CN112737705A - Automatic electronic tuning device and automatic electronic tuning method for standing-wave ratio - Google Patents
Automatic electronic tuning device and automatic electronic tuning method for standing-wave ratio Download PDFInfo
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- CN112737705A CN112737705A CN202011592667.7A CN202011592667A CN112737705A CN 112737705 A CN112737705 A CN 112737705A CN 202011592667 A CN202011592667 A CN 202011592667A CN 112737705 A CN112737705 A CN 112737705A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/101—Monitoring; Testing of transmitters for measurement of specific parameters of the transmitter or components thereof
- H04B17/102—Power radiated at antenna
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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
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/101—Monitoring; Testing of transmitters for measurement of specific parameters of the transmitter or components thereof
- H04B17/103—Reflected power, e.g. return loss
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- 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
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- 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
- H04B2001/045—Circuits with power amplifiers with means for improving efficiency
Abstract
The present disclosure relates to a standing-wave ratio automatic electric adjusting device and an automatic electric adjusting method, wherein the standing-wave ratio automatic electric adjusting device comprises a standing-wave ratio detection circuit for detecting the standing-wave ratio of a radio frequency signal of a corresponding port of the standing-wave ratio automatic electric adjusting device; wherein, the port comprises an input port and/or an output port; the control circuit is connected with the standing-wave ratio detection circuit and is used for controlling the voltage control signal output by the control circuit to change continuously, acquiring a target standing-wave ratio according to the detected change condition of the standing-wave ratio and adjusting the output voltage control signal according to the target standing-wave ratio; and the standing-wave ratio electric adjusting circuit is connected with the control circuit and is used for automatically adjusting the standing-wave ratio of the radio frequency signal of the corresponding port of the standing-wave ratio automatic electric adjusting device to a target standing-wave ratio according to the voltage control signal. By the technical scheme, the standing-wave ratio of the communication system can be effectively detected and automatically debugged, so that the production efficiency of the communication equipment is improved, and the use reliability of the communication equipment is improved.
Description
Technical Field
The disclosure relates to the technical field of communication, in particular to a standing-wave ratio automatic electric tuning device and an automatic electric tuning method.
Background
The measurement of the standing-wave ratio is one of the important indexes in the equipment of the communication system, and the quality or performance of the transmission signal of the communication system can be known through the standing-wave ratio. The impedance of the radio frequency system needs to be matched, and especially, the voltage standing wave ratio needs to meet certain requirements, because the frequency range is wide when the radio frequency system is used in a broadband, the standing wave ratio can change along with the frequency, and the impedance needs to be matched as much as possible in a wide range.
Whether the port radio-frequency signals are effectively transmitted or not can be known through standing-wave ratio detection, and in the radio-frequency field, the smaller the port standing-wave ratio of a communication system is, the better the matching of the system ports is, and the radio-frequency signals are effectively transmitted. With the development of the communication industry, the importance of standing-wave ratio debugging in the design of a communication system is more and more prominent, higher and higher requirements are also provided for the indexes of standing-wave ratio measurement, and how to realize the detection and automatic adjustment of the standing-wave ratio becomes a problem to be solved urgently.
Disclosure of Invention
In order to solve the technical problems or at least partially solve the technical problems, the present disclosure provides an automatic electronic tuning device and an automatic electronic tuning method for a standing-wave ratio, which can effectively detect the standing-wave ratio of a communication system and automatically tune the standing-wave ratio, thereby improving the production efficiency of communication equipment and improving the reliability of communication equipment.
In a first aspect, the present disclosure provides an automatic electronic tuning device for standing-wave ratio, including:
the standing-wave ratio detection circuit is used for detecting the standing-wave ratio of the radio frequency signal of the corresponding port of the automatic standing-wave ratio electric adjusting device; wherein the port comprises an input port and/or an output port;
the control circuit is connected with the standing-wave ratio detection circuit and is used for controlling the voltage control signal output by the control circuit to change constantly, acquiring a target standing-wave ratio according to the detected change condition of the standing-wave ratio and adjusting the output voltage control signal according to the target standing-wave ratio;
and the standing-wave ratio electric adjusting circuit is connected with the control circuit and is used for automatically adjusting the standing-wave ratio of the radio frequency signal of the corresponding port of the standing-wave ratio automatic electric adjusting device to the target standing-wave ratio according to the voltage control signal.
Optionally, the standing-wave ratio power modulation circuit includes an electrical bridge, an input end of the electrical bridge is used for inputting a radio frequency signal, a straight-through end of the electrical bridge is connected to a first reflection terminal, a coupling end of the electrical bridge is connected to a second reflection terminal, and an output end of the electrical bridge is used for performing power synthesis on a reflection signal of the first reflection terminal and a reflection signal of the second reflection terminal and outputting the resultant;
the standing-wave ratio electric adjusting circuit is used for automatically adjusting equivalent capacitance values of the first reflection terminal and the second reflection terminal according to the voltage control signal so as to adjust the standing-wave ratio of the radio-frequency signal of the corresponding port of the standing-wave ratio electric adjusting device.
