Method and device for monitoring state of antenna feeder system and antenna feeder system

Abstract

The application discloses a kind of state monitoring method, device and antenna feeder system of antenna feeder system.The state monitoring device of antenna feeder system includes: temperature detection module, for detecting system ambient temperature;Signal measurement module, for coupling radio frequency signal, output forward coupling signal and reverse coupling signal, and respectively after power division processing and phase shift processing to forward coupling signal and reverse coupling signal output, control module, for determining forward signal power and reverse signal power according to received signal, according to system ambient temperature, forward signal power and reverse signal power are temperature compensated, and determine standing wave ratio according to the forward signal power and reverse signal power after compensation, and according to standing wave ratio, the state of antenna feeder system is monitored.The state monitoring method, device and antenna feeder system of antenna feeder system described above, can accurately determine standing wave ratio, and then real-time monitoring antenna feeder system state.

Description

Technical Field

[0001] This invention relates to the field of communication technology, and in particular to a method, device and antenna system for monitoring the status of an antenna feeder system. Background Technology

[0002] The antenna system, as the front end for radio frequency signal transmission and reception, consists of two parts: an antenna system and a feeder system. The antenna system primarily enables wireless signal transmission, acting as a relay station. It converts free-space radio electromagnetic waves into high-frequency current signals in the feeder circuit, or vice versa. The feeder system is mainly responsible for signal transmission within the feeder line, connecting the radio frequency transmitting / receiving section to the antenna system.

[0003] In related technologies, the antenna feeder system of vehicle-mounted wireless access units is mainly inspected and maintained manually. This method is not only inefficient, but also wastes the time and energy of maintenance personnel and affects daily operations. Moreover, for various reasons, the feeder system signal cannot be backed up. Once a fault occurs, it will hinder the transmission of the signal. In the case of a more serious accident, it may even damage the front-end radio frequency module. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. Therefore, one object of this invention is to provide an antenna feeder system status monitoring device, which can monitor the status of the antenna feeder system in real time based on the standing wave ratio (VSWR).

[0005] The second objective of this invention is to propose an antenna feeder system.

[0006] The third objective of this invention is to propose a method for monitoring the status of an antenna feeder system.

[0007] To achieve the above objectives, a first aspect of the present invention provides an antenna feeder system status monitoring device, comprising: a temperature detection module for detecting the system ambient temperature; a signal measurement module for coupling radio frequency signals, outputting a forward coupled signal and a reverse coupled signal, and performing power division processing and phase shift processing on the forward coupled signal and the reverse coupled signal respectively to obtain orthogonal first forward coupled signal and second forward coupled signal, as well as orthogonal first reverse coupled signal and second reverse coupled signal; and a control module for determining the forward signal power based on the orthogonal first forward coupled signal and second forward coupled signal, determining the reverse signal power based on the orthogonal first reverse coupled signal and second reverse coupled signal, performing temperature compensation on the forward signal power and the reverse signal power based on the system ambient temperature, determining the standing wave ratio (SWR) based on the compensated forward signal power and reverse signal power, and monitoring the antenna feeder system status based on the SWR.

[0008] According to the antenna feeder system status monitoring device of the present invention, power division and phase shifting are performed on the forward and reverse coupling signals of the radio frequency signal, respectively, to obtain orthogonal first and second forward coupling signals and orthogonal first and second reverse coupling signals. Based on the orthogonal first and second forward coupling signals, the forward signal power with effective elimination of phase difference influence is obtained, and the reverse signal power with effective elimination of phase difference influence is obtained. Temperature compensation is performed on the forward and reverse signal power in combination with the system ambient temperature to further improve the detection accuracy of the forward and reverse signal power. Thus, a more accurate standing wave ratio can be determined based on the compensated forward and reverse signal power, and the antenna feeder system status can be effectively monitored in real time based on the standing wave ratio.

[0009] In some embodiments of the present invention, the signal measurement module includes: a directional coupler for coupling the radio frequency signal and outputting the forward coupled signal and the reverse coupled signal; a first power divider for power-dividing the forward coupled signal and outputting a third forward coupled signal and a fourth forward coupled signal; a first phase-shifting unit for phase-shifting the third forward coupled signal and the fourth forward coupled signal respectively and outputting the orthogonal first forward coupled signal and the second forward coupled signal; a second power divider for power-dividing the reverse coupled signal and outputting a third reverse coupled signal and a fourth reverse coupled signal; and a second phase-shifting unit for phase-shifting the third reverse coupled signal and the fourth reverse coupled signal respectively and outputting the orthogonal first reverse coupled signal and the second reverse coupled signal.

[0010] In some embodiments of the present invention, the first phase shifting unit includes a first phase shifter and a second phase shifter. The first phase shifter is used to increase the phase of the third forward coupling signal by 90° to output the first forward coupling signal, and the second phase shifter is used to decrease the phase of the fourth forward coupling signal by 90° to output the second forward coupling signal.

[0011] In some embodiments of the present invention, the second phase shifting unit includes a third phase shifter and a fourth phase shifter. The third phase shifter is used to increase the phase of the third reverse coupling signal by 90° to output the first reverse coupling signal, and the fourth phase shifter is used to decrease the phase of the fourth reverse coupling signal by 90° to output the second reverse coupling signal.

