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星上采用行波管(TWT)作功率放大器,在过去一直以其突出的性能占据着绝对优势。然而在目前的先进卫星系统里,其产生微波功率的作用却面临着场效应晶体管(FET)固态功率放大器(SSPA)的严峻挑战。美国 RCA 公司实验室和航天电子部研制的固态功率放大器已经过“空间考验”,
The use of TWTs as power amplifiers in the satellite has dominated its outstanding performance in the past. However, in the current advanced satellite systems, the microwave power generation is facing the serious challenge of field-effect transistor (FET) solid-state power amplifier (SSPA). The solid-state power amplifier developed by RCA Laboratories and Aerospace Electronics Division of the United States has passed “space test”