Optionally, the first and second reflective terminals each comprise a varactor.
Optionally, a through end of the bridge is connected to a cathode of the varactor in the first reflective terminal, and an anode of the varactor in the first reflective terminal is connected to a set power signal;
and the coupling end of the electric bridge is connected with the cathode of the variable capacitance diode in the second reflection terminal, and the anode of the variable capacitance diode in the second reflection terminal is connected with a set power supply signal.
Optionally, the standing-wave ratio detection circuit includes:
the power detection circuit is used for detecting the power of the radio frequency signal of the corresponding port of the standing-wave ratio automatic electric adjusting device;
and the reflected power detection circuit is used for detecting the reflected power of the radio frequency signal of the corresponding port of the standing-wave ratio automatic electric adjusting device.
Optionally, the power detection circuit and the reflected power detection circuit each include:
the attenuation network is used for attenuating the power of the input radio frequency signal to a set power;
the power detection chip is connected with the attenuation network and used for converting the radio-frequency signal after power attenuation into a power detection voltage signal;
and the amplifying circuit is connected with the power detection chip and is used for amplifying the power detection voltage signal by a set multiple and then outputting the amplified power detection voltage signal.
Optionally, a first coupler and a second coupler are sequentially connected in series between an input port of the standing-wave ratio automatic electric adjusting device and the corresponding standing-wave ratio electric adjusting circuit;
the power detection circuit corresponding to the input port is connected with the first coupler, and the reflected power detection circuit corresponding to the input port is connected with the second coupler; or, the power detection circuit corresponding to the input port is connected to the second coupler, and the reflected power detection circuit corresponding to the input port is connected to the first coupler;
a third coupler and a fourth coupler are sequentially connected in series between an output port of the standing-wave ratio automatic electric adjusting device and the corresponding standing-wave ratio electric adjusting circuit;
the power detection circuit corresponding to the output port is connected with the third coupler, and the reflected power detection circuit corresponding to the output port is connected with the fourth coupler; alternatively, the power detection circuit corresponding to the output port is connected to the fourth coupler, and the reflected power detection circuit corresponding to the output port is connected to the third coupler.
In a second aspect, the present disclosure further provides a method for automatically electrically adjusting a standing-wave ratio, which is performed by the apparatus for automatically electrically adjusting a standing-wave ratio according to the first aspect, and the method for automatically electrically adjusting a standing-wave ratio includes:
detecting the standing-wave ratio of a radio frequency signal of a corresponding port of the automatic electric adjusting device of the standing-wave ratio;
controlling the voltage control signal to change continuously;
and acquiring a target standing-wave ratio according to the detected change condition of the standing-wave ratio, and adjusting the standing-wave ratio of the radio frequency signal of the corresponding port of the automatic electric modulation device of the standing-wave ratio to the target standing-wave ratio.
Optionally, the controlling the voltage control signal to change continuously includes:
controlling the voltage control signal to increase gradually and then decrease gradually on the basis of setting an initial value; or controlling the voltage control signal to decrease and then increase on the basis of setting an initial value.
Optionally, the obtaining a target standing-wave ratio according to the detected change condition of the standing-wave ratio includes:
judging whether the detected standing-wave ratio is reduced or not in the process that the voltage control signal is continuously changed;
and when the detected standing-wave ratio is not changed any more, determining the standing-wave ratio at the moment as the target standing-wave ratio.
Compared with the prior art, the technical scheme provided by the disclosure has the following advantages:
the standing-wave ratio automatic electric adjusting device provided by the invention utilizes the standing-wave ratio detection circuit to detect the standing-wave ratio of the radio frequency signal of the corresponding port of the standing-wave ratio automatic electric adjusting device, utilizes the control circuit to control the voltage control signal output by the control circuit to change continuously, obtains the target standing-wave ratio according to the change condition of the detected standing-wave ratio in the process of the continuous change of the voltage control signal, utilizes the standing-wave ratio electric adjusting circuit to automatically adjust the standing-wave ratio of the radio frequency signal of the corresponding port of the standing-wave ratio automatic electric adjusting device to the target standing-wave ratio according to the voltage control signal, effectively improves the debugging pass rate of the standing-wave ratio, improves the automation degree of the debugging process of indexes of communication equipment, is suitable for various communication equipment needing to carry out standing-wave ratio debugging and detection, has wide application range, can effectively detect the standing-wave ratio of a communication system and carry out automatic debugging on the standing-wave ratio, therefore, the production efficiency of the communication equipment is improved, and the use reliability of the communication equipment is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of an automatic electronic tuning device with standing-wave ratio according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a standing-wave ratio electrical tuning circuit provided in the embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a power detection circuit according to an embodiment of the disclosure;
fig. 4 is a schematic flow chart of a method for automatically electrically tuning a standing-wave ratio according to an embodiment of the present disclosure;
fig. 5 is a schematic specific flow chart of a method for automatically electrically tuning a standing-wave ratio according to an embodiment of the present disclosure.
