Open AccessBeam steerable subarray with small footprint for use as building block in wall‐mounted indoor wireless infrastructure
Author(s) -
SalarRahimi Marzieh,
Vandenbosch Guy A.E.
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.2018.6189
Subject(s) - footprint , stripline , wireless , beam (structure) , microstrip , antenna (radio) , microwave , microstrip antenna , acoustics , matrix (chemical analysis) , electrical engineering , electronic engineering , topology (electrical circuits) , engineering , antenna array , physics , optics , telecommunications , materials science , paleontology , composite material , biology
A dedicated antenna topology targeting wall‐mounted beam‐steered mass‐producable wireless indoor applications in the microwave band is presented. Four linearly polarised E‐shaped microstrip patches are fed by a novel Butler matrix in a 2 × 2 array configuration, realising a very simple two‐dimensional beam steering. To isolate the beam forming network (BFN) from the patches and the wall, a multilayer stripline technology was used. The proposed passive BFN consists of stripline couplers without crossings or physically separate phase shifters, leading to a BFN fitting within the same footprint as the array itself. The overall size of the Butler matrix is only 0.54 λ 0 × 0.54 λ 0 × 0.06 λ 0. A prototype at 6 GHz has been realised and measured, proving the validity of the concept.