[0012] In some embodiments of the present invention, the signal measurement module further includes first to fourth detector diodes, which are respectively disposed corresponding to the output terminals of the first phase shifter to the fourth phase shifter. The signal measurement module is used to detect the voltages of the first forward coupled signal and the second forward coupled signal, as well as the voltages of the first reverse coupled signal and the second reverse coupled signal, respectively, through the first to fourth detector diodes. The control module is used to determine the forward signal power based on the voltages of the first forward coupled signal and the second forward coupled signal, and to determine the reverse signal power based on the voltages of the first reverse coupled signal and the second reverse coupled signal.

[0013] In some embodiments of the present invention, the control module is further configured to determine a power compensation value based on the system ambient temperature and a pre-set correspondence, and to perform temperature compensation on the positive signal power and the reverse signal power based on the power compensation value.

[0014] In some embodiments of the present invention, the control module calculates the standing wave ratio using the following formula: Where VSWR represents the standing wave ratio, P r P represents the power of the compensated reverse signal. f This represents the positive signal power after compensation.

[0015] In some embodiments of the present invention, the control module is further configured to issue an alarm message when the standing wave ratio is greater than a preset threshold.

[0016] To achieve the above objectives, a second aspect of the present invention provides an antenna feeder system, which includes the antenna feeder system status monitoring device described in any of the above embodiments.

[0017] According to the antenna feeder system of the present invention, by performing power division and phase shifting processing on the forward and reverse coupling signals of the radio frequency signal respectively, orthogonal first and second forward coupling signals and orthogonal first and second reverse coupling signals are obtained. Based on the orthogonal first and second forward coupling signals, the forward signal power with effective elimination of phase difference influence is obtained, and the reverse signal power with effective elimination of phase difference influence is obtained. Temperature compensation is performed on the forward and reverse signal power in combination with the system ambient temperature, further improving the detection accuracy of the forward and reverse signal power. Thus, a more accurate standing wave ratio can be determined based on the compensated forward and reverse signal power, and the antenna feeder system status can be effectively monitored in real time based on the standing wave ratio.

[0018] To achieve the above objectives, a third aspect of the present invention provides a method for monitoring the status of an antenna feeder system. The method includes: detecting the system ambient temperature; coupling a radio frequency signal to obtain a forward coupled signal and a reverse coupled signal, and performing power division processing and phase shifting processing on the forward coupled signal and the reverse coupled signal respectively to obtain orthogonal first forward coupled signal and second forward coupled signal, as well as orthogonal first reverse coupled signal and second reverse coupled signal; determining the forward signal power based on the orthogonal first forward coupled signal and second forward coupled signal, and determining the reverse signal power based on the orthogonal first reverse coupled signal and second reverse coupled signal; performing temperature compensation on the forward signal power and the reverse signal power based on the system ambient temperature, and determining the standing wave ratio (SWR) based on the compensated forward signal power and reverse signal power; and monitoring the status of the antenna feeder system based on the SWR.

[0019] According to the antenna feeder system status monitoring method of the present invention, power division and phase shifting are performed on the forward and reverse coupling signals of the radio frequency signal, respectively, to obtain orthogonal first and second forward coupling signals and orthogonal first and second reverse coupling signals. The forward signal power with effective elimination of phase difference influence is obtained based on the orthogonal first and second forward coupling signals, and the reverse signal power with effective elimination of phase difference influence is obtained based on the orthogonal first and second reverse coupling signals. Temperature compensation is performed on the forward and reverse signal power in combination with the system ambient temperature to further improve the detection accuracy of the forward and reverse signal power. Thus, a more accurate standing wave ratio can be determined based on the compensated forward and reverse signal power, and the status of the antenna feeder system can be effectively monitored in real time based on the standing wave ratio.

[0020] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] Figure 1 This is a structural block diagram of an antenna feeder system status monitoring device according to an embodiment of the present invention;

[0022] Figure 2 This is a structural block diagram of an orthogonal directional coupling measurement device related to the technology;

[0023] Figure 3 This is a structural block diagram of the signal measurement module of an antenna feeder system status monitoring device according to an embodiment of the present invention;

[0024] Figure 4 This is a structural block diagram of an antenna feeder system according to an embodiment of the present invention;

[0025] Figure 5 This is a flowchart illustrating a method for monitoring the status of an antenna feeder system according to an embodiment of the present invention;

[0026] Figure 6 This is a flowchart illustrating a method for monitoring the status of an antenna feeder system according to another embodiment of the present invention;

[0027] Figure 7 This is a flowchart illustrating a method for monitoring the status of an antenna feeder system according to another embodiment of the present invention.

[0028] Explanation of key component symbols:

[0029] Antenna feeder system 1000, antenna feeder system status monitoring device 100, temperature detection module 10, signal measurement module 20, directional coupler 21, first power divider 22, first phase shifter unit 23, first phase shifter 231, second phase shifter 232, second power divider 24, second phase shifter unit 25, third phase shifter 251, fourth phase shifter 252, first detector diode 26, second detector diode 27, third detector diode 28, fourth detector diode 29, control module 30, radio frequency module 200, antenna 300. Detailed Implementation

[0030] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0031] Please see Figure 1 The antenna feeder system status monitoring device 100 proposed in this invention includes a temperature detection module 10, a signal measurement module 20, and a control module 30. The temperature detection module 10 is used to detect the system ambient temperature. The signal measurement module 20 is used to couple radio frequency signals, outputting a forward coupled signal A and a reverse coupled signal B, and performs power division and phase shifting processing on the forward coupled signal A and the reverse coupled signal B respectively to obtain orthogonal first forward coupled signal A1 and second forward coupled signal A2, and orthogonal first reverse coupled signal B1 and second reverse coupled signal B2. The control module 30 is used to determine the forward signal power based on the orthogonal first forward coupled signal A1 and second forward coupled signal A2, and determine the reverse signal power based on the orthogonal first reverse coupled signal B1 and second reverse coupled signal B2. It also performs temperature compensation on the forward and reverse signal power based on the system ambient temperature, determines the standing wave ratio (SWR) based on the compensated forward and reverse signal power, and monitors the antenna feeder system status based on the SWR.

