本文先简单地介绍了反射速调管的优点、用途、分类和特点,然后介绍资本主义国家的反射速调管在目前的进展情况,着重在毫米波、宽频带及新型的反射速调管,对这些管子均列出表格并分析比较它们的优缺点。此外,还谈到了反射速调管在设计和工艺方面的进展。最后提出了尚待解决的问题。 This paper briefly introduces the advantages, uses, classification and characteristics of the reflection klystron, then introduces the current progress of the reflection klystron in the capitalist countries, focusing on millimeter wave, broadband and a new type of reflection klystron, The tubes are tabulated and their strengths and weaknesses are analyzed and compared. In addition, talked about the design of the retro-klystron and the progress of the process. Finally, there are some outstanding problems.