圆形波纹槽波导终端的辐射特性研究

An Investigation of the Radiation from an Open-Ended Circular Corrugated Groove Guide

本文根据Floquet定理 ,考虑了圆形波纹槽波导内壁周期性结构而产生的空间谐波的影响 ,研究了这种波导终端的辐射特性。首先 ,利用Kirchhoff Huygens的积分公式 ,得到了这种波导终端辐射器中HE( 1)11模在远区的辐射场 ;然后 ,在一阶空间谐波近似的条件下 ,通过数值计算得到了该波导终端的辐射方向图 ;最后 ,给出了圆形波纹槽波导的各几何参数对其辐射特性的影响 ,得到了一些具有实际指导意义的结论。

By using the Floquet theorem and considering the influence of the space harmonics in the interior of a corrugated circular groove guide, the fields radiated by a HE (1) _ 11 mode of this guide are derived by a Kirchhoff-Huygens integration over the aperture field, and theoretical radiation patterns of the open-ended guide are also given. When parameters of the waveguide are varied, the influence on the radiation characteristics is also investigated.