Hairpin filters with tunable transmission zeros

2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157) Pub Date : 2001-05-20 DOI:10.1109/MWSYM.2001.967346

C. Tsai, Sheng-Yuan Lee, Chin-Chuan Tsai

引用次数: 21

Abstract

In the previous work, it was found that filter designed with 0/spl deg/ feed structure could have two extra transmission zeros in the stopband. In this paper, a method for tuning the frequencies of these two transmission zeros using impedance transformers is proposed. These zeros can be tuned to reject unwanted signals near the passband, such as image signals, This new approach has been experimentally verified with three second-order Butterworth filters.

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带有可调传输零点的发夹滤波器

在之前的工作中发现，采用0/spl度/馈电结构设计的滤波器可以在阻带中有两个额外的传输零。本文提出了一种利用阻抗互感器对这两个传输零点的频率进行调谐的方法。这些零点可以调谐以抑制通带附近不需要的信号，例如图像信号。这种新方法已经用三个二阶巴特沃斯滤波器进行了实验验证。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157)

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