WO2020048277A1

WO2020048277A1 - Radio frequency circuit and communication device

Info

Publication number: WO2020048277A1
Application number: PCT/CN2019/099321
Authority: WO
Inventors: 程守刚
Original assignee: 中兴通讯股份有限公司
Priority date: 2018-09-05
Filing date: 2019-08-05
Publication date: 2020-03-12
Also published as: CN110880942B; CN110880942A

Abstract

The present application provides a radio frequency circuit, comprising: a first adjustable gain amplification unit (10), a second adjustable gain amplification unit (20), a combiner (30), a power amplifier (40), a directional coupler (50) and an antenna (60); the first adjustable gain amplification unit (10) is used for amplifying an input first transmitting frequency carrier signal and transmitting the amplified first transmitting frequency carrier signal to the combiner (30); and the amplification gain of the first transmitting frequency carrier signal is controlled according to the power value of the detected first transmitting frequency carrier signal transmitted by the directional coupler (50). The present application further discloses a communication device. By implementing the described solution, the communication device realizes the sharing of one radio frequency communication circuit and one antenna by communication circuits with various communication protocols, effectively simplifies the radio frequency communication circuit in the communication device, and reduces the cost of the communication device.

Description

Radio frequency circuit and communication equipment

cross reference

This application refers to Chinese Patent Application No. 201811031540.0 entitled "A Radio Frequency Circuit and Communication Equipment" filed on September 5, 2018, which is incorporated by reference in its entirety.

Technical field

This application relates to the field of communication technologies, and in particular, to a radio frequency circuit and a communication device.

Background technique

With the rapid development of communication technology, 5G (5th-Generation, fifth-generation mobile communication technology) NR (New Radio) is a new generation of wireless communication technology evolved on the basis of LTE (Long Term Evolution, Long Term Evolution). According to the frequency band plan proposed by the 3GPP (3rd Generation Partnership Project), the 5G communication network plan uses two 6G and millimeter wave spectrum resources. In order for communication equipment to support both LTE communication networks and 5G communication networks, conventional The design needs to set LTE radio frequency communication circuit and 5G radio frequency communication circuit in the communication equipment separately, and needs to set up LTE communication antenna and 5G communication antenna respectively, which not only increases the number of communication circuits and communication antennas, but also increases the size of the communication equipment. At the same time, it also increases the cost of communication equipment.

Summary of the Invention

This application proposes a radio frequency circuit and a communication device, which are used to solve the problem of redundant circuits and antennas in a communication device by providing a communication circuit and an antenna in a communication device that support multiple communication protocols.

The technical solution adopted in the present application is to provide a radio frequency circuit, including: a first adjustable gain amplification unit, a second adjustable gain amplification unit, a combiner, a power amplifier, a directional coupler, and an antenna; the first adjustable A gain amplifying unit, configured to amplify the input first transmit frequency carrier signal and send the amplified first transmit frequency carrier signal to the combiner; and according to the detected first transmitted by the directional coupler, The power value of the transmitting frequency carrier signal controls the amplification gain of the first transmitting frequency carrier signal; the second adjustable gain amplifying unit is configured to amplify the input second transmitting frequency carrier signal, and Sending a second transmitting frequency carrier signal to the combiner; controlling the amplification gain of the second transmitting frequency carrier signal according to the detected power value of the second transmitting frequency carrier signal transmitted by the directional coupler; the A combiner for mixing the input carrier signal of the first transmission frequency and the carrier signal of the second transmission frequency, and transmitting the obtained mixed signal To the power amplifier; the power amplifier is used to amplify the input mixed signal to a set power and send the amplified mixed signal to the directional coupler; the directional coupler is used to input the The mixed signal is transmitted to the antenna, and the input mixed signal is coupled to the first adjustable gain amplification unit and the second adjustable gain amplification unit.

Optionally, the first adjustable gain amplifier unit includes: a first adjustable gain amplifier, a first power detection unit, and a first power control unit; and the directional coupler is specifically configured to couple the input mixed signal Transmitting to the first power detection unit; the first power detection unit is configured to detect a power value of a first transmission frequency carrier signal in the mixed signal, and to detect the detected first transmission frequency carrier signal And sending the power value to the first power control unit; the first power control unit is configured to generate a first control by comparing a power value of the first transmit frequency carrier signal with a first reference power value Signal; sending the first control signal to the first adjustable gain amplifier to control the gain of the first adjustable gain amplifier; the first adjustable gain amplifier is used for the first control Under the signal amplification gain control, the first transmission frequency carrier signal is amplified, and the amplified first transmission frequency carrier signal is sent to the combiner.

