周期慢波结构高频特性的仿真研究

摘要

由于理论方法数值计算量大以及与实际复杂结构差别大,同时实验测试方法误差大、且高次模难激励.针对这些算法的缺点,采用理论和数值模拟结合方法从而克服上述方法不足,仿真研究了圆柱载膜波导慢波结构的色散特性,其结果和理论计算结果模拟比较,二者吻合.研究表明圆柱载膜波导慢波结构的谐振频率(同一模式下)与载膜半径成正比、与周期成反比;同时表明上述方法计算简单,省去了繁琐的求解方程过程.最后给出各个模式电场分布,对研究分析束波互作用提供依据.%The peper analyses dispersion characteristic of column wave -guide with a slow- wave ,because there are differences between the experiment and theoretical methods. In this paper, the theory is combined with numerical simulation to study the High - frqueency dispersion characteristic of column wave - guide with a slow wave. Comparing the result of theory with the result of numerical simulation, two results are identical. The rsimulation result indicates that the harmonic frequency increases with the radius, and decreases with periodi of slow - wave structure.