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Wide stopband single‐/dual‐bandpass filters using rotational symmetric composite right/left‐handed resonators
Author(s) -
Guo ZhiGui,
Yang GuoMin
Publication year - 2017
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.30221
Subject(s) - stopband , passband , band pass filter , resonator , microwave , elliptic filter , physics , transition band , prototype filter , acoustics , materials science , topology (electrical circuits) , electronic engineering , filter (signal processing) , optics , engineering , low pass filter , electrical engineering , quantum mechanics
Both single‐/dual‐bandpass wide stopband filters with rotational symmetry using composite right/left‐handed resonators are proposed in this study. Designs of this type obtain a single passband at 2.40 GHz as well as dual passbands at 2.40 and 5.20 GHz, and achieve a wide stopband with no additional structures, which are implemented and demonstrated with full‐wave simulations and measurements. Standing wave coupling models are presented to analyze the characteristics of a wide stopband effectively. The proposed single‐bandpass filter (BPF) with rotational symmetry achieves a preferable wide stopband, in which | S 21 | is mainly <−20 dB below 19.00 GHz; the proposed dual‐BPF also obtains a wide stopband, in which | S 21 | < −20 dB below 16.90 GHz. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:49–53, 2017
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