and Send it to the radio frequency control module 1 for signal processing.

(2) In Standalone (SA) mode, the radio frequency circuit supports the communication mode of the first frequency band, and the first radio frequency transceiver module 2 can still realize the SRS signal transmission of the first frequency band 1T2R and the reception of the radio frequency signal of the first frequency band . The second radio frequency transceiver module 3 exits the communication mode of the radio frequency signal of the second frequency band, and is multiplexed for the transceiver of the radio frequency signal of the first frequency band. Specifically, the radio frequency control module 1 can control the second radio frequency transceiver module 3 to send the SRS radio frequency of the first frequency band The signal is sent to the second frequency division module 5, and the second frequency division module 5 divides the SRS radio frequency signal of the first frequency band and sends the SRS radio frequency signal of the first frequency band to the base station through the antenna 73 and the antenna 74 respectively. Meanwhile, the antenna 73 and the antenna 74 are only used for receiving radio frequency signals in the first frequency band.

In the prior art, in order to support communication in different frequency bands at the same time, it is generally necessary to set up 1T4R (1 transmitter device with 4 channels) or 2T4R (2 transmitter devices with 4 channels) structure RF circuits for RF signals in different frequency bands. Multiple front-end RF devices for transmitting and receiving RF signals in different frequency bands, multiple channel selection switches, multiple frequency dividing devices or combining devices, and multiple antennas (generally about 8), too many devices and antennas will This will lead to a complex structure of the radio frequency circuit and large line loss, which not only increases the design cost and layout area of the radio frequency circuit, but also adversely affects the radio frequency performance of the radio frequency circuit.

In the radio frequency circuit provided by the embodiment of the present invention, in the non-independent working mode, the radio frequency control module controls the first radio frequency transceiver module to use the first frequency division module, the first switch and at least two antennas to realize the SRS radio frequency signal wheel of the first frequency band 1T2R and control the second radio frequency transceiving module to use the second frequency division module and at least two antennas to realize the transceiving of the radio frequency signal in the second frequency band and the reception of part of the radio frequency signal in the first frequency band. In the independent working mode, the radio frequency control module can also control the second radio frequency transceiver module to be multiplexed to transmit and receive radio frequency signals in the first frequency band, which can significantly reduce the number of radio frequency devices in the radio frequency circuit. The technical solution of this embodiment can realize communication in different frequency bands only through four antennas, simplifies the structure of the radio frequency circuit, reduces the layout area of the radio frequency device, reduces the design cost of the radio frequency circuit, and improves the radio frequency of the radio frequency circuit. Performance and implementability are conducive to the commercialization of communication products. In addition, the sending and receiving of the radio frequency signal of the first frequency band and the sending and receiving of the radio frequency signal of the second frequency band can be carried out simultaneously or independently. Board layout, because the circuit is relatively simple, the two functional modules can also be divided into board layouts, which improves the flexibility of the RF circuit layout.

Referring to FIG. 1 , optionally, the first frequency band includes a 5G frequency band, and the second frequency band includes an LTE frequency band. Specifically, the first radio frequency transceiver module 2 can be used to receive or transmit radio frequency signals in the 5G frequency band, and the 3rd Generation Partnership Project (3rd Generation Partnership Project, 3GPP) has defined two frequency ranges (FrequencyRange, FR) used by 5G New Radio , including FR1 and FR2. Among them, the frequency range of FR1 is 450M-6000Mhz, which includes some frequency bands used by 2/3/4G and some new frequency bands. Since the FR1 wireless spectrum is below 6G, it is also commonly called Sub-6G. The frequency range of FR2 is 24250Mhz-52600Mhz. Since the wavelength of this part of the spectrum has entered the millimeter range, it is also called millimeter wave. The first radio frequency transceiver module 2 can support the reception and transmission of radio frequency signals in at least part of the FR1 and FR2 frequency ranges. The second radio frequency transceiver module 3 can be used to receive or send radio frequency signals based on the 4G Long Term Evolution (LongTerm Evolution, LTE) frequency band. Since the LTE frequency band overlaps with some frequency bands of the 5G frequency band, the second radio frequency transceiver module 3 can also be multiplexed. The reception and transmission of radio frequency signals in the 5G frequency band.

