They are widely used in airspace, missilery, microwave communication and various kinds of apparatuses.
被广泛应用于宇航、导弹、微波通讯及各种精密电子仪器设备中。
英语百科
Microwave transmission
Microwave transmission is the transmission of information or energy by electromagnetic waves whose wavelengths are measured in small numbers of centimetre; these are called microwaves. This part of the radio spectrum ranges across frequencies of roughly 1.0gigahertz (GHz) to 300GHz. These correspond to wavelengths from 30centimeters down to 0.1cm.