Optionally, the second adjustable gain amplification unit includes: a second adjustable gain amplifier, a second power detection unit, and a second power control unit; and the directional coupler is specifically configured to couple the input mixed signal Transmitting to the second power detection unit; the second power detection unit is configured to detect a power value of a second transmission frequency carrier signal in the mixed signal, and to detect the detected second transmission frequency carrier signal And sending the power value to the second power control unit; the second power control unit is configured to generate a second control by comparing the power value of the second transmit frequency carrier signal with a second reference power value Signal; sending the second control signal to the second adjustable gain amplifier to control the gain of the second adjustable gain amplifier; the second adjustable gain amplifier is used for the second control Under the signal amplification gain control, the second transmission frequency carrier signal is amplified, and the amplified second transmission frequency carrier signal is sent to the combiner.

The present application also provides a communication device, including the radio frequency circuit described above.

A radio frequency circuit and a communication device described in the present application realize that communication circuits of multiple communication protocols share a set of radio frequency communication circuits and an antenna, which effectively simplifies the radio frequency communication circuit in the communication device and reduces the cost of the communication device.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural diagram of a radio frequency circuit according to a first embodiment of the present application; FIG.

2 is a schematic structural diagram of a radio frequency circuit according to a second embodiment of the present application;

3 is a schematic structural diagram of a radio frequency circuit according to a third embodiment of the present application;

FIG. 4 is a schematic structural diagram of a radio frequency circuit according to a fourth embodiment of the present application.

Specific embodiment

In order to further explain the technical means and effects adopted by the present application to achieve the intended purpose, the present application is described in detail below with reference to the drawings and preferred embodiments.

The first embodiment of the present application is a radio frequency circuit, as shown in FIG. 1, including the following components: a first adjustable gain amplification unit 10, a second adjustable gain amplification unit 20, a combiner 30, a power amplifier 40, Directional coupler 50 and antenna 60.

The output terminal of the first adjustable gain amplifier unit 10 is connected to the first input terminal of the combiner 30; the output terminal of the second adjustable gain amplifier unit 20 is connected to the second input terminal of the combiner 30; The output of the coupler 30 is connected to the input of the power amplifier 40; the output of the power amplifier 40 is connected to the input of the directional coupler 50; the output of the directional coupler 50 is connected to the antenna 60; the coupling output of the directional coupler 50 Connected to the first adjustable gain amplification unit 10 and the second adjustable gain amplification unit 20, respectively.

The first adjustable gain amplifying unit 10 is configured to amplify the input first transmitting frequency carrier signal and send the amplified first transmitting frequency carrier signal to the combiner 30; and transmit according to the detected directional coupler 50 The power value of the first transmission frequency carrier signal is used to control the amplification gain of the first transmission frequency carrier signal.

The second adjustable gain amplifying unit 20 is configured to amplify the input second transmission frequency carrier signal, and send the amplified second transmission frequency carrier signal to the combiner 30; and transmit according to the detected directional coupler 50 The power value of the second transmission frequency carrier signal is used to control the amplification gain of the second transmission frequency carrier signal.

The combiner 30 is configured to mix the inputted first transmission frequency carrier signal and the second transmission frequency carrier signal, and send the obtained mixed signal to the power amplifier 40; wherein the mixed signal includes: the first transmission frequency carrier signal and A second transmit frequency carrier signal.

The power amplifier 40 is configured to amplify the input mixed signal to a set power, and send the amplified mixed signal to the directional coupler 50.

The directional coupler 50 is configured to transmit the input mixed signal to the antenna 60 and couple the input mixed signal to the first adjustable gain amplification unit 10 and the second adjustable gain amplification unit 20.

In this embodiment, the first frequency carrier signal is an LTE communication frequency carrier signal; the second frequency carrier signal is a sub-6G frequency carrier signal for 5G communication.

Amplifying two communication carrier signals of different frequencies through a radio frequency circuit, and transmitting two carrier signals of different frequencies through an antenna 60, which effectively simplifies the radio frequency communication circuit in the communication equipment and reduces the cost of the communication equipment .

