双平板结构金属柱慢波系统的色散特性分析  

Analysis of dispersion properties for a periodic slow wave system with double flat metal column

作　　者：袁海军[1] 杨梓强[1] 史宗君[1] 

机构地区：[1]电子科技大学物理电子学院,四川成都610054

出　　处：《中国电子商情（通信市场）》2011年第6期175-180,共6页

摘　　要：对于由双平板金属柱结构构成的周期性慢波系统，本文采用CST仿真软件深入分析了该慢波系统的色散特性。研究了金属柱高度、沿传播方向周期长度、金属柱间隙对色散特性的影响，分析了三个周期长度基模中π模点的场图。结果表明，随着周期长度和金属柱间隙的变化，截止频率基本不发生变化；而随着金属柱高度的变化截止频率发生明显的变化，这与理论估算值基本一致。双平板金属柱慢波系统既有与传统光栅慢波系统相似的色散特性，又有独自的特点。For a periodic slow wave system with double flat metal column, the dispersion characteristics of the system are deeply analyzed by CST software. In this paper, the following parameters including a metal column height, period length along the propagation direction, metal column gap influence the dispersion characteristics. Electric field vector plot of π mode of three periods for base mode is given. The results show that with the change of cycle length and metal column gap, cut-off frequency does not change basically while with the change of the metal column height, cut-off frequency has apparent change. This is consistent with theoretical estimation. Periodic slow wave system with double flat metal column has dispersion characteristics similar to the traditional grating slow-wave system and has also its own characteristics.

关 键 词：双平板金属柱 慢波结构 CST仿真 色散特性 

分 类 号：TN814[电子电信—信息与通信工程]