贯通导线端接负载对腔体电磁耦合影响分析  

Influence of penetrative wire terminal load on cavity electromagnetic irradiation coupling

作　　者：李新峰[1] 魏光辉[1] 潘晓东[1] 李凯[1] 孙肖宁[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》2015年第3期590-596,共7页Chinese Journal of Radio Science

基　　金：国防973项目(6131380301);武器预研项目(51333030101);国家自然科学基金(61372040)

摘　　要：为研究贯通导线端接负载对金属腔体电磁耦合的影响,基于时域有限积分方法建立了平面波辐射条件下含贯通导线金属腔体的耦合计算模型,通过腔内屏蔽效能变化研究了端接负载及连接方式等对腔内电磁耦合的影响,分析了耦合机理,提出了基于吉赫横电磁波传输室建立含贯通导线腔体电磁耦合实验的新方法,对计算结果进行了实验验证.研究表明:腔内贯通导线负载为纯电阻及容性阻抗时,负载接腔体或腔体接地能降低腔内的电磁耦合,且电阻值及电容值大小对腔内耦合有显著影响;电阻及加载电容后发现,负载开路且腔体不接地时,腔体的低频电磁耦合效果基本不变,负载短路且腔体接地时,负载变化对腔内高频耦合影响不大.负载连接腔体对腔内电磁耦合的谐振频率有一定影响.In order to study the influence of penetrative wire terminal load to cavity electromagnetic coupling,a model of cavity with penetrative wire and load was set up by finite integration time domain method(GTEM).By changing the terminal load and connection style,the coupling law of enclosure was analyzed through SE parameter;a new experimental system based on GTEM chamber was developed,the numerical results were approved well.The results indicate that when the terminal load is resistance or capacitive,the coupling of cavity is descended with the load connected to cavity or cavity connected to ground,the coupling effect is obviously influenced by the value of resistance or capacitive load.Comparing resistance load with capacitive load,the SE of cavity has no change at low frequency when the load is not connected to ground and open,the same situation appears at high frequency when the load connected to ground and short.The resonance frequency is influenced by the load connecting to cavity.

关 键 词：贯通导线 金属腔体 端接负载 吉赫横电磁波传输室 屏蔽效能 

分 类 号：TN03[电子电信—物理电子学]