Detailed Description
In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that the embodiments and features of the embodiments of the present disclosure may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced in other ways than those described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.
Fig. 1 is a schematic structural diagram of an automatic electronic tuning device with a standing-wave ratio according to an embodiment of the present disclosure. As shown in fig. 1, the standing-wave ratio automatic electric tuning device includes a standing-wave ratio detection circuit 1, a control circuit 2 and a standing-wave ratio electric tuning circuit 3, wherein the control circuit 2 is connected to the standing-wave ratio detection circuit 1 and the standing-wave ratio electric tuning circuit 3 respectively.
The standing-wave ratio detection circuit 1 is used for detecting the standing-wave ratio of the radio frequency signal of the port corresponding to the automatic standing-wave ratio electric adjusting device, the control circuit 2 is used for controlling the voltage control signal output by the control circuit to change constantly, acquiring a target standing-wave ratio according to the detected change condition of the standing-wave ratio, and adjusting the output voltage control signal according to the target standing-wave ratio, and the standing-wave ratio electric adjusting circuit 3 is used for automatically adjusting the standing-wave ratio of the radio frequency signal of the port corresponding to the automatic standing-wave ratio electric adjusting device to the target standing-wave ratio according to the voltage control signal.
The port includes an input port RF _ in and/or an output port RF _ out, that is, a standing-wave ratio detection circuit 1 and a standing-wave ratio electrical tuning circuit 3 may be set corresponding to the input port RF _ in of the automatic electrical tuning device, a standing-wave ratio detection circuit 1 and a standing-wave ratio electrical tuning circuit 3 may be set corresponding to the output port RF _ out of the automatic electrical tuning device, a standing-wave ratio detection circuit 1 and a standing-wave ratio electrical tuning circuit 3 may be set corresponding to both the input port RF _ in and the output port RF _ out of the automatic electrical tuning device, fig. 1 exemplarily sets a standing-wave ratio detection circuit 1 and a standing-wave ratio electrical tuning circuit 3 corresponding to both the input port RF _ in and the output port RF _ out of the automatic electrical tuning device, a control circuit 2 is connected to the standing-wave ratio detection circuit 1 and the standing-wave ratio electrical tuning circuit 3 corresponding to the input port RF _ in of the automatic electrical tuning device, and is connected to the standing-wave ratio electrical tuning detection circuit 1 and the standing-wave ratio electrical tuning circuit The circuit 3 is connected.
Specifically, the standing wave refers to a distribution state in which two waves having the same frequency and opposite transmission directions are formed along the transmission line, one of which is a reflected wave of the other wave. An antinode occurs at the point where the two voltages or currents add, and a node occurs at the point where the two voltages or currents subtract. The Standing Wave Ratio is called as Voltage Standing Wave Ratio (VSWR), and is the Ratio of the Voltage of the antinode of the Standing Wave to the Voltage of the valley, also called as the Standing Wave coefficient. When the standing-wave ratio is equal to 1, the impedance of the feeder line and the impedance of the output port are completely matched, and at the moment, high-frequency energy is completely transmitted without energy reflection loss; when the standing-wave ratio is infinite, the total reflection is shown, and the energy is not radiated at all.
The voltage amplitudes are added to the maximum voltage amplitude Vmax to form an antinode at a place where the incident wave and the reflected wave have the same phase, and the voltage amplitudes are subtracted to the minimum voltage amplitude Vmin to form a valley at a place where the incident wave and the reflected wave have the opposite phase, and the amplitude values of the other points are between the antinode and the valley. This resultant wave is called a traveling standing wave, and the standing wave ratio is equal to the ratio of the voltage amplitude Vmax at the antinode of the standing wave to the voltage amplitude Vmin at the trough.
The measurement of the standing-wave ratio is one of the important indexes in the equipment of the communication system, and the quality or performance of the transmission signal of the communication system can be known through the standing-wave ratio. The impedance of the radio frequency system needs to be matched, and especially, the voltage standing wave ratio needs to meet certain requirements, because the frequency range is wide when the radio frequency system is used in a broadband, the standing wave ratio can change along with the frequency, and the impedance needs to be matched as much as possible in a wide range. Through standing-wave ratio detection, whether port radio-frequency signals are effectively transmitted or not can be obtained, in the radio-frequency field, standing-wave ratio testing is an important performance detection index item, and the smaller the port standing-wave ratio of a communication system is, the better the matching of system ports is, and the radio-frequency signals are effectively transmitted. With the development of the communication industry, the importance of standing-wave ratio debugging in the design of a communication system is more and more prominent, and higher requirements are also placed on the indexes of standing-wave ratio measurement.
