Method for Shielding Effectiveness of Enclosure with Apertures Including High-order Mode

GAO Xuelian; MA Shijie; YANG Kai; LI Dan

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Method for Shielding Effectiveness of Enclosure with Apertures Including High-order Mode

更新时间：2025-12-08

- Method for Shielding Effectiveness of Enclosure with Apertures Including High-order Mode
- Vol. 43, Issue 10, Pages: 3344-3350(2017)
- 作者机构：
  
  华北电力大学电气与电子工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：30 October 2017，
  
  Published：2017
- 稿件说明：
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GAO Xuelian, MA Shijie, YANG Kai, et al. Method for Shielding Effectiveness of Enclosure with Apertures Including High-order Mode[J]. 2017, 43(10): 3344-3350.
DOI：

GAO Xuelian, MA Shijie, YANG Kai, et al. Method for Shielding Effectiveness of Enclosure with Apertures Including High-order Mode[J]. 2017, 43(10): 3344-3350. DOI：

摘要

针对现有孔缝腔体分析方法精度较差的缺点

在模式匹配法基础上

提出一种基于电磁拓扑理论的孔缝腔体屏蔽效能（SE）混合计算方法;该算法能快速准确地计算任意入射、任意极化平面波照射腔体以及任意位置开孔、双面开孔腔体的屏蔽效能。根据模式匹配法将腔体孔缝等效为不连续波导边界

通过求解耦合系数得到孔缝散射矩阵;然后采用电磁拓扑的方法分析孔缝腔体

绘制出物理模型的电磁拓扑信号流图

得到传播关系方程和散射关系方程;最后可获得腔体内任意点处的电压值

从而得到孔缝腔体内部屏蔽效能。通过将理论计算结果与CST仿真结果进行对比

验证了该混合方法在0

GHz范围内的计算结果明显优于Robinson等效电路法

且比CST占用的时间短、资源少。

Abstract

The existing analysis method of the seam hole cavity has poor precision

thus we propose a hybrid method for computing the shielding effectiveness（SE） of a cavity with apertures more accurately

based on the mode matching method and the electromagnetic topology theory.The proposed method can quickly and accurately calculate the SE with arbitrary incident and polarized plane wave

and the SE of a cavity with single or double apertures at arbitrary position.According to the pattern matching method

the cavity aperture is equivalent to the discontinuous waveguide boundary

and the scattering matrix of the hole is obtained by solving the coupling coefficient.Then the cavity with aperture will be analyzed by a method of electromagnetic topology

and a propagation relation equation and a scattering relation equation are obtained.At last

the voltage value at a

ny point in the cavity can be obtained

and the shielding effectiveness of the cavity is obtained.By comparing the theoretical results with the CST simulation results

it is shown that the hybrid method is superior to the Robinson equivalent circuit method and has advantages over the CST in running time and memory resource in the range of 0

GHz.

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