Specifically, referring to FIG. 1 , the technical solution of the embodiment of the present invention, in the NSA working mode, the radio frequency control module 1 can control the first radio frequency transceiver module 2 to pass through the first frequency division module 4, the first switch 6, the antenna 71 and the antenna 72 realizes the transmission of SRS radio frequency signals in different 5G frequency bands in turn, and the reception of radio frequency signals in different 5G frequency bands; the radio frequency control module 1 can also control the second radio frequency transceiver module 3 to realize different LTE frequency bands through the second frequency division module 5, antenna 73 and antenna 74 SRS radio frequency signal transmission in turn, and reception of radio frequency signals in different LTE frequency bands. In the SA working mode, the first radio frequency transceiver module 2 can still realize the transmission of SRS radio frequency signals in different 5G frequency bands, and the reception of radio frequency signals in different 5G frequency bands; the second radio frequency transceiver module 3 exits the 4G communication mode and reuses some 5G frequency bands Transceiver of radio frequency signals, that is, the radio frequency control module 1 can control the second radio frequency transceiving module 3 to realize the reception of radio frequency signals in different 5G frequency bands through the second frequency division module 5 , antenna 73 and antenna 74 . The technical solution of this embodiment reduces the number of radio frequency devices in the radio frequency circuit, 4G communication and 5G communication can be realized through only four antennas, simplifies the structure of the radio frequency circuit, reduces the layout area of the radio frequency device, and reduces the radio frequency The design cost of the circuit improves the radio frequency performance and implementability of the radio frequency circuit, which is conducive to the commercialization of 5G communication products.

FIG. 2 is a schematic diagram of a module structure of another radio frequency circuit provided by an embodiment of the present invention. As shown in Figure 2, optionally, the first radio frequency transceiver module 2 includes a plurality of first radio frequency transceivers 21 of different first frequency bands, and a first diversity receiver corresponding to each first radio frequency transceiver 21 22 and a plurality of sub-diversity receivers 23, the sub-diversity receiver 23 includes a first sub-diversity receiver 231 and a second sub-diversity receiver 232. Optionally, the first frequency band includes a 5G frequency band.

The radio frequency control module 1 includes a plurality of radio frequency signal terminals c, and the first ends of the first radio frequency transceiver 21, the first diversity receiver 22, the first sub-diversity receiver 231 and the second sub-diversity receiver 232 are respectively connected to the radio frequency control Different RF signal terminals c of the module 1, the second end of the first RF transceiver 21 and the first diversity receiver 22 are respectively connected to the first frequency division module 4, the first sub-diversity receiver 231 and the second sub-diversity receiver The second end of 232 is connected to the second frequency dividing module 5 .

Specifically, referring to FIG. 2, the first radio frequency transceiver module 2 may be a radio frequency module based on diversity reception technology, and each first radio frequency transceiver 21 is respectively used to realize the reception and transmission of radio frequency signals in different frequency bands in the 5G frequency band. A diversity receiver 22 and a first sub-diversity receiver 231 and a second sub-diversity receiver 232 among the plurality of sub-diversity receivers 23 are respectively used to realize diversity reception of corresponding 5G frequency band radio frequency signals. FIG. 2 only shows the situation that the first radio frequency transceiver module 2 includes three first radio frequency transceivers 21 of different 5G frequency bands. Exemplarily, the first radio frequency transceiver 21a and the corresponding first diversity receiver 22a, the first The sub-diversity receiver 231a and the second sub-diversity receiver 232a may correspond to radio frequency signals in the 5G n77 (uplink 3300-4200Mhz, downlink 3300-4200Mhz) and/or n78 (uplink 3300-3800Mhz, downlink 3300-3800Mhz) frequency bands. A radio frequency transceiver 21b and corresponding first diversity receiver 22b, first sub-diversity receiver 231b and second sub-diversity receiver 232b can correspond to radio frequency signals in the 5G n79 (uplink 4400-5000Mhz, downlink 4400-5000Mhz) frequency band , the first radio frequency transceiver 21c and the corresponding first diversity receiver 22c may correspond to radio frequency signals in the 5G n41 (uplink 2496-2690Mhz, downlink 2496-2690Mhz) frequency band. In practical applications, the first radio frequency transceiver module 2 may include More first radio frequency transceivers 21 of different 5G frequency bands and corresponding first diversity receivers 22 and multiple sub-diversity receivers 23, the number of sub-diversity receivers 23 can be determined in combination with the actual situation, so that the first radio frequency transceiver module 2 can realize the transmission and reception and diversity reception of radio frequency signals in different 5G frequency bands, expand the range of 5G communication frequency bands of radio frequency circuits, improve the reliability of radio frequency signal channel transmission, and meet the requirements of SRS signal transmission in different 5G frequency bands 1T2R.

