DocumentCode :
3562537
Title :
Asymmetrical radiation pattern synthesis of a linear array antenna by a least mean square method
Author :
Ngo Thi Huong ; Le Mai Ngoc Quynh Trang ; Nguyen Quoc Dinh ; Michishita, Naobumi ; Yamada, Yoshihide
Author_Institution :
Dept. of Fundamental of Radio & Electron. Eng., Le Quy Don Tech. Univ., Hanoi, Vietnam
fYear :
2014
Firstpage :
559
Lastpage :
562
Abstract :
In mobile base station antennas, linear array antennas are employing and asymmetrical radiation patterns are achieved. For multi frequency use, unequally spaced array configurations are preferable because of reducing grating lobes in higher frequency operations. Previously, radiation pattern synthesis methods were developed for equally spaced array configurations. In radiation pattern synthesis method, the least mean square (LMS) method was very conveniently used in mobile base station designing. The convenience of this method is obtaining array excitation coefficients by simply giving the objective radiation pattern. Moreover, the merit of this method is having the function of emphasizing design importance in the radiation angles that is called the weighting matrix. In this paper, a radiation pattern synthesis program based on LMS scheme is developed for unequally spaced array configuration. As an initial step, the accuracies of a developed program are examined. Through designing actual asymmetric radiation pattern with very low side lobe levels, the accuracies of program and effects of weighting matrix are ensured.
Keywords :
antenna arrays; antenna radiation patterns; least mean squares methods; mobile antennas; LMS method; LMS scheme; array excitation coefficients; asymmetrical radiation pattern synthesis; grating lobes; least mean square method; linear array antenna; mobile base station antennas; radiation angles; radiation pattern synthesis methods; radiation pattern synthesis program; weighting matrix; Antenna radiation patterns; Arrays; Base stations; Least squares approximations; Linear antenna arrays; Linear matrix inequalities; Mobile antennas; least mean square method; linear array antenna; radiation pattern synthesis; weighting matrix;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Advanced Technologies for Communications (ATC), 2014 International Conference on
Print_ISBN :
978-1-4799-6955-5
Type :
conf
DOI :
10.1109/ATC.2014.7043451
Filename :
7043451
Link To Document :
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