基于交错双栅结构的混合电路模型

A hybrid circuit model based on staggered double-vane structure

带状注行波管作为一种发展中的新型器件在雷达和通信领域有广泛应用前景。相比于圆形注器件,目前针对带状注行波管的注波互作用模型仍较少。本文针对交错双栅这一常用的带状注慢波结构,从电路理论出发,研究了由分布式的传输线元件和集总电路原件构成的混合电路模型在刻画高频率慢波结构上的适用性,重点解决了从慢波结构几何参数到电路物理参数的映射问题。建立交错双栅混合电路模型,推导了色散方程,同时基于模拟退火算法实现了高精确度参数拟合。结果表明,混合电路模型能够精确刻画交错双栅的色散特性。该模型对后续开发基于混合电路模型的带状注大信号注波互作用程序具有重要意义。

As a novel developing vacuum electronic device,sheet beam traveling wave tube has a wide range of application prospects in the field of radar and communications.Compared to cylindrical beam devices,there are still fewer beam-wave interaction models for sheet beam traveling wave tubes.Based on the electric circuit principles,a hybrid circuit model consisting of distributed transmission line components and lumped elements for a commonly used sheet beam slow wave structure(SWS)—staggered double vane is developed,and the feasibility of applying the model to high frequency SWS is validated.The problem of mapping from the geometrical parameters of SWS to the physical parameters of hybrid circuit is focused on.The hybrid circuit model of staggered double-vane is developed,and its dispersion relation is analyzed.Besides,a model-based Simulated Annealing(SA)algorithm procedure,capable of achieving high precision parameter fitting is coded.The results show that the proposed hybrid circuit model can accurately reproduce the dispersion characteristics of the staggered double-vane.It is significant for the subsequent development of a large signal sheet beam-wave interaction procedure based on the hybrid circuit model.