Continuing to refer to FIG. 2, optionally, the first frequency division module 4 includes a first combiner 41 and a second combiner 42, and the second ends of a plurality of first radio frequency transceivers 21 are respectively connected to the first combiner 41 different first ends f, different second ends of the first diversity receiver 22 are connected to different first ends h of the second combiner 42, the second end g of the first combiner 41 and the second combiner The second end i of the device 42 is respectively connected to the first end a of the first switch 6 .

Specifically, both the first combiner 41 and the second combiner 42 can be radio frequency devices with multiple first terminals and one second terminal, and the first terminals of the first combiner 41 and the second combiner 42 As the input port of radio frequency signals of different frequency bands, the second end is used as the output port of radio frequency signals, and both the first combiner 41 and the second combiner 42 can combine the received radio frequency signals of multiple different frequency bands into one and send them to First switch 6. Fig. 2 only schematically shows the situation that the first combiner 41 includes three first terminals f1-f3, and the second combiner 42 includes three first terminals h1-h3. In practical applications, if the first radio frequency transceiver module 2 includes a plurality of first radio frequency transceivers 21 of different frequency bands and corresponding first diversity receivers 22, the number of the first radio frequency transceivers 21 can be selected to have the same first terminal f The number of first combiners 41 combined with the number of first diversity receivers 22 selects the second combiners 42 with the same number of first terminals h. In this way, the radio frequency signals of different 5G frequency bands sent by the first radio frequency transceivers 21 can be combined into one for transmission, and the first combiner 41 can receive radio frequency signals through one channel, and divide the received radio frequency signals separately Send to each first radio frequency transceiver 21; The second combiner 42 can receive the radio frequency signal through one channel, and then send the received radio frequency signal to each first diversity receiver 22 respectively after frequency division, through the first combiner Combiner 41 and second combiner 42 perform combination and frequency division, which is beneficial to reduce the number of radio frequency devices in the front and rear stages, and simplifies the structure of the radio frequency circuit.

FIG. 3 is a schematic diagram of a module structure of another radio frequency circuit provided by an embodiment of the present invention. As shown in FIG. 3 , optionally, the first frequency division module 4 includes a first combiner 41 and a second combiner 42 , and the radio frequency circuit further includes a second switch 61 and a third switch 62 . The first combiner 41 includes three first ends f and one second end g, the second combiner 42 includes three first ends h and one second end i, and the second switch 61 includes a plurality of first ends p and a second terminal b3, the third switch 62 includes a plurality of first terminals q and a second terminal b4, the second terminal b3 of the second switch 61 is connected to the second terminals of the two first radio frequency transceivers 21 respectively to different first terminals f of the first combiner 41, the second terminals of the remaining first radio frequency transceivers 21 are respectively connected to different first terminals p of the second switch 61, the second terminal b4 of the third switch 62 and the two The second ends of the first diversity receivers 22 are respectively connected to different first ends h of the second combiner 42, and the second ends of the remaining first diversity receivers 22 are respectively connected to different first ends of the third switch 62. q, the second terminal g of the first combiner 41 and the second terminal i of the second combiner 42 are respectively connected to the first terminal a of the first switch 6 .

