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Design of compact and high selectivity TRI‐band wideband microstrip BPF
Author(s) -
Deng Hongwei,
Zhao Yongjiu,
Zhou Xiaojun,
Fu Yong,
Liu Yanyun
Publication year - 2013
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.27334
Subject(s) - passband , resonator , stub (electronics) , band pass filter , microstrip , wideband , microwave , frequency selectivity , optoelectronics , electronic engineering , out of band management , materials science , physics , telecommunications , engineering , computer science , computer network , network architecture , network management station
In this article, a novel tri‐band wideband microstrip bandpass filter (BPF) with compact size and high selectivity is proposed using three sets of resonators, that is, λ/4 resonators, short‐stub loaded resonator, and λ/2 resonators.Each of the resonators can not only separately generate one passband, but also mainly control the passband performance. Due to the extended feed lines, parasitic coupling and intrinsic characteristics of the resonators, multiple transmission zeros can be created to improve the selectivity. A tri‐band wideband microstrip BPF centered at 2.0, 3.6, and 5.5 GHz is designed, and the predicted results are confirmed experimentally. The size is only 0.156 × 0.303 λ g in which λ g is the guided wavelength at 2.0 GHz. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:258–261, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27334