WO2020243909A1 - Appareil de détection d'onde stationnaire et dispositif de communication - Google Patents

Appareil de détection d'onde stationnaire et dispositif de communication Download PDF

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Publication number
WO2020243909A1
WO2020243909A1 PCT/CN2019/090009 CN2019090009W WO2020243909A1 WO 2020243909 A1 WO2020243909 A1 WO 2020243909A1 CN 2019090009 W CN2019090009 W CN 2019090009W WO 2020243909 A1 WO2020243909 A1 WO 2020243909A1
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WIPO (PCT)
Prior art keywords
power
standing wave
voltage
signal
transmitter
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PCT/CN2019/090009
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English (en)
Chinese (zh)
Inventor
许锐生
王清华
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海能达通信股份有限公司
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Priority to PCT/CN2019/090009 priority Critical patent/WO2020243909A1/fr
Publication of WO2020243909A1 publication Critical patent/WO2020243909A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/04—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant in circuits having distributed constants, e.g. having very long conductors or involving high frequencies
    • G01R27/06—Measuring reflection coefficients; Measuring standing-wave ratio
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing

Definitions

  • This application relates to the field of communication technology, and in particular to a standing wave detection device and communication equipment.
  • the voltage standing wave ratio is usually reserved between the final power amplifier tube and the antenna port.
  • VSWR Voltage Standing Wave Ratio
  • the detection circuit monitors the standing wave in real time. When the standing wave is too large and the reflected signal exceeds the standard, the power amplifier is reduced or the power amplifier is turned off for protection; therefore, the standing wave detection and protection mechanism protects the power amplifier
  • the service life of the tube plays a vital role.
  • standing wave detection can be performed on the feedback link of high-power communication equipment predistortion, but this method is only suitable for digital predistortion (DPD, Digital Pre-Distortion) calibration system, and single-carrier digital trunking communication (DMR, Digital Mobile Radio) products do not need to perform DPD calibration, so there is no additional feedback channel; in addition, the current DMR vehicle standing wave detection method uses three operational amplifiers Realize the forward power and reverse power and standing wave detection of transmission with two detector tubes.
  • the disadvantage is that there are more components, large layout space and high cost. Due to the use of hardware loop detection and control, the accuracy of the components affects each other and is consistent. The performance is relatively poor, and it is necessary to repeatedly test each frequency point to evaluate the fitting calibration factor; due to the frequency band and printed circuit board (PCB, Printed Circuit Board) design differences, each model requires a large amount of debugging work.
  • PCB printed circuit board
  • the main problem to be solved by this application is to provide a standing wave detection device and communication equipment, which can use the receiver link to perform forward power and reverse power detection in the transmission time slot, and then perform standing wave detection to improve detection accuracy. Save hardware costs.
  • the technical solution adopted in this application is to provide a standing wave detection device.
  • the standing wave detection device includes a signal strength detection circuit and a controller.
  • the signal strength detection circuit is used for receiving by the receiver in the transmission time slot.
  • the link obtains the forward power and reverse power of the transmitter to generate the corresponding forward voltage and reverse voltage;
  • the controller is connected to the signal strength detection circuit to receive the forward voltage and reverse voltage to obtain the antenna Voltage standing wave ratio, and judge whether to adjust the transmitting power of the transmitter according to the voltage standing wave ratio of the antenna. If so, adjust the control voltage value input to the transmitter to adjust the transmitting power of the transmitter.
  • a communication device which includes: a first switch, a standing wave detection device, and a second switch.
  • the first switch is connected to the transmitter, the receiver, and Antenna connection, used to connect the transmitter and antenna in the transmission time slot or the receiver and antenna in the receiving time slot;
  • the standing wave detection device is connected to the receiver and the transmitter respectively, used to use the receiver in the transmission time slot
  • the receiving link obtains the voltage standing wave ratio of the antenna, and adjusts the transmitting power of the transmitter according to the voltage standing wave ratio;
  • the second switch is respectively connected with the transmitter, the receiver and the standing wave detection device to connect the transmitter and the standing wave Detection device;
  • the standing wave detection device includes a signal strength detection circuit and a controller, the signal strength detection circuit is used to obtain the forward power and reverse power of the transmitter by using the receiving link of the receiver in the transmission time slot to generate the corresponding
  • the controller is connected with the signal strength detection circuit to receive the forward voltage and the reverse voltage to obtain the voltage
  • the beneficial effect of the present application is that the signal strength detection circuit of the transmission time slot uses the receiving link of the receiver to obtain the forward voltage and the reverse voltage corresponding to the output signal of the transmitter; Calculate the voltage standing wave ratio of the antenna and determine whether it is necessary to adjust the transmitting power of the transmitter according to the voltage standing wave ratio. If it is necessary to adjust the transmitting power of the transmitter, adjust the control input to the transmitter The voltage value is adjusted to change the transmission power of the transmitter.
