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ThinkMind // International Journal On Advances in Networks and Services, volume 2, number 1, 2009 // View article netser_v2_n1_2009_3


Adjustable Multi-Sector Cellular Base Station Antenna

Authors:
Senglee Foo
Bill Vassilakis

Keywords: Beam forming network, multi-beam, base station antenna, smart antenna, multi-sector array.

Abstract:
This article presents a dual beam array (DBA) for higher-order sectorization of a cellular site. This technique provides a means of cost-effective boosting network capacity without the use of additional frequency spectrum. The DBA comprises of a multi-column array and a beam forming circuit, which produces two overlapping beams with adjustable beam patterns. The proposed antenna is an adjustable cylindrical sector array, composed of three separate linear array columns. This structure allows for the formation of two overlapping beams with amplitude and phase excitations which can be implemented using a compact and low loss circuit. The adjustable offset displacement for the center column array allows for the refinement and adjustment of the pattern characteristics of the two overlapping beams. This method results in a beam split loss of less than 0.5dB in comparison to a single beam case. Performance parameters such as the beam cross-over loss and pattern discrimination between beams can also be adjusted in-situ for optimum operation.

Pages: 25 to 41

Copyright: Copyright (c) to authors, 2009. Used with permission.

Publication date: June 7, 2009

Published in: journal

ISSN: 1942-2644

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