一种改善机箱屏蔽效能的金属屏蔽网的分析  

Analysis for a Metal Screen to Improve the Shielding Effectiveness of Computer Case

作　　者：唐涛[1] 夏运强[1] 宋开军[2] 

机构地区：[1]成都信息工程学院电子工程学院,四川成都610225 [2]电子科技大学电子工程学院,四川成都610054

出　　处：《成都信息工程学院学报》2012年第5期443-448,共6页Journal of Chengdu University of Information Technology

基　　金：国家自然科学基金委员会-中国工程物理研究院联合基金资助项目(10976005);成都信息工程学院科研基金(KYTZ201211)对本文的资助

摘　　要：为了保护暴露于强电磁环境中的机箱,为机箱加装附加金属屏蔽网是一种简单有效的方法。通过对强电磁脉冲与典型电脑机箱面板上孔缝的耦合特性的分析,获得机箱的屏蔽效能与机箱面板上孔缝尺寸间的关系。在此基础上对一种附加的封闭金属屏蔽网在改善计算机机箱对强电磁脉冲屏蔽效能做了研究,并且对封闭屏蔽网结构进行了简化改进。通过对机箱屏蔽效能的实际测试,验证了金属屏蔽网对提高机箱屏蔽效能的实际效果。Design additional metal screen is a simple and effective way to protect the typical computer case which ex- posed to strong electromagnetic environment. The relationship between shielding effectiveness and？ the geometric di- mensions of the aperture on the case can be got by analyzing the coupling characteristics between strong electromag- netic pulse and the aperture on case panel. Based on these discussions, a closed metal screen in improving the shield- ing effectiveness of the computer case which exposed to strong electromagnetic pulse environmente has been proposed, and a simplified structure of the metal screen has been analyzed. The practical effect in improving the shielding effec- tiveness of proposed metal screen has been verified by shielding effectiveness testing.

关 键 词：电磁兼容 屏蔽效能 金属屏蔽网 孔缝耦合 

分 类 号：TM937.1[电气工程—电力电子与电力传动]