周期慢波结构高频特性的仿真研究

Simulation of High-frequency Characterisdtics of Periodic Slow-wave Structure

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. Compa- ring the result of theory with the result of numerical simulation, two results are identical. The rsimulation result indi- cates that the harmonic frequency increases with the radius, and decreases with periodi of slow - wave structure.