微波晶体管种类繁多,结构各异,本文只评述其中几种重要的。硅双极微波晶体管在历史上曾经起过非常积极的作用,为开拓半导体微波应用,做过杰出的贡献。但是经过二十多年的发展,其性能已接近理论极限,研究活动不怎么活跃了,在众多对手的竞争下,已感到力不从心。当然,在 C 波段以下,还富有生命力,仍不失为最佳的微波器件之一。砷化镓微 There are many kinds of microwave transistors, different structures, this article reviews only a few of them. Silicon bipolar microwave transistors have played a very active role in history and have made outstanding contributions to the development of semiconductor microwave applications. However, after more than two decades of development, its performance has been close to the theoretical limit. Its research activities have not been very active. It has felt powerless under the competition of many rivals. Of course, below the C band, but also full of vitality, is still one of the best microwave devices. Gallium arsenide micro