WO2017088425A1

WO2017088425A1 - Radio frequency apparatus and communication terminal

Info

Publication number: WO2017088425A1
Application number: PCT/CN2016/084096
Authority: WO
Inventors: 罗培伟; 闫新远; 何华
Original assignee: 宇龙计算机通信科技(深圳)有限公司
Priority date: 2015-11-26
Filing date: 2016-05-31
Publication date: 2017-06-01
Also published as: CN106803760B; CN106803760A

Abstract

Provided is a radio frequency apparatus, comprising a radio frequency front-end module, a power amplification module, a radio frequency transceiving module, a plurality of duplexers and a switching circuit. The radio frequency front-end module comprises a plurality of radio frequency switching ports, wherein each of the radio frequency switching ports is respectively connected to the power amplification module and the radio frequency transceiving module by means of a duplexer. The plurality of radio frequency switching ports comprise a multiplexing switching port connected to the switching circuit. The plurality of duplexers comprise a first duplexer and a second duplexer connected to the switching circuit. The switching circuit is used to connect the multiplexing switching port and the first duplexer to form a first switching path, or connect the multiplexing switching port and the second duplexer to form a second switching path. Also provided is a communication terminal. By providing the switching circuit, the radio frequency apparatus can realize design of communication terminals within different frequency band ranges on the same board.

Description

Radio frequency device and communication terminal

The present application claims priority to Chinese Patent Application No. 201510837558.X, entitled "RF Device and Communication Terminal", filed on November 26, 2015, the entire contents of which is incorporated herein by reference. .

Technical field

The present invention relates to the field of communications, and in particular, to a radio frequency device and a communication terminal.

Background technique

With the rapid development of communication technologies, technologies such as Long Term Evolution (LTE) and Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) are becoming more mature and can cover multiple standards. And multi-band intelligent communication terminals have become the mainstream of the communication terminal market. To achieve multi-standard and multi-band coverage, it will undoubtedly increase the complexity of the RF front-end circuit of the communication terminal. The more frequency bands a communication terminal needs to cover, the more RF switching ports are required in the RF front-end circuit, and the procurement cost of the RF front-end module with a larger number of RF switching ports is relatively higher. To reduce production costs, vendors typically use different RF front-end modules for products that cover different frequency ranges. For example, a product with a small frequency band coverage adopts a radio frequency front-end module with a relatively small number of radio frequency switching ports; for a product with a large frequency band coverage, a radio frequency switching port with a relatively large number of radio frequency switching ports is used.

However, since the same product may need to cover different frequency ranges due to different sales regions, if the printed circuit board (PCB) layout design is separately designed for products covering different frequency ranges, it will undoubtedly increase the difficulty of PCB debugging. , resulting in increased production costs. Therefore, how to realize the PCB common board design covering the same product in different frequency ranges to reduce the difficulty of PCB debugging and reduce the production cost is an urgent problem to be solved in the field of communication terminal design.

Summary of the invention

In view of the problems in the prior art, the present invention provides a radio frequency device by setting a switching power The road, under the condition of limited RF switching port, realizes coverage of more frequency bands, and realizes PCB common board design of communication terminals in different frequency ranges, thereby reducing PCB debugging difficulty and reducing production cost.

In addition, the present invention also provides a communication terminal to which the radio frequency device is applied.

A radio frequency device includes a radio frequency front end module, a power amplifying module, a radio frequency transceiver module, a plurality of duplexers and a switching circuit;

The radio frequency front-end module includes a plurality of radio frequency switching ports, and each of the radio frequency switching ports is respectively connected to the power amplifying module and the radio frequency transceiver module through a duplexer;

A plurality of the radio frequency switching ports include a multiplexing switching port connected to the switching circuit; and the plurality of duplexers include a first duplexer and a second duplexer connected to the switching circuit;

The switching circuit is configured to connect the multiplexing switching port with the first duplexer to form a first switching path; or connect the multiplexing switching port with the second duplexer to form The second switching path.