The first adjustable gain amplifying unit 10 and the second adjustable gain amplifying unit 20 perform automatic gain control according to the power of the communication carrier signal transmitted by the antenna 60, which can effectively correct the effects of the interaction between two communication carrier signals of different frequencies. Gain error, and other errors in the link.

The radio frequency circuit described in the first embodiment of the present application realizes that the LTE communication circuit and the 5G communication circuit share a set of radio frequency communication circuit and an antenna, which effectively simplifies the radio frequency communication circuit in the communication device and reduces the cost of the communication device.

The second embodiment of the present application is a radio frequency circuit, as shown in FIG. 2, including the following components: a first adjustable gain amplification unit 10, a second adjustable gain amplification unit 20, a combiner 30, a power amplifier 40, Directional coupler 50, antenna 60 and band-pass filter 70;

The output terminal of the first adjustable gain amplifier unit 10 is connected to the first input terminal of the combiner 30; the output terminal of the second adjustable gain amplifier unit 20 is connected to the second input terminal of the combiner 30; The output of the amplifier 30 is connected to the input of the power amplifier 40; the output of the power amplifier 40 is connected to the input of the directional coupler 50; the band-pass filter 70 is connected to the output of the directional coupler 50 and the antenna 60; The coupling output ends of the coupler 50 are respectively connected to the first adjustable gain amplification unit 10 and the second adjustable gain amplification unit 20.

The band-pass filter 70 is used for filtering clutter signals other than the mixed signals transmitted to the antenna 60 by the directional coupler 50.

In this embodiment, the first adjustable gain amplifier unit 10 includes a first adjustable gain amplifier 11, a first power detection unit 12, and a first power control unit 13.

The directional coupler 50 is specifically configured to couple and transmit the input mixed signal to the first power detection unit 12.

The first power detection unit 12 is configured to detect a power value of a first transmission frequency carrier signal in the mixed signal, and send the detected power value of the first transmission frequency carrier signal to the first power control unit 13.

The first power control unit 13 is configured to generate a first control signal by comparing the power value of the first transmission frequency carrier signal with a first reference power value; and sending the first control signal to the first adjustable gain amplifier 11 To control the gain of the first adjustable gain amplifier 11.

The first adjustable gain amplifier 11 is configured to amplify the first transmission frequency carrier signal under the control of the amplification gain of the first control signal, and send the amplified first transmission frequency carrier signal to the combiner.

The second adjustable gain amplifier unit 20 includes a second adjustable gain amplifier 21, a second power detection unit 22, and a second power control unit 23.

The directional coupler 50 is specifically configured to couple and transmit the input mixed signal to the second power detection unit 22.

The second power detection unit 22 is configured to detect a power value of a second transmission frequency carrier signal in the mixed signal, and send the detected power value of the second transmission frequency carrier signal to the second power control unit 23.

The second power control unit 23 is configured to generate a second control signal by comparing the power value of the second transmit frequency carrier signal with a second reference power value; and sending the second control signal to the second adjustable gain amplifier 21 To control the gain of the second adjustable gain amplifier 21.

The second adjustable gain amplifier 21 is configured to amplify the second transmission frequency carrier signal under the control of the amplification gain of the second control signal, and send the amplified second transmission frequency carrier signal to the combiner.

In this embodiment, the first power detecting unit 12 may be specifically configured to: down-convert the first transmission frequency carrier signal through the first transmission frequency receiver, and detect the power of the first transmission frequency carrier signal after the down conversion Value; sending the detected power value of the first transmission frequency carrier signal after down conversion to the first power control unit 13.

The second power detecting unit 22 may be specifically configured to: downconvert the second transmission frequency carrier signal through the second transmission frequency receiver, and detect the power value of the second transmission frequency carrier signal after the downconversion; and The power value of the down-converted carrier signal of the second transmission frequency is sent to the second power control unit 23.

The radio frequency circuit described in the second embodiment of the present application realizes that the LTE communication circuit and the 5G communication circuit share a set of radio frequency communication circuit and an antenna, which effectively simplifies the radio frequency communication circuit in the communication device and reduces the cost of the communication device.

