Open AccessMillimetre‐wave beam‐steering array antenna by emphasising on improvement of Butler matrix features
Author(s) -
Mousavi Zahra,
Rezaei Pejman
Publication year - 2019
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2018.5340
Subject(s) - broadside , beam steering , optics , broadband , bandwidth (computing) , antenna array , aperture (computer memory) , phased array , antenna aperture , phase shift module , engineering , physics , antenna (radio) , beam (structure) , radiation pattern , acoustics , telecommunications , insertion loss
To conquer troubles such as disruptive effects in mm‐wave frequency, many researches have been challenged. Beam‐steering antennas, especially with Butler matrix feed network, are a good suggestion to solve the aforementioned problem. In this study, an innovative design of the Butler matrix fed network is presented to drive patterns of the antenna. Moreover, a broadband Butler matrix feed network is achieved by a 1 × 4 aperture coupled zeroth‐order resonance elements which increases beam‐width of array pattern to triumph short‐range effect. Also using aperture fed, stable broadside pattern is obtained. The offered Butler matrix composes of four 90° couplers which have a combination of edge and patch techniques in the coupler, and two broadband stepped 45° phase shifters. The proposed compactness beam‐steering antenna covers an impedance bandwidth from 33.20 to 37.15 GHz and scans solid angle about ∼94° with the peak gain of 12 dBi.