Premium
Dual butler matrix active antenna system
Author(s) -
Rahim Sharul Kamal Abdul,
Gardner Peter
Publication year - 2007
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.22913
Subject(s) - beamforming , antenna (radio) , microwave , engineering , matrix (chemical analysis) , amplifier , electrical engineering , electronic engineering , smart antenna , beam (structure) , telecommunications , communications system , noise (video) , acoustics , computer science , physics , directional antenna , materials science , structural engineering , image (mathematics) , artificial intelligence , composite material , cmos
This article describes a smart antenna system that employs low noise amplifiers and two cascaded Butler Matrices. The output signals from the first Butler Matrix, which acts as a beamforming network, have high gain and narrowbeam width for long distance communication while the outputs from the second Butler Matrix, which acts as a mirror of the first Butler Matrix, reconstructing the antenna patterns of the individual radiating elements, have high linearity and broad beam width that can be used for short distance communication. Switching or selecting between the two sets of beams allows reception to be optimized for either vehicle to vehicle or vehicle to roadside beacon communications. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 3004–3007, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22913