  • the forward power and reverse power detection are performed by using the receiver's receiving link in the transmission time slot, and then the standing wave detection is performed to improve the detection accuracy of the voltage standing wave ratio. , As the receiving link is multiplexed, the hardware cost is saved.
  • FIG. 1 is a schematic structural diagram of an embodiment of a standing wave detection device provided by the present application.
  • Figure 2 is a schematic structural diagram of an embodiment of a communication device provided by the present application.
  • Fig. 3 is a schematic structural diagram of another embodiment of a communication device provided by the present application.
  • FIG. 1 is a schematic structural diagram of an embodiment of a standing wave detection device provided by the present application.
  • the standing wave detection device includes a signal strength detection circuit 11 and a controller 12.
  • the signal strength detection circuit 11 is used to obtain the forward power and reverse power of the transmitter (not shown in the figure) by using the receiving link of the receiver (not shown in the figure) in the transmission time slot to generate the corresponding forward power. Voltage and reverse voltage.
  • the signal strength detection circuit 11 works in the transmission time slot of the transmitter. In the transmission time slot, the transmitter sends out radio frequency signals through an antenna (not shown in the figure). The receiver does not receive radio frequency signals. The signal strength detection circuit 11 can use the receiving The receiver link of the machine to obtain the power of the signal sent by the transmitter, and convert the power into a voltage value.
  • the controller 12 is connected to the signal strength detection circuit 11 for receiving forward voltage and reverse voltage to obtain the voltage standing wave ratio of the antenna, and judging whether to adjust the transmitting power of the transmitter according to the voltage standing wave ratio of the antenna, if necessary To adjust the transmitting power of the transmitter, adjust the control voltage value input to the transmitter to adjust the transmitting power of the transmitter.
  • the working principle of the voltage standing wave ratio detection is to obtain the forward power and reverse power first, and then calculate the voltage standing wave ratio VSWR according to the following formula:
  • ⁇ is the reflection coefficient
  • ⁇ is proportional to the ratio of the reverse voltage to the forward voltage
  • the controller 12 can obtain the voltage standing wave ratio of the antenna by calculation, and judge whether it is necessary to adjust the transmitting power of the transmitter according to the voltage standing wave ratio. Transmit power, the controller 12 can keep the output control voltage value unchanged. If the result of the judgment is that the transmitter’s transmit power needs to be adjusted, the controller 12 can adjust the transmitter’s transmit power by adjusting the output control voltage value, so that The transmitting power of the transmitter is adjusted according to specific needs to adapt to the current transmitting environment.
  • the signal strength detection circuit 11 uses the receiving link of the receiver to obtain the forward voltage and the reverse voltage corresponding to the output signal of the transmitter; and receives the forward voltage and the reverse voltage through the controller 12, and calculates The voltage standing wave ratio of the antenna is used to determine whether it is necessary to adjust the transmitting power of the transmitter. If the transmitting power of the transmitter needs to be adjusted, it is adjusted by adjusting the control voltage value input to the transmitter, so that the When the transmission power changes, the forward power and reverse power detection are performed by using the receiver's receiving link in the transmission time slot, and then the standing wave detection is performed to improve the detection accuracy of the voltage standing wave ratio. Due to the multiplexing of the receiving link, Save hardware costs.
  • the controller 12 includes a voltage standing wave ratio calculation and judgment circuit 121, a power adjustment circuit 122 and a power monitoring circuit 123.
  • the voltage standing wave ratio calculation and judgment circuit 121 is connected to the signal strength detection circuit 11, and is used to receive the forward voltage and the reverse voltage, calculate the voltage standing wave ratio, and judge whether the voltage standing wave ratio is greater than the preset voltage standing wave ratio, If the calculated voltage standing wave ratio is greater than the preset voltage standing wave ratio, a power adjustment command is sent to the power adjustment circuit 122.
  • the power adjustment circuit 122 is connected to the input end of the power amplifier of the transmitter, and is used to adjust the control voltage value of the input power amplifier to a preset voltage value after receiving an instruction to adjust the power, wherein the control voltage value is greater than the preset voltage value.