Specifically, FIG. 3 shows that when the first radio frequency transceiver module 2 includes four first radio frequency transceivers 21 of different frequency bands and corresponding first diversity receivers 22 and multiple sub-diversity receivers 23, each radio frequency device in the radio frequency circuit In a connection situation, both the first combiner 41 and the second combiner 42 can be a three-terminal combiner with three first ends, and the second combiner can be set in combination with the number of four first radio frequency transceivers 21. Both the switch 61 and the third switch 62 are double-pole single-throw switches with two first ends and one second end, and any two of the four first radio frequency transceivers 21a-first radio frequency transceivers 21d are respectively connected to The two different first ends of the first combiner 41 connect the remaining first radio frequency transceivers 21 to the other first end of the first combiner 41 through the second switch 61, so that multiple first radio frequency transceivers All the radio frequency signals output by 21 can be combined into one channel by the first combiner 41 and sent out. Similarly, any two of the four first diversity receivers 22a-first diversity receiver 22d can be connected to two different first ends of the second combiner 42 respectively, and the rest of the first diversity receivers 22 The second combiner 42 is connected to the other first end of the second combiner 42 through the third switch 62 , so that the second combiner 42 can divide the frequency of a received radio frequency signal and send it to multiple first diversity receivers 22 . The setting of the second switch 61 and the third switch 62 can reduce the connection of multiple first radio frequency transceivers 21 to the first combiner 41, and the connection of multiple first diversity receivers 22 to the second combiner 42. Trace length, thereby reducing the layout area of the RF circuit.

2 and 3, optionally, the first switch 6 includes a plurality of first ends a and a plurality of second ends b, the second end g of the first combiner 41 and the second end g of the second combiner 42 The two terminals i are respectively connected to different first terminals a of the first switch 6 . Specifically, when the first frequency division module 4 includes two combiners, and the first radio frequency transceiver module 2 is correspondingly provided with two antennas 7, the first switch 6 can be set as a double-pole double-throw switch, so that the first switch The radio frequency signal received by the first end a1 and the first end a2 of 6 can be sent out through the antenna 71 connected to the second end b1 or the antenna 72 connected to the second end b2, and the radio frequency signal received by the antenna 71 and the antenna 72 Alternatively, the first end a1 or the first end a2 of the first switch 6 can be selected for output, and the antenna 7 is multiplexed for sending and receiving radio frequency signals, increasing the number of channels for transmitting radio frequency signals.

With reference to Fig. 2 and Fig. 3, optionally, the second radio frequency transceiving module 3 comprises the second radio frequency transceiver 31 of the second frequency band and the second diversity receiver 32, the second radio frequency transceiver 31 and the second diversity receiver 32 The first terminals are respectively connected to different radio frequency signal terminals c of the radio frequency control module 1 , and the second terminals of the second radio frequency transceiver 31 and the second diversity receiver 32 are respectively connected to the second frequency dividing module 5 . Optionally, the second frequency band includes an LTE frequency band.

Specifically, the second radio frequency transceiver module 3 may be a radio frequency module based on diversity reception technology, the second radio frequency transceiver 31 is used to realize the reception and transmission of radio frequency signals in different frequency bands in the LTE frequency band, and the second diversity receiver 32 is used for To realize the diversity reception of radio frequency signals in the corresponding LTE frequency band, the radio frequency control module 1 can also control the second radio frequency transceiver module 3 to multiplex to 5G communication in the independent working mode, through the second radio frequency transceiver 31 and the second diversity receiver 32 Receiving two-way diversity radio frequency signals, Fig. 2 shows the situation that the second radio frequency transceiver 31 and the second diversity receiver 32 are multiplexed to receive the radio frequency signals of the 5G frequency band corresponding to the first radio frequency transceiver 21c, Fig. 3 It shows that the second radio frequency transceiver 31 and the second diversity receiver 32 are multiplexed to receive the diversity reception of the radio frequency signal of the 5G frequency band corresponding to the first radio frequency transceiver 21d, so that 4G communication and 5G communication can be realized simultaneously in the radio frequency circuit At the same time, the number of radio frequency devices in the radio frequency circuit can be reduced, which is beneficial to simplify the radio frequency circuit.