As shown in fig. 1, the leftmost end of the standing-wave ratio automatic electrical tuning device is an input port RF _ in, the rightmost end of the standing-wave ratio automatic electrical tuning device is an output port RF _ out, a power amplifier 100 is further disposed in the standing-wave ratio automatic electrical tuning device, and a radio frequency signal input by the input port RF _ in is amplified by the power amplifier 100 and then output by the output port RF _ out. Taking an input port RF _ in of the standing-wave ratio automatic adjusting device as an example, the standing-wave ratio detecting circuit 1 detects the standing-wave ratio of the radio frequency signal of the input port RF _ in of the standing-wave ratio automatic electric adjusting device, the control circuit 2 is used for controlling the output voltage control signal to change constantly, acquiring a target standing-wave ratio according to the detected change condition of the standing-wave ratio and adjusting the output voltage control signal according to the target standing-wave ratio, and the standing-wave ratio electric adjusting circuit 3 is used for automatically adjusting the standing-wave ratio of the radio frequency signal of the input port RF _ in of the standing-wave ratio automatic electric adjusting device to the target standing-wave ratio according to the voltage control signal.
Specifically, the standing-wave ratio of the radio-frequency signal of the port corresponding to the automatic standing-wave ratio electrical tuning device can be detected, the voltage control signal is controlled to change constantly, a target standing-wave ratio is obtained according to the detected change condition of the standing-wave ratio in the process that the voltage control signal changes constantly, and the standing-wave ratio of the radio-frequency signal of the port corresponding to the automatic standing-wave ratio electrical tuning device is adjusted to the target standing-wave ratio. For example, the voltage control signal may be controlled to increase gradually and then decrease gradually on the basis of setting an initial value, or the voltage control signal may be controlled to decrease gradually and then increase gradually on the basis of setting an initial value, in a process that the voltage control signal is constantly changed, it is determined whether the detected standing-wave ratio is decreased, when the detected standing-wave ratio is not decreased, the standing-wave ratio at the time is determined to be the target standing-wave ratio, the output voltage control signal is adjusted, and the standing-wave ratio of the radio frequency signal at the input port RF _ in of the standing-wave ratio automatic electrical tuning device is automatically adjusted to the target standing-wave ratio by the standing-wave ratio electrical tuning circuit 3. Similarly, the automatic adjusting process of the standing-wave ratio of the output port RF _ out of the standing-wave ratio automatic power adjusting device is similar and will not be described herein.
Therefore, the embodiment of the disclosure can effectively detect the standing-wave ratio of the communication system and automatically debug the standing-wave ratio, improves the debugging passing rate of the standing-wave ratio in production and the automation degree of the communication equipment index debugging process, is beneficial to ensuring that the standing-wave ratio index of the communication equipment system in use can be always in an optimal state, can quickly and accurately self-adaptively achieve the optimal standing-wave ratio debugging effect, and effectively improves the production efficiency of the communication equipment and the use reliability of the communication equipment. In addition, the method is suitable for various communication devices needing standing-wave ratio debugging and detection, has wide application range, and can realize automatic debugging of the standing-wave ratio of the communication devices in different application occasions.
Fig. 2 is a schematic structural diagram of a standing-wave ratio electrical tuning circuit provided in the embodiment of the present disclosure. With reference to fig. 1 and fig. 2, the standing-wave ratio electronic tuning circuit 3 includes an electrical bridge 4, an input end a1 of the electrical bridge 4 is used for inputting a radio frequency signal, a through end a3 of the electrical bridge 4 is connected to the first reflection terminal 51, a coupling end a4 of the electrical bridge 4 is connected to the second reflection terminal 52, an output end a2 of the electrical bridge 4 is used for performing power synthesis on a reflection signal of the first reflection terminal 51 and a reflection signal of the second reflection terminal 52 and outputting the resultant signals, and the standing-wave ratio electronic tuning circuit 3 is used for automatically adjusting equivalent capacitance values of the first reflection terminal 51 and the second reflection terminal 52 according to a voltage control signal to adjust the standing-wave ratio of the radio frequency signal at a corresponding port of the standing-wave ratio electronic tuning.
Specifically, after the rf signal enters from the input end a1 of the bridge 4, the rf signal is divided into the through end a3 and the coupling end a4, that is, after being divided into centimeters, the rf signal enters into two ports with phases of 0 ° and-90 °, respectively, after the first reflection terminal 51 and the second reflection terminal 52 reflect the input rf signal, the two reflected signals are transmitted to the input end a1 of the bridge 4 again, and the two reflected signals are transmitted to the output end a2 of the bridge 4 again. Since the two ports 0 ° and-90 ° of the incoming rf signal from the input terminal a1 of the bridge 4 are equally divided and 90 ° out of phase, the reflected signals from the two ports have the same amplitude at the input terminal a1 of the bridge 4 and 180 ° out of phase, and the two reflected signals are completely cancelled at the input terminal a1 of the bridge 4. The two reflected signals have the same amplitude and the same phase at the output end a2, i.e. the coupling end, and are output via the output end a2, i.e. the coupling end, after power synthesis, so that the standing-wave ratio electrical modulation circuit 3 integrally realizes the phase shifting function.
