采用基于RWG基函数的电场积分方程进行屏蔽效能计算  

Shielding Effectiveness Calculation by EFIE Based on RWG Base-function

作　　者：高璞[1] 郝建红[1] 

机构地区：[1]华北电力大学电气与电子工程学院,北京102206

出　　处：《现代电力》2011年第1期45-47,共3页Modern Electric Power

基　　金：科技部国际科技合作计划项目(2007DFA71250)

摘　　要：从一个开口矩形箱体的模型出发,计算在平面波辐照下从外界耦合到腔体中心的电磁能量。首先根据理想导体表面的边界条件,推导出三维空间散射电磁场的电场积分方程,然后将箱体的表面感应电流使用RWG基函数展开并应用伽略金法进行检验,最后使用矩量法求解表面电流的展开系数得到整个箱体表面的感应电流分布。采用EFIE和FE-KO软件分别计算机箱在单孔、多孔以及圆形孔等不同条件下的屏蔽效能,结果基本一致,并且得知面积相同时,孔洞越多,屏蔽效能越好,且圆形孔比矩形孔屏蔽效能要好。An opening rectangular box model is proposed to calculate electromagnetic energy coupled to the center of model under the plane wave irradiation from outside.First of all,according to the ideal conductor surface boundary conditions,electric field integral equation（EFIE） of the scattering field in three-dimensional space is deduced.Then the surface induction current can be expanded by using of RWG base function,which is verified by galerkin method.In the end,spread coefficient of surface current can solved by moment method to obtain induced current distribution on surface of whole box.By using of EFIE and FEKO,the shielding effectiveness under different conditions,such as the single hole,the multiple holes and the round hole,is calculated.The results show that more holes will make better shielding effectiveness under constraint condition of same area,and the shielding effectiveness of round hole is better than that of rectangle hole.

关 键 词：电场积分方程 矩量法 孔缝 屏蔽效能 RWG基函数 

分 类 号：TM153.5[电气工程—电工理论与新技术]