WO2020048277A1 - Circuit radiofréquence et dispositif de communication - Google Patents

Circuit radiofréquence et dispositif de communication Download PDF

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Publication number
WO2020048277A1
WO2020048277A1 PCT/CN2019/099321 CN2019099321W WO2020048277A1 WO 2020048277 A1 WO2020048277 A1 WO 2020048277A1 CN 2019099321 W CN2019099321 W CN 2019099321W WO 2020048277 A1 WO2020048277 A1 WO 2020048277A1
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WIPO (PCT)
Prior art keywords
carrier signal
frequency carrier
signal
unit
power
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PCT/CN2019/099321
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English (en)
Chinese (zh)
Inventor
程守刚
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中兴通讯股份有限公司
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Publication of WO2020048277A1 publication Critical patent/WO2020048277A1/fr

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/189—High-frequency amplifiers, e.g. radio frequency amplifiers
    • H03F3/19—High-frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
    • H03F3/245—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages with semiconductor devices only
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3036—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers
    • H03G3/3042—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers in modulators, frequency-changers, transmitters or power amplifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
    • H04B1/0053—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/401—Circuits for selecting or indicating operating mode
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/451—Indexing scheme relating to amplifiers the amplifier being a radio frequency amplifier
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B2001/0408—Circuits with power amplifiers
    • H04B2001/0416—Circuits with power amplifiers having gain or transmission power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B2001/0408—Circuits with power amplifiers
    • H04B2001/0425—Circuits with power amplifiers with linearisation using predistortion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B2001/0408—Circuits with power amplifiers
    • H04B2001/0433—Circuits with power amplifiers with linearisation using feedback

Definitions

  • This application relates to the field of communication technologies, and in particular, to a radio frequency circuit and a communication device.
  • 5G 5th-Generation, fifth-generation mobile communication technology
  • NR New Radio
  • LTE Long Term Evolution, Long Term Evolution
  • 3GPP 3rd Generation Partnership Project
  • 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.
  • 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
  • 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.
  • 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
  • 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 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 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.
  • 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.
  • FIG. 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.
  • 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.
  • 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.
  • 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 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.
  • 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.
  • 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.
  • 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 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.
  • 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 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.
  • 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 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.
  • 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.
  • 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.
  • 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 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.
  • 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 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 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 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.
  • 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.
  • 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 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.
  • 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.
  • 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 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.
  • 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 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 double Signal quality degradation due to carrier intermodulation.
  • 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.
  • 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.
  • the transmitting and receiving combining and isolating unit 91 is a circulator, a duplexer, or a radio frequency single-pole double-position switch.
  • 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.
  • 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.
  • 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.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Transmitters (AREA)

Abstract

L'invention concerne un circuit radiofréquence comprenant : une première unité d'amplification de gain réglable (10), une seconde unité d'amplification de gain réglable (20), un combineur (30), un amplificateur de puissance (40), un coupleur directionnel (50) et une antenne (60) ; la première unité d'amplification de gain réglable (10) est utilisée pour amplifier un premier signal de porteuse de fréquence d'émission d'entrée et transmettre le premier signal de porteuse de fréquence d'émission amplifié au combineur (30) ; et le gain d'amplification du premier signal de porteuse de fréquence d'émission est commandé en fonction de la valeur de puissance du premier signal de porteuse de fréquence d'émission détecté transmis par le coupleur directionnel (50). L'invention concerne également un dispositif de communication. En mettant en œuvre la solution de l'invention, le dispositif de communication réalise le partage d'un circuit de communication radiofréquence et d'une antenne au moyen de circuits de communication avec divers protocoles de communication, simplifie efficacement le circuit de communication radiofréquence dans le dispositif de communication et réduit le coût du dispositif de communication.
PCT/CN2019/099321 2018-09-05 2019-08-05 Circuit radiofréquence et dispositif de communication WO2020048277A1 (fr)

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CN201811031540.0 2018-09-05

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CN114499575B (zh) * 2022-01-21 2024-03-05 维沃移动通信有限公司 射频功率放大器、模组、电子设备、信号处理方法及装置

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