Method for improving reliability of short-wave antenna feeder system

Abstract

The invention belongs to the technical field of application of short-wave communication equipment, and particularly relates to a method for improving the reliability of a short-wave antenna feeder system, which is suitable for a system for realizing impedance matching between a short-wave transceiver and an antenna by using an antenna tuner, and comprises the following steps of: setting a tuning network in the antenna tuner to be in a straight-through state; detecting antenna impedance through a control circuit in the antenna tuner to obtain first impedance data, judging and storing the first impedance data through a detection and judgment program, determining whether a frequency set comprising a plurality of antenna frequency points needs to be tuned or not, if so, controlling a tuning network to tune the frequency set, and if not, controlling the tuning network to tune the frequency set; the frequency set is not tuned. Under the condition that the antenna impedance and the tuning frequency are not changed, repeated tuning is not needed any more, the relay switching frequency is reduced, and the reliability of an antenna tuning and antenna feeder system is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of short-wave communication equipment applications, and particularly relates to a method for improving the reliability of a short-wave antenna-feeder system. Background Art

[0002] A short-wave communication system consists of a short-wave transceiver, a short-wave antenna tuner (hereinafter referred to as "antenna tuner"), a short-wave antenna (hereinafter referred to as "antenna"), and a microprocessor. Among them, the antenna tuner and the antenna are called the short-wave antenna-feeder system. The antenna tuner is between the short-wave transceiver and the antenna, realizing the impedance matching between the two, so that the power of the transceiver can be efficiently transmitted to the antenna.

[0003] In the short-wave antenna-feeder system, the antenna tuner usually consists of a control circuit and a tuning network. The control circuit is used for protocol command processing and antenna impedance detection, etc. The tuning network controls the on or off of the tuning components (matching inductance coils and matching capacitors) through relays to achieve the purpose of antenna impedance matching. When the antenna tuner is tuning, it requires the relays to frequently switch to control the tuning components. However, the switching times of the relays are usually within 100,000 times. The frequent switching actions will cause the service life of the relays to decline, affecting the reliability of the antenna tuner.

[0004] Especially with the development of short-wave communication, technologies such as fast adaptability and networking functions are gradually applied. When a short-wave radio uses fast adaptability and networking functions, the frequencies in the frequency set need to be in a tuned and transmittable state. Therefore, currently, every time a short-wave radio is powered on or enters a specific mode, it is necessary to tune a frequency set containing a large number of frequency points, which further accelerates the consumption of the relay life. Even when the antenna and the tuning frequency remain unchanged, repeated tuning is still carried out, wasting a large number of relay switching times, reducing the reliability of the antenna tuner, and further reducing the reliability of the antenna-feeder system.

[0005] In view of this, the inventor of the present invention provides a method for improving the reliability of a short-wave antenna-feeder system to solve the above technical problems. Summary of the Invention

[0006] The purpose of the present invention is to overcome the above-mentioned disadvantages of the prior art and propose a method for improving the reliability of a short-wave antenna-feeder system. It is applicable to an impedance matching system between a short-wave transceiver and an antenna realized by an antenna tuner, which can reduce the number of repeated tunings, greatly reduce the switching actions of the relays in the tuning network, and improve the reliability of the antenna-feeder system.

[0007] To achieve the above purpose, the present invention adopts the following technical solutions:

[0008] The present invention provides a method for improving the reliability of a short-wave antenna-feed system. The tuning network in the antenna tuner is set to a direct-through state, and then the control circuit in the antenna tuner is used to detect the antenna impedance to obtain first impedance data. The first impedance data is judged and stored to determine whether it is necessary to tune a frequency set including multiple antenna frequency points. If tuning is required, the tuning network is controlled to tune the frequency set; otherwise, the frequency set is not tuned.

[0009] Further, the short-wave antenna-feed system includes a microprocessor, and a tuning program and a detection and judgment program are stored on the microprocessor.

[0010] Further, the tuning program is used to control the relay of the tuning network to switch to complete tuning or direct-through.

[0011] Further, the detection and judgment program is stored on the microprocessor. Specifically, the detection and judgment program is as follows: controlling the impedance detection circuit of the control circuit to detect the current antenna impedance, obtaining the first impedance data and storing it, and then comparing the current first impedance data with the previously stored first impedance data. If the two are inconsistent, the frequency set is tuned; otherwise, the frequencies in the currently required tuning frequency set are compared with the frequencies in the previously stored frequency set. If the frequencies in the frequency set remain unchanged, the frequency set is not tuned; otherwise, the frequency set is tuned.