By adjusting the impedance characteristics of the first reflection terminal 51 and the second reflection terminal 52 connected to the electric bridge 4, the difference loss and the standing-wave ratio of the radio-frequency signal transmitted by the electric bridge 4 can be effectively affected, and with reference to fig. 1 and fig. 2, the standing-wave ratio electric tuning circuit 3 according to the voltage control signal V _ ctr is set in the embodiment of the present disclosure, and the equivalent capacitance values of the first reflection terminal 51 and the second reflection terminal 52 can be automatically adjusted, so that the standing-wave ratio of the radio-frequency signal transmitted by the standing-wave ratio electric tuning circuit 3 can be adjusted, that is, the standing-wave ratio of the radio-frequency signal of the corresponding port of the standing-wave ratio automatic electric tuning device can be adjusted, the automation degree of the communication device index debugging process is improved, it is favorable for ensuring that the standing-wave ratio index of the communication device system in use can be always in an optimal state, and the production efficiency of.
Alternatively, with reference to fig. 1 and 2, it may be provided that the first reflective terminal 51 and the second reflective terminal 52 each include a varactor 6, the through terminal a3 of the bridge 4 is connected to the cathode of the varactor 6 in the first reflective terminal 51, the anode of the varactor 6 in the first reflective terminal 51 is connected to a set power signal, such as the ground terminal GND, the coupling terminal a4 of the bridge 4 is connected to the cathode of the varactor 6 in the second reflective terminal 52, and the anode of the varactor 6 in the second reflective terminal 5 is connected to a set power signal, such as the ground terminal GND.
Specifically, the varactor diode 6 may be, for example, a voltage-controlled varactor diode, and a parasitic inductance inside the varactor diode 6 serves as an L component, i.e., an inductance component, in the LC series circuit in the reflective terminal connected to the bridge 4. The voltage value of the voltage control signal V _ ctr output by the control circuit 2 changes, the capacitance value of the varactor diode 6 changes, after the control circuit 2 obtains the standing-wave ratio of the radio frequency signal of the corresponding port of the detected standing-wave ratio automatic electric tuning device, the output voltage control signal V _ ctr can be adjusted according to the corresponding algorithm, and then the standing-wave ratio of the radio frequency signal of the input end in1 or the output end out1 of the control bridge 4 is adjusted by adjusting the capacitance value of the varactor diode 6 in the standing-wave ratio electric tuning circuit 3, so as to cause the change of the reflection coefficient of the first reflection terminal 51 and the second reflection terminal 52, and the self-adaptive adjustment is automatically performed in real time according to the size of the standing-wave ratio calculated by detection and the control adjustment algorithm, so that the standing-wave ratio is always in the optimal state.
Optionally, as shown in fig. 1, the standing-wave ratio detection circuit 1 may be configured to include a power detection circuit 7 and a reflected power detection circuit 8, where the power detection circuit 7 is configured to detect power of a radio frequency signal at a port corresponding to the standing-wave ratio automatic electrical tuning device, and the reflected power detection circuit 8 is configured to detect reflected power of a radio frequency signal at a port corresponding to the standing-wave ratio automatic electrical tuning device.
Specifically, the control circuit 2 is connected to the power detection circuit 7 and the reflected power detection circuit 8, the power detection circuit 7 transmits the detected power of the radio frequency signal at the port corresponding to the standing-wave ratio automatic electrical tuning device to the control circuit 2, the reflected power detection circuit 8 transmits the detected reflected power of the radio frequency signal at the port corresponding to the standing-wave ratio automatic electrical tuning device to the control circuit 2, and the control circuit 2 can calculate the return loss of the radio frequency signal according to the received power and the reflected power of the radio frequency signal. Taking the power of the detected radio frequency signal as-30 dBm, the reflected power of the detected radio frequency signal as-50 dBm as an example, the return loss of the radio frequency signal is the difference between the power of the radio frequency signal and the reflected power, that is, the return loss RL of the radio frequency signal is equal to-30 dBm- (-50dBm) ═ 20dB, the conversion relation between the return loss RL and the standing-wave ratio VSWR is RL ═ 20lg [ (VSWR +1)/(VSWR-1) ], and the control circuit 2 can calculate the standing-wave ratio of the radio frequency signal of the corresponding port according to the power and the reflected power of the detected radio frequency signal. Exemplarily, the standing-wave ratio automatic electric tuning device may further include a display device connected to the control circuit 2, and the control circuit 2 may display the calculated standing-wave ratio of the radio frequency signal of the corresponding port on the display device as needed, so as to facilitate viewing by a user.