Referring to Fig. 2, optionally, the second frequency division module 5 includes a third combiner 51 and a fourth combiner 52, and the second end of the second radio frequency transceiver 31 and different first sub-diversity receivers 231 are respectively connected To the different first ends j of the third combiner 51, the second ends of the second diversity receiver 32 and different second sub-diversity receivers 232 are respectively connected to different first ends n of the fourth combiner 52, the second The second end k of the three combiner 51 and the second end m of the fourth combiner 52 are respectively connected to different antennas 7 .

Specifically, the radio frequency signals of different LTE frequency bands output by the second radio frequency transceiver 31 can be sent out through the third combiner 51 and the antenna 73, and the 5G or LTE radio frequency signals of different frequency bands received by the antenna 73 can also be transmitted through the third The combiner 51 sends frequency division to the first sub-diversity receiver 231a, the first sub-diversity receiver 231b and the second radio frequency transceiver 31, and the 5G or LTE radio frequency signals of different frequency bands received by the antenna 74 can pass through the fourth combined circuit 52 to divide the frequency and send to the second diversity receiver 32, the second sub-diversity receiver 232a and the second sub-diversity receiver 232b. Both the third combiner 51 and the fourth combiner 52 can be radio frequency devices with multiple first terminals and one second terminal. FIG. 2 only schematically shows that the third combiner 51 includes three first end j1-j3, the fourth combiner 52 includes the situation of three first end n1-n2, in practical application, can combine the number of the first sub-diversity receiver 231 and the multiplexing situation of the second radio frequency transceiver 31 to select There is a third combiner 51 corresponding to the number of first terminals j, and a fourth combiner with a corresponding number of first terminals n is selected in combination with the number of second sub-diversity receivers 232 and the multiplexing situation of the second diversity receiver 32 52. In this way, the antenna 73 and the antenna 74 corresponding to the 4G communication setting can also be multiplexed for the diversity reception of the radio frequency signals of different 5G frequency bands while transmitting and receiving radio frequency signals of different LTE frequency bands, effectively utilizing the antenna 73 and the antenna 74, reducing the radio frequency The number of antennas 7 in the circuit simplifies the structure of the radio frequency circuit.

3, optionally, the second frequency division module 5 includes a third combiner 51 and a fourth combiner 52, the radio frequency circuit also includes a fourth switch 63 and a fifth switch 64, and the third combiner 51 includes Three first terminals j and one second terminal k, the fourth combiner 52 each includes three first terminals n and one second terminal m, and the fourth switch 63 includes multiple first terminals r and one second terminal b5, the fifth switch 64 includes a plurality of first terminals s and a second terminal b6, the second terminal b5 of the fourth switch 63, the second terminal of the second radio frequency transceiver 31 and a first sub-diversity receiver 231 The second ends are respectively connected to different first ends j of the third combiner 51, the second ends of the remaining first sub-diversity receivers 231 are respectively connected to different first ends r of the fourth switch 63, and the second ends of the fifth switch 64 The second terminal b6, the second terminal of the second diversity receiver 32 and the second terminal of a second sub-diversity receiver 232 are respectively connected to different first terminals n of the fourth combiner 52, and the remaining second sub-diversity receivers The second end of the switch 232 is respectively connected to different first ends s of the fifth switch 64, and the second end k of the third combiner 51 and the second end m of the fourth combiner 52 are connected to different antennas 7 respectively.

