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International Journal of Antennas and Propagation
Volume 2012, Article ID 735080, 6 pages
http://dx.doi.org/10.1155/2012/735080
Research Article

Diversity Gain through Antenna Blocking

Position, Location, and Navigation Group, University of Calgary, 2500 University DR NW, Calgary AB, Canada T2N 1N4

Received 6 July 2011; Accepted 19 October 2011

Academic Editor: Byungje Lee

Copyright © 2012 V. Dehghanian et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

As part of the typical usage mode, interaction between a handheld receiver antenna and the operator's RF absorbing body and nearby objects is known to generate variability in antenna radiation characteristics through blocking and pattern changes. It is counterintuitive that random variations in blocking can result in diversity gain of practical applicability. This diversity gain is quantified from a theoretical and experimental perspective. Measurements carried out at 1947.5 MHz verify the theoretical predictions, and a diversity gain of 3.1 dB was measured through antenna blocking and based on the utilized measurement setup. The diversity gain can be exploited to enhance signal detectability of handheld receivers based on a single antenna in indoor multipath environments.