Tunable anti-interference pulse self-check detection circuit

Abstract

The invention discloses a tunable anti-interference pulse self-check detection circuit which comprises a coupling circuit, a detector diode, a filter capacitor, a load resistor, a blocking capacitor, a grounding resistor and an operational amplifier comparator. The coupling circuit is used for extracting the sent self-checking pulse signal; the detector diode, the filter capacitor and the load resistor form a charging and discharging loop used for converting the radio frequency signal into a voltage analog signal; the blocking capacitor, the grounding resistor and the operational amplifier form a filter circuit which is used for filtering a direct current level formed by a continuous wave interference signal at the front end of the blocking capacitor and only detecting and amplifying a coupled input pulse radio frequency signal, and the pulse width and amplitude of the pulse signal change along with the adjustable resistor; according to the invention, self-checking pulse signals with different pulse widths and different amplitudes can be detected, so that external clutter interference, other interference and the like can be resisted.

Description

technical field [0001] The invention relates to the field of microwave technology, and more specifically, to a tuneable anti-interference pulse self-detection and wave detection circuit. Background technique [0002] The self-inspection detection circuit plays an important role in the electronic countermeasure system. It can monitor whether the transmitted interference signal is valid, so as to judge whether the transmission link is working normally. When the signal is transmitted, a certain amount of signal energy is coupled from the transmitting output terminal into the self-inspection circuit. The traditional detection circuit performs continuous wave detection, and all the signals entering the self-inspection circuit are detected and output. When a wave signal is used (usually a continuous wave signal), the system cannot effectively judge the correctness of the self-test output level, and the self-test function fails. Therefore, a self-test circuit capable of anti-jammi...

AI Technical Summary

Problems solved by technology

The self-test signal that this kind of detection circuit can detect is limited, and the pulse width and amplitude are basically determined. When the interference signal generated by the other party is synchronized with the self-test signal, the self-test detection circuit may fail.

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