测量匹配网络S参数的转换模型  

Conversion model in measurement of S-parameter for matching network

作　　者：窦建华[1] 徐兰天[1] 杨学志[1] 

机构地区：[1]合肥工业大学计算机与信息学院,合肥230009

出　　处：《电子测量与仪器学报》2011年第2期191-197,共7页Journal of Electronic Measurement and Instrumentation

基　　金：国家自然科学基金(编号:60672120)资助项目;安徽省优秀青年科技基金(编号:10040606Y09)资助项目

摘　　要：给出了复特征阻抗间的S参数转换模型、差模和共模的S参数转换模型。该模型基于亥姆霍兹方程、戴维南定理,采用信号流图的分析方法,完成了任意特征阻抗间的S参数转换以及不同工作模式下的S参数转换。该模型弥补了矢量网络分析仪(VNA)测量匹配网络S参数的不足。该模型转换的结果与软件仿真的结果进行比较结果表明,S参数的幅度误差小于0.025 dB,相位误差小于0.018°;共模和差模输入阻抗的幅度误差小于0.05 dB,相位误差小于0.35°。A conversion model of S-parameter is proposed for plural characteristic impedances in common mode and differential mode. The model is based on Helmholtz Equation and Thevenin＇s theorem. S-parameters among arbitrary characteristic impedances and different operating modes could be transformed using analysis method of signal flow graph. This model has made up for the inadequacy of S-parameter measurement for matching networks using the vector Network Analyzer （VNA）. Comparison between conversion results of this model and Agilent ADS simulation indicates that amplitude error of S-parameters is better than 0.025 dB and phase error is less than 0.018°, amplitude error of input impedance for both common mode and differential mode is better than 0.05 dB and phase error is less than 0.35°.

关 键 词：匹配网络 S参数 转换模型 信号流图 

分 类 号：TP391.72[自动化与计算机技术—计算机应用技术]