含长贯通导线腔体电磁耦合数值分析与实验研究  

Numerical simulation and experiment research on irradiation coupling of electromagnetic to metal enclosure with long penetrative wire

作　　者：李新峰[1] 魏光辉[1] 潘晓东[1] 范丽思[1] 李凯[1] 

机构地区：[1]军械工程学院静电与电磁防护研究所,河北石家庄050003

出　　处：《电波科学学报》2014年第6期1189-1195,共7页Chinese Journal of Radio Science

基　　金：国家安全重大基础研究计划(973计划)(No.613138);武器预研项目(51333040103);国家自然科学基金(No.61372040)

摘　　要：基于时域有限积分方法建立了含长贯通导线金属腔体电磁耦合数值模型,分析了平面波辐射下贯通导线长度、电场极化等参数对腔体屏蔽效能的影响;提出了基于吉赫横电磁波传输室搭建实验平台的新方法,对数值结果进行了验证;建立了耦合等效电路,并分析了耦合机理.研究表明:贯通导线对电磁波耦合作用显著,腔内屏蔽效能下降约30dB;贯通导线有频率选择特性,当其电长度ξ约为1/2的整数倍时谐振;外部导线长度对腔体谐振频率及屏蔽效能无影响;内部导线长度及腔体壁厚度主要影响腔体谐振频率;距贯通导线越远,屏蔽效能值越大;贯通导线方向上电场分量增大,屏蔽效能变差.The electromagnetic coupling model of enclosure with long penetrative wire was set up by finite integral time domain method. By changing the parameter value, the coupling law was analyzed. A new experimental plat based on gigahertz transverse elec- tromagnetic cell （GTEM cell） was developed and the numerical results were approved. An equivalent circuit was built to analyze the coupling mechanism. The results indicate that the shielding effective （SE） of enclosure with aperture descends 30 dB averagely when a wire penetrates the aperture. The penetrative wire response has frequency selec- ting characteristic, when the wire relative length equals to semi-integer, the wire reso- nance. SE has no change with the length of external wire increases. The resonance fre-quency of wire is affected by the length of internal wire and thickness of enclosure. The SE of enclosure increases when the distance of test point to penetrative wire is further. The parallel electric field value is bigger, the SE is worse.

关 键 词：贯通导线 开孔腔体 不同参数 吉赫横电磁波传输室 耦合规律 

分 类 号：TM15[电气工程—电工理论与新技术] TM564