Anti-jamming System of Wideband Spaceborne Receiver

Abstract

The invention discloses an anti-jamming system for a wideband on-board receiver, aiming to provide an anti-jamming system with versatility, high stability and high reliability, and capable of suppressing various interference capabilities in the working platform of the on-board receiver. The present invention is realized by the following technical solutions: the broadband space-borne receiver adopts a three-fold frequency conversion scheme, and the input end uses a radio frequency frequency sorting circuit to suppress an interference signal before mixing; a mixer adopts the local oscillator frequency to fold up and down the emission rate. Mixing technology, an intermediate frequency is selected by the intermediate frequency frequency sorting circuit between the first mixer and the second mixer; the first intermediate frequency and the local oscillator signal of the second stage mixer are mixed to produce a fixed second intermediate frequency, and the power is divided into two outputs. , one channel forms an intermediate frequency broadband radar detection channel, and the other channel is mixed with the local oscillator of the triple mixer to produce a low intermediate frequency, which is output as a communication channel through an intermediate frequency power division filter component. The invention strengthens interference suppression through radio frequency frequency sorting measures, improves the anti-interference ability and reduces the design difficulty of the local oscillator and the intermediate frequency.

Description

technical field [0001] The invention relates to a high-sensitivity radio frequency receiver and a broadband receiver interference suppression system that can be directly applied to various platforms. Background technique [0002] With the development of spaceborne receiver technology and the improvement of user requirements: wide operating frequency, high sensitivity, and large dynamic range, the interference of the receiver itself determines the difficulty of its implementation; at the same time, the equipment in the satellite working platform is becoming more and more complex and the system functions The function is more and more powerful, and the interference in the satellite working platform restricts the realization of the receiver function. The electromagnetic interference of wideband satellite-borne receivers is divided into fixed frequency interference between equipment in the satellite working platform, power supply interference (referred to as fixed interference), ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a combination that can suppress interference, broadband radio frequency interference, and frequency mixing in the working platform of the spaceborne receiver for the shortcomings of the existing technology and the limitations of high-quality devices that meet the requirements of the spaceborne Interference and other interference capabilities, with versatility, high stability, high reliability, broadband space-borne receiver anti-jamming system that can achieve high-sensitivity receiving function, aimed at solving the anti-jamming system of broadband receivers in the complex electromagnetic environment of space-borne The problem of weak interference ability

Images