广义切比雪夫滤波器等效电路参数的提取

The Extraction of Equivalent Circuit Parameters for General Chebyshev Filter

通过对等效电路的分析,对广义切比雪夫滤波器各归一化参数的物理意义做了明确的说明,并且,在指定传输零点位置和电路拓扑结构的情况下,采用优化方法,提出了一种灵活有效的提取广义切比雪夫滤波器等效电路参数的方法。最后,用MATLAB编程实现了等效电路参数的自动化提取。

General Chebyshev filter is a kind of high performance filter, whose parameters extraction with classic synthesis method is complicated and the topological structure formed by the method is unchangeable, this is inconvenient to use. In this paper, we show the clear physical meaning of each normalized circuit parameter by analyzing the equivalent circuit. Then based on the optimization method, we provide an effective and flexible method to extract the circuit parameters of general Chebyshev filter, when giving the position of the transmission zeros and the topology of the circuit. Finally MATLAB is utilized to implement the automatic extraction of equivalent circuit parameters.