Abstract: The electromagnetic coupling of a plane wave through a small aperture in conducting surface is used as the typical researching object，and then circle，square and rectangle are selected to build a model of aperture coupling of electromagnetic wave.Firstly，in terms of the Moment Method（MoM），the electromagnetic coupling through a small aperture on conducting surfaces is analyzed.The EM energy transmission coefficient through the aperture on conducting surfaces is calculated.Several coupling models are built to validate its effectiveness；the experimental results are shown in good agreement with each other.

Key words: Moment Method（MoM）, the coupling of aperture, Electromagnetic（EM） energy transmission coefficient

摘要： 以平板孔缝耦合为典型对象，选取圆形、正方形、长方形孔形，建立了无限大平板的小孔耦合模型，然后利用矩量法对孔缝耦合模型进行求解分析，得到了表征电磁耦合强弱的能量传输系数。为验证方法的有效性，搭建了实验系统对不同的孔缝类型进行了测试。结果表明，电磁波通过不同形状孔缝耦合过去的能量和孔缝的面积以及电磁波的入射角度有密切的关系。

关键词: 矩量法, 孔缝耦合, 电磁能量传输系数