Wherein the switching circuit includes a first pad, a second pad, a third pad, and a fourth pad disposed side by side or side by side, the first pad being connected to the first duplexer, The second pad is connected to the first multiplex switch port, the third pad is connected to the second duplexer, and the fourth pad is suspended.

The switching circuit further includes a first resistor, two ends of the first resistor are respectively connected to the first pad and the second pad, and the multiplexing switching port passes the first resistor and the The first duplexer is connected to form a first switching path.

The switching circuit further includes a second resistor, two ends of the second resistor are respectively connected to the second pad and the third pad, and the multiplexing switching port passes the second resistor and the The second duplexer is connected to form a second switching path.

A plurality of the radio frequency switching ports include a first switching port and a second switching port connected to the switching circuit; and the plurality of duplexers include a first duplexer and a second connected to the switching circuit Diplexer;

The switching circuit is configured to connect the first switching port with the first duplexer to form a first switching path; and connect the second switching port with the second duplexer to form The second switching path.

Wherein the switching circuit includes a first pad, a second pad, a third pad, and a fourth pad disposed side by side or side by side, the first pad being connected to the first duplexer, A second pad is connected to the first switching port, the third pad is connected to the second duplexer, and the fourth pad is connected to the second switching port.

The switching circuit further includes a first resistor, two ends of the first resistor are respectively connected to the first pad and the second pad, and the first switching port passes the first resistor and the The first duplexer is connected to form a first switching path.

The switching circuit further includes a third resistor, two ends of the third resistor are respectively connected to the third pad and the fourth pad, and the second switching port passes the third resistor and the The second duplexer is connected to form a second switching path.

A communication terminal includes a radio frequency device, and the radio frequency device includes a radio frequency front end module, a power amplification module, a radio frequency transceiver module, a plurality of duplexers, and a switching circuit;

The first switching path is used to turn on the radio frequency signal in the first frequency band, where the first frequency band is the B34 frequency band in the TDS system or the B39 frequency band or the B40 frequency band in the TDD-LTE system; the second switching The path is used to turn on the radio frequency signal in the second frequency band, and the second frequency band is the BC0 frequency band in the CDMA system or the B1 frequency band in the FDD-LTE system.

The radio frequency device connects the multiplexing switch port to the first duplexer through the switching circuit to form a first switching path; or the multiplexing switching port and the second duplex The devices are connected to form a second switching path; thereby implementing multiplexing of the radio frequency switching ports, which can effectively reduce the production cost of the communication terminal. In another aspect, the radio frequency device connects the first switching port with the first duplexer through the switching circuit to form a first switching path; and the second switching port and the second The duplexers are connected to form a second switching path, thereby realizing PCB common board design of communication terminals in different frequency ranges, which can reduce PCB debugging difficulty.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

1 is a schematic structural view of a radio frequency device according to a first embodiment of the present invention;

2 is another schematic structural view of a radio frequency device according to a first embodiment of the present invention;

3 is a schematic structural view of a radio frequency device according to a second embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Referring to FIG. 1 and FIG. 2, a first embodiment of the present invention provides a radio frequency device 100, which is applied to a communication terminal such as a smart phone or a tablet computer to implement transmission and reception of radio frequency signals in multiple frequency bands.

The radio frequency device 100 includes a radio frequency front end module 110, a power amplifying module 130, a radio frequency transceiver module 150, a plurality of duplexers 170, and a switching circuit 190.

The radio frequency front end module 110 includes a plurality of radio frequency switching ports TRx, and each of the radio frequency switching ports TRx is connected to the power amplifying module 130 and the radio frequency transceiver module 150 through a duplexer 170. Each of the radio frequency switching ports TRx is configured to conduct radio frequency signals of at least one frequency band. In FIG. 1, the frequency band of the radio frequency signal corresponding to each of the radio frequency switching ports TRx is represented by a “TRx_band code number”, for example, “TRx_B1” indicates that the radio frequency switching port TRx is corresponding to the radio frequency of the B1 frequency band. The signal “TRx_B40/BC0” indicates that the RF switching port TRx corresponds to the RF signal of the B40 band or the RF signal of the BC0 band.