Alternatively, as shown in fig. 1, a first coupler 11 and a second coupler 12 may be sequentially connected in series between an input port RF _ in of the standing-wave ratio automatic electrical tuning device and a corresponding standing-wave ratio electrical tuning circuit 3, a power detection circuit 7 corresponding to the input port RF _ in is connected to the first coupler 11, a reflected power detection circuit 8 corresponding to the input port RF _ in is connected to the second coupler 12, or the power detection circuit 7 corresponding to the input port RF _ in is connected to the second coupler 12, and the reflected power detection circuit 8 corresponding to the input port RF _ in is connected to the first coupler 11, where fig. 1 exemplarily sets the power detection circuit 7 corresponding to the input port RF _ in to be connected to the first coupler 11, and the reflected power detection circuit 8 corresponding to the input port RF _ in to be connected to the second coupler 12.
A third coupler 13 and a fourth coupler 14 may be sequentially connected in series between an output port RF _ out of the standing-wave ratio automatic electrical tuning device and a corresponding standing-wave ratio electrical tuning circuit 3, a power detection circuit 7 corresponding to the output port RF _ out is connected to the third coupler 13, a reflected power detection circuit 8 corresponding to the output port RF _ out is connected to the fourth coupler 14, or the power detection circuit 7 corresponding to the output port RF _ out is connected to the fourth coupler 14, the reflected power detection circuit 8 corresponding to the output port RF _ out is connected to the third coupler 13, fig. 1 exemplarily sets the power detection circuit 7 corresponding to the output port RF _ out to be connected to the third coupler 13, and the reflected power detection circuit 8 corresponding to the output port RF _ out to be connected to the fourth coupler 14.
Specifically, a first coupler 11 and a second coupler 12 may be sequentially connected in series between the input port RF _ in of the standing-wave ratio automatic electric tuning device and the standing-wave ratio electric tuning circuit 3 on the left side in fig. 1, and a third coupler 13 and a fourth coupler 14 may be sequentially connected in series between the output port RF _ out of the standing-wave ratio automatic electric tuning device and the standing-wave ratio electric tuning circuit 3 on the right side in fig. 1. Taking the input port RF _ in as an example, after the RF signal passes through the first coupler 11, a part of the power is coupled into the power detection circuit 7 for input power detection, and the power detection circuit 7 converts the RF signal into an input power detection voltage. Similarly, after the rf signal passes through the second coupler 12, a part of the reflected input rf signal is coupled to the reflected power detection circuit 8 for use, and the reflected power detection circuit 8 converts the reflected input rf signal into a reflected input power detection voltage.
Therefore, the first coupler 11, the second coupler 12, the power detection circuit 7 corresponding to the input port RF _ in and the reflected power detection circuit 8 corresponding to the input port RF _ in can be used to detect the input power and the input reflected power of the radio frequency signal, the third coupler 13, the fourth coupler 14, the power detection circuit 7 corresponding to the output port RF _ out and the reflected power detection circuit 8 corresponding to the output port RF _ out can be used to detect the output power and the output reflected power of the radio frequency signal, the control circuit 2 can calculate the standing-wave ratio of the radio frequency signal at the input port of the standing-wave ratio automatic electric tuning device according to the detected input power and the detected input reflected power of the radio frequency signal, then automatically electrically tune the standing-wave ratio of the radio frequency signal at the input port of the standing-wave ratio automatic electric tuning device, when the standing-wave ratio of the detected radio frequency signal at the input port of the standing-wave ratio automatic tuning device is minimum, and finishing the standing-wave ratio electric regulation process of the input port. The standing-wave ratio of the radio frequency signal at the output port of the standing-wave ratio automatic electric tuning device can be automatically adjusted according to the same principle, and is not described herein again.
Fig. 3 is a schematic structural diagram of a power detection circuit according to an embodiment of the present disclosure, and the structure shown in fig. 3 may also be a reflected power detection circuit. With reference to fig. 1 to 3, the power detection circuit 7 and the reflected power detection circuit 8 may each include an attenuation network 9, a power detection chip 10 and an amplification circuit 13, and the power detection chip 10 is connected to the attenuation network 9 and the amplification circuit 13, respectively.
The attenuation network 9 is used for attenuating the power of the input radio frequency signal to a set power, the power detection chip 10 is used for converting the radio frequency signal after the power attenuation into a power detection voltage signal, and the amplifying circuit 13 is used for amplifying the power detection voltage signal by a set multiple and then outputting the power detection voltage signal. Specifically, the power detection chip 10 may be, for example, an LMH2110 model chip, the power detection circuit 7 or the reflected power detection circuit 8 attenuates an input radio frequency signal to a set power through the attenuation network 9, the attenuated radio frequency signal enters the power detection chip 10, the power detection chip 10 converts the radio frequency signal power into a power detection voltage signal, according to different use requirements, the power detection circuit 7 and the reflected power detection circuit 8 corresponding to the input port and the amplification circuit 13 in the power detection circuit 7 and the reflected power detection circuit 8 corresponding to the output port may include amplifiers with different amplification factors, and the power detection voltage enters the control circuit 2 for standing-wave ratio detection after being amplified by the amplification circuit 13.
