DUAL-MODE BANDPASS FILTER USING INTERNALLY COUPLED STUB-LOADED RESONATORS

被引：1
|
作者：
Hua, Changzhou [1 ]
Miao, Chen [1 ]
Li, Bo [1 ]
Wang, Hui [1 ]
Wu, Wen [1 ]
机构：
[1] Nanjing Univ Sci & Technol, Ministerial Key Lab JGMT, Nanjing, Peoples R China
来源：
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS | 2011年 / 53卷 / 03期
关键词：
bandpass filter; coupled-lines; dual-mode; stub-loaded resonator; transmission zero; LOOP RESONATORS; MICROSTRIP;
D O I：
10.1002/mop.25769
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A dual-mode bandpass filter using stub-loaded resonators with internal coupled lines for high-selectivity application has been presented. Based on the odd- and even-mode equivalent circuits, the resonant characteristics of the proposed microstrip resonator are investigated. The proposed resonator is found to have the merit that the even-mode resonant frequencies can be flexibly controlled, whereas the odd-mode resonant frequencies are unaffected. It is also found that there is a finite-frequency transmission zero inherently through the stopband. Based on the proposed resonator, a compact and high-selectivity bandpass filter is demonstrated. Experimental results are presented, which confirm our idea. (C) 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:643-646, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25769
引用
收藏
页码：643 / 646
页数：4
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