A plurality of the radio frequency switching ports TRx includes a multiplexing switching port 111 connected to the switching circuit 190, and the plurality of the duplexers 170 include a first duplexer 171 and a first connection with the switching circuit 190. Two duplexers 172.

The switching circuit 190 is configured to connect the multiplexing switch port 111 with the first duplexer 171 to form a first switching path; or to use the multiplexing switching port 111 and the second duplexer 172 are connected to form a second switching path.

Specifically, the switching circuit 190 includes a first pad 191, a second pad 193, a third pad 195, and a fourth pad 197 disposed side by side or side by side, the first pad 191 and the first The duplexer 171 is connected, the second pad 193 is connected to the first multiplexing switch port 111, and the third pad 195 is connected to the second duplexer 172, the fourth pad 197 Dangling settings. The first pad 191, the second pad 193, the third pad 195, and the fourth pad 197 are spaced apart from each other and have no electrical connection relationship.

The switching circuit 190 further includes a first resistor R1 or a second resistor R2. Referring to FIG. 1 , two ends of the first resistor R1 are respectively connected to the first pad 191 and the second pad 193 , and the multiplexing switch port 111 passes through the first resistor R1 and the first The duplexers 171 are connected to form a first switching path. Alternatively, referring to FIG. 2, two ends of the second resistor R2 are respectively connected to the second pad 193 and the third pad 195, and the multiplexing switching port 111 passes through the second resistor R2 and the The second duplexer 172 is connected to form a second switching path. Wherein the first switching path is used Turning on the radio frequency signal of the first frequency band; the second switching path is used to turn on the radio frequency signal of the second frequency band. In this embodiment, the resistances of the first resistor R1 and the second resistor R2 are both zero ohms, the first resistor R1 is used to turn on the first switching path, and the second resistor R2 And the second switching path is turned on, and the first switching path and the second switching path are not turned on at the same time.

Referring to FIG. 1 , when the two ends of the first resistor R1 are respectively connected to the first pad 191 and the second pad 193 , the multiplexing switching port 111 is turned on by the first switching path. A band of RF signals. Referring to FIG. 2, when both ends of the second resistor R2 are respectively connected to the second pad 193 and the third pad 195, the multiplexing switching port 111 is turned on by the second switching path. Two-band RF signal. The power amplifying module 130 may be a first amplifying module or a second amplifying module. When the multiplex switching port 111 turns on the radio frequency signal of the first frequency band by using the first switching path, the power amplifying module 130 is a first amplifying module; when the multiplexed switching port 111 turns on the radio frequency signal of the second frequency band through the second switching path, the power amplifying module 130 is a second amplifying module. The number of pins and the package structure of the first amplifying module are the same as the number of pins and the package structure of the second amplifying module.

In this embodiment, the radio frequency device 100 turns on the first switching path through the first resistor R1, or turns on the second switching path through the second resistor R2, and passes the Setting the power amplification module 130 as the first amplification module when the resistor R1 is turned on by the first switching path, or setting the power amplification when the second switching path is turned on by the second resistor R2 The module 130 is the second amplifying module, so that the radio frequency device 100 can switch different radio frequencies by setting different switching paths and corresponding amplifying modules under the same Printed Circuit Board (PCB) layout. The communication mode realizes the common board design of the RF communication products under different RF communication modes, which is beneficial to reduce the production cost.

