Open AccessMultibeam antenna using cavity‐based waveguide structure with extended hemispherical lens at millimetre wave
Author(s) -
Chauhan Shakti Singh,
Dalal Harikesh,
Abegaonkar Mahesh P.,
Basu Ananjan
Publication year - 2021
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/ell2.12154
Subject(s) - optics , beam waveguide antenna , bandwidth (computing) , waveguide , antenna (radio) , extremely high frequency , lens (geology) , millimeter , materials science , physics , coaxial antenna , radiation pattern , engineering , electrical engineering , telecommunications
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 TM 21 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.