现代电子技术2012，Vol.35Issue(13)：155-158,4.
机箱孔缝对电磁屏蔽效能的影响研究
Influence of enclosure holes or slots on electromagnetic shielding effectiveness
摘要
Abstract
More recently, with the rapid development of power electronics and electrical automation technology, the electromagnetic environment has become more complex and the interference between electronic equipments has been increasingly serious. Electromagnetic compatibility (EMC) has become an important issue that can not be ignored. Metallic enclosure is widely used to shield from electro-magnetic interference (EMI). Because of the needs for such various reasons as heat dissipation and ventilation panels, etc. , the holes or slots inevitahly exist on the enclosure. The holes or slots are the main factors to influence the effectiveness of the system, through which EMI signal is transmitted into the enclosure. Waveguide equivalent circuit model is used to calculate the shielding effectiveness of rectangular enclosure with center hole, and the impact of such hole parameters as the shape, the ratio of length to the width for the rectangular slots, the polarization of incident electromagnetic wave, etc. are discussed in this paper. ,In addition, the rectangular metallic enclosure with hole arrays is further studied. The improvements for EMC design of enclosure are put forward. Finally, the efficiency of the model and accuracy of algorithms are tested and verified by Ansoft HFSS simulation software.关键词
电磁兼容/传输线理论/屏蔽效能/HFSSKey words
electromagnetic compatibility (EMC)/ transmission line theory/ shielding effectiveness/ HFSS分类
信息技术与安全科学引用本文复制引用
孟培雯,刘云飞,顾敏明..机箱孔缝对电磁屏蔽效能的影响研究[J].现代电子技术,2012,35(13):155-158,4.基金项目
国家自然科学基金(31170668) （31170668）
