Multibeam antenna using cavity‐based waveguide structure with extended hemispherical lens at millimetre wave

Abstract A multibeam antenna with a single input port using a cavity‐based waveguide structure is implemented. The proposed structure uses a cylindrical cavity and a higher‐order TM21 mode is excited in it. The higher‐order mode is to divide the incoming power in three different directions. The beam...

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Bibliographic Details
Published in:Electronics Letters
Main Authors: Shakti Singh Chauhan, Harikesh Dalal, Mahesh P. Abegaonkar, Ananjan Basu
Format: Article
Language:English
Published: Wiley 2021-07-01
Subjects:
Optical waveguides and couplers
Waveguides and microwave transmission lines
Optical waveguides
Single antennas
Online Access:https://doi.org/10.1049/ell2.12154
Description
Summary:Abstract A multibeam antenna with a single input port using a cavity‐based waveguide structure is implemented. The proposed structure uses a cylindrical cavity and a higher‐order TM21 mode is excited in it. The higher‐order mode is to divide the incoming power in three different directions. The beam in three different directions is confined by using a 3D‐printed extended hemispherical lens integrated at three openings at the cylindrical cavity. The proposed structure has measured an impedance bandwidth of 1.7 GHz from 56.9 to 58.6 GHz. The achieved beam directions for the proposed antenna structure is 0, 87 and 270°. The measured gain of the antenna for each beam directions is better than 12 dBi.
ISSN:0013-5194
1350-911X

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