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Dual-mode bandpass filter using internally coupled stub-loaded resonators

✍ Scribed by Changzhou Hua; Chen Miao; Bo Li; Hui Wang; Wen Wu

Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
290 KB
Volume
53
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

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. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:643–646, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25769

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