  • the power adjustment circuit 122 When the power adjustment circuit 122 receives the instruction to adjust the power, it indicates that the current voltage standing wave ratio obtained by the voltage standing wave ratio calculation and judgment circuit 121 is greater than the preset voltage standing wave ratio, and the current reflected power is large, which is not conducive to the radio frequency signal. Transmit, can reduce the transmitting power of the radio frequency signal, in order to reduce the reflected power, reduce the voltage standing wave ratio.
  • the power amplifier of the transmitter includes at least one transistor, and the output end of the power adjustment circuit 122 is connected to the input end of the transistor for outputting a control voltage value to control the output power of the transistor; in a specific embodiment, the transistor is The field effect tube connects the output terminal of the power adjustment circuit 122 with the gate of the field effect tube to control the gate voltage of the field effect tube, so as to adjust the output power of the power amplifier by adjusting the control voltage value.
  • the power monitoring circuit 123 is respectively connected to the signal strength detection circuit 11 and the power adjustment circuit 122, and is used to obtain the forward voltage output by the signal strength detection circuit 11 to generate forward power, and determine whether the forward power is greater than the preset power. If the forward power is greater than the preset power, a power adjustment instruction is sent to the power adjustment circuit 122.
  • the power monitoring circuit 123 is used to determine whether the acquired forward power exceeds the preset power. When the acquired forward power is greater than the preset power, the power monitoring circuit 123 sends an instruction to adjust the power to the power adjustment circuit 122 so that the power adjustment circuit 122 adjusts the control voltage value of the power amplifier input to the transmitter to change the transmit power of the transmitter.
  • the voltage standing wave ratio calculation and judgment circuit 121, the power adjustment circuit 122, and the power monitoring circuit 123 are used to detect whether the transmitter's transmitting power and the current voltage standing wave ratio are within the normal range. If it exceeds the normal range, the power adjustment circuit 122 To control the output power of the power amplifier of the transmitter, thereby controlling the transmitting power of the transmitter, reducing the reflected power of the radio frequency signal, and increasing the safety of the transmitter, so as not to damage the circuit due to excessive power.
  • FIG. 2 is a schematic structural diagram of an embodiment of a communication device provided by the present application.
  • the communication device includes: an antenna 21, a transmitter 22, a receiver 23, a first switch 24, a standing wave detection device 25, and a second switch 26.
  • the antenna 21 is used to transmit or receive radio frequency signals.
  • the transmitter 22 is connected to the antenna 21 for generating radio frequency signals, and the antenna 21 is used to transmit the radio frequency signals.
  • the receiver 23 is connected to the antenna 21 for receiving radio frequency signals and processing the radio frequency signals to obtain baseband signals;
  • the first switch 24 is connected to the antenna 21, the transmitter 22, and the receiver 23, respectively, and is used to connect the transmitter 22 and the antenna 21 in the transmission time slot or the receiver 23 and the antenna 21 in the reception time slot.
  • the transmitter 22 and the receiver 23 in order to use the receiving link 231 of the receiver 23 to obtain the forward power and the reverse power in the transmission time slot, the transmitter 22 and the receiver 23 share the same antenna 21, and the transmitter 22 and the receiver 23 cannot be simultaneously
  • the first switch 24 when the transmitter 22 and the receiver 23 are respectively connected to an antenna 21, the first switch 24 can be connected to the receiver 23 only, and the first switch 24 can be controlled to be off during the transmission time slot. The on state prevents the receiver 23 from receiving radio frequency signals in the transmission time slot.
  • the standing wave detection device 25 is connected to the transmitter 22 and the receiver 23 respectively, and is used to obtain the voltage standing wave ratio of the antenna 21 by using the receiving link 231 of the receiver 23 in the transmission time slot, and adjust the transmitter 22 according to the voltage standing wave ratio.
  • the transmit power is connected to the transmitter 22 and the receiver 23 respectively, and is used to obtain the voltage standing wave ratio of the antenna 21 by using the receiving link 231 of the receiver 23 in the transmission time slot, and adjust the transmitter 22 according to the voltage standing wave ratio.
  • the transmit power is connected to the transmitter 22 and the receiver 23 respectively, and is used to obtain the voltage standing wave ratio of the antenna 21 by using the receiving link 231 of the receiver 23 in the transmission time slot, and adjust the transmitter 22 according to the voltage standing wave ratio.
