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Design of a multilayered dual‐band bandpass filter with transmission zeros
Author(s) -
Weng MinHang,
Yang RuYuan,
Chang YuChi,
Wu HungWei,
Shu Kevin
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.23585
Subject(s) - passband , band pass filter , resonator , filter (signal processing) , microwave , multi band device , electronic engineering , electrical impedance , coupling (piping) , materials science , prototype filter , electronic filter topology , optoelectronics , topology (electrical circuits) , physics , acoustics , filter design , engineering , electrical engineering , telecommunications , antenna (radio) , metallurgy
In this article, a dual‐band bandpass filter (BPF) using the multilayered structure is presented. The BPF consists of a pair of uniform impedance resonators on the top layer and a pair of step‐impedance resonators on the middle layer. By using the multilayered structure, the multitransmission zeros located near the passband edges, which is introduced by the crosscoupling effect, can be created to improve the filter selectivity. In addition, the bandwidths of the two passbands (2.4/5.2 GHz) can be tunable by adjusting the coupling gap distance between the resonators. The fabricated filter has a very compact size. Experimental results of the fabricated filter are well agreed with the simulation results. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2010–2013, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23585