引言当今世界各种工程技术领域内,一方面无线电电子技术、电子计算机和微电脑使用日益广泛,灵敏度日益增高,很容易受到外来电磁干扰而误动作,另一方面大功率发射机、大功率电力设施也在飞快发展,它们工作过程中不可避免地要释放出各种电磁干扰信号,影响高灵敏度设备的工作。有些设备或系统本身既产生干扰信号又同时接收外来干扰信号,从而产生误 Introduction In today's world of various engineering and technical fields, on the one hand, the use of radio electronic technology, computer and microcomputer is becoming more and more widespread and their sensitivity is increasing day by day. They are easily exposed to external electromagnetic interference and malfunction. On the other hand, high-power transmitters, high-power power facilities Is also developing rapidly, they are inevitable to release a variety of electromagnetic interference signals, affecting the work of high sensitivity equipment. Some devices or systems themselves generate both interfering signals and simultaneously interfering signals, resulting in errors