Open Access

Diversity Characterization of Optimized Two-Antenna Systems for UMTS Handsets

  • A. Diallo1Email author,
  • P. Le Thuc1,
  • C. Luxey1,
  • R. Staraj1,
  • G. Kossiavas1,
  • M. Franzén2 and
  • P. -S. Kildal3
EURASIP