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Compact cascaded quadruplet bandpass filter using artificial magnetic resonators
Author(s) -
Lee TaeHak,
Baik JungWoo,
Kim Youngsik
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.27410
Subject(s) - resonator , passband , band pass filter , physics , microwave , center frequency , acoustics , return loss , optics , materials science , engineering , electrical engineering , quantum mechanics , antenna (radio)
A compact cascaded quadruplet (CQ) bandpass filter (BPF) using artificial magnetic resonators is proposed in this letter.An artificial magnetic resonator, which has a negative effective permeability at the resonant frequency, consists of a shorted spiral structure. The negative‐mu characteristics are extracted from the simulation result of the scattering parameters in a fictitious rectangular waveguide. Compared with the open‐loop resonators that are usually used to construct conventional CQ‐BPFs, the proposed artificial magnetic resonator achieves about an 80% size reduction ratio. The measured insertion and return losses at a center frequency of 2.14 GHz are approximately 1.83 dB and 21 dB, respectively. The group delay is less than 0.81 ns in the W‐CDMA passband. The full‐wave simulation results are in good agreement with the measurement results. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:883–886, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27410