摘要
本文应用有限元－边界积分法研究有限壁厚矩形波导窄边斜缝导纳特性。该方法首先用等效源原理及镜像原理建立缝隙表面磁场积分方程，然后把它们代入到缝腔中场满足的变分公式中，最后用有限元法求得缝腔中及口面上的电场分布．进一步求解把缝等效为传输线上对称T型网络时缝并联导纳与缝倾斜角度及切割深度的关系。同时，观察了波导壁厚度及缝宽对谐振频率的影响。计算数据与最新发表的实验数据比较，结果基本一致。
In this paper, the admittance characteristics of edge slots considering the finite thickness of waveguide wall are studied by finite element-boundary integral method. The magnetic integral equations on inner and outer slot surface are derived through equivalence principle and image theorem. By virtue of the finite element method, the variational equation for the electric field in the slot region is solved, and the relation between the tilt and cut depth to the admittance of slot is obtained. Furthermore the influence of the thickness and width on the resonant frequency is found. The computed results are in good agreement with the published experimental ones.
出处
《微波学报》
CSCD
北大核心
1998年第1期9-16,共8页
Journal of Microwaves
基金
自然科学基金
关键词
有限元-边界积分法
边缝
并矢格林函数
散射系数
矩形波导
Finite element-boundary integral method, Edge slot (inclined slot), Dyadic Green' s function, Scattering coefficient
