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根据空间电荷波理论,利用微波等效传输线的概念,建立了多间隙耦合腔中注波互作用的小信号计算模型。同时,还基于电子圆盘模型,建立了相应的一维大信号计算模型。依据模型编写了计算机程序进行了计算模拟,结果显示,小信号模型能较好地反映整管的增益频率特性。一维大信号模型能合理地模拟注波互作用的基本物理过程。另外利用电路反馈的理论,分析了多间隙耦合腔的稳定性,并利用奈奎斯特稳定判据给出了耦合腔稳定条件。
According to the theory of space charge wave and using the concept of microwave equivalent transmission line, a small signal calculation model for the interaction of multiple waves in a cavity is established. At the same time, based on the electronic disc model, a corresponding one-dimensional large signal computing model was established. According to the model, a computer program was compiled and calculated. The results show that the small signal model can better reflect the gain frequency characteristics of the whole pipe. The one-dimensional large-signal model can reasonably simulate the basic physics of the wave-wave interaction. In addition, the stability of multi-gap coupling cavity is analyzed by the theory of circuit feedback. The stability condition of the coupling cavity is given by the Nyquist criterion.