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A compact triple‐mode dielectric resonator in cylindrical cavity filter
Author(s) -
Wong SaiWai,
Feng ShiFen,
Zhang ZhiChong,
Zheng BingLong,
Zhu Lei,
Chu QingXin
Publication year - 2016
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.29878
Subject(s) - resonator , passband , microwave cavity , microwave , excited state , band pass filter , degenerate energy levels , dielectric resonator antenna , bandwidth (computing) , dielectric , fractional bandwidth , materials science , dielectric resonator , optoelectronics , filter (signal processing) , optics , physics , acoustics , electrical engineering , telecommunications , engineering , atomic physics , quantum mechanics
ABSTRACT A compact triple‐mode dielectric resonator (DR) bandpass filter (BPF) based on a single waveguide cavity is proposed, while three resonant modes of a single cavity are classified as a TM mode and a pair of hybrid degenerate modes (HE modes). Two HE degeneration modes in a single metal cavity are excited by using an off‐centered DR approach. They work together to constitute a three‐pole passband with a fractional bandwidth of 2.7% at the central frequency of 2.53 GHz. To verify the proposed idea, the proposed triple‐mode DR BPF is fabricated by using silver plated aluminum metal cavity, and the simulated and measured results are in good agreement. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:1645–1647, 2016