Specifically, the radio frequency device 100 can implement radio frequency signal transceiving in the first radio frequency communication mode by setting the first resistor R1 and the first amplifying module; or by setting the second resistor R2 and the The second amplifying module is configured to implement radio frequency signal transceiving in the second radio frequency communication mode. In this embodiment, the first radio frequency communication mode is a mobile three-mode, the second radio frequency communication mode is a telecommunications tri-mode; the radio-frequency front-end module 110 is a SKY77910, which includes eight radio frequency switching ports TRx; The first amplification module is SKY77824, the second amplification module is SKY77643, and the radio transceiver module 150 is WTR4905. The communication frequency band of the first radio frequency communication mode includes the GSM standard B2, B3, B8 bands, B34, B39 bands in TDS and B38, B39 and B40 bands in TDD-LTE. The B39 frequency band in the TDS system is repeated with the B39 frequency band in the TDD-LTE standard, and one RF switching port TRx can be multiplexed. Therefore, to implement the first radio frequency communication mode, it is required to occupy seven radio frequency switching ports TRx in the radio frequency front end module 110. The communication frequency band of the second radio frequency communication mode includes the B2, B3, and B8 frequency bands in the GSM standard, the BC0 frequency band in the CDMA system, the B1 and B3 frequency bands in the FDD-LTE standard, and the B41 frequency band in the TDD-LTE standard. The B3 frequency band in the GSM system is repeated with the B3 frequency band in the FDD-LTE system, and one radio frequency switching port TRx can be multiplexed. Therefore, to implement the second radio frequency communication mode, six radio frequency switching ports TRx of the radio frequency front end module 110 need to be occupied.

According to the foregoing analysis, a common board design of the first radio frequency communication mode and the second radio frequency communication mode is implemented, and the B2, B3, and B8 frequency bands in the GSM system of the second radio frequency communication mode may be in communication with the first radio frequency. The B2, B3, and B8 bands in the GSM mode are respectively multiplexed with one radio frequency switching port TRx; the B3 band in the FDD-LTE system can be multiplexed with the B3 band in the GSM system with a radio frequency switching port TRx; the TDD The B41 frequency band in the LTE system may be multiplexed with the B38 frequency band in the TDD-LTE system of the first radio frequency communication mode by one radio frequency switching port TRx. In this way, the four radio frequency switching ports TRx in the radio frequency front end module 110 are required to be occupied, and the B34 and B39 frequency bands in the TDS system of the first radio frequency communication mode and the B40 frequency band in the TDD-LTE standard are required to be occupied. A radio frequency switching port TRx requires a total of seven radio frequency switching ports TRx. At this time, if the BC0 band in the CDMA system of the second radio frequency communication mode and the B1 band in the FDD-LTE system are added, at least nine radio frequency switching ports TRx are required.

The BC0 frequency band in the CDMA system of the second radio frequency communication mode and the B1 frequency band in the FDD-LTE system and the B34 and B39 frequency bands in the TDS system of the first radio frequency communication mode and the B40 frequency band in the TDD-LTE system The frequency range is different, and there is no multiplexing of the radio frequency switching port TRx in the foregoing analysis. Therefore, in this embodiment, the B40 frequency band in the TDD-LTE standard of the first radio frequency communication mode is used. The occupied radio frequency switching port TRx is set to the multiplexing switching port 111 to multiplex one radio frequency switching port TRx with the BC0 frequency band in the CDMA system of the second radio frequency communication mode. At the same time, by setting the first switching path and the second switching path, when the first radio frequency communication mode needs to be implemented, the first switching path is turned on by the first resistor R1, and the power amplification is set. Module 130 is a first amplification module, namely SKY77824, Therefore, the radio frequency signal of the first frequency band, that is, the radio frequency signal of the B40 frequency band in the TDD-LTE system, is turned on by the multiplexing switching port 111 and the first switching path; when the second radio frequency communication mode needs to be implemented, The second resistor R2 is connected to the second switching path, and the power amplifying module 130 is configured as a second amplifying module, that is, SKY 77643, thereby being turned on by the multiplexing switching port 111 and the second switching path. The radio frequency signal of the second frequency band, that is, the radio frequency signal of the BC0 frequency band under the CDMA system.

It can be understood that the first frequency band may be the B34 frequency band in the TDS system or the B39 frequency band or the B40 frequency band in the TDD-LTE system; the second frequency band may be the BC0 frequency band in the CDMA system or the FDD-LTE system. B1 band.

Referring to FIG. 3, a second embodiment of the present invention provides a radio frequency device 300, which is applied to a communication terminal such as a smart phone or a tablet computer to implement transmission and reception of radio frequency signals in multiple frequency bands.