  • the transmit power is connected to the transmitter 22 and the receiver 23 respectively, and is used to obtain the voltage standing wave ratio of the antenna 21 by using the receiving link 231 of the receiver 23 in the transmission time slot, and adjust the transmitter 22 according to the voltage standing wave ratio.
  • the transmit power is connected to the
  • the second switch 26 is respectively connected to the transmitter 22, the receiver 23 and the standing wave detection device 25, and is used to connect the transmitter 22 and the standing wave detection device 25, so that the standing wave detection device 25 can receive from the transmission through the receiving link 231.
  • Receiver 23 does not receive radio frequency signals at this time.
  • the standing wave detection device 25 includes a signal strength detection circuit 251 and a controller 252.
  • the signal strength detection circuit 251 is connected to the receiving link 231.
  • the signal strength detection circuit 251 is used to obtain the transmission by using the receiving link 231 of the receiver 23 in the transmission time slot.
  • the forward power and reverse power of the machine 22 to generate corresponding forward voltage and reverse voltage;
  • the controller 252 is connected to the signal strength detection circuit 251 for receiving the forward voltage and reverse voltage to obtain the antenna 21 Voltage standing wave ratio, and judge whether to adjust the transmitting power of the transmitter 22 according to the voltage standing wave ratio of the antenna 21. If the transmitting power of the transmitter 22 needs to be adjusted, adjust the control voltage value input to the transmitter 22 to adjust the transmitter 22 The transmit power.
  • the transmitter 22 and the antenna 21 are connected through the first switch 24, and the signal strength detection circuit 251 in the transmission time slot of the transmitter 22 obtains the forward voltage and reverse voltage corresponding to the output signal of the transmitter 22 through the receiving link 231; the controller 252
  • the voltage standing wave ratio of the antenna 21 is calculated according to the forward voltage and the reverse voltage.
  • the control voltage value input to the transmitter 22 is adjusted to adjust the transmission
  • the transmission power of the transmitter 22 changes the transmission power of the transmitter 22.
  • the receiving link 231 of the receiver 23 is used to detect the forward power and the reverse power in the transmission time slot, and then the standing wave detection is performed to improve the detection accuracy and save The hardware cost.
  • Figure 3 is a schematic structural diagram of another embodiment of a communication device provided by the present application.
  • the communication device includes: an antenna 31, a transmitter 32, a receiver 33, a first switch 34, a standing wave detection device 35, and a second ⁇ 36 ⁇ Switch 36.
  • the first switch 34 is a one-of-two switch.
  • the first end of the first switch 34 is connected to the antenna 31, the second end is connected to the output end of the transmitter 32, and the third end is connected to the input end of the receiver 33;
  • the antenna 31 is used to transmit the radio frequency signal generated by the transmitter 32, and when the first terminal is connected to the third terminal, the antenna 31 is used to receive the radio frequency signal.
  • the transmitter 32 includes a signal generation and modulation circuit 321, a power amplifier 322, and a bidirectional coupler 323 connected in sequence.
  • the signal generation and modulation circuit 321 is used to generate a baseband signal, modulate the baseband signal into a radio frequency signal, modulate the carrier signal with the baseband signal to form a passband signal, and move the passband signal to the required frequency band to form a radio frequency signal and use Enough power is emitted.
  • the power amplifier 322 is used to amplify the received radio frequency signal
  • the bidirectional coupler 323 is used to couple the input amplified radio frequency signal, couple out a part of the radio frequency signal to generate a forward radio frequency signal and a reverse radio frequency signal, and The forward radio frequency signal and the reverse radio frequency signal are transmitted to the receiving link 331.
  • the transmitter 32 further includes a first signal attenuator 324 and a second signal attenuator 325.
  • the input end of the bidirectional coupler 323 is connected to the output end of the power amplifier 322, and the through end of the bidirectional coupler 323 is connected to the first switch 34.
  • the first coupling end of the bidirectional coupler 323 is connected to the first signal attenuator 324, the first coupling end of the bidirectional coupler 323 is the same direction coupling end, and the second coupling end of the bidirectional coupler 323 is connected to the first signal attenuator 324.
  • the two signal attenuators 325 are connected.
  • the second coupling end of the bidirectional coupler 323 is a reverse coupling end.
  • the bidirectional coupler 323 is used to send the forward radio frequency signal and the reverse radio frequency signal to the first signal attenuator 324 and the second signal attenuator 324, respectively.
