自从麦克斯威尔发明电磁理论，赫兹发现电磁波以来，电机的诞生，电磁能的广泛应用，使工业技术的创新日新月异，电报电话的出现．使世界的二巨离大大缩短。电磁能为人类创造巨大财富的同时，电磁干扰也引起了重视和研究，一些工业国家，例如德国、美国、日本等开始研究、制定 Since Maxwell invented electromagnetic theory and Hertz discovered electromagnetic waves, the birth of electric machines and the widespread application of electromagnetic energy have brought about the rapid development of industrial technology and the emergence of telegraph and telephone. So that the two world giant greatly reduced. While electromagnetic energy has created huge wealth for mankind, electromagnetic interference has also drawn great attention and research. Some industrial countries, such as Germany, the United States and Japan, have started to study and formulate