In this paper a new kind of TWT is introduced and its working principles are analyzed.Structure of the TWT with slow wave system and its dispersion characteristics are analyzed.

• 介绍了一种新型的行波管并分析了其作用机理，分析了这种新型行波管慢波系统的结构及其色散特性，讨论了T形齿结构和梯形齿结构慢波系统几何尺寸对工作性能的影响。