电子设备机壳电磁屏蔽技术研究

Research on Electromagnetic Shielding Technology of Electronic Enclosures

文章阐述了谱域分析方法计算屏蔽效能的原理,针对电子设备机壳上的周期结构矩形孔阵,应用谱域法对其屏蔽性能进行了分析和计算。在此基础上利用谱域法和FDTD法对矩形孔周期结构导电板进行了比对分析和计算,并用试验方法进行了测试,计算结果与FDTD法计算结果基本一致,也与测试结果比较吻合。

The calculation approach of shielding effectiveness by spectral-domain analysis is introduced in this paper. Focusing on the periodic structure of aperture arrays with rectangular shape, shielding effectiveness is analyzed and calculated by the spectral-domain method. And the simulated analysis and computation of a periodic structure of aperture arrays with rectangular shape in a conducting fiat screen are compared by spectral-domain method, FDTD and testing. As the theoretical analysis and simulation results shown, the shielding effectiveness of aperture arrays is a very good agreement between simulated and measurement results.