并联耦合线滤波器的优化设计

H. Oraizi, M. Moradian, K. Hirasawa
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引用次数: 1

摘要

本文提出了一种基于最小二乘法的边耦合或并联耦合线滤波器的设计与优化方法,该方法具有任意源阻抗与负载阻抗匹配的特点。基于偶模和奇模理论,利用阻抗、传输和散射矩阵,构造了实现特定通带插入损耗和阻带返回损耗的误差函数。对线的长度、宽度和间隙进行误差函数的最小化,从而确定滤波器的配置。所提出方法的计算机实现,与可用的全波分析软件、样品滤波器的制作和测试进行比较,表明所提出方法的易于应用和优于其他方法(如阻抗匹配、增加带宽和易于计算机实现)。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Optimum design of parallel coupled-line filters
In this paper, a design and optimization procedure based on the method of least squares is presented for edge-coupled or parallel coupled-line filters, with impedance matching of arbitrary source and load impedances. An error function is constructed for the implementation of specified insertion loss in the passband and return loss in the stopband, based on the even- and odd-mode theory using the impedance, transmission and scattering matrices. The minimization of error function is performed with respect to the lengths, widths and gap spacings of lines, which determines the filter configuration. Computer implementation of the proposed method, comparison with the available full-wave analysis softwares, fabrication, and testing of sample filters, indicate the ease of application and advantages of the proposed method over the other methods (such as impedance matching, increasing bandwidth, and ease of computer implementation)
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