电磁辐射发射现场测试中基于空域对消的背景电磁干扰抑制方法

doi:10.3969/j.issn.1001-506X.2020.07.01

Abstract

Abstract:

In the on-site test of electromagnetic compatibility, it is one of the difficult problems that need to be solved urgently, accurately extracting the electromagnetic radiation signal of the equipment under test from the environmental electromagnetic signals. Based on the principle of spatial cancellation, a new type of time domain measurement and reception system is used. In the absence of prior information such as the number and orientation distribution of environmental electromagnetic interference sources, the method can still create a virtual microwave anechoic chamber environment, so as to filter the on-site environmental electromagnetic interference and obtain the real radiation characteristics of the equipment under test. Simulation and test results show that the method can not only suppress the narrow-band and broadband steady-state interference, but also has a good effect on transient interference. In addition, the multipath interference can be effectively suppressed, which brings better operability and convenience for electromagnetic compatibility on-site test.

Key words: electromagnetic compatibility (EMC), radiation emission, on-site test, electromagnetic interferences (EMI)

CLC Number:

TN03

Zhonghao LU, Jun XU, Mingtuan LIN. Background electromagnetic interference suppression method based on spatial cancellation for on-site test of electromagnetic radiation emission[J]. Systems Engineering and Electronics, 2020, 42(7): 1433-1438.

Figures/Tables 9

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Background electromagnetic interference suppression method based on spatial cancellation for on-site test of electromagnetic radiation emission

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