[0032] According to the embodiment of the present invention, the antenna feeder system status monitoring device 100 performs power division processing and phase shift processing on the forward coupling signal A and the reverse coupling signal B of the radio frequency signal respectively to obtain orthogonal first forward coupling signal A1 and second forward coupling signal A2, as well as orthogonal first reverse coupling signal B1 and second reverse coupling signal B2. Based on the orthogonal first forward coupling signal A1 and second forward coupling signal A2, the forward signal power with effective elimination of phase difference influence is obtained. Based on the orthogonal first reverse coupling signal B1 and second reverse coupling signal B2, the reverse signal power with effective elimination of phase difference influence is obtained. Temperature compensation is performed on the forward signal power and reverse signal power in combination with the system ambient temperature to further improve the detection accuracy of the forward signal power and reverse signal power. Thus, a more accurate standing wave ratio can be determined based on the compensated forward signal power and reverse signal power, and the antenna feeder system status can be effectively monitored in real time based on the standing wave ratio.

[0033] It's understandable that the voltage standing wave ratio (VSWR) is a crucial indicator for troubleshooting antenna feeder systems, as monitoring the VSWR can effectively monitor the system's status. The VSWR is the correlation ratio between the forward and reverse signals during transmission, reflecting signal loss during transmission. The VSWR determines the efficiency of the antenna feeder system's transmitted signal; a lower VSWR results in a smaller reflected signal and higher efficiency. Under normal operating conditions, with a fixed transmit power and signal frequency, the VSWR value of the feeder system remains essentially constant. By sampling the radio frequency signal using the directional coupler in the VSWR detection circuit, the forward coupling signal corresponding to the forward signal and the reverse coupling signal corresponding to the reverse signal can be obtained. The obtained forward and reverse coupling signals can be used to calculate parameters such as reflection coefficient and VSWR. Ideally, the directional coupler only couples unidirectional signals. However, due to the limited directional isolation of the actual directional coupler, the reverse coupling signal is greatly affected by the phase difference between the forward and reverse signals, resulting in crosstalk between the obtained forward and reverse coupling signals. Therefore, it is impossible to accurately measure the forward and reverse signal power of the radio frequency signal based on the forward and reverse coupling signals, and thus it is impossible to accurately determine the VSWR.

[0034] To improve the accuracy of VSWR detection, phase difference calculation is required. This demands high precision in phase measurement of both forward and reverse coupled signals and is complex to implement, making it difficult to achieve satisfactory results. In related technologies, orthogonal directional coupling measurement devices are used to improve the detection accuracy of reverse coupled signals, such as... Figure 2As shown, coupler 1 and coupler 2 are orthogonal. The sum of the reverse-coupled signals output from the two reverse-coupled terminals can eliminate phase interference, thus more accurately representing the signal power. However, this method requires that the isolation, coupling, and other parameters of the two couplers be precisely consistent. Furthermore, the introduction of two couplers increases power loss, circuit space and weight, circuit complexity, and reduces reliability.

[0035] The antenna system status monitoring device 100 of this embodiment uses a directional coupler 21 to couple radio frequency signals. By performing power division and phase shifting processing on the forward coupled signal A and the reverse coupled signal B respectively, orthogonal first forward coupled signal A1 and second forward coupled signal A2, as well as orthogonal first reverse coupled signal B1 and second reverse coupled signal B2, can be obtained. The forward signal power is determined based on the orthogonal first forward coupled signal A1 and second forward coupled signal A2, and the reverse signal power is determined based on the orthogonal first reverse coupled signal B1 and second reverse coupled signal B2, thereby effectively eliminating the influence of phase difference and improving detection accuracy. Furthermore, considering that the performance of the directional coupler 21 and other radio frequency devices may change under different temperatures, affecting detection accuracy, the antenna system status monitoring device 100 of this embodiment also includes a temperature detection module 10 for detecting the system ambient temperature and sending the detected system ambient temperature to the control module 30. This allows for temperature compensation of the measured forward and reverse signal power based on the detected system ambient temperature, reducing measurement errors caused by changes in system ambient temperature and further improving detection accuracy.

[0036] Specifically, the temperature detection module 10 is connected to the control module 30. In some embodiments, the temperature detection module 10 directly sends the system ambient temperature to the control module 30 after each detection, so that the control module 30 can perform temperature compensation control based on the received system ambient temperature. In some embodiments, the temperature detection module 10 sends all system ambient temperatures detected within a preset number of times to the control module 30, so that the control module 30 can calculate the average system ambient temperature based on the received multiple system ambient temperatures and perform temperature compensation control based on the average value. In some embodiments, the temperature detection module 10 continuously detects the system ambient temperature, and when the number of detections reaches a preset number, calculates the average value of all system ambient temperatures detected within the preset number of times, and sends this average value as the system ambient temperature to the control module 30, so that the control module 30 can perform temperature compensation control more accurately based on the received system ambient temperature. This is not limited to any particular embodiment.

