一种基于曲线拟合的微波滤波器参数提取方法

doi:10.3969/j.issn.1001-2400.2011.04.018

Abstract

Abstract:

The traditional parmeter extraction for microwave filters usually depends on complicated optimization, or it is not suitable for lossy condition. This paper presents a new parameter extraction method for microwave filter design. The phase loading effect is analyzed and removed by using curve fitting technology, and then the unloaded quality factor of lossy microwave resonator is estimated. By making use of the least squares fitting method, admittance parameters of the filter can be extracted according to the EM simulation data, and then the coupling matrix is obtained from these parameters. The proposed approach is used to extract the parameters from EM simulation data of two kinds of microwave filters with a complicated structure. Extracted results aggree well with the simulation.

Key words: curve fitting, coupling matrix, parameter extraction, bandpass filter

CHEN Jianzhong;LIANG Changhong;CHEN Jia;LI Qi. Parameter extraction method for microwave filters based on the curve fitting technique[J].J4, 2011, 38(4): 101-105+123.

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Parameter extraction method for microwave filters based on the curve fitting technique

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