  • the signal attenuator 325, the first signal attenuator 324 and the second signal attenuator 325 are respectively used to attenuate the forward radio frequency signal and the reverse radio frequency signal output by the bidirectional coupler 323.
  • the receiver 33 includes a receiving link 331 and a low noise amplifier 332.
  • the receiving link 331 includes at least a demodulation circuit (not shown in the figure).
  • the input end of the low noise amplifier 332 is connected to the third end of the first switch 34.
  • the output end of the noise amplifier 332 is connected to the second end of the second switch 36.
  • the low noise amplifier 332 is used to amplify the received radio frequency signal.
  • the second switch 36 is a radio frequency switch out of three.
  • the three terminals and the fourth terminal are respectively connected to the first signal attenuator 324 and the second signal attenuator 325, the first terminal of the second switch 36 is connected to a demodulation circuit, and the demodulation circuit is used to demodulate the acquired signal, To get the demodulated signal.
  • the demodulation circuit is used to demodulate the amplified radio frequency signal output by the low noise amplifier 332 to obtain a baseband signal, where ,
  • the signal strength detection circuit 351 is in the off state; when the first end of the second switch 36 is connected to the third end of the second switch 36, the demodulation circuit is used to demodulate the signal output by the first signal attenuator 324, In order to obtain the forward signal, the signal strength detection circuit 351 outputs the forward voltage according to the forward signal; when the first terminal of the second switch 36 is connected to the fourth terminal of the second switch 36, the demodulation circuit is used for the second signal
  • the signal output by the attenuator 325 is demodulated to obtain a reverse signal, and the signal strength detection circuit 351 outputs a reverse voltage according to the reverse signal.
  • the controller 352 includes a voltage standing wave ratio calculation and judgment circuit 3521, a power adjustment circuit 3522, and a power monitoring circuit 3523.
  • the voltage standing wave ratio calculation and judgment circuit 3521 is connected to the signal strength detection circuit 351 for receiving forward and reverse voltages. Voltage, and calculate the voltage standing wave ratio, determine whether the voltage standing wave ratio is greater than the preset voltage standing wave ratio, if the voltage standing wave ratio is greater than the preset voltage standing wave ratio, send the power adjustment command to the power adjustment circuit 3522, and A warning can be issued to remind the user that the current voltage standing wave ratio is too large.
  • the voltage standing wave ratio calculation and judgment circuit 3521 can be connected to a speaker (not shown in the figure).
  • the output voltage is The loudspeaker causes the loudspeaker to emit a warning sound;
  • the power adjustment circuit 3522 is connected to the input end of the power amplifier 322 of the transmitter 32, and is used to adjust the control voltage value of the input power amplifier 322 to a preset voltage after receiving a power adjustment instruction Value, where the control voltage value is greater than the preset voltage value.
  • the power monitoring circuit 3523 is respectively connected to the signal strength detection circuit 351 and the power adjustment circuit 3522, and is used to obtain the forward voltage output by the signal strength detection circuit 351 to generate forward power, and determine whether the forward power is greater than the preset power, If the forward power is greater than the preset power, an instruction to adjust the power is sent to the power adjustment circuit 3522.
  • the signal generation and modulation circuit 321 In the transmission time slot, the first end and the second end of the first switch 34 are connected, the signal generation and modulation circuit 321 generates a radio frequency signal, the power amplifier 322 amplifies the radio frequency signal, and the bidirectional coupler 323 performs the amplified radio frequency signal. Coupled, part of the radio frequency signal is output from the through end of the bidirectional coupler 323, part of the radio frequency signal (forward radio frequency signal) is output from the first coupling end, and another part of the radio frequency signal (reverse radio frequency signal) is output from the second coupling end.
  • the signal attenuator 324 attenuates the forward radio frequency signal to obtain a forward radio frequency signal with reduced power, and the second signal attenuator 325 attenuates the reverse radio frequency signal to obtain a reverse radio frequency signal with reduced power.
  • the first terminal of the second switch 36 is connected to the third terminal or the fourth terminal.
  • it can be configured such that the first terminal of the second switch 36 is connected to the third terminal first, and then to the fourth terminal.
  • Terminal connection that is, first receive the signal output by the first signal attenuator 324, and then receive the signal output by the second signal attenuator 325, the demodulation circuit demodulates the received signal to obtain the forward signal and the reverse signal.
  • the signal strength detection circuit 351 After the signal strength detection circuit 351 obtains the forward signal and the reverse signal, it detects the forward power and reverse power corresponding to the forward signal and the reverse signal, and outputs the forward voltage and reverse voltage to the controller 352.