[0037] The temperature detection module 10 may include a temperature sensor. The system ambient temperature may include the temperature of the directional coupler 21. The temperature sensor may be attached to the surface of the directional coupler 21 for contact measurement of the temperature of the directional coupler 21, or the temperature sensor may be kept at a certain distance from the directional coupler 21 for non-contact measurement of the temperature of the directional coupler 21. The temperature sensor can accurately determine the temperature of the directional coupler 21, thereby enabling temperature compensation of the forward signal power and reverse signal power determined based on the coupling output signal of the directional coupler 21.

[0038] The signal input terminal of the signal measurement module 20 is connected to the radio frequency module 200, and the signal output terminal of the signal measurement module 20 is connected to the antenna 300. The radio frequency signal generated by the radio frequency module 200 can be transmitted to the antenna 300 through the signal measurement module 20 and radiated into free space through the antenna 300. The measurement output terminal of the signal measurement module 20 is connected to the control module 30 to send the measured voltages of the first forward coupling signal A1, the second forward coupling signal A2, the first reverse coupling signal B1, and the second reverse coupling signal to the control module 30.

[0039] It should be noted that the orthogonal first forward coupling signal A1 and second forward coupling signal A2, as well as the orthogonal first reverse coupling signal B1 and second reverse coupling signal B2, refer to the fact that the first forward coupling signal A1 obtained by phase shifting is orthogonal to the third forward coupling signal A3 before phase shifting, the second forward coupling signal A2 obtained by phase shifting is orthogonal to the fourth forward coupling signal A4 before phase shifting, the first reverse coupling signal B1 obtained by phase shifting is orthogonal to the third reverse coupling signal B3 before phase shifting, and the second reverse coupling signal B2 obtained by phase shifting is orthogonal to the fourth reverse coupling signal B4 before phase shifting.

[0040] Please see Figure 3In some embodiments of the present invention, the signal measurement module 20 includes a directional coupler 21, a first power divider 22, a first phase-shifting unit 23, a second power divider 24, and a second phase-shifting unit 25. The directional coupler 21 couples radio frequency signals, outputting a forward-coupled signal A and a reverse-coupled signal B. The first power divider 22 performs power division processing on the forward-coupled signal A, outputting a third forward-coupled signal A3 and a fourth forward-coupled signal A4. The first phase-shifting unit 23 performs phase-shifting processing on the third forward-coupled signal A3 and the fourth forward-coupled signal A4, respectively, outputting an orthogonal first forward-coupled signal A1 and a second forward-coupled signal A2. The second power divider 24 performs power division processing on the reverse-coupled signal B, outputting a third reverse-coupled signal B3 and a fourth reverse-coupled signal B4. The second phase-shifting unit 25 performs phase-shifting processing on the third reverse-coupled signal B3 and the fourth reverse-coupled signal B4, respectively, outputting an orthogonal first reverse-coupled signal B1 and a second reverse-coupled signal B2.

[0041] This facilitates the elimination of the influence of phase difference. In subsequent processing, the forward signal power can be accurately determined based on the first forward coupling signal A1 and the second forward coupling signal A2, and the reverse signal power can be accurately determined based on the first reverse coupling signal B1 and the second reverse coupling signal B2.

[0042] Specifically, the directional coupler 21 is a four-port device, comprising a signal input terminal, a signal output terminal, a coupling terminal, and an isolation terminal. The radio frequency (RF) signal generated by the RF module 200 is input to the directional coupler 21 through its signal input terminal and output from its signal output terminal. The directional coupler 21 couples the forward and reverse signals transmitted in the RF channel to the coupling terminal and the isolation terminal in a certain ratio. The coupling terminal is used to couple the output of the forward coupled signal A corresponding to the forward signal, and the isolation terminal is used to couple the output of the reverse coupled signal B corresponding to the reverse signal. By calculating the power ratio of the reverse coupled signal B to the forward coupled signal A, the reflection coefficient can be determined, and thus the standing wave ratio (VSWR) can be determined. In one example, the directional coupler used is the SYDC-20-31HP+, a 20dB directional coupler.

[0043] The input terminal of the first power divider 22 is connected to the coupling terminal of the directional coupler 21, and the output terminal of the first power divider 22 is connected to the input terminal of the first phase shifting unit 23. The forward coupling signal A output from the coupling terminal is processed by the first power divider 22 to generate a third forward coupling signal A3 and a fourth forward coupling signal A4, which are identical. The third forward coupling signal A3 and the fourth forward coupling signal A4 are output from the output terminal of the first power divider 22 and enter the first phase shifting unit 23. The first phase shifting unit 23 performs phase shifting processing on the third forward coupling signal A3 to obtain a first forward coupling signal A1 orthogonal to the third forward coupling signal A3, and performs phase shifting processing on the fourth forward coupling signal A4 to obtain a second forward coupling signal A2 orthogonal to the fourth forward coupling signal A4, which are different from the first forward coupling signal A1.

[0044] The input terminal of the second power divider 24 is connected to the isolation terminal of the directional coupler 21, and the output terminal of the second power divider 24 is connected to the input terminal of the second phase shifting unit 25. The reverse coupling signal B output from the coupling terminal is processed by the second power divider 24 to generate a third reverse coupling signal B3 and a fourth reverse coupling signal B4, which are identical. The third reverse coupling signal B3 and the fourth reverse coupling signal B4 are output from the output terminal of the second power divider 24 and enter the second phase shifting unit 25. The second phase shifting unit 25 performs phase shifting processing on the third reverse coupling signal B3 to obtain a first reverse coupling signal B1 orthogonal to the third reverse coupling signal B3, and performs phase shifting processing on the fourth reverse coupling signal B4 to obtain a second reverse coupling signal B2 orthogonal to the fourth reverse coupling signal B4, where the first reverse coupling signal B1 is different from the second reverse coupling signal B2.

