孔隙结构金属板电磁屏蔽效能的实验研究

Study of the shielding effectiveness of the pore mental plate

探究机箱金属板表面孔隙特性对于电磁屏蔽效能的影响是解决不同电子系统之间电磁干扰问题的关键所在。本文依托HFSS电磁仿真软件,采用矩形波导测试方法,通过大量对比实验研究了含不同特性孔隙金属板的电磁泄漏情况,从而得出提高金属板电磁屏蔽效能的方法。实验结果显示,改变孔隙形状、缩小孔隙开口尺寸以及增大孔隙深度都可以有效地改善金属板电磁屏蔽特性,从而减小电磁干扰的危害。

To explore the influence of pores in the metal plates on electromagnetic shielding effectiveness is the key to solve the problem of electromagnetic interferences between different electronic systems. In this article, we simulated a large number of schemes based on the rectangular waveguide testing method by HFSS electromagnetic simulation software. We studied a large number of experiments to analyze electromagnetic leakage situation of different pore metal plates. It is concluded that how to improve the electromagnetic shielding effectiveness of the metal plates. The experimental results show that changing of pore shape, narrowing pore size and increasing porosity depth can effectively improve electromagnetic shielding properties of metal plates, so as to reduce the harm of electromagnetic interference.