带缝隙腔体电磁屏蔽特性的数值模拟研究

被引：10

作者：

吴贤

杜平安

聂宝林

毛湘宇

机构：

[1] 电子科技大学机械电子工程学院

来源：

工程设计学报 | 2011年 / 18卷 / 03期

关键词：

缝隙; 传输线矩阵法; 平面波; 电磁屏蔽特性; 屏蔽效能; 谐振点;

D O I：

暂无

中图分类号：

TN03 [结构];

学科分类号：

080904 ;

摘要：

电子设备因散热需要,其腔体表面会存在大量孔缝,而孔缝又是造成电磁泄露的重要途径,其中更以缝隙的影响最为严重.由此,以带缝隙的金属矩形腔体为对象,应用时域传输线矩阵法(transmission-line matrix method,TLM),研究了平面波的极化方式及入射角,缝隙的长度、数量、位置、间距及方位等对腔体屏蔽特性的影响,得到了影响腔体屏蔽特性的主要因素.其中,平面波的极化方式、缝隙的长度和方位会对腔体的屏蔽效能和谐振点产生显著的影响,在屏蔽设计中,应尽量避免干扰源的电场方向与缝隙长边垂直及缝隙过长.

引用

页码：197 / 203

页数：7

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