[0045] Please see Figure 3 In some embodiments of the present invention, the first phase shifting unit 23 includes a first phase shifter 231 and a second phase shifter 232. The first phase shifter 231 is used to increase the phase of the third positive coupling signal A3 by 90° to output the first positive coupling signal A1. The second phase shifter 232 is used to decrease the phase of the fourth positive coupling signal A4 by 90° to output the second positive coupling signal A2.

[0046] In this way, a first positive coupling signal A1 orthogonal to the third positive coupling signal A3 and a second positive coupling signal A2 orthogonal to the fourth positive coupling signal A4 can be obtained, and the phase difference between the first positive coupling signal A1 and the second positive coupling signal A2 is 180°. The effect of the phase difference can be effectively removed after the first positive coupling signal A1 and the second positive coupling signal A2 are added together.

[0047] Specifically, the first power divider 22 includes a first output terminal and a second output terminal. The input terminal of the first phase shifter 231 is connected to the first output terminal of the first power divider 22. The third positive coupling signal A3 output from the first output terminal of the first power divider 22 enters the first phase shifter 231 through the input terminal of the first phase shifter 231 and is phase-shifted by the first phase shifter 231. The input terminal of the second phase shifter 232 is connected to the second output terminal of the first power divider 22. The fourth positive coupling signal A4 output from the second output terminal of the first power divider 22 enters the second phase shifter 232 through the input terminal of the second phase shifter 232 and is phase-shifted by the second phase shifter 232.

[0048] Please see Figure 3 In some embodiments of the present invention, the second phase shifting unit 25 includes a third phase shifter 251 and a fourth phase shifter 252. The third phase shifter 251 is used to increase the phase of the third reverse coupling signal B3 by 90° to output the first reverse coupling signal B1. The fourth phase shifter 252 is used to decrease the phase of the fourth reverse coupling signal B4 by 90° to output the second reverse coupling signal B2.

[0049] In this way, a first reverse coupling signal B1 orthogonal to the third reverse coupling signal B3 and a second reverse coupling signal B2 orthogonal to the fourth reverse coupling signal B4 can be obtained. The phase difference between the first reverse coupling signal B1 and the second reverse coupling signal B2 is 180°. The effect of the phase difference can be effectively removed after the first reverse coupling signal B1 and the second reverse coupling signal B2 are added together.

[0050] Specifically, the second power divider 24 includes a third output terminal and a fourth output terminal. The input terminal of the third phase shifter 251 is connected to the third output terminal of the second power divider 24. The third reverse coupling signal B3 output from the third output terminal of the second power divider 24 enters the third phase shifter 251 through its input terminal and is phase-shifted by the third phase shifter 251. The input terminal of the fourth phase shifter 252 is connected to the fourth output terminal of the second power divider 24. The fourth reverse coupling signal B4 output from the fourth output terminal of the second power divider 24 enters the fourth phase shifter 252 through its input terminal and is phase-shifted by the fourth phase shifter 252.

[0051] The following analysis will explain the principle of removing the phase difference effect after adding the first reverse coupling signal B1 and the second reverse coupling signal B2:

[0052] It is understandable that the coupling degree of a directional coupler reflects the sampling ratio of the RF signal at the sampling end, while its directivity reflects the degree of isolation between the signal input end and the reverse sampling end, and between the signal output end and the forward sampling end. An ideal directional coupler has infinite directivity, but in practical applications, it is usually impossible to achieve ideal directivity. Incident waves may be inserted into the isolation end used to extract the reverse coupled signal, thus introducing errors into the entire measurement system. To accurately measure the VSWR, it is necessary to minimize the errors caused by the low directivity of the directional coupler.

[0053] Assume the amplitude of the signal coupled to the coupling end is A, and the phase difference between the coupled inverted signal and the forward signal is... If the coupler direction parameter is D and the reflection coefficient is Γ, then the signal coupling level is:

[0054]

[0055]

[0056] Among them, V f Forward coupling signal level, V r This is the reverse coupling signal level.

[0057] To address the impact of phase difference on the detection of coupled signals from directional couplers, an orthogonal directional coupling measurement method is employed to optimize the measurement accuracy of the directional coupler. For example... Figure 3 As shown, taking the reverse-coupled signal B as an example, the reverse-coupled signal B obtained by the directional coupler 21 is divided into a third reverse-coupled signal B3 and a fourth reverse-coupled signal B4 by the second power divider 24. After phase shifting by the second phase shifter 232, the phase-shifted first reverse-coupled signal B1 and the second reverse-coupled signal B2 are obtained. The level V of the first reverse-coupled signal... r1 Second reverse coupling signal level V r2 By taking measurements, we can obtain:

[0058]

[0059]

[0060]

[0061] In this invention, the reverse coupling signal level V obtained by adding the first reverse coupling signal B1 and the second reverse coupling signal B2 is... r本As shown in formula (6), it can be seen from formula (6) that the addition of the first reverse coupling signal B1 and the second reverse coupling signal B2 eliminates the influence of the phase difference. Thus, the present invention avoids the problem of inaccurate detection results caused by not considering the influence of phase when determining the standing wave ratio in related technologies, and improves the accuracy of standing wave ratio detection.