The embodiment of the disclosure also provides an automatic electric tuning method for the standing-wave ratio. Fig. 4 is a schematic flow chart of a method for automatically electrically adjusting a standing-wave ratio according to an embodiment of the present disclosure, where the method for automatically electrically adjusting a standing-wave ratio may be executed by the apparatus for automatically electrically adjusting a standing-wave ratio according to the embodiment. As shown in fig. 4, the standing-wave ratio automatic electric tuning method includes:
s1, detecting the standing-wave ratio of the radio frequency signal of the corresponding port of the standing-wave ratio automatic electric adjusting device.
S2, the control voltage control signal is changed continuously.
Alternatively, with reference to fig. 1 to 3, the control voltage control signal varies continuously, and the control voltage control signal may be increased and then decreased based on a set initial value, or the control voltage control signal may be decreased and then increased based on a set initial value.
S3, obtaining a target standing-wave ratio according to the detected change condition of the standing-wave ratio, and adjusting the standing-wave ratio of the radio frequency signal of the corresponding port of the automatic electric adjusting device of the standing-wave ratio to the target standing-wave ratio.
Optionally, the target standing-wave ratio is obtained according to the detected change condition of the standing-wave ratio, whether the detected standing-wave ratio is smaller or not can be judged in the process that the voltage control signal is continuously changed, and when the detected standing-wave ratio is not smaller, the standing-wave ratio at the moment is determined to be the target standing-wave ratio.
Fig. 5 is a schematic specific flow chart of a method for automatically electrically tuning a standing-wave ratio according to an embodiment of the present disclosure. As shown in fig. 5, the standing-wave ratio automatic electric tuning method includes:
s101, starting.
S102, initializing, setting initial software operation parameters, and setting initial control values of the standing-wave ratio electric regulation circuit as a1 and b1 respectively.
And S103, reading the input power, the reflected input power, the output power and the reflected output power, and calculating to obtain an input standing wave ratio and an output standing wave ratio.
And S104, controlling the voltage value of the voltage control signal of the standing-wave ratio electric regulation circuit corresponding to the input port to increase progressively on the basis of a 1.
S105, judging whether the input standing wave ratio is reduced or not; if yes, executing S104; if not, go to S106.
S106, controlling the voltage value of the voltage control signal of the standing-wave ratio electric regulation circuit corresponding to the input port to be decreased on the basis of a 1.
S107, judging whether the input standing wave ratio is reduced or not; if yes, executing S106; if not, executing S108;
s108, judging whether the value of the input standing-wave ratio is an optimal value; if yes, go to S114; if not, S104 is executed.
And S109, controlling the voltage value of the voltage control signal of the standing-wave ratio electric regulation circuit corresponding to the output port to increase progressively on the basis of b 1.
S110, judging whether the output standing wave ratio is reduced or not; if yes, executing S109; if not, S111 is executed.
And S111, controlling the voltage value of the voltage control signal of the standing-wave ratio electric regulation circuit corresponding to the output port to be decreased on the basis of b 1.
S112, judging whether the output standing wave ratio is reduced or not; if yes, executing S111; if not, executing S113;
s113, judging whether the value of the output standing-wave ratio is an optimal value; if yes, go to S114; if not, S109 is executed.
And S114, ending.
In conclusion, the standing-wave ratio automatic electric tuning device effectively improves the debugging pass rate of the standing-wave ratio and the automation degree of the communication equipment index debugging process, is suitable for various communication equipment needing standing-wave ratio debugging and detection, is wide in application range, can effectively detect the standing-wave ratio of a communication system and automatically debug the standing-wave ratio, and therefore improves the production efficiency of the communication equipment and the use reliability of the communication equipment.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present disclosure, which enable those skilled in the art to understand or practice the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The automatic electric adjusting device for the standing-wave ratio is characterized by comprising:
the standing-wave ratio detection circuit is used for detecting the standing-wave ratio of the radio frequency signal of the corresponding port of the automatic standing-wave ratio electric adjusting device; wherein the port comprises an input port and/or an output port;
the control circuit is connected with the standing-wave ratio detection circuit and is used for controlling the voltage control signal output by the control circuit to change constantly, acquiring a target standing-wave ratio according to the detected change condition of the standing-wave ratio and adjusting the output voltage control signal according to the target standing-wave ratio;
and the standing-wave ratio electric adjusting circuit is connected with the control circuit and is used for automatically adjusting the standing-wave ratio of the radio frequency signal of the corresponding port of the standing-wave ratio automatic electric adjusting device to the target standing-wave ratio according to the voltage control signal.
