Agile ultrashort wave numerical control tracking tuning amplifying circuit with high anti-interference

Abstract

The invention relates to an agile ultrashort wave numerical control tracking tuning amplifying circuit with high anti-interference, and the amplifying circuit provided by the invention mainly comprises a front-end protective circuit, a sectional electric tuning concentrated selection narrow-band tracking filter, a gain control low-noise amplifier, a sectional electric tuning tracking filter, an electric tuning digital-analog converter, a gain control digital-analog converter, a data memory and a controller, wherein after the tracking frequency selection is carried out via the front-end protective circuit by the sectional electric tuning concentrated selection narrow-band tracking filter, an ultrashort wave radio signal received by an antenna is amplified by the gain control low-noise amplifier and is output after being subjected to frequency selection by the sectional electric tuning tracking filter; the data after tracking filtering and gain control is stored in the data memory and is converted into a voltage control value by the gain control digital-analog converter; and the waveband conversion, the tracking tuning and the amplitude equalization are carried out by the controller. According to the amplifying circuit provided by the invention, the capability of an ultrashort wave radio receiver for dealing with a complicated electromagnetic environment can be reinforced, and the amplifying circuit is suitable for a frequency hopping receiver and enables the frequency hopping receiver to have the characteristic of anti-interference.

Description

technical field [0001] The invention belongs to the technical field of ultrashort wave radio communication, and specifically relates to a The design of the RF front-end circuit of the ultrashort wave receiver in the range, especially to improve the The anti-electronic interference and anti-blocking performance of ultrashort wave receivers within the scope can be applied to the design and manufacture of ultrashort wave radio receivers, and can also be placed at the input end of the existing radio frequency front-end circuit of ultrashort wave receivers to improve existing ultrashort wave radio reception. The anti-blocking performance of the machine. Background technique [0002] The electromagnetic environment of modern radio communication is becoming more and more complex, the ultra-short wave radio communication equipment has increased a lot, and the signal has become more and more concentrated. For example, in marine communication, sometimes on a narrow plane, multiple...

AI Technical Summary

Problems solved by technology

[0003] Many early productions are still in use today Ultrashort wave radio communication equipment within the range, the comprehensive index of the RF front-end circuit, especially the performance of anti-strong interference is poor, and in the design of ultrashort wave radio communication equipment, designers often focus on digital intelligent functions, and often ignore the analog RF front-end High index circuit design of circuit

According to the problem of poor anti-blocking interference performance of some radio communication equipment, some new methods have also been proposed and used, such as phase cancellation method, tracking attenuation method, etc., but they cannot adapt to the rapid change of parameters when the radio receiver is used

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