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Coaxial probe‐fed open‐ended waveguide antenna based on sand casting process with filtering characteristics and all‐in‐one structure
Author(s) -
Hu Zhenxin,
Wang Shiyan,
Tu Hanwen,
Li Yin,
Yu Yinhua,
Wu DuoLong
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.22494
Subject(s) - waveguide , antenna (radio) , filter (signal processing) , coaxial , context (archaeology) , materials science , acoustics , coaxial antenna , optics , waveguide filter , port (circuit theory) , beam waveguide antenna , antenna feed , electronic engineering , computer science , optoelectronics , dipole antenna , engineering , electrical engineering , physics , prototype filter , filter design , telecommunications , geology , paleontology
In this article, a coaxial probe‐fed open‐ended waveguide filtering antenna with all‐in‐one structure is proposed and fabricated by adopting sand casting process. It is known that for waveguide component with complex internal space, detached parts, and post‐processing assembly are often necessary, while unavoidably resulting in error, air gap and loss. In this context, sand casting process is here utilized to fabricate the whole waveguide structure directly, thus achieving a fully integrated antenna. Besides, by controlling the external couplings from probe feed and free space, the proposed coaxial probe‐fed antenna can provide similar impedance matching to a waveguide‐fed three‐order waveguide filter. Both the frequency‐ and time‐domain reflection coefficients of filter and antenna have been compared and analysed. An antenna prototype is fabricated and measured to validate the proposed design, which provides a successful example of all‐in‐one waveguide filtering antenna.