“信息高速公路”是信息时代的产物。信息时代对通信提出了越来越高的要求,长途电话要自动拨号,而且迅速接通;打电话既要闻声,又见人;电子计算机数据既要传得多又要传得快;电视图像要比宽银幕电影还要清晰;……发展诸如此类的信息业务,单靠微波接力通信、同轴电缆通信等通信手段,其传输容量是远远不够的。怎样才能解决这些矛盾?“向更高的频率进军”不失为是一种良策。因为只有将传输频率提高,才能使工作频段更宽,通信容量更大。 毫米波的波长为10～1mm,它的对应频率很高, “Information Highway” is a product of the information age. The information age has put forward higher and higher requirements on communication. Long-distance calls need to be dialed automatically and promptly connected. It is necessary to hear both the voice and the human as well as the electronic computer data. Than the widescreen movie but also clear; ... ... Develop such information services, rely on microwave relay communications, coaxial cable communications and other means of communication, the transmission capacity is not enough. How can we solve these contradictions? It is a good policy to “march toward a higher frequency.” Because only the transmission frequency increase, in order to make the working frequency band wider, the communication capacity is bigger. The wavelength of millimeter wave is 10 ~ 1mm, its corresponding frequency is very high,