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Broadband slot arrays with wide H‐plane beamwidth
Author(s) -
Row JeenSheen,
Lin YanMing
Publication year - 2016
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.30176
Subject(s) - beamwidth , optics , broadband , fan beam antenna , physics , bandwidth (computing) , microwave , acoustics , engineering , dipole antenna , electrical engineering , telecommunications , antenna (radio) , antenna efficiency
Designs of 1 × 4 vertically polarized arrays with wide beamwidths are described. The array is composed of two pairs of monopole slot antennas, and each pair is excited with a differential feed scheme to reduce cross polarization. In addition, a rectangular metallic box is introduced as a reflector of the array to generate different beamwidths and improve front‐to‐back ratios. From the simulated results, it is found that by tuning the dimensions of the metallic box, the H‐plane half‐power beamwidth of the array can be varied between 90° and 180°. For each beamwidth case, the 10dB‐return‐loss bandwidth (BW) of the array can cover the band from 1.7 to 2.7 GHz; moreover, a cross polarization of lower than −20 dB, a front‐to‐back ratio of higher than 15 dB, and a beamwidth variation of <10° are also realized within the impedance BW. An experiment is also carried out to validate the simulation. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2871–2876, 2016