A third embodiment of the present application is a radio frequency circuit, as shown in FIG. 3, including the following components: a first adjustable gain amplification unit 10, a second adjustable gain amplification unit 20, a combiner 30, a power amplifier 40, The directional coupler 50, the antenna 60, and the band-pass filter 70.

In this implementation, the radio frequency circuit further includes a first distortion control unit 81 and / or a second distortion control unit 82.

The directional coupler 50 is further configured to couple and transmit the input mixed signal to the first distortion control unit 81 and / or the second distortion control unit 82.

The first distortion control unit 81 is configured to demodulate a first transmit frequency carrier signal in the input mixed signal to obtain first data information; perform distortion analysis on the first data information to amplify the input to the first adjustable gain The first transmission frequency carrier signal of the unit 10 performs predistortion processing.

A second distortion control unit 82, configured to demodulate a second transmit frequency carrier signal in the input mixed signal to obtain second data information; perform distortion analysis on the second data information to amplify the input to the second adjustable gain The second transmit frequency carrier signal of the unit 20 is subjected to predistortion processing.

Predistortion processing is performed on the first frequency carrier signal input to the first adjustable gain amplifying unit 11 through the first distortion control unit 81, and predistortion processing can be performed on the first frequency carrier signal according to the feedback distortion data to correct the channel and the dual frequency. Signal quality degradation due to carrier intermodulation.

Predistortion processing is performed on the second frequency carrier signal input to the second adjustable gain amplifying unit 21 through the first distortion control unit 82, and predistortion processing can be performed on the second frequency carrier signal according to the feedback distortion data to correct the channel and the dual frequency. Signal quality degradation due to carrier intermodulation.

The radio frequency circuit described in the third embodiment of the present application realizes that the LTE communication circuit and the 5G communication circuit share a set of radio frequency communication circuit and an antenna, which effectively simplifies the radio frequency communication circuit in the communication equipment and reduces the cost of the communication equipment.

A fourth embodiment of the present application is a radio frequency circuit, as shown in FIG. 4, including the following components: a first adjustable gain amplification unit 10, a second adjustable gain amplification unit 20, a combiner 30, a power amplifier 40, The directional coupler 50, the antenna 60, and the band-pass filter 70.

The second power detecting unit 22 is configured to detect the power value of the second transmission frequency carrier signal in the mixed signal, and send the detected power value of the second transmission frequency carrier signal to the second power control unit 23.

In this implementation, the radio frequency circuit further includes: a first distortion control unit 81 and / or a second distortion control unit 82;

Predistortion processing is performed on the second frequency carrier signal input to the second adjustable gain amplifying unit 21 through the first distortion control unit 82, and predistortion processing can be performed on the second frequency carrier signal according to the feedback distortion data to correct the channel and double Signal quality degradation due to carrier intermodulation.

In this implementation, the radio frequency circuit further includes a transmitting and receiving combining isolation unit 91, a receiving amplifier 92, a power divider 93, a first receiving unit 94, and a second receiving unit 95.

Among them, the transmitting input terminal of the transmitting and receiving combining isolation unit 91 is connected to the output terminal of the power amplifier 32; the band-pass filter 70 is respectively connected to the transmitting output / receiving input terminal of the transmitting and receiving combining isolation unit 91 and the antenna 60; transmitting and receiving The receiving output of the combined isolation unit 91 is connected to the input of the receiving amplifier 92; the output of the receiving amplifier 92 is connected to the input of the power divider 93; the two outputs of the power divider 93 are respectively connected to the first receiving unit 94 It is connected to the second receiving unit 95.

The directional coupler 50 is specifically configured to transmit the input mixed signal to the transmitting and receiving combining isolation unit 91.

The transmitting and receiving combining isolation unit 91 is configured to transmit the input mixed signal to the antenna 60; and transmit the received signal received by the antenna 60 to the receiving amplifier 92.

The receiving amplifier 92 is configured to amplify the received received signal and transmit the amplified received signal to the power divider 93.

The power divider 93 is configured to transmit the received reception signals to the first receiving unit 94 and the second receiving unit 95, respectively.

The first receiving unit 94 is configured to sequentially perform mixing and demodulation processing on a first transmission frequency carrier signal in the received received signal to obtain first communication data information.

The second receiving unit 95 is configured to sequentially perform frequency mixing and demodulation processing on a second transmission frequency carrier signal in the received received signal to obtain second communication data information.

