一种宽带速调管中高次模式振荡的抑制

Suppression of High Order Mode Oscillation in a Broadband Klystron

该文描述了在一种S波段宽带速调管研制过程中出现的高次模式振荡现象,分析了抑制这种振荡的可能方式,提出了一种抑制这种振荡的方法。该方法通过改变谐振腔结构,在基本不影响基模频率的前提下,使高次模式频率产生较大的改变,从而使该高次模式的振荡得到抑制。利用Ansoft HFSS模拟设计软件,对谐振腔进行了改进设计并完成了相应的实验验证。利用改进设计的谐振腔,进行了速调管整管试验,有效地抑制了速调管中高次模式的振荡。

The phenomena of a high order mode oscillation in a broadband klystron are described in this paper.Some methods are discussed for suppressing parasitical mode oscillation in klystron resonant cavity.One new method is used to eliminate the oscillation in the broadband klystron.The method can make the high order mode frequency change enormously but the fundamental mode frequency alter faintly through adjust the structure of a resonant cavity,thereby the high order mode oscillation is suppressed.An improved design for resonant cavity with Ansoft HFSS code and corresponding experimental approval has been performed.The testing result of the klystron with the improved resonant cavity shows that the high order mode oscillation can effectively be suppressed.