Network signal anti-interference transmission device

Abstract

According to a network signal anti-interference transmission device, a signal frequency modulation circuit receives a signal source at the signal input end, baseband frequency signals are generated through an oscillation circuit, and the baseband frequency signals enter an impedance conversion circuit after being further subjected to frequency modulation through an automatic tuning circuit and enter a modulation circuit after being subjected to isolation, follow-up amplification and further isolation, so that the signal precision is improved; the frequency hopping control circuit generates a carrier signal by using an oscillation circuit; after frequency multiplication by the frequency multiplier, signals are output to the modulation circuit. A linkage tuning loop follows the automatic tuning loop to control the frequency of a carrier signal to change frequency points. Harmonic frequency interference with a carrier signal after frequency multiplication of the interference signal is avoided. A detector circuit feeds back a signal after frequency multiplication. On one hand, the effect of stabilizing the oscillation amplitude is achieved, on the other hand, automatic frequency multiplication and frequency modulation are achieved during amplitude attenuation, same-frequency interference in transmission is avoided, the modulation circuit modulates a high-frequency carrier signal and a baseband frequency signal through a triode Q5, and finally frequency selection is conducted through an LC tuning loop, that is, pilot-frequency interference is avoided, and then the signals are output toa transmitter.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a network signal anti-interference transmission device. Background technique [0002] Frequency hopping communication has attracted much attention because of its good confidentiality, anti-far and near effect and anti-interference performance. It is widely used in modern military short-wave, ultra-short wave and data link communication equipment. In the actual application process, frequency hopping depends on The frequency points and the establishment of communication links are planned in advance, and the wireless network signal transmission uses the above-mentioned frequency hopping technology to achieve the purpose of anti-interference in small and undemanding places such as households and smart communities. Applicable, and with the increasingly complex electromagnetic environment and the increasingly dense electromagnetic signals, more and more useless signals and artif...

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Problems solved by technology

[0004] In view of the above situation, in order to overcome the defects of the prior art, the object of the present invention is to provide a network signal anti-interference transmission device, which effectively solves the problem that the prior art is not suitable for small and less demanding places and still exists in the signal transmission. interference problem

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