Optionally, the transmitting and receiving combining and isolating unit 91 is a circulator, a duplexer, or a radio frequency single-pole double-position switch.

In the embodiment, the receiving amplifier 92 is a low-noise amplifier, and the noise figure of the receiving amplifier 92 is less than a set noise threshold. The receiving amplifier 92 can effectively reduce the noise figures of the first receiving unit 94 and the second receiving unit 95.

In the embodiment, the band-pass filter 70 is specifically configured to: filter out clutter signals other than the mixed signal transmitted to the antenna by the transmitting and receiving combining isolation unit; and filter the receiving signal transmitted by the antenna to the transmitting and receiving combining isolation unit Other than clutter signals.

The passband bandwidth of the band-pass filter 70 is less than a set bandwidth threshold; the band-pass filter 70 can effectively filter out clutter signals generated by intermodulation of the first frequency carrier signal and the second frequency carrier signal.

The radio frequency circuit described in the fourth embodiment of the present application realizes that the LTE communication circuit and the 5G communication circuit share a set of radio frequency communication circuit and an antenna, which effectively simplifies the radio frequency communication circuit in the communication equipment and reduces the cost of the communication equipment.

The fifth embodiment of the present application is a communication device including some or all of the components in any one of the first embodiment to the fourth embodiment of the present application.

In this embodiment, the communication device includes, but is not limited to, devices such as a user terminal and a communication base station.

The communication device described in the fifth embodiment of the present application realizes that the LTE communication circuit and the 5G communication circuit share a set of radio frequency communication circuits and an antenna, which effectively simplifies the radio frequency communication circuits in the communication equipment and reduces the cost of the communication equipment.

It should be noted that, in this article, the terms "including", "including" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, It also includes other elements not explicitly listed, or elements inherent to such a process, method, article, or device. Without more restrictions, an element limited by the sentence "including a ..." does not exclude that there are other identical elements in the process, method, article, or device that includes the element.

The above-mentioned serial numbers of the embodiments of the present application are merely for description, and do not represent the superiority or inferiority of the embodiments.

Through the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus the necessary universal hardware platform, and of course, also by hardware, but in many cases the former is better. The examples. Based on such an understanding, the technical solution of this application that is essentially or contributes to the existing technology can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, The CD-ROM) includes several instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in the embodiments of the present application.

The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the specific embodiments described above, and the specific embodiments described above are only schematic and not restrictive. Those of ordinary skill in the art at Under the enlightenment of this application, many forms can be made without departing from the scope of this application and the scope of protection of the claims, and these all fall into the protection of this application.

Claims

A radio frequency circuit includes: a first adjustable gain amplification unit, a second adjustable gain amplification unit, a combiner, a power amplifier, a directional coupler, and an antenna;

The first adjustable gain amplifying unit is configured to amplify the input first transmission frequency carrier signal and send the amplified first transmission frequency carrier signal to the combiner; according to the detected orientation The power value of the first transmission frequency carrier signal transmitted by the coupler controls the amplification gain of the first transmission frequency carrier signal;

The second adjustable gain amplifying unit is configured to amplify the input second transmission frequency carrier signal and send the amplified second transmission frequency carrier signal to the combiner; according to the detected orientation The power value of the second transmission frequency carrier signal transmitted by the coupler to control the amplification gain of the second transmission frequency carrier signal;

The combiner is configured to mix the inputted first transmission frequency carrier signal and the second transmission frequency carrier signal, and send the obtained mixed signal to the power amplifier;

The power amplifier is configured to amplify an input mixed signal to a set power, and send the amplified mixed signal to the directional coupler;

The directional coupler is configured to transmit the input mixed signal to the antenna, and to couple the input mixed signal to the first adjustable gain amplification unit and the second adjustable gain amplification unit.
The radio frequency circuit according to claim 1, wherein the first adjustable gain amplifier unit comprises: a first adjustable gain amplifier, a first power detection unit, and a first power control unit;

The directional coupler is specifically configured to couple and transmit the input mixed signal to the first power detection unit;

The first power detection unit is configured to detect a power value of a first transmission frequency carrier signal in the mixed signal, and send the detected power value of the first transmission frequency carrier signal to the first power. control unit;

The first power control unit is configured to generate a first control signal by comparing a power value of the first transmit frequency carrier signal with a first reference power value; and sending the first control signal to the A first adjustable gain amplifier to control a gain of the first adjustable gain amplifier;

