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Dual‐band microstrip‐line BPFs using tap‐coupling resonators
Author(s) -
Okuzaki Nobuhiko,
Shimakata Yukihiro,
Yamauchi Mitsuyuki,
Wada Kouji,
Iwasaki Takashi
Publication year - 2010
Publication title -
electronics and communications in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.131
H-Index - 13
eISSN - 1942-9541
pISSN - 1942-9533
DOI - 10.1002/ecj.10212
Subject(s) - passband , resonator , narrowband , microstrip , band pass filter , multi band device , attenuation , electronic engineering , filter (signal processing) , coupling (piping) , physics , equivalent circuit , topology (electrical circuits) , wideband , computer science , engineering , optoelectronics , electrical engineering , optics , mechanical engineering , voltage , antenna (radio)
We focused on various dual‐band microstrip‐line bandpass filters (BPFs) based on tap‐coupled resonators. Three types of BPFs, the basic type, multiple‐pole type, and wideband type, were proposed and designed by classical filter theory based on the narrowband approximation method. These filters were analyzed by original computation programs and commercial circuit and electromagnetic simulators. The proposed BPFs were then fabricated and measured in the laboratory. The results confirm that the proposed BPFs produce dual passband response, multiple attenuation poles, and wide‐passband characteristics. Very good agreement is found between the results of simulations and experiments. © 2010 Wiley Periodicals, Inc. Electron Comm Jpn, 93(6): 25–33, 2010; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/ecj.10212