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Miniature dual‐wideband filter based on a quadruple‐mode metal cavity
Author(s) -
Zhang ZhiChong,
Zuo Tao
Publication year - 2021
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.22665
Subject(s) - passband , resonator , dual mode , wideband , coupling (piping) , mode (computer interface) , filter (signal processing) , mode coupling , materials science , physics , optics , degenerate energy levels , band pass filter , optoelectronics , electronic engineering , engineering , electrical engineering , computer science , quantum mechanics , metallurgy , operating system
A quadruple‐mode dual‐wideband filter is proposed in this paper. The proposed cavity resonator consists of two symmetrical conductive posts and a pair of downward pointing L‐shaped coupling probes in a cylindrical metal cavity, while four resonant modes of the resonator are classified as TM 11 mode, TM 01 mode and a pair of degenerate TE modes (TE+ mode and TE− mode). Successful excitation of the four modes is attributed to the two L‐shaped coupling probes. The first wide‐passband is realized by TM 11 mode and TM 01 mode, while the second wide‐passband is achieved by TE+ mode and TE− mode. Finally, a quadruple‐mode dual‐wideband filter is designed, fabricated and measured. The measurements are in good agreement with the simulations, which validates the design.