Specifically, FIG. 3 shows that the first radio frequency transceiver 21a is correspondingly provided with a first sub-diversity receiver 231a and a second sub-diversity receiver 232a, and the first radio frequency transceiver 21b is correspondingly provided with a first sub-diversity receiver 231b and a The second sub-diversity receiver 232b, the first radio frequency transceiver 21c is correspondingly provided with the first sub-diversity receiver 231c and the second sub-diversity receiver 232c, the second radio frequency transceiver 31 and the second diversity receiver 32 can be multiplexed as When the two sub-diversity receivers of the first radio frequency transceiver 21d are set in the radio frequency circuit, the third combiner 51 and the fourth combiner 52 can all be three-terminal combiners with three first ends, which can be combined The quantity of the first radio frequency transceiver 21 and the multiplexing situation of the second radio frequency transceiver 31 and the second diversity receiver 32 set the fourth switch 63 and the fifth switch 64, both of which have two first ends and one second end. pole single-throw switch, the second radio frequency transceiver 31 and any one of the first sub-diversity receivers 231 are respectively connected to two different first ends j of the third combiner 51, and the rest of the first sub-diversity receivers 231 It is connected to the other first end j of the third combiner 51 through the fourth switch 63, which can not only ensure the transmission efficiency of radio frequency signals in the LTE frequency band, but also realize diversity reception of multiple radio frequency signals in different 5G frequency bands. Similarly, the second diversity receiver 32 and any second sub-diversity receiver 232 can be connected to two different first terminals n of the fourth combiner 52 respectively, and the remaining second sub-diversity receivers 232 can be connected through the second The five switches 64 are connected to the other first terminal n of the fourth combiner 52, so as to not only ensure the diversity reception efficiency of radio frequency signals in the LTE frequency band, but also realize the diversity reception of multiple radio frequency signals in different 5G frequency bands. The setting of the fourth switch 63 and the fifth switch 64 can reduce the connection of the plurality of first sub-diversity receivers 231 to the third combiner 51 and the connection of the plurality of second sub-diversity receivers 232 to the fourth combiner. The trace length of 52, thereby reducing the layout area of the radio frequency circuit.

FIG. 4 is a schematic diagram of a module structure of another radio frequency circuit provided by an embodiment of the present invention. As shown in Figure 4, optionally, the radio frequency control module 1 includes a radio frequency chip 11 and a baseband chip 12, the radio frequency chip 11 is electrically connected to the baseband chip 12, and the radio frequency chip 11 is connected to the first radio frequency transceiver module 2 and the second radio frequency transceiver module respectively 3. The first frequency division module 4 , the second frequency division module 5 and the first switch 6 are electrically connected. Specifically, the baseband chip 12 can be used to synthesize the radio frequency signal to be transmitted by the radio frequency circuit, and decode the received radio frequency signal. When transmitting a radio frequency signal, the audio signal is compiled into a baseband code; when receiving a signal, the baseband code is decoded into an audio signal. At the same time, the baseband chip 12 is also responsible for compiling address information, text information and image information. The baseband chip 12 can support multiple network standards, such as 2G, 3G, 4G, 5G and WiFi. The baseband chip 12 may include various functional units such as a CPU processor, a channel encoder, a digital signal processor, a modem, and an interface module. The radio frequency chip 11 can be a radio frequency front-end chip, and the baseband chip 12 can control the first radio frequency transceiver module 2 and the second radio frequency transceiver module 3 to receive and send radio frequency signals of different frequency bands through the radio frequency chip 11, and control the first frequency division module 4 and the second frequency division module 4. The frequency division module 5 performs frequency combination or frequency division, and controls the first switch 6 to select a channel for transmitting or receiving radio frequency signals.