[0012] Further, the short-wave communication frequency band of 2 MHz to 29.9999 MHz is divided into levels, and the first impedance data is the antenna impedance data corresponding to the frequency points of each level.

[0013] Further, the short-wave communication frequency band of 2 MHz to 29.9999 MHz is divided into three levels, specifically: low frequency of 2.0000 MHz to 10.0000 MHz, intermediate frequency of 10 MHz to 20 MHz, and high frequency of 20 MHz to 29.9999 MHz.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] A method for improving the reliability of a short-wave antenna-feed system provided by the present invention includes a microprocessor, an impedance detection circuit, and a tuning network. By setting a tuning program and a detection and judgment program on the microprocessor, it is realized that when the antenna impedance and the tuning frequency remain unchanged, repeated tuning is no longer performed, the number of relay switches is reduced, and the reliability of the antenna tuner and the antenna-feed system is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings herein are incorporated into the specification and constitute a part of the specification, and are used together with the specification to explain the principles of the present invention.

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a hardware composition diagram of a short-wave antenna-feed system;

[0019] Figure 2 It is a flowchart of the method for improving the reliability of the short-wave antenna-feed system of the present invention. Specific embodiments

[0020] Here, the exemplary embodiments will be described in detail. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present invention. On the contrary, they are only examples consistent with some aspects of the present invention detailed in the appended claims.

[0021] Please refer to Figures 1 to 2 , an embodiment of the present invention provides a method for improving the reliability of a short-wave antenna-feed system. In this embodiment, a tuning program and a detection and judgment program are stored on a microprocessor, and the short-wave antenna-feed system is composed of a microprocessor, an impedance detection circuit, and a tuning network (such as Figure 1 , the present invention does not limit the form of the tuning network), and each component of it can share the hardware circuit of the original vector antenna tuner.

[0022] Among them, the microprocessor is used to store and run programs; the impedance detection circuit is used to detect the antenna impedance and the tuning state at each frequency point, and the tuning network is used to change the tuning elements according to the control command to complete tuning.

[0023] Set the tuning network in the antenna tuner to the through state, then detect the antenna impedance through the control circuit in the antenna tuner to obtain the first impedance data, judge and store the first impedance data through the detection and judgment program, and determine whether it is necessary to tune the frequency set including multiple antenna frequency points. If tuning is required, control the tuning network to tune the frequency set, otherwise, do not tune the frequency set.

[0024] Further, the short-wave antenna-feed system includes a microprocessor, and a tuning program is stored on the microprocessor. The tuning program is used to control the relay of the tuning network to switch to complete tuning or through.

[0025] Further, the detection and judgment program is stored on a microprocessor. Specifically, the detection and judgment program is as follows: controlling the impedance detection circuit of the control circuit to detect the current antenna impedance, obtaining the first impedance data and storing it, and then comparing the current first impedance data with the first impedance data stored last time. If the two are inconsistent, the frequency set is tuned; otherwise, the frequencies in the current frequency set to be tuned are compared with the frequencies in the frequency set stored last time. If the frequencies in the frequency set remain unchanged, the frequency set is not tuned; otherwise, the frequency set is tuned.

[0026] Further, the shortwave communication frequency band of 2 MHz to 29.9999 MHz is divided into levels, and the first impedance data is the antenna impedance data corresponding to the frequency points of each level.

[0027] Specifically, the shortwave communication frequency band of 2 MHz to 29.9999 MHz is divided into three levels, specifically: low frequency of 2.0000 MHz to 10.0000 MHz, medium frequency of 10 MHz to 20 MHz, and high frequency of 20 MHz to 29.9999 MHz.

[0028] Specifically, in this embodiment, when the vector antenna tuner is powered on, the tuning network can be set to the direct-through position. The impedance detection circuit selects the frequency points in the low, medium, and high frequency bands within the shortwave frequency band (2 MHz to 29.9999 MHz) to check and store the antenna impedance, and compares it with the antenna impedance data stored last time. When the impedance data is consistent, it is considered that the antenna impedance remains unchanged; otherwise, it is considered that the antenna impedance has changed, and the frequency set is tuned. When the antenna impedance remains unchanged, the frequencies in the frequency set to be tuned are compared with the frequencies in the frequency set stored last time. If the frequencies in the frequency set remain unchanged, the frequency set is not tuned; otherwise, the frequency set is tuned.

[0029] To illustrate the efficacy of the present invention, the following experiments were conducted on the present invention:

[0030] Applying the present invention to the antenna tuner, it has been verified that when the load antenna and the frequency set of the antenna tuner remain unchanged, the number of frequency points to be tuned at startup of the antenna tuner is reduced from the original 256 to 10, greatly reducing the switching times of the antenna tuner relay, improving the reliability of the antenna tuner and the antenna-feeding system, and at the same time reducing the startup time of the shortwave radio.

[0031] Specifically, the experimental data before improvement is as follows:

[0032] Frequency points in the frequency set start to be tuned

[0033]

[0034]

[0035]

[0036] The preparation for the antenna tuner startup is completed, and normal operation begins.

[0037] Test conclusion: 1) For 256 frequency points within the frequency set, a total of 256 tuning operations are performed, and the total number of relay switching operations is 2372 times;

[0038] 2) The total tuning time for the frequency set is 10752 ms.

[0039] Specifically, the experimental data after improvement (the method of the present invention) are as follows:

[0040] Antenna impedance detection starts:

[0041] Freq = 2.0000 Rs: 388.82 Xs: -1974.71;

[0042] Freq = 4.0000 Rs: 6.30 Xs: -142.25;

[0043] Freq = 7.0000 Rs: 3.84 Xs: -25.36;

[0044] Freq = 10.0000 Rs: 3.73 Xs: 4.68;

[0045] Freq = 12.0000 Rs: 2.68 Xs: 17.31;

[0046] Freq = 15.0000 Rs: 8.01 Xs: 45.97;

[0047] Freq = 18.0000 Rs: 32.99 Xs: 99.68;

[0048] Freq = 20.0000 Rs: 117.27 Xs: -152.19;

[0049] Freq = 25.0000 Rs: 28.43 Xs: -52.61;

[0050] Freq = 29.0000 Rs: 21.92 Xs: -11.37;

[0051] The antenna impedance remains unchanged.

[0052] When comparing the frequency points within the frequency set, the frequency points within the frequency set remain unchanged.

[0053] The preparation for the antenna tuner startup is completed, and normal operation begins.

[0054] Test conclusion: 1) The antenna tuner detects the antenna impedance, the tuning network is set to the direct-through state, and the total number of relay switching operations is 5 times;

[0055] 2) It takes 231 ms to detect the antenna impedance with the antenna tuner;

[0056] 3) The total comparison time for the frequency points within the frequency set is 542 ms.

[0057] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention.

[0058] It should be understood that the present invention is not limited to the above-described content and can be variously modified and changed without departing from its scope. The scope of the present invention is only limited by the appended claims.

Claims

1. A method for improving the reliability of a shortwave antenna feed system, characterized in that: The method includes setting a tuning network in an antenna tuner to a through state, then detecting antenna impedance through a control circuit in the antenna tuner to obtain first impedance data, judging and storing the first impedance data through a detection and judgment program, determining whether a frequency set including multiple antenna frequency points needs to be tuned, and if tuning is required, controlling the tuning network to tune the frequency set, otherwise, not tuning the frequency set.

2. The method for improving the reliability of the shortwave antenna feed system according to claim 1, characterized in that: The shortwave antenna feed system comprises a microprocessor, on which a tuning program and a detection and judgment program are stored.

3. The method for improving the reliability of the shortwave antenna feed system according to claim 2, characterized in that: The tuning program is used to control the relays of the tuning network to switch to complete tuning or direct connection.

4. The method for improving the reliability of a shortwave antenna feed system according to claim 2, characterized in that: The detection and judgment program is stored on a microprocessor, and the detection and judgment program is specifically as follows: the impedance detection circuit of the control circuit is controlled to detect the current antenna impedance, obtain the first impedance data and store it, and then compare the current first impedance data with the first impedance data stored last time. If the two are inconsistent, the frequency set is tuned; otherwise, the frequency set that needs to be tuned currently is compared with the frequency in the frequency set stored last time. If the frequency in the frequency set does not change, the frequency set is not tuned, otherwise, the frequency set is tuned.

5. The method for improving the reliability of a shortwave antenna feed system according to claim 1, characterized in that: The shortwave communication frequency band of 2MHz to 29.9999MHz is divided into grades, and the first impedance data is the antenna impedance data corresponding to the frequency points of each grade.

6. The method for improving the reliability of a shortwave antenna feed system according to claim 5, characterized in that: The shortwave communication frequency band 2MHz to 29.9999MHz is divided into three levels, specifically: low frequency 2.0000MHz to 10.0000MHz, medium frequency 10MHz to 20MHz, and high frequency 20MHz to 29.9999MHz.

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