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提出了利用开路阻抗参数矩阵分析EMI电源滤波器插入损耗的方法。分析共模、差模等效电路的阻抗参数和插入损耗的关系,通过Matlab绘出不同于50Ω测试系统时的插入损耗曲线,并用试验验证了方法的有效性。
A method to analyze EMI power filter insertion loss by using open impedance matrix is proposed. The relationship between the impedance parameters and the insertion loss of the common mode and differential mode equivalent circuits is analyzed. The insertion loss curve when the test system is different from 50Ω is plotted by Matlab, and the validity of the method is verified by experiments.