在人类诞生之前,地球上就存在着电磁现象,只是从麦克斯韦建立电磁理论、赫兹发现电磁波的百余年来,电磁能才得到充分的利用。随着电子技术的的迅速发展,现代电子设备已广泛应用于人类生活的各个领域,给人类创造了巨大的物质财富。然而,各种电子设备在为人类造福的同时,也大大增加了周围环境中的电磁噪声。这些电磁噪声 Prior to the birth of mankind, electromagnetic phenomena existed on the earth. Only from Maxwell’s establishment of electromagnetic theory, Hertz discovered electromagnetic waves for more than a hundred years before electromagnetic energy was fully utilized. With the rapid development of electronic technology, modern electronic equipment has been widely used in all fields of human life, creating a huge material wealth for mankind. However, various kinds of electronic devices have benefited human beings as well as greatly increasing the electromagnetic noise in the surrounding environment. These electromagnetic noises