The radio frequency device 300 includes a radio frequency front end module 30, a power amplifying module 330, a radio frequency transceiver module 350, a plurality of duplexers 370, and a switching circuit 390.

The radio frequency front end module 310 includes a plurality of radio frequency switching ports TRx, and each of the radio frequency switching ports TRx is connected to the power amplifying module 330 and the radio frequency transceiver module 350 through a duplexer 370. Each of the radio frequency switching ports TRx is configured to conduct radio frequency signals of at least one frequency band. In FIG. 3, the frequency band of the radio frequency signal corresponding to each of the radio frequency switching ports TRx is represented by a “TRx_band code number”, for example, “TRx_B1” indicates that the radio frequency switching port TRx is corresponding to the radio frequency of the B1 frequency band. The signal "TRx_B38/B41" indicates that the radio frequency switching port TRx corresponds to the radio frequency signal of the B38 band or the radio frequency signal of the B41 band.

A plurality of the radio frequency switching ports TRx includes a first switching port 311 and a second switching port 312 connected to the switching circuit 390, and the plurality of the duplexers 370 include a first one connected to the switching circuit 390. The duplexer 371 and the second duplexer 372.

The switching circuit 390 is configured to connect the first switching port 311 with the first duplexer 371 to form a first switching path; and connect the second switching port 312 with the second duplexer 372 is connected to form a second switching path.

Specifically, the switching circuit 390 includes a first pad 391, a second pad 393, a third pad 395, and a fourth pad 397 disposed side by side or side by side, the first pad 391 and the first The duplexer 371 is connected, the second pad 393 is connected to the first switching port 311, and the third pad 395 Connected to the second duplexer 372, the fourth pad 397 is connected to the second switching port 312.

The switching circuit further includes a first resistor R1 and a third resistor R3. The two ends of the first resistor R1 are respectively connected to the first pad 391 and the second pad 393, and the first switching port 311 passes The first resistor R1 is coupled to the first duplexer 371 to form a first switching path. The two ends of the third resistor R3 are respectively connected to the third pad 395 and the fourth pad 397, and the second switching port 312 is connected to the second duplexer 372 through the third resistor R3. To form a second switching path. The first switching path is used to turn on the radio frequency signal of the first frequency band, and the second switching path is used to turn on the radio frequency signal of the second frequency band. In this embodiment, the resistances of the first resistor R1 and the third resistor R3 are both zero ohms, the first resistor R1 is used to turn on the first switching path, and the third resistor R3 And the second switching path is turned on, and the first switching path and the second switching path are simultaneously turned on.

In this embodiment, the radio frequency device 300 is configured to implement communication in a third radio frequency communication mode, the radio frequency front end module 310 is a SKY77912, which includes 10 radio frequency switching ports TRx; the power amplifying module 330 is SKY77643, that is, The second amplification module in the first embodiment; the radio frequency transceiver module 350 is WTR4905. The third radio frequency communication mode is a full network communication mode, and the communication frequency band includes at least B2, B3, and B8 frequency bands in the GSM standard, B34 and B39 frequency bands in the TDS system, and B38, B39, and B40 in the TDD-LTE standard mode. And the B41 frequency band, the BC0 frequency band under the CDMA system and the B1, B3, and B7 frequency bands under the FDD-LTE standard. Compared with the first radio frequency communication mode and the second radio frequency communication mode in the first embodiment, the communication frequency band of the third communication mode only has one more B7 frequency band in the FDD-LTE system, and therefore, according to the first implementation The analysis in the example shows that to achieve communication in the third radio communication mode, at least 10 radio frequency switching ports TRx are required.