[0062] It is understandable that the principle of removing the phase difference effect after adding the first forward coupling signal A1 and the second forward coupling signal A2 is the same as the principle described above. To avoid redundancy, it will not be elaborated here.

[0063] In some embodiments of the present invention, the signal measurement module 20 further includes first to fourth detector diodes, which are respectively configured to correspond to the output terminals of the first phase shifter 231 to the fourth phase shifter 252. The signal measurement module 20 is used to detect the voltages of the first forward coupling signal A1 and the second forward coupling signal A2, as well as the voltages of the first reverse coupling signal B1 and the second reverse coupling signal B2, through the first to fourth detector diodes. The control module 30 is used to determine the forward signal power based on the voltages of the first forward coupling signal A1 and the second forward coupling signal A2, and to determine the reverse signal power based on the voltages of the first reverse coupling signal B1 and the second reverse coupling signal B2.

[0064] In this way, the control module 30 can obtain positive signal power and reverse signal power that eliminate the influence of phase difference.

[0065] Specifically, the signal measurement module 20 includes a first detector diode 26, a second detector diode 27, a third detector diode 28, and a fourth detector diode 29. The anode of the first detector diode 26 is connected to the output terminal of the first phase shifter 231, and the cathode of the first detector diode 26 serves as the first measurement output terminal of the signal measurement module 20 to output the voltage of the first forward coupled signal A1. The anode of the second detector diode 27 is connected to the output terminal of the second phase shifter 232, and the cathode of the second detector diode 27 serves as the second measurement output terminal of the signal measurement module 20 to output the voltage of the second forward coupled signal A2. The anode of the third detector diode 28 is connected to the output terminal of the third phase shifter 251, and the cathode of the third detector diode 28 serves as the third measurement output terminal of the signal measurement module 20 to output the voltage of the first reverse coupled signal B1. The positive terminal of the fourth detector diode 29 is connected to the output terminal of the fourth phase shifter 252, and the negative terminal of the fourth detector diode 29 serves as the fourth measurement output terminal of the signal measurement module 20 to output the voltage of the second reverse coupling signal B2.

[0066] Furthermore, the control module 30 is used to calculate a first sum of the voltage of the first forward coupling signal A1 and the voltage of the second forward coupling signal A2, and determine the forward signal power based on the first sum and the load (antenna), and to calculate a second sum of the voltage of the first reverse coupling signal B1 and the voltage of the second reverse coupling signal B2, and determine the reverse signal power based on the second sum and the load (antenna).

[0067] In some embodiments of the present invention, the control module 30 is further configured to determine a power compensation value based on the system ambient temperature and a pre-set correspondence, and to perform temperature compensation on the positive signal power and the reverse signal power based on the power compensation value.

[0068] In this way, temperature compensation can be performed quickly and accurately for both forward and reverse signal power.

[0069] Specifically, a pre-established correspondence between different system ambient temperatures and power compensation values ​​can be created and stored in the control module 30. After determining the forward and reverse signal power, the control module 30 can determine the corresponding power compensation value based on the system ambient temperature and this correspondence, and then perform temperature compensation on the forward and reverse signal power according to this power compensation value. The correspondence can be stored in tabular form. In one example, after determining the power compensation value, the sum of the power compensation value and the forward signal power is calculated, and the result is used as the compensated forward signal power; simultaneously, the sum of the power compensation value and the reverse signal power is calculated, and the result is used as the compensated reverse signal power.

[0070] In some embodiments of the present invention, the control module 30 calculates the standing wave ratio using the following formula: Where VSWR represents the standing wave ratio, P r P represents the power of the compensated reverse signal. f This represents the positive signal power after compensation.

[0071] Thus, after determining the compensated reverse signal power and the compensated forward signal power, the corresponding VSWR can be calculated using the formula.

[0072] Specifically, the standing wave ratio (SWR) can be monitored at preset time intervals, that is, the SWR is determined once every preset time interval. By shortening the preset time interval, the real-time performance of the SWR monitoring can be improved, thereby achieving the effect of real-time monitoring of the SWR, which is also the real-time monitoring of the antenna feeder system status.

[0073] In some embodiments of the present invention, the control module 30 is also used to issue an alarm message when the standing wave ratio is greater than a preset threshold.

[0074] This allows users to promptly troubleshoot the antenna feeder system based on alarm information, preventing damage to the RF module 200. It is understandable that when the VSWR exceeds the preset threshold, the reflected signal power is high, potentially damaging the RF module 200.

[0075] Specifically, the alarm information may include at least one of the following: audible alarm information, text alarm information, animated alarm information, and indicator light alarm information. In one example, the preset threshold is 1.3, meaning that when the VSWR is greater than 1.3, the control module 30 can promptly issue an alarm information.

[0076] Please see Figure 4 The present invention proposes an antenna feeder system 1000, which includes the antenna feeder system status monitoring device 100 of any of the above embodiments.

[0077] According to the antenna feeder system of the present invention, by performing power division and phase shifting processing on the forward and reverse coupling signals of the radio frequency signal respectively, orthogonal first and second forward coupling signals and orthogonal first and second reverse coupling signals are obtained. Based on the orthogonal first and second forward coupling signals, the forward signal power with effective elimination of phase difference influence is obtained, and the reverse signal power with effective elimination of phase difference influence is obtained. Temperature compensation is performed on the forward and reverse signal power in combination with the system ambient temperature, further improving the detection accuracy of the forward and reverse signal power. Thus, a more accurate standing wave ratio can be determined based on the compensated forward and reverse signal power, and the antenna feeder system status can be effectively monitored in real time based on the standing wave ratio.

