自从麦克斯维尔发明电磁理论,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,使世界的距离大大缩短。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、 Since Maxwell invented the theory of electromagnetism, the discovery of electromagnetism by Hertz has brought about the birth of electric machines and the extensive application of electromagnetic energy, resulting in the rapid development of industrial technology. The emergence of telegraph and telephone has greatly shortened the world’s distance. Electromagnetic energy creates huge wealth for mankind at the same time, electromagnetic interference has also attracted the attention and research. Some industrial countries, such as Germany,