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Miniaturized dual‐band filter using triple‐folded substrate‐integrated waveguide resonators
Author(s) -
Li Mingkang,
Jiang Shan,
Chen Chang,
Chen Weidong,
Zhang Hualiang
Publication year - 2018
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.31299
Subject(s) - resonator , materials science , multi band device , filter (signal processing) , substrate (aquarium) , folding (dsp implementation) , dual mode , waveguide , waveguide filter , band pass filter , optoelectronics , resonance (particle physics) , miniaturization , helical resonator , passband , electronic engineering , prototype filter , engineering , physics , filter design , electrical engineering , nanotechnology , oceanography , particle physics , antenna (radio) , geology
A miniaturized dual‐band filter using novel triple‐folded substrate‐integrated waveguide (TFSIW) resonators is proposed in this paper. The proposed TFSIW is enabled by specially designed folding structures, which leads to significant size reduction. The 2 lowest resonant modes, namely folded TE 102 mode and folded TE 101 mode in the TFSIW cavity, are utilized to achieve a dual resonance response with a small frequency ratio. To validate the design concept, a dual‐band filter operating at 1.91 and 2.32 GHz is designed, fabricated and characterized. Good agreement has been achieved between the simulation and measurement results. Moreover, the size of the proposed TFSIW resonator has been reduced for 86% compared with the conventional SIW resonator (assuming the same frequency ratio).