接大地的双绞线负载响应简化模型

电子设备电源线一般为双绞线,由于结构特殊,在计算其受辐射负载响应时非常繁琐。很多情况下,电源线中有一条是连接大地的地线,且离地高度远大于绞线间距。针对该类双绞线受辐射时的负载响应计算问题,从Taylor模型出发,提出一种分析接地平行双线负载响应的简化模型,并推广至双绞线。该模型是将接地双绞线等效成电流为两倍的理想导电平面上的单导线模型,通过求解单线模型的BLT方程,计算其负载响应。与CST仿真结果的比较证明了该模型的有效性。

Simplified model for load response of twisted-wire pair connected with ground

The power cord of much electronic equipment is twisted-wire pair. Being a special structure, to calculate its load response by radiation is very cumbersome. In many cases, one of the twisted-wire pair is connected with ground, and the height from the ground to twisted-wire pair is more than the spacing between twisted-wire pair. For this model, based on the Taylor model, this paper proposed a simplified model which was calculated the load response of twisted-wire pair by radiation. The twisted-wire pair model was simplified as a single-wire model, its electric current was doubled. By solving the BLT equation, the load response of twisted-wire pair was calculated. The model was proved by comparing with the CST simulation results.