混响室中漫射场对同轴电缆的耦合规律  

Coupling Laws of Diffuse Field on Coaxial Cable in Reverberation Chamber

作　　者：王庆国[1] 王树峤[1] 贾锐[1] 

机构地区：[1]军械工程学院电磁环境模拟国家重点实验室,石家庄050003

出　　处：《高电压技术》2014年第6期1630-1636,共7页High Voltage Engineering

基　　金：国家自然科学基金(51277180);国家重点实验室基金(9140C87020211JB34)~~

摘　　要：在模拟真实电磁环境的混响室中,电缆受到的是腔体内电磁场多次反射而形成的传播和极化方向随机的漫射场辐照。为此,利用仿真软件FEKO对漫射场条件下的场线耦合规律进行了建模与仿真研究,并提出了在混响室中使用网络分析仪和电光转换设备对同轴电缆耦合规律进行测试的方法。同时针对电缆终端负载以及加载物布局变化对混响室中电缆耦合规律的影响进行了分析。通过混响室中漫射场对同轴电缆耦合规律的测试发现:同轴电缆的耦合频点与单平面连续波对其辐照产生的激励耦合规律有较好的一致性,但不会受到电缆放置位置以及辐照方向的影响;同时同轴电缆终端负载以及加载物布局的变化虽然会对其终端耦合电流的大小产生影响,但不会干扰到其耦合频点。In a reverberation chamber that simulates real electromagnetic environment, a diffuse field with random transmission and polarization directions irradiates the cables inside. After modeling the reverberation chamber in FEKO, we calculated and obtained the coupling of the diffuse field on a coaxial cable. A method that adopted network analyzer and electro-optical conversion equipment to test the coaxial cable coupling was presented as well. Then we analyzed how the variation of the cable terminal load and loading layout impacted the cable coupling regularity. It is found that the coupling frequency point of coaxial cable is in accordance with the coupling rule of single plane wave irradiate on the cable, but it is not affected by the cable placement and irradiation direction. The variation of cable terminal load and loading layout impacts the magnitude of the induced current at the cable terminal, but it does not interfere with the coupling frequency point.

关 键 词：混响室 同轴电缆 漫射场 吸波材料 场线耦合 耦合规律 

分 类 号：TM248.3[一般工业技术—材料科学与工程]