FIG. 5 is a schematic diagram of a module structure of another radio frequency circuit provided by an embodiment of the present invention. As shown in Figure 5, optionally, the radio frequency chip 11 is electrically connected to the first radio frequency transceiver module 2 and the second radio frequency transceiver module 3, respectively, and the baseband chip 12 is respectively connected to the first frequency division module 4, the second frequency division module 5 and the The first switch 6 is electrically connected. Specifically, the baseband chip 12 can control the first radio frequency transceiver module 2 and the second radio frequency transceiver module 3 to receive and send radio frequency signals of different frequency bands through the radio frequency chip 11, and the baseband chip 12 can also directly control the first radio frequency transceiver module 2 and the second radio frequency transceiver module 2. The radio frequency transceiver module 3 receives and sends radio frequency signals of different frequency bands, controls the first frequency division module 4 and the second frequency division module 5 to combine or divide frequencies, and controls the first switch 6 to select the channel for transmitting or receiving radio frequency signals.

FIG. 6 is a schematic structural diagram of a terminal device provided by an embodiment of the present invention. As shown in FIG. 6 , the terminal device 100 includes a radio frequency circuit (not shown in FIG. 6 ) provided by the embodiment of the present invention. Fig. 6 schematically shows the situation that the terminal device 100 is a mobile phone. In actual application, the terminal device 100 can also be other intelligent terminal devices with communication functions, such as: the terminal device 100 can be but not limited to various personal computers, notebook computers , smartphones, tablet computers, and portable wearable devices, which are not limited in this embodiment of the present invention. The terminal device provided by the embodiment of the present invention includes the radio frequency circuit provided by the above-mentioned embodiments of the present invention, so it has the above-mentioned beneficial effects, and details are not repeated here.

Note that the above are only preferred embodiments of the present invention and applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and can also include more other equivalent embodiments without departing from the concept of the present invention, and the present invention The scope is determined by the scope of the appended claims.

Claims (11)