In this embodiment, since the third radio frequency communication mode includes the first radio frequency communication mode and the second radio frequency communication mode, the radio frequency signal of the first frequency band and the radio frequency signal of the second frequency band need to be simultaneously Turn on. The RF front-end module 310 in this embodiment has two RF switching ports TRx compared to the RF front-end module 110 in the first embodiment, so that the switching switch 111 is switched by the multiplexing switch 111 in the first embodiment. The radio frequency signal of the first frequency band and the radio frequency signal of the second frequency band are respectively turned on by the first switching port 311 and the second switching port 312 in this embodiment. Specifically, one of the two radio frequency switching ports TRx of the radio frequency front end module 310 may be used as the first switching port 311 or the second switching port 312; and the B7 frequency band in the FDD-LTE system may be used. The radio frequency signal is turned on by the other of the two radio frequency switching ports TRx of the radio frequency front end module 310, so that the communication in the third radio frequency communication mode can be realized.

In addition, the present invention further provides a communication terminal, including the radio frequency device 100 according to the first embodiment of the present invention, or the radio frequency device 300 according to the second embodiment of the present invention.

It is to be understood that the functions of the respective modules of the

radio frequency devices

100 and 300 and their implementations may be referred to the related descriptions in the first embodiment and the second embodiment of the present invention, and details are not described herein again.

It should be noted that the radio frequency front end module 110 in the first embodiment of the present invention has the same pin number and package structure as the radio frequency front end module 310 in the second embodiment, and the first amplifying module and the second The amplifying modules have the same number of pins and package structure, and the

RF transceiver modules

150 and 350 have the same model. Therefore, in the PCB layout of the communication terminal, a first pad group for soldering the RF front end module 110 or the RF front end module 310 may be preliminarily disposed on the PCB for soldering the first amplification module or a second pad group of the second amplification module, for soldering the third pad group of the radio frequency transceiver module 150 or the radio frequency transceiver module 350, and for soldering a plurality of the duplexers 170 or a plurality of the pairs a fourth pad group of the tool 370, and the first pad 191/391, the second pad 193/393, the third pad 195/395, and the fourth pad 197/ are pre-set on the PCB 397. Then, conductive lines are formed between the respective pad groups in accordance with the electrical connection relationship between the respective modules in FIGS. 1 to 3, thereby completing the PCB layout. Finally, according to the different radio communication modes of the communication terminal products produced, by affixing different devices on the PCB, the common board design of the communication terminal products of different radio frequency communication modes is realized, material cost is saved, and the PCB is sluggish. risk.

For example, when the radio frequency communication mode of the produced communication terminal is a mobile three-mode, the first amplification module SKY77824 is disposed on the second pad group by providing a radio frequency front end module SKY77910 on the first pad group. A radio frequency transceiver module WTR4905 is disposed on the third pad group, a plurality of duplexers are disposed on the fourth pad group, and a first device is disposed between the first pad 191 and the second pad 193. The first resistor R1 is described to turn on the first switching path. When the radio frequency communication mode of the produced communication terminal is a telecommunications three-mode, a second amplification module SKY77643 is disposed on the second pad group by providing a radio frequency front end module SKY77910 on the first pad group, a radio frequency transceiver module WTR4905 is disposed on the third pad group, a plurality of duplexers are disposed on the fourth pad group, and the first portion is disposed between the second pad 193 and the third pad 195 Two resistors R2 to conduct the second switching path. When the radio communication mode of the produced communication terminal is full Netcom, a radio frequency front end module SKY77912 is disposed on the first pad group, a second amplifying module SKY77643 is disposed on the second pad group, and a radio frequency transceiver module WTR4905 is disposed on the third pad group. A plurality of duplexers are disposed on the four pad groups, and the first resistor R1 is disposed between the first pad 191 and the second pad 193 to turn on the first switching path; The third resistor R3 is disposed between the third pad 395 and the fourth pad 397 to turn on the second switching path.

