Analysis of four-stage stepped-impedance resonators and their application to quad-band microstrip bandpass filter

被引：11
作者：
Xie, Hao-Wei [1 ]
Zhou, Kang [1 ]
Zhou, Chun-Xia [1 ]
Wu, Wen [1 ]
机构：
[1] Nanjing Univ Sci & Technol, Sch Elect & Opt Engn, Nanjing, Jiangsu, Peoples R China
来源：
INTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING | 2020年 / 30卷 / 04期
基金：
中国国家自然科学基金;
关键词：
bandpass filter (BPF); cross-coupling; four-stage stepped-impedance resonator (FSSIR); quad-band; third-order; DUAL-PASSBAND; SELECTIVITY; DESIGN;
D O I：
10.1002/mmce.22116
中图分类号：
TP39 [计算机的应用];
学科分类号：
081203 ; 0835 ;
摘要：
Four-stage stepped-impedance resonator (FSSIR) is proposed and its resonant characteristics are analyzed in detail. The formulas of the first four resonances are deduced and the optimization techniques are presented on the basis of the impedance ratios. A quad-band bandpass filter with third-order filtering response in each passband is synthesized and designed as a demonstration of the application of the proposed FSSIR. Thanks to the cross-coupling topology and skew-symmetrical feeding configuration, multiple transmission zeros have been generated out of the passbands. Additionally, the frequency and the couplings of each passband can be flexibly controlled, respectively.
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页数：9
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