Ka波段过模慢波结构色散曲线的数值求解 （高功率微波技术研究所专题组稿）

本文运用场匹配法，结合Ka波段过模慢波结构的实际情况，进行轴对称周期慢波结构色散关系的理论推导，得到了一种快速、准确计算适应Ka波段过模慢波结构的色散特性计算方法。根据推导结果，采用Matlab程序编程计算了Ka波段过模盘荷波导的色散曲线。将计算得到的色散曲线与成熟的商业软件计算得到的结果进行了对比，两者误差在2%以内，验证了数值算法的可靠性。计算得到的色散曲线可以辅助选取Ka波段微波源的结构参数，对器件设计有一定参考价值。

Numerical computation of dispersion curves in the Ka band overmoded slow wave structure

A numerical method is put forward by using field-matching in computing TM0n dispersive curves for axial symmetric Slow Wave Structures (SWSs). Considering the condition in the Ka-band overmoded SWSs, the method runs fast and correctly. Based on the deduction, the dispersion curves for a Ka band disk-loaded SWS are computed by programming Matlab codes. The program results have less than 2% deviations compared to the simulated results using mutual commercial electromagnetic software. These results are useful in the parameter selecting and designing for Ka band HPM devices.