一种微波滤波器的参数提取方法

A Method of Parameter Extraction for Microwave Filters

在微波滤波器的计算机辅助调试技术中,必须要知道滤波器的状态参数。以往的方法主要是通过滤波器的耦合矩阵来求得它的状态参数,但计算起来相当复杂。介绍一种简单易行的提取滤波器状态参数的方法,该方法通过建立滤波器的等效电路模型,运用软件的优化拟合功能,从而提取出等效电路模型的参数值。实验证明,只要搭建的电路模型精确度较高,就能够迅速、准确地提取出滤波器的状态参数。

State parameters of filters must be known in computer-aided tuning techniques for microwave filters. The state parameters of filters were calculated by its coupling matrix in methods ago, which is very complicated. A simple and easy method for state parameter extraction is described in this paper. It establishes an equivalent circuit model of filter and applies optimization and fitting performance of software, so it can extract parameters of the equivalent circuit model. Experiments show that ff the circuit model is accurate, state parameters can be extracted fast and exactly.