ABSTRACT An efficient analytical method has been proposed for predicting the shielding effectiveness (SE) and resonances of a metallic enclosure with multiple apertures against an external incident plane wave. First, the electromagnetic (EM) field distribution within the enclosure through multiple apertures is represented by the equivalent electric and magnetic dipole moments based on the Bethe’s theory for small aperture coupling. Then, the EM fields in the enclosure can be obtained by using the scalar wave functions, where the unknown coefficients in the functions are related to the equivalent dipole moments. Finally, the analytical method is applied to handle the enclosure with multiple apertures, and corresponding inclusions about the SE and resonances can be obtained. Compared with the full-wave simulation software CST over the frequency range of 0–2.5 GHz, the analytical method is proved to be accurate and effective, which consumes less time than the conventional numerical methods.

中文翻译：

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一种预测多孔外壳屏蔽效果的有效方法

摘要 已经提出了一种有效的分析方法来预测具有多个孔径的金属外壳对外部入射平面波的屏蔽效率 (SE) 和共振。首先，外壳内通过多个孔径的电磁 (EM) 场分布由基于 Bethe 小孔径耦合理论的等效电偶极矩和磁偶极矩表示。然后，可以通过使用标量波函数获得外壳中的电磁场，其中函数中的未知系数与等效偶极矩相关。最后，应用解析方法处理多孔箱体，得到相应的SE和共振夹杂。