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Design and implementation of microwave dual‐band bandpass filters using microstrip composite resonators
Author(s) -
Ma Zhewang,
Shimizu Taichi,
Kobayashi Yoshio,
Anada Tetsuo,
Hagiwara Gen
Publication year - 2008
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.23451
Subject(s) - band pass filter , passband , microwave , resonator , microstrip , electronic engineering , prototype filter , multi band device , composite number , filter (signal processing) , electronic filter topology , engineering , butterworth filter , materials science , electrical engineering , filter design , telecommunications , composite material , antenna (radio)
Abstract In this article, a novel type of dual‐band bandpass filter (DBBPF) is proposed by using microstrip composite resonators, and its design method is developed based on the lumped‐element equivalent circuit of the filter. Both the midband frequencies and the passband widths of the dual bands of the filter can be controlled separately. Four DBBPFs with different specifications are designed, fabricated, and tested, and the measured frequency responses agree favorably with theoretical predictions, validating sufficiently the proposed design theory and filter structures. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 1628–1632, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23451