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一种基于散射参数测试的人工电源网络校准方法 被引量:1

A Calibration Method Based on Scattering Parameters of the Artificial Mains Network
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摘要 由于人工电源网络(LISN)精度直接影响到传导电磁干扰试验结果,通过分析LISN电路拓扑结构,建立了高频寄生参数模型及其等效电路,并利用散射参数法分析其校准特性参数,包括分压系数、隔离度、耦合抑制比与受试端阻抗.理论研究与实验结果表明,电路高频寄生参数对LISN受试端阻抗影响较大.在电感线圈中施加多个430Ω补偿电阻后可有效提高其特性参数,并为其设计提供理论依据. Because the artificial mains network(LISN) has a direct affect on the accuracy of test results on conducted EMI,this paper established a high-frequency parasitic parameters model and its equivalent circuit by analyzing LISN circuit topology,and analyzed its calibration parameters which include voltage division factor,isolation rejection ratio,coupling rejection ratio and EUT port impedance by using scattering parameter method.Theoretical and experimental results showed that high-frequency parasitic parameters had a great impact on EUT port impedance of LISN.By adding multiple 430Ω compensation resistors in the inductance coil,the parameters were effectively improved and a theoretical basis was provided for its design.
出处 《南京师范大学学报(工程技术版)》 CAS 2011年第2期4-8,共5页 Journal of Nanjing Normal University(Engineering and Technology Edition)
关键词 人工电源网络 寄生参数 S参数 校准 line impedance stabilization network parasitic parameter S parameter calibration
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