一种超宽带双信道速调管输出回路的设计和实验

Design and Experiment of a Super-wide Band Output Circuit with Two Channels for Klystron Applications

该文介绍了一种超宽带双信道速调管输出回路的设计思路和实现过程。以Ansoft HFSS软件为设计平台,在S波段设计出一个带宽超过550 MHz的超宽带双信道双间隙耦合腔输出回路。设计了信道转换机构,并分别确定了两个信道的谐振腔参数。得出了不改变两个谐振腔参数,只需调节耦合槽的尺寸就能够实现信道转换的结论。通过对HFSS软件建立的模型进行计算,得到了双间隙耦合腔输出回路中各模式的频率,与冷测结果基本一致。利用集中元件等效电路法计算了双间隙耦合腔输出回路的间隙阻抗,计算结果与冷测结果基本一致。

The design ideas and performance process of a super-wide band and two channels output circuit on a klystron are presented. A super-wide band two-channel double-gap coupled-cavity output circuit, whose bandwidth is over 550 MHz, is designed at S band by Ansoft HFSS. A channel switch structure is designed, and the resonance parameters of the two channels are determined. Then, a conclusion is made that channels can be switched easily through tuning the coupled-slot without changing the parameters of the two cavities. The frequencies of each mode in the double-gap coupled-cavity output circuit are simulated through calculating the model by Ansoft HFSS. The frequencies of each mode accord with the “cold test” mainly. The gap impedance of double-gap coupled-cavity, which is simulated by analysis of equivalent lumped element circuit, also accords with the“cold test”very well.