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Compact microstrip stepped‐impedance resonator (SIR) using localized substrate integrated artificial dielectric (L‐SIAD)
Author(s) -
Wang Xiaoke,
Tang Wanchun,
Chow Y.Leonard
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.27327
Subject(s) - microstrip , stopband , passband , ground plane , resonator , materials science , microwave , band pass filter , electrical impedance , insertion loss , substrate (aquarium) , optoelectronics , dielectric resonator , electrical engineering , electronic engineering , telecommunications , engineering , antenna (radio) , oceanography , geology
This article presents a stepped‐impedance resonator (SIR) using microstrip line on localized substrate integrated artificial dielectric (L‐SIAD) structure. In L‐SIAD, the metal posts are periodically embedded in the lower substrate right under the microstrip line and connected to the ground plane, which results in the increasing of the effective permittivity and reduction of the SIR size, especially in the length of the SIR. The resonant frequencies of this SIR are analyzed for different post diameter, post height, and post period. Furthermore, the electromagnetic bandgap property due to the periodical posts is also studied, especially the influences on the resonant frequencies of the SIR. In final, this SIR is used to design an ultra‐wideband bandpass filter and the measured results demonstrated that the filter has broad upper stopband, low insertion loss in passband, and compact size. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:371–375, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27327