  • the controller 352 352 adjusts the control voltage value input to the power amplifier 322 as required.
  • the first end of the first switch 34 is connected to the third end, the antenna 31 receives the radio frequency signal, the radio frequency signal enters the low noise amplifier 332, and the low noise amplifier 332 amplifies the radio frequency signal, and the amplified signal
  • the radio frequency signal is transmitted to the demodulation circuit for processing to obtain the baseband signal.
  • the standing wave detection device 35 is in the off state, which does not affect the reception of the radio frequency signal.
  • the receiver 33 Since the receiver 33 is connected to the second switch 36 after the low noise amplifier 332, it is necessary to evaluate whether the performance index of the receiver 33 has changed after the introduction of the second switch 36, and test whether there is no second switch 36 or the second switch 36 is provided.
  • the sensitivity and intermodulation interference index in a specific embodiment, the frequencies L, M and H are respectively 400.075MHz, 435.075MHz and 469.075MHz, and the test data shown in the following table is obtained:
  • the difference loss caused by the second switch 36 is less than 0.7dB, and the second switch 36 is located after the low noise amplifier 332.
  • the deterioration of the receiving link 331 is negligible, and the sensitivity and intermodulation interference are basically negligible. There is no effect, so the second switch 36 can be added.
  • the transmit signal occupies one time slot, and the received signal occupies one time slot.
  • the receive link 331 after the low noise amplifier 332 can be reused for forward power.
  • reverse power detection for standing wave detection, protection and alarm measures.
  • a radio frequency switch that selects one of three is added to switch between receiving radio frequency signals, forward signals, and reverse signals, using signal strength detection
  • the circuit 351 obtains the forward power and the reverse power, and then sends them to the controller 352.
  • the controller 352 calculates the voltage standing wave ratio.
  • the controller 352 can reduce the power amplifier 322 Therefore, the output power of the power amplifier 322 is reduced, and the power amplifier 322 is protected in real time.
  • the voltage standing wave ratio is too large, an alarm will prompt the user that the voltage standing wave ratio of the antenna 31 is abnormal.
  • a test is performed on the DMR vehicle platform, the low noise amplifier 332 is disconnected from the receiving link 331, and the second switch 36 is connected to introduce the forward RF signal and the reverse RF signal to the second switch At the first end of 36, the signal strength detection circuit 351 is used to detect the forward power and reverse power of the transmitter 32 to obtain the voltage standing wave ratio as shown in the following table:
  • This embodiment has advantages in cost control, layout space, and detection accuracy, saving hardware cost, PCB layout space, and debugging workload, and can accurately detect the current VSWR of antenna 31, and reduce power or shut down
  • the protection measures of the power amplifier 322 reduce the damage to the power amplifier 322 caused by the transmitted signal.

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  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
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Abstract

L'invention concerne un appareil de détection d'onde stationnaire et un dispositif de communication. L'appareil de détection d'onde stationnaire comprend un circuit de détection d'intensité de signal (11) et un dispositif de commande (12). Le circuit de détection d'intensité de signal (11) est utilisé pour utiliser une liaison de réception d'un récepteur afin d'obtenir une puissance directe et une puissance inverse d'un émetteur dans un intervalle de temps de transmission de façon à générer une tension directe correspondante et une tension inverse correspondante. Le dispositif de commande (12) est connecté au circuit de détection d'intensité de signal (11) et est utilisé pour recevoir la tension directe et la tension inverse de façon à obtenir un rapport d'onde stationnaire de tension d'une antenne, déterminer, en fonction du rapport d'ondes stationnaires de tension de l'antenne, s'il convient de régler une puissance d'émission de l'émetteur, et si tel est le cas, régler la puissance d'émission de l'émetteur par le réglage de la valeur d'une tension de commande appliquée à l'émetteur. L'approche de la présente invention permet d'effectuer une détection de puissance directe et de puissance inverse dans l'intervalle de temps de transmission à l'aide de la liaison de réception du récepteur, et ainsi de réaliser une détection d'onde stationnaire afin d'améliorer la précision de détection et de réduire les coûts matériels.
PCT/CN2019/090009 2019-06-04 2019-06-04 Appareil de détection d'onde stationnaire et dispositif de communication WO2020243909A1 (fr)

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WO2022257775A1 (fr) * 2021-06-08 2022-12-15 中兴通讯股份有限公司 Procédé et appareil de détection d'ondes stationnaires

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