1. A radio frequency circuit, characterized in that, comprising: A radio frequency control module, a first radio frequency transceiver module, a second radio frequency transceiver module, a first frequency division module, a second frequency division module, a first switch and multiple antennas; The first radio frequency transceiver module is connected to the first end of the first switch through the first frequency division module, at least two antennas are respectively connected to different second ends of the first switch, and the first A radio frequency transceiver module and the second radio frequency transceiver module are connected to at least two antennas through the second frequency division module, and the antennas connected to the first switch and the second frequency division module are different; The radio frequency control module is used to control the first radio frequency transceiver module to transmit and receive radio frequency signals in the first frequency band through the first frequency division module, the first switch and the corresponding antenna, and control the first The radio frequency transceiver module and the second radio frequency transceiver module respectively perform the reception of the radio frequency signal of the first frequency band and the radio frequency signal of the second frequency band through the second frequency division module and the corresponding antenna, and the radio frequency signal of the first frequency band The signal coincides with at least part of the frequency band of the radio frequency signal in the second frequency band; In the non-independent working mode, the radio frequency control module controls the first radio frequency transceiver module to use the first frequency division module, the first switch and at least two antennas to realize the radio frequency signal transmission of the first frequency band in turn , and controlling the second radio frequency transceiving module to use the second frequency division module and at least two antennas to realize the transceiving of the radio frequency signal in the second frequency band and the reception of part of the radio frequency signal in the first frequency band; In the independent working mode, the radio frequency control module controls the second radio frequency transceiving module to be multiplexed to transmit and receive radio frequency signals in the first frequency band. 2. The radio frequency circuit according to claim 1, wherein the first frequency band includes a 5G frequency band, and the second frequency band includes an LTE frequency band. 3. The radio frequency circuit according to claim 1, wherein the first radio frequency transceiver module comprises: A plurality of first radio frequency transceivers of different first frequency bands, and a first diversity receiver and a plurality of sub-diversity receivers corresponding to each of the first radio frequency transceivers, the sub-diversity receivers include a first sub-diversity receiver a diversity receiver and a second sub-diversity receiver; The radio frequency control module includes a plurality of radio frequency signal terminals, and the first terminals of the first radio frequency transceiver, the first diversity receiver, the first sub-diversity receiver, and the second sub-diversity receiver are respectively Connected to different radio frequency signal ends of the radio frequency control module, the first radio frequency transceiver and the second end of the first diversity receiver are respectively connected to the first frequency division module, and the first sub-diversity receiver and the second end of the second sub-diversity receiver are connected to the second frequency division module. 4. The radio frequency circuit according to claim 3, wherein the first frequency division module comprises a first combiner and a second combiner, and the second ends of a plurality of the first radio frequency transceivers are respectively connected to different first terminals of the first combiner, second terminals of different first diversity receivers connected to different first terminals of the second combiner, the first combiner and the The second ends of the second combiner are respectively connected to the first ends of the first switches. 5. The radio frequency circuit according to claim 3, wherein the first frequency division module comprises a first combiner and a second combiner, and the first combiner and the second combiner Each includes three first ends and one second end; The radio frequency circuit also includes: The second switch and the third switch, each of the second switch and the third switch includes a plurality of first terminals and one second terminal, and the second terminal of the second switch communicates with the two first radio frequency transceivers The second terminals of the first combiner are respectively connected to different first terminals of the first combiner, and the second terminals of the other first RF transceivers are respectively connected to different first terminals of the second switch, and the first The second ends of the three switches and the second ends of the two first diversity receivers are respectively connected to different first ends of the second combiner, and the second ends of the remaining first diversity receivers are respectively connected to To the different first terminals of the third switch, the second terminals of the first combiner and the second combiner are respectively connected to the first terminal of the first switch. 6. The radio frequency circuit according to claim 4 or 5, wherein the first switch comprises a plurality of first terminals and a plurality of second terminals, and the first combiner and the second combiner The second ends of the switches are respectively connected to different first ends of the first switch. 7. The radio frequency circuit according to claim 3, wherein the second radio frequency transceiver module comprises a second radio frequency transceiver and a second diversity receiver of a second frequency band; The first ends of the second radio frequency transceiver and the second diversity receiver are respectively connected to different radio frequency signal ends of the radio frequency control module, the second radio frequency transceiver and the second diversity receiver and the The aforementioned second ends are respectively connected to the second frequency dividing module. 8. The radio frequency circuit according to claim 7, wherein the second frequency division module includes a third combiner and a fourth combiner, and the second radio frequency transceiver is different from the first sub-diversity The second ends of the receivers are respectively connected to different first ends of the third combiner, and the second ends of the second diversity receiver and different second sub-diversity receivers are respectively connected to the fourth Different first ends of the combiners, and second ends of the third combiner and the fourth combiner are respectively connected to different antennas. 9. The radio frequency circuit according to claim 7, wherein the second frequency division module comprises a third combiner and a fourth combiner, and the third combiner and the fourth combiner Each includes three first ends and one second end; The radio frequency circuit also includes a fourth switch and a fifth switch, each of the fourth switch and the fifth switch includes a plurality of first terminals and a second terminal, the second terminal of the fourth switch, the The second end of the second radio frequency transceiver and the second end of one of the first sub-diversity receivers are respectively connected to different first ends of the third combiner, and the first ends of the other first sub-diversity receivers The two terminals are respectively connected to different first terminals of the fourth switch, the second terminal of the fifth switch, the second terminal of the second diversity receiver and the second terminal of one of the second sub-diversity receivers terminals are respectively connected to different first terminals of the fourth combiner, and the second terminals of the remaining second sub-diversity receivers are respectively connected to different first terminals of the fifth switch, and the third combined circuit and the second end of the fourth combiner are respectively connected to different antennas. 10. The radio frequency circuit according to claim 1, wherein the radio frequency control module comprises a radio frequency chip and a baseband chip, and the radio frequency chip is electrically connected to the baseband chip; The radio frequency chip is electrically connected to the first radio frequency transceiver module, the second radio frequency transceiver module, the first frequency division module, the second frequency division module and the first switch; or the radio frequency The chip is electrically connected to the first radio frequency transceiver module and the second radio frequency transceiver module, and the baseband chip is electrically connected to the first frequency division module, the second frequency division module and the first switch. . 11. A terminal device, comprising the radio frequency circuit according to any one of claims 1-10.

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