基于偶极子近似方法的互联电缆辐射场研究

Prediction of Interconnect Cable Radiated Emissions Using the Hertzian Dipole Method

为解决大规模电力电子系统互联导线的空间辐射干扰计算问题,本文基于偶极子天线理论和传输线频域分析方法,提出了一种导线辐射场的快速计算方法,该方法在计算模型中考虑了电缆两端联接端子和支撑体的影响,利用屏蔽暗室中的天线测试结果,证实了计算模型的正确性。

This paper presents a modeling technique to speed up the evaluation of radiated fields from interconnect cables. Based on the Hertzian dipole radiation theory and transmission line frequency-dependant solutions, the radiating source is modeled by the sum of a large number of short dipoles. This model allows the contributions of line-end discontinuities to be included through a VNA measurement together with a monopole approximation. The proposed method is verified by an open-line cable measurement.