虽然速调管问世已近四十年了,但是直到最近才有可能对其特性通过各种途径作重大改进。本文叙述用在粒子加速器、工业加热和可动式发射机中的管子的转换效率的改进;用在通讯系统中的宽带速调管;机载或便于应用的轻重量磁聚焦系统;机载雷达中脉冲速调管使用的栅控枪. Although klystrons have been around for almost 40 years, it has not been possible until recently to make significant improvements to their identity through various means. This article describes the improvements in conversion efficiency of tubes used in particle accelerators, industrial heating and mobile transmitters; broadband klystrons used in communications systems; light weight magnetic focusing systems for on-board or user-friendly applications; airborne radars Gated gun used in pulsating klystron.