滤波器腔间耦合系数快速提取方法  

Fast Extraction Method of Filter Inter-cavity Coupling Coefficients

作　　者：李刚[1] 胡旭[2] 

机构地区：[1]湖北文理学院物理与电子工程学院,湖北襄阳441053 [2]湖北文理学院经济与政法学院,湖北襄阳441053

出　　处：《电子科技》2016年第11期25-27,共3页Electronic Science and Technology

基　　金：湖北省自然科学计划基金资助项目(2015CFB663);湖北文理学院博士科研基金资助项目(2013B006)

摘　　要：传统基于优化理论的耦合系数提取方法依赖于繁琐的优化程序,耗时长且收敛效果无法保证。对此,提出一种快速的耦合系数提取方法。该方法从单端输入阻抗的零极点角度进行分析,推导出滤波器的特征多项式与谐振频率与零极点的函数关系,并采用Matlab语言编程实现了耦合系数提取算法。应用该算法对4阶切比雪夫滤波器的耦合系数进行了提取分析,提取结果与理论结果吻合良好,证明了该方法的正确性和有效性。The traditional extraction method based on the optimization theory is complicated, time-consuming and instable in convergence effect. This paper proposes a fast method of coupling coefficient extraction, which de- duces the function relation between the characteristic polynomial of the filter and the zero pole from the zero pole of the single ended input impedance. The coupling coefficient extraction algorithm is realized in the MATLAB language The method is used for the four-order Chebyshev filter. The results are in good agreement with the theoretical data which proves the validity and effectiveness of the proposed method.

关 键 词：散射参数 滤波器 耦合系数 阻抗匹配 无源器件 

分 类 号：TN713.5[电子电信—电路与系统]