[0078] It should be noted that the above explanation of the implementation method and beneficial effects of the antenna feeder system status monitoring device 100 also applies to the antenna feeder system of this embodiment. To avoid redundancy, it will not be elaborated in detail here.

[0079] This invention proposes a method for monitoring the status of an antenna feeder system. This method can be implemented using the antenna feeder system status monitoring device 100 of this invention. Please refer to [link / reference]. Figure 5 The status monitoring of the antenna feeder system includes the following steps:

[0080] S11: Detects the ambient temperature of the system;

[0081] S13: Couple the radio frequency signal to obtain a forward coupled signal and a reverse coupled signal, and perform power division processing and phase shift processing on the forward coupled signal and the reverse coupled signal respectively to obtain an orthogonal first forward coupled signal and a second forward coupled signal, as well as an orthogonal first reverse coupled signal and a second reverse coupled signal.

[0082] S15: Determine the forward signal power based on the orthogonal first forward coupling signal and the second forward coupling signal, and determine the reverse signal power based on the orthogonal first reverse coupling signal and the second reverse coupling signal;

[0083] S17: Perform temperature compensation on the forward and reverse signal power based on the system ambient temperature, determine the standing wave ratio (SWR) based on the compensated forward and reverse signal power, and monitor the status of the antenna feeder system based on the SWR.

[0084] According to the antenna feeder system status monitoring method of the present invention, power division and phase shifting are performed on the forward and reverse coupling signals of the radio frequency signal, respectively, to obtain orthogonal first and second forward coupling signals and orthogonal first and second reverse coupling signals. The forward signal power with effective elimination of phase difference influence is obtained based on the orthogonal first and second forward coupling signals, and the reverse signal power with effective elimination of phase difference influence is obtained based on the orthogonal first and second reverse coupling signals. Temperature compensation is performed on the forward and reverse signal power in combination with the system ambient temperature to further improve the detection accuracy of the forward and reverse signal power. Thus, a more accurate standing wave ratio can be determined based on the compensated forward and reverse signal power, and the status of the antenna feeder system can be effectively monitored in real time based on the standing wave ratio.

[0085] Please see Figure 6 In some embodiments of the present invention, step S13, "performing power division processing and phase shifting processing on the forward-coupled signal and the reverse-coupled signal respectively to obtain orthogonal first forward-coupled signal and second forward-coupled signal, and orthogonal first reverse-coupled signal and second reverse-coupled signal", includes:

[0086] S131: Perform power division processing on the forward coupled signal to output the third forward coupled signal and the fourth forward coupled signal;

[0087] S133: Perform phase shifting processing on the third and fourth forward coupling signals respectively, and output orthogonal first and second forward coupling signals;

[0088] S135: Performs power splitting on the reverse coupling signal and outputs the third and fourth reverse coupling signals;

[0089] S137: Perform phase shifting processing on the third and fourth reverse coupling signals respectively, and output orthogonal first and second reverse coupling signals.

[0090] In some embodiments of the present invention, step S133 includes: increasing the phase of the third forward coupling signal by 90° to output the first forward coupling signal, and decreasing the phase of the fourth forward coupling signal by 90° to output the second forward coupling signal.

[0091] In some embodiments of the present invention, step S137 includes: increasing the phase of the third reverse coupling signal by 90° to output the first reverse coupling signal, and decreasing the phase of the fourth reverse coupling signal by 90° to output the second reverse coupling signal.

[0092] Please see Figure 7 In some embodiments of the present invention, step S15 includes:

[0093] S151: Determine the voltages of the first forward coupling signal and the second forward coupling signal, as well as the voltages of the first reverse coupling signal and the second reverse coupling signal;

[0094] S153: Determine the forward signal power based on the voltages of the first forward coupling signal and the second forward coupling signal, and determine the reverse signal power based on the voltages of the first reverse coupling signal and the second reverse coupling signal.

[0095] In some embodiments of the present invention, step S17, "performing temperature compensation for the forward signal power and the reverse signal power based on the system ambient temperature", includes: determining a power compensation value based on the system ambient temperature and a pre-set correspondence, and performing temperature compensation for the forward signal power and the reverse signal power based on the power compensation value.

[0096] In some embodiments of the present invention, the standing wave ratio is calculated using the following formula: Where VSWR represents the standing wave ratio, P r P represents the power of the compensated reverse signal. f This represents the positive signal power after compensation.

[0097] In some embodiments of the present invention, step S17, "monitoring the status of the antenna feeder system based on the standing wave ratio", includes: issuing an alarm message when the standing wave ratio is greater than a preset threshold.

[0098] It should be noted that the above explanation of the implementation method and beneficial effects of the antenna feeder system status monitoring device 100 also applies to the antenna feeder system status monitoring method of this embodiment. To avoid redundancy, it will not be elaborated in detail here.

[0099] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0100] Furthermore, the terms "first," "second," etc., used in the embodiments of this invention are for descriptive purposes only and should not be construed as indicating or implying relative importance, or implicitly specifying the number of technical features indicated in this embodiment. Therefore, features defined with terms such as "first" and "second" in the embodiments of this invention can explicitly or implicitly indicate that the embodiment includes at least one of those features. In the description of this invention, the word "multiple" means at least two or more, such as two, three, four, etc., unless otherwise explicitly specified in the embodiments.

