屏蔽电缆的抽头效应分析

An analysis of the pigtail effect of the shielded cable

抽头是屏蔽电缆泄漏最严重的部分.利用传输线理论和广义二端口网络法提出了求解包含抽头线的多导体传输线串扰的分析方法,计算出不同抽头长度和屏蔽层的不同接地方式下耦合到屏蔽芯线上的电压和电流,最后从理论上分析了产生这种结果的原因,并提出减小这种耦合的方法.

The leakage of the pigtail section of a shielded cable is the most serious. In this paper, an analytical technique for multiconductor transmission lines crosstalk is presented by using the transmission line theory and the generalized twoport network method. Then the corresponding voltages and currents coupling to shielded wires are obtained with differentlength pigtails and different shieldgrounding configurations. Finally, the reason for producing this effect is discussed theoretically and a means of reducing the coupling is proposed.