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将周期性慢波结构中的单元结构等效为一个三端口网络,利用高频结构模拟软件确定等效模型的参数,由此建立了一种通用的慢波结构等效模型.该方法不需要进行复杂的电路等效,直接由高频软件得到通道内场分布,因此较解析方法简单,又不像等效线路模型那么烦琐.基于该三端口网络模型,建立了适用于折叠波导行波管的一维注波互作用非线性理论模型,编写了数值计算程序,对一支折叠波导行波管进行了模拟.该理论模型模拟的结果与实验结果误差小于10%.该理论模型可以用于指导新型折叠波导行波管的设计及非线性模拟研究.
The periodic structure of the SW structure is equivalent to a three-port network, and the parameters of the equivalent model are determined by using the HF structure simulation software, thus a general equivalent model of the SW structure is established. This method does not require Therefore, compared with the equivalent circuit model, it is less cumbersome than the equivalent circuit model.Based on the three-port network model, a new method is proposed for the application of folded waveguide traveling wave tube , A numerical simulation program was written to simulate a folded waveguide TWT.The error between the simulation results and experimental results is less than 10% .The theoretical model can be used in Guiding the Design and Nonlinear Simulation of Novel Folded Waveguide Traveling Wave Tube.