A shortwave postselector

Abstract

The invention proposes a short-wave back selector, which includes a cylinder body, a first partition, a second partition, a bracket, a coil frame, a filter circuit board and a control system. A resonant cavity, a control cavity, two A first radio frequency hole and six second radio frequency holes, two first partitions are fixedly connected in the resonant cavity in parallel and divide the resonant cavity into three independent cavities, and each independent cavity of the resonant cavity is filled with Transformer oil, the filter circuit board is fixedly connected to the bottom of the bracket, there is a gap between the filter circuit board and the upper and lower walls of the independent cavity of the resonant cavity, and the control system is fixedly installed in the control cavity; the filter adopts parallel resonance Tuning in the same way, and the use of relays as switches, which greatly increases the peak-to-peak voltage that the resonant capacitors participating in the resonance and the relays can withstand, increases the number of resonant capacitors, and is used to share the power on the resonant capacitor when the circuit is turned on. Thereby reducing the technical indicators required by each component.

Description

technical field [0001] The invention relates to the technical field of digital tuning frequency hopping communication, in particular to a short-wave postselector. Background technique [0002] In recent years, with the rapid development of electronic technology, the application of radio communication technology has become more and more extensive. Frequency hopping technology is a spread spectrum technology with high anti-interference and high anti-intercept ability. The carrier frequency of the traditional fixed-frequency communication system is fixed, and the anti-interference performance is poor. It is easy to intercept the transmitted information, or find the position of the communication machine and expose the target. Improving radio communication performance and improving its anti-interference ability has become an important topic in the innovation and development of communication technology. The short-wave postselector plays an important role in suppressing unwanted si...

AI Technical Summary

Problems solved by technology

[0003] At present, the input power of the traditional postselector is small, and it cannot input high-power signals

After research, it is found that the reason is that the peak-to-peak voltage of the resonant capacitor in the traditionally designed circuit structure is low, and the components in the device cannot meet the technical requirements for receiving high-power signals. Can generate a lot of heat and easily cause damage to internal components

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