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High‐selectivity triband bandpass filter based on dual‐plane microstrip/slotline structure
Author(s) -
Shi LiYun,
Wang Ning,
Wu LinSheng
Publication year - 2015
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.29305
Subject(s) - passband , band pass filter , resonator , microstrip , microwave , dual mode , electronic engineering , materials science , optoelectronics , physics , engineering , telecommunications
A compact and high‐selectivity triband bandpass filter (BPF) is proposed. The filter has a dual‐plane structure, consisting of a pair of dual‐mode open‐loop microstrip resonators and a dual‐mode slotline resonator. Using this structure, three passbands as well as five transmission zeros near the passband edges can be generated simultaneously. The triband BPF operating at 1.2 GHz (GPS application), 1.8 GHz (DCS application), and 2.4 GHz (WLAN application) is designed and fabricated. Measurement results agree well with the simulated results. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:2225–2228, 2015