2. The standing-wave ratio automatic electric tuning device according to claim 1, wherein the standing-wave ratio electric tuning circuit comprises an electric bridge, an input end of the electric bridge is used for inputting a radio frequency signal, a straight-through end of the electric bridge is connected with a first reflection terminal, a coupling end of the electric bridge is connected with a second reflection terminal, and an output end of the electric bridge is used for performing power synthesis on a reflection signal of the first reflection terminal and a reflection signal of the second reflection terminal and then outputting the synthesized reflection signals;
the standing-wave ratio electric adjusting circuit is used for automatically adjusting equivalent capacitance values of the first reflection terminal and the second reflection terminal according to the voltage control signal so as to adjust the standing-wave ratio of the radio-frequency signal of the corresponding port of the standing-wave ratio electric adjusting device.
3. The standing-wave ratio automatic electronic tuning device according to claim 2, wherein the first and second reflective terminals each comprise a varactor.
4. The standing-wave ratio automatic electric tuning device according to claim 3, wherein a pass-through end of the bridge is connected to a cathode of the varactor in the first reflective terminal, and an anode of the varactor in the first reflective terminal is connected to a set power signal;
and the coupling end of the electric bridge is connected with the cathode of the variable capacitance diode in the second reflection terminal, and the anode of the variable capacitance diode in the second reflection terminal is connected with a set power supply signal.
5. The standing-wave ratio automatic electric tuning device according to claim 1, wherein the standing-wave ratio detection circuit comprises:
the power detection circuit is used for detecting the power of the radio frequency signal of the corresponding port of the standing-wave ratio automatic electric adjusting device;
and the reflected power detection circuit is used for detecting the reflected power of the radio frequency signal of the corresponding port of the standing-wave ratio automatic electric adjusting device.
6. The standing-wave ratio automatic electric tuning device according to claim 5, wherein the power detection circuit and the reflected power detection circuit each include:
the attenuation network is used for attenuating the power of the input radio frequency signal to a set power;
the power detection chip is connected with the attenuation network and used for converting the radio-frequency signal after power attenuation into a power detection voltage signal;
and the amplifying circuit is connected with the power detection chip and is used for amplifying the power detection voltage signal by a set multiple and then outputting the amplified power detection voltage signal.
7. The standing-wave ratio automatic electric adjusting device according to claim 5, characterized in that a first coupler and a second coupler are connected in series in sequence between an input port of the standing-wave ratio automatic electric adjusting device and the corresponding standing-wave ratio electric adjusting circuit;
the power detection circuit corresponding to the input port is connected with the first coupler, and the reflected power detection circuit corresponding to the input port is connected with the second coupler; or, the power detection circuit corresponding to the input port is connected to the second coupler, and the reflected power detection circuit corresponding to the input port is connected to the first coupler;
a third coupler and a fourth coupler are sequentially connected in series between an output port of the standing-wave ratio automatic electric adjusting device and the corresponding standing-wave ratio electric adjusting circuit;
the power detection circuit corresponding to the output port is connected with the third coupler, and the reflected power detection circuit corresponding to the output port is connected with the fourth coupler; alternatively, the power detection circuit corresponding to the output port is connected to the fourth coupler, and the reflected power detection circuit corresponding to the output port is connected to the third coupler.
8. A standing-wave ratio automatic electric tuning method, characterized by being performed by the standing-wave ratio automatic electric tuning device according to any one of claims 1 to 7, the standing-wave ratio automatic electric tuning method comprising:
detecting the standing-wave ratio of a radio frequency signal of a corresponding port of the automatic electric adjusting device of the standing-wave ratio;
controlling the voltage control signal to change continuously;
and acquiring a target standing-wave ratio according to the detected change condition of the standing-wave ratio, and adjusting the standing-wave ratio of the radio frequency signal of the corresponding port of the automatic electric modulation device of the standing-wave ratio to the target standing-wave ratio.
9. The method for automatically electrically adjusting the standing-wave ratio according to claim 8, wherein the controlling the voltage control signal to be constantly changed comprises:
controlling the voltage control signal to increase gradually and then decrease gradually on the basis of setting an initial value; or controlling the voltage control signal to decrease and then increase on the basis of setting an initial value.
10. The method for automatically electrically tuning the standing-wave ratio according to claim 9, wherein the obtaining of the target standing-wave ratio according to the detected change of the standing-wave ratio comprises:
judging whether the detected standing-wave ratio is reduced or not in the process that the voltage control signal is continuously changed;
and when the detected standing-wave ratio is not changed any more, determining the standing-wave ratio at the moment as the target standing-wave ratio.
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| CN113411057A (en) * | 2021-07-30 | 2021-09-17 | 广州慧智微电子有限公司 | Power amplification device, method and equipment |
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