The radio frequency device connects the multiplexing switch port to the first duplexer through the switching circuit to form a first switching path; or the multiplexing switching port and the second duplex The devices are connected to form a second switching path; thereby implementing multiplexing of the radio frequency switching ports, which can effectively reduce the production cost of the communication terminal. In another aspect, the radio frequency device connects the first switching port with the first duplexer through the switching circuit to form a first switching path; and the second switching port and the second The duplexer is connected to form a second switching path, thereby realizing PCB common board design of communication terminals in different frequency ranges, which can reduce PCB debugging difficulty, save material cost, and help reduce PCB sluggish risk. Meanwhile, in the switching circuit, the first pad, the second pad, the third pad, and the fourth pad are arranged side by side or side by side, and the second pad and the third pad are multiplexed The disk is used for selective soldering of the first resistor, the second resistor and the third resistor, so that there is no excess microstrip line between the pads, so that the impedance of the switching circuit to the radio frequency device can be effectively reduced. The impact of the characteristics.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and those skilled in the art can understand all or part of the process of implementing the above embodiments, and according to the claims of the present invention. The equivalent change is still within the scope of the invention.

Claims

An RF device, comprising: a radio frequency front end module, a power amplification module, a radio frequency transceiver module, a plurality of duplexers, and a switching circuit;

The radio frequency front-end module includes a plurality of radio frequency switching ports, and each of the radio frequency switching ports is respectively connected to the power amplifying module and the radio frequency transceiver module through a duplexer;

A plurality of the radio frequency switching ports include a multiplexing switching port connected to the switching circuit; and the plurality of duplexers include a first duplexer and a second duplexer connected to the switching circuit;

The switching circuit is configured to connect the multiplexing switching port with the first duplexer to form a first switching path; or connect the multiplexing switching port with the second duplexer to form The second switching path.
The radio frequency device according to claim 1, wherein said switching circuit comprises first pad, second pad, third pad and fourth pad arranged side by side or side by side, said first pad Connected to the first duplexer, the second pad is connected to the first multiplexing switch port, the third pad is connected to the second duplexer, and the fourth pad is suspended Settings.
The radio frequency device according to claim 2, wherein the switching circuit further comprises a first resistor, and two ends of the first resistor are respectively connected to the first pad and the second pad, the complex And connecting to the first duplexer through the first resistor by using a switching port to form a first switching path.
The radio frequency device according to claim 2, wherein the switching circuit further comprises a second resistor, and two ends of the second resistor are respectively connected to the second pad and the third pad, the complex And connecting to the second duplexer through the second resistor by using a switching port to form a second switching path.
An RF device, comprising: a radio frequency front end module, a power amplification module, a radio frequency transceiver module, a plurality of duplexers, and a switching circuit;

The radio frequency front-end module includes a plurality of radio frequency switching ports, and each of the radio frequency switching ports is respectively connected to the power amplifying module and the radio frequency transceiver module through a duplexer;

A plurality of the radio frequency switching ports include a first switching port and a second switching port connected to the switching circuit; and the plurality of duplexers include a first duplexer and a second connected to the switching circuit Diplexer;

The switching circuit is configured to connect the first switching port with the first duplexer to form a first switching path; and connect the second switching port with the second duplexer to form The second switching path.
The radio frequency device according to claim 5, wherein said switching circuit comprises first pad, second pad, third pad and fourth pad arranged side by side or side by side, said first pad Connected to the first duplexer, the second pad is connected to the first switching port, the third pad is connected to the second duplexer, the fourth pad is The second switch port is connected.
The radio frequency device according to claim 6, wherein the switching circuit further includes a first resistor, and two ends of the first resistor are respectively connected to the first pad and the second pad, A switching port is coupled to the first duplexer through the first resistor to form a first switching path.
The radio frequency device according to claim 7, wherein the switching circuit further comprises a third resistor, and two ends of the third resistor are respectively connected to the third pad and the fourth pad, wherein the The second switching port is connected to the second duplexer through the third resistor to form a second switching path.
A communication terminal, characterized in that the communication terminal comprises the radio frequency device according to any one of claims 1-8.
The communication terminal according to claim 9, wherein the first switching path is used to turn on a radio frequency signal in a first frequency band, and the first frequency band is a B34 frequency band in a TDS system, or a TDD-LTE system The B39 band or the B40 band; the second switching path is used to turn on the radio frequency signal in the second frequency band, and the second frequency band is the BC0 band in the CDMA system or the B1 band in the FDD-LTE system.