Method for detecting micro-discharge of microwave component by utilizing intermodulation component

Abstract

A method for detecting micro-discharge of a microwave component by utilizing an intermodulation component is provided. The core of the method is characterized by utilizing a plurality of signals to be inputted to a system or component under test; according to the nonlinear characteristic of the micro-discharge, intermodulation signals between plurality of input signals are output; and micro-discharge phenomenon is detected according to the amplitude change of the intermodulation signals before and after the generation of the micro-discharge. The method mainly comprises the following steps: under single carrier and pulse operating conditions, selecting a continuous wave according with the rule as an auxiliary carrier wave for test; under the condition of multi-carrier waves, not needing to add auxiliary carrier wave; connecting a micro-discharge detection system according to the test principle block diagram; and the micro-discharge phenomenon is detected through observing the amplitude change of the intermodulation components between the plurality of signals. Compared with the conventional micro-discharge detection method, even if the two methods can both detect the micro-discharge phenomenon flexibly and reliably, the micro-discharge detection method in the invention is simpler in detection device and more novel in the concept of micro-discharge detection.

Description

technical field [0001] The patent of the present invention relates to a method for detecting micro-discharge of microwave components by using intermodulation components, which is applicable to the field of micro-discharge detection. Background technique [0002] In recent years, with the development of space technology, the power of microwave components is increasing, which greatly increases the possibility of micro-discharge in space microwave components. High-power microwave components in spacecraft payloads, such as output multiplexers, filters, switch matrices, antenna feeds, etc., are prone to micro-discharge effects due to their relatively low micro-discharge threshold due to their complex structures. Once the micro-discharge effect occurs, it will cause serious consequences: the noise level of the system will increase, and the output power will decrease; the standing wave ratio of the microwave transmission system will increase, and the reflected power will increase, ...

AI Technical Summary

Problems solved by technology

Although the existing detection methods, such as harmonic detection method, forward and backward power detection method and zero-adjustment detection method, can also be used to detect micro-discharge in the pulse working mode, the harmonic method brings more challenges to the detection equipment with the increase of the frequency band used. High requirements, the forward and backward power detection method is relatively sensitive to the device under test requiring a high quality factor device detection method, and the zero-adjustment detection method will cause misjudgment due to contamination and impurities

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