[0101] In this invention, unless otherwise explicitly specified or limited in the embodiments, the terms "installation," "connection," "joining," and "fixing" appearing in the embodiments should be interpreted broadly. For example, a connection can be a fixed connection, a detachable connection, or an integral part; it can also be a mechanical connection, an electrical connection, etc. Of course, it can also be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components, or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific implementation.

[0102] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A status monitoring device for an antenna feeder system, characterized in that, include: Temperature detection module, used to detect the system ambient temperature; The signal measurement module is used to couple radio frequency signals, output forward coupled signals and reverse coupled signals, and perform power division processing and phase shift processing on the forward coupled signals and the reverse coupled signals respectively; The signal measurement module includes: a directional coupler for coupling the radio frequency signal and outputting the forward coupled signal and the reverse coupled signal; a first power divider for power-dividing the forward coupled signal and outputting a third forward coupled signal and a fourth forward coupled signal; a first phase-shifting unit for phase-shifting the third forward coupled signal and the fourth forward coupled signal respectively and outputting a first forward coupled signal and a second forward coupled signal; a second power divider for power-dividing the reverse coupled signal and outputting a third reverse coupled signal and a fourth reverse coupled signal; and a second phase-shifting unit for phase-shifting the third reverse coupled signal and the fourth reverse coupled signal respectively and outputting a first reverse coupled signal and a second reverse coupled signal. The first forward coupling signal is orthogonal to the third forward coupling signal, the second forward coupling signal is orthogonal to the fourth forward coupling signal, the first reverse coupling signal is orthogonal to the third reverse coupling signal, and the second reverse coupling signal is orthogonal to the fourth reverse coupling signal. The control module is configured to determine the forward signal power based on the first forward coupling signal and the second forward coupling signal, determine the reverse signal power based on the first reverse coupling signal and the second reverse coupling signal, perform temperature compensation on the forward signal power and the reverse signal power based on the system ambient temperature, determine the standing wave ratio (SWR) based on the compensated forward signal power and the reverse signal power, and monitor the antenna feeder system status based on the SWR.

2. The antenna feeder system status monitoring device according to claim 1, characterized in that, The first phase shifting unit includes a first phase shifter and a second phase shifter. The first phase shifter is used to increase the phase of the third forward coupling signal by 90° to output the first forward coupling signal. The second phase shifter is used to decrease the phase of the fourth forward coupling signal by 90° to output the second forward coupling signal.

3. The antenna feeder system status monitoring device according to claim 2, characterized in that, The second phase shifting unit includes a third phase shifter and a fourth phase shifter. The third phase shifter is used to increase the phase of the third reverse coupling signal by 90° to output the first reverse coupling signal. The fourth phase shifter is used to decrease the phase of the fourth reverse coupling signal by 90° to output the second reverse coupling signal.

4. The antenna feeder system status monitoring device according to claim 3, characterized in that, The signal measurement module further includes first to fourth detector diodes, which are respectively disposed at the output terminals of the first phase shifter to the fourth phase shifter. The signal measurement module is used to detect the voltages of the first forward coupled signal and the second forward coupled signal, as well as the voltages of the first reverse coupled signal and the second reverse coupled signal, respectively through the first to fourth detector diodes. The control module is used to determine the forward signal power based on the voltages of the first forward coupled signal and the second forward coupled signal, and to determine the reverse signal power based on the voltages of the first reverse coupled signal and the second reverse coupled signal.

5. The antenna feeder system status monitoring device according to any one of claims 1-4, characterized in that, The control module is also used to determine the power compensation value based on the system ambient temperature and a pre-set correspondence, and to perform temperature compensation on the positive signal power and the reverse signal power based on the power compensation value.

6. The antenna feeder system status monitoring device according to claim 5, characterized in that, The control module calculates the standing wave ratio using the following formula: ,in, Indicates standing bobbly, This represents the power of the inverted signal after compensation. This represents the positive signal power after compensation.

7. The antenna feeder system status monitoring device according to any one of claims 1-4, characterized in that, The control module is also used to issue an alarm message when the standing wave ratio is greater than a preset threshold.

8. An antenna feeder system, characterized in that, Includes the antenna feeder system status monitoring device according to any one of claims 1-7.

9. A method for monitoring the status of an antenna feeder system, characterized in that, include: Detect the ambient temperature of the system; The method involves coupling radio frequency signals to obtain forward coupled signals and reverse coupled signals, and then performing power division and phase shifting processing on the forward coupled signals and the reverse coupled signals, respectively. This includes: performing power division processing on the forward coupled signals to output a third forward coupled signal and a fourth forward coupled signal; performing phase shifting processing on the third forward coupled signal and the fourth forward coupled signal to output a first forward coupled signal and a second forward coupled signal; performing power division processing on the reverse coupled signals to output a third reverse coupled signal and a fourth reverse coupled signal; and performing phase shifting processing on the third reverse coupled signal and the fourth reverse coupled signal to output a first reverse coupled signal and a second reverse coupled signal. The first forward coupling signal is orthogonal to the third forward coupling signal, the second forward coupling signal is orthogonal to the fourth forward coupling signal, the first reverse coupling signal is orthogonal to the third reverse coupling signal, and the second reverse coupling signal is orthogonal to the fourth reverse coupling signal. The forward signal power is determined based on the first forward coupling signal and the second forward coupling signal, and the reverse signal power is determined based on the first reverse coupling signal and the second reverse coupling signal. Temperature compensation is performed on the forward signal power and the reverse signal power based on the system ambient temperature, and the standing wave ratio (SWR) is determined based on the compensated forward signal power and the reverse signal power. The status of the antenna feeder system is monitored based on the SWR.

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