屏蔽电缆转移阻抗时域测量方法研究  

Measurement method for the surface transfer impedance in time-domain

作　　者：张琦[1] 石立华[1] 周颖慧[1] 邵志学[1] 

机构地区：[1]解放军理工大学工程兵工程学院,江苏南京210007

出　　处：《电波科学学报》2011年第4期750-757,824,共9页Chinese Journal of Radio Science

基　　金：国家自然科学基金(51077133);教育部新世纪优秀人才支持计划资助

摘　　要：提出了屏蔽电缆转移阻抗时域测量的一种新方法。建立的时域测量系统由高压脉冲源、三同轴装置、阻抗匹配网络、数字存储示波器以及同轴衰减器组成,能够通过时域测量获得电缆表面转移阻抗曲线,同时可直接评估电缆芯线的电磁脉冲响应。与频域测量获得的转移阻抗比较表明,时域测量是准确的;建立的参数化模型能够准确估计屏蔽电缆的电磁脉冲响应,多组验证数据表明,模型使用效果良好。The measurement method of the surface transfer impedance of shielded cables in time domain is proposed. The measurement system consists of high voltage pulse source, triaxial device, impedance matching network and digital oscolloscope. It can measure the coupled voltage or current of shielded cables. Comparison results show that the curve of the proposed time-domain methods fits well with that of the traditional frequency-domain methods. A modeling method is further proposed to describe the surface transfer impedance by system functions. The established model can estimate the response of the shielded cable accurately. Several examples are used to verify the efficiency of the modeling method.

关 键 词：表面转移阻抗 三同轴装置 时域测量 电磁脉冲 

分 类 号：TM248.3[一般工业技术—材料科学与工程]