多芯屏蔽电缆屏蔽效能的脉冲电流注入法测量  

Measurment of Shielding Efficiency for Multi-wire Shielded Cables by Injecting Method of Pulse Current

作　　者：周启明[1] 李小伟[1] 黄聪顺[1] 邓建红[1] 罗学金[1] 

机构地区：[1]中国工程物理研究院电子工程研究所,四川绵阳621900

出　　处：《信息与电子工程》2007年第2期150-153,共4页information and electronic engineering

基　　金：国防行业重点预先研究资助项目

摘　　要：为了测量脉冲电流注入电缆的时域屏效,采用皮电流I0与短路芯电流Id峰峰值之比的分贝数求解电缆的屏蔽效能方法,给出了某百芯屏蔽电缆的等效电压源内阻和屏蔽效能值,并对外场辐射试验法中的某百芯初样电缆总的屏蔽效果进行了计算和讨论。In this paper, shielding efficiency of cable is definded as decibel of ratio between skin current and core-current p-p value. The measuring method of current injection is introduced for the shielding efficiency of multi-wire cable. The internal resistance of equivalent voltage source and shielding efficiency are obtained for the cable of a hundred wires. The measuring results of total shielding effect for first sample cable with a hundred wires in external field testing are calculated and discussed.

关 键 词：屏蔽效能 多芯电缆 电流注入 时域测量方法 

分 类 号：TM246[一般工业技术—材料科学与工程]