电缆样本耦合长度对转移阻抗测试结果的影响  

Influence of Coupling Length of Cable Sample on Measurement Results of Transfer Impedance

作　　者：孙蓓云 秦锋[1,2] 聂鑫 SUN Bei-yun;QIN Feng;NIE Xin(State Key Laboratory of Intense Pulse Radiation Simulation and Effect,Xi’an 710024,China;Northwest Institute of Nuclear Technology,Xi’an 710024,China)

机构地区：[1]强脉冲辐射模拟与效应国家重点实验室,西安710024 [2]西北核技术研究所,西安710024

出　　处：《现代应用物理》2021年第4期39-43,共5页Modern Applied Physics

基　　金：国家军用标准研究资助项目(062131701);强脉冲辐射环境模拟与效应国家重点实验室专项经费资助项目(SKLIPR1803Z)。

摘　　要：给出了用于屏蔽电缆转移阻抗测试的三同轴法的频率响应系数解析公式,计算了IEC 62153-4-3:2013标准中方法C的频率响应,分析了不同测试结构及同种测试结构不同耦合长度电缆样本的频率响应及其对转移阻抗测试结果的影响,并实测了SYV-50-3-4同轴电缆的转移阻抗,验证了分析结果的正确性。结果表明:缩短电缆样本的耦合长度,不仅提高了转移阻抗的可测试上限频率,还提高了测试结果的准确性。The analytical formula of frequency response factor of triaxial method for transfer impedance measurement of shielded cable is given,and the frequency response of method C described in IEC 62153-4-3:2013 is calculated.The influences of frequency response of cable samples with different test methods and different coupling lengths on measurement results of transfer impedance are analyzed,which is verified by the transfer impedance measurement data of SYV-50-3-4 cable.The results show that shortening the coupling length of cable sample can not only improve the measured upper limit frequency of transfer impedance,but also improve the accuracy of measurement results.

关 键 词：转移阻抗 耦合长度 三同轴法 频率响应 电缆 

分 类 号：TM246[一般工业技术—材料科学与工程]