The first adjustable gain amplifier is configured to amplify a first transmission frequency carrier signal under the control of the amplification gain of the first control signal, and send the amplified first transmission frequency carrier signal to the combination. Road device.
The radio frequency circuit according to claim 2, wherein the first power detection unit is specifically configured to:

Down-converting the first transmit frequency carrier signal through a first transmit frequency receiver, and detecting a power value of the first transmit frequency carrier signal after the down conversion;

Sending the detected power value of the first transmission frequency carrier signal after down conversion to the first power control unit.
The radio frequency circuit according to any one of claims 1 to 3, wherein the second adjustable gain amplifier unit comprises: a second adjustable gain amplifier, a second power detection unit, and a second power control unit;

The directional coupler is specifically configured to couple and transmit the input mixed signal to the second power detection unit;

The second power detecting unit is configured to detect a power value of a second transmission frequency carrier signal in the mixed signal, and send the detected power value of the second transmission frequency carrier signal to the second power. control unit;

The second power control unit is configured to generate a second control signal by comparing a power value of the second transmission frequency carrier signal with a second reference power value; and sending the second control signal to the A second adjustable gain amplifier to control a gain of the second adjustable gain amplifier;

The second adjustable gain amplifier is configured to amplify a second transmission frequency carrier signal under the control of the amplification gain of the second control signal, and send the amplified second transmission frequency carrier signal to the combination. Road device.
The radio frequency circuit according to claim 4, wherein the second power detection unit is specifically configured to:

Down-converting the second transmission frequency carrier signal through a second transmission frequency receiver, and detecting a power value of the second transmission frequency carrier signal after the down conversion;

And sending the detected power value of the second transmission frequency carrier signal after the down-conversion to the second power control unit.
The radio frequency circuit according to claim 1, wherein the radio frequency circuit further comprises: a first distortion control unit;

The directional coupler is further configured to couple and transmit the input mixed signal to the first distortion control unit;

The first distortion control unit is configured to demodulate a first transmit frequency carrier signal in an input mixed signal to obtain first data information; perform distortion analysis on the first data information to input the signal to the first A first transmit frequency carrier signal of an adjustable gain amplifying unit performs predistortion processing.
The radio frequency circuit according to claim 1 or 6, wherein the radio frequency circuit further comprises: a second distortion control unit;

The directional coupler is further configured to couple and transmit the input mixed signal to the second distortion control unit;

The second distortion control unit is configured to demodulate a second transmit frequency carrier signal in the input mixed signal to obtain second data information; perform distortion analysis on the second data information to input the signal to the first Pre-distortion processing is performed on the second transmit frequency carrier signal of the two adjustable gain amplification units.
The radio frequency circuit according to claim 1, wherein the radio frequency circuit further comprises: a transmitting and receiving combining isolation unit, a receiving amplifier, a power divider, a first receiving unit and a second receiving unit;

The directional coupler is specifically configured to transmit the input mixed signal to the transmitting and receiving combining isolation unit;

The transmitting and receiving combining isolation unit is configured to transmit the input mixed signal to the antenna; and transmit the received signal received by the antenna to the receiving amplifier;

The receiving amplifier is configured to amplify the received reception signal and transmit the amplified reception signal to the power divider;

The power divider is configured to transmit the received reception signals to the first receiving unit and the second receiving unit, respectively;

The first receiving unit is configured to sequentially perform mixing and demodulation processing on a first transmission frequency carrier signal in a received received signal to obtain first communication data information;

The second receiving unit is configured to sequentially perform frequency mixing and demodulation processing on a second transmission frequency carrier signal in the received received signal to obtain second communication data information.
The radio frequency circuit according to claim 8, wherein the transmitting and receiving combining and isolating unit is a circulator, a duplexer, or a radio frequency single-pole double-position switch.
The radio frequency circuit according to claim 8 or 9, wherein the transmitting circuit further comprises: a band-pass filter;

The band-pass filter is configured to filter clutter signals other than the mixed signals transmitted to the antenna by the transmitting and receiving combining isolation unit; and filter the signals transmitted by the antenna to the transmitting and receiving combining isolation unit. Clutter signals other than received signals.
A communication device, comprising: the radio frequency circuit according to any one of claims 1 to 10.