基于场型分布的滤波器腔间耦合极性辨别方法  

A method of Coupling Polarity Discrimination Based on Field Distribution of the Filter

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8期100-102,共3页Electronic Science and Technology

摘　　要：谐振腔体间的耦合极性是决定滤波器传输零点数量和位置的重要参数。传统方法在确定耦合极性的过程中,需要在理想电壁和理想磁壁边界条件下多次进行本征模仿真,步骤复杂且耗时很长。为解决这一问题提出了一种耦合极性快速辨别方法,该方法通过对耦合腔体进行一次本征模全波仿真,从最低本征谐振频率对应的场分布角度即可快速判断腔体耦合极性。文中分析了一个复杂耦合情况算例,并与传统方法分析得出的结论进行对比,结果的一致性证明了该方法的准确性,具有较好的工程实用性。The coupling between the resonant cavity is an important parameter to determine the number and po- sition of the filter zeros. In the process of determing the coupling polarity, we need to simulate the eigen mode multi- ple times in the perfect electric and magnetic boundary conditions. The steps are complex and time consuming. The paper presents a fast identification method to distinguish the coupling type in the design of the filter. In this method, the coupled cavity is characterized by a full wave simulation of the eigen mode and the coupling type of the cavity can be quickly judged from the field distribution of the lowest intrinsic resonance frequency. At last, the example of a complex coupling type is analyzed and the results are compared with the traditional method. The results show that the method has good accuracy and has a good practical value.

关 键 词：滤波器 耦合类型 反射系数 耦合系数 零极点频率 

分 类 号：TN713.5[电子电信—电路与系统]