Premium
Compact and high selectivity dual‐mode dual‐band microstrip BPF with QWR and SLR
Author(s) -
Deng Hongwei,
Zhao Yongjiu,
Fu Yong,
Zhou Xiaojun,
Liu Yanyun
Publication year - 2012
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.27211
Subject(s) - passband , resonator , band pass filter , stub (electronics) , multi band device , microstrip , microwave , optoelectronics , bandwidth (computing) , dual mode , physics , materials science , optics , electronic engineering , telecommunications , computer science , engineering , antenna (radio) , quantum mechanics
In this letter, a novel compact and high selectivity dual‐mode dual‐band microstrip bandpass filter (BPF) with quarter‐wavelength resonator and stub‐loaded resonator is proposed using extended feed lines.Either of the SIRs cannot 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. Meanwhile, the BPF can obtain compact size due to the folded resonators and feed lines. A dual‐mode dual‐band BPF with the fractional bandwidth 15.6 and 6.4% is designed and fabricated. The simulated and measured results show a better agreement and validate the proposed theory. The size is only 0.185λ g × 0.130λ g in which λ g is the guided wavelength at the first passband center frequency. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 2702:2705, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27211