Miniaturized microstrip cross-coupled filters using quarter-wave or quasi-quarter-wave resonators

被引：43
|
作者：
Chen, CC [1 ]
Chen, YR [1 ]
Chang, CY [1 ]
机构：
[1] Natl Chiao Tung Univ, Inst Elect Commun Engn, Hsinchu 30050, Taiwan
来源：
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | 2003年 / 51卷 / 01期
关键词：
microstrip cross-coupled filter; miniaturized filter; Quarter-wave resonator; quasi-quarter-wave resonator;
D O I：
10.1109/TMTT.2002.806924
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：
Miniaturized microstrip filters using quarter-wave or quasi-quarter-wave resonators with cross-coupling are presented. The quarter-wavelength resonators enable very compact positively or negatively cross-coupled filters to be realized. The combination of quarter-wave and quasi-quarter-wave resonators facilitates the cross-coupling with a proper coupling phase. A new explanation for the coupling phase between the main-coupling and cross-coupling paths is proposed. Different filters that use the proposed resonators are realized and may have either quasi-elliptical or flat group-delay responses. Measurement results correlate well with theoretical predictions.
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页码：120 / 131
页数：12
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