遵照毛主席“洋为中用”、“知彼知己,百战不殆”的教导,现将各资本主义国家对微波低噪声晶体管的研究和生产情况,作一介绍,以供参考。众所周知,微波波段的信息容量比低频段、高频段都大得多,外界噪声对系统的影响也较小,天线和整机体积都可大大缩小。因此,国防尖端技术,如核弹、导弹、雷达、卫星、探测、通讯等所用的无线电系统越来越多地选在微波波段。因此,在这波段上对小型化低噪声接收机的要求越来越迫切。当前在接收机用的器件中,低噪声混频二极管和低噪声晶体管 In accordance with the teachings of Chairman Mao’s “foreign use”, “know each other’s friends and be confidently known”, we present the research and production of microwave low-noise transistors in various capitalist countries for reference. As we all know, the information capacity of the microwave band is much larger than that of the low frequency band and the high frequency band, the impact of external noise on the system is also small, and the antenna and the whole machine can be greatly reduced in size. Therefore, more and more radio systems used in advanced national defense technologies such as nuclear bombs, missiles, radars, satellites, detection and communications are selected in the microwave band. Therefore, the requirement of miniaturized low noise receiver in this band is more and more urgent. Currently in receiver devices, low-noise mixing diodes and low-noise transistors