Shortwave receiving antenna tuning method and system thereof

Abstract

The invention provides a shortwave antenna tuning system comprising a shortwave whip antenna, an antenna adapter, a multi-path coupler and a multi-channel receiver. The multi-channel receiver comprises a receiving channel, a channel digital signal processing module, a frequency synthesizer module, a main control module, a front panel module, a power supply module, and a cabinet with a CPCI bus. The receiving channel receives shortwave radio frequency signals and carries out mixing, filtering and amplifying processing on the signals. The frequency synthesizer module provides a standard frequency signal needed by the channel digital signal processing module and provides and outputs a local oscillation signal to the receiving channel at the same time. The shortwave signal is converted into a high and medium frequency signal through mixing, and a 16-bit A / D is used to carry out analog to digital conversion in the channel digital signal processing module. At the same time, the channel digital signal processing module is connected with the antenna adapter and the multi-path coupler by using serial ports, the received shortwave radio frequency signals are outputted to the multi-path coupler through adjusting the matched impedance by the antenna adapter, and the multi-path coupler outputs the signals to the multi-channel receiver.

Description

1. Technical field [0001] The invention belongs to electronic circuit design, short-wave receiving antenna tuning method and system. 2. Background technology [0002] In short-wave communication, the signal will be affected by the change of the ionosphere, and sometimes the signal-to-noise ratio of the received signal is relatively low; at the same time, a similar situation will occur in the communication environment with relatively large surrounding noise, which will greatly affect the short-wave The communication effect of the communication system. In the past, in order to improve the receiving effect, people have done some work in antenna selection, filtering and coding and decoding, and have achieved certain results; but few people have considered improving the impedance matching capability of the receiving antenna. 3. Content of the Invention [0003] The purpose of the present invention is to design for a short-wave multi-channel integrated communication system. Th...

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Problems solved by technology

[0002] In short-wave communication, the signal will be affected by changes in the ionosphere, and sometimes the signal-to-noise ratio of the received signal is low; at the same time, a similar situation will occur in a communication environment with relatively high noise around, which will greatly affect short-wave The communication effect of the communication system

In the past, in order to improve the receiving effect, people have done some work on antenna selection, filtering, encoding and decoding, etc., and have achieved certain results; but few people have considered improving the impedance matching ability of the receiving antenna.

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