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Compact triple‐band filter with adjustable passbands on one substrate integrated waveguide square resonant cavity
Author(s) -
Liu YiJie,
Zhang Gang,
Liu ShiCheng,
Yang JiQuan
Publication year - 2020
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.32491
Subject(s) - passband , band pass filter , square (algebra) , center frequency , waveguide , mode (computer interface) , substrate (aquarium) , filter (signal processing) , resonant cavity , materials science , optoelectronics , physics , optics , engineering , electrical engineering , computer science , mathematics , geometry , laser , oceanography , geology , operating system
A new compact triple‐band bandpass filter (BPF) with adjustable passbands based on only single substrate integrated waveguide (SIW) square resonant cavity is proposed in this letter. The first six resonant modes (the perturbed TE 101 ′ mode and TE 102 ′ mode, the perturbed TE 201 ′ mode and TE 202 ′ mode, the perturbed TE 301 ′ mode and TE 302 ′ mode) of the SIW cavity are controlled to constitute the three corresponding passbands by elaborately introducing metallic vias in the design. The three center frequencies and passband bandwidths can be effectively adjusted by only changing the location and sizes of these perturbations. For demonstration, a prototype SIW triple‐band BPF is designed, fabricated, and tested. Measured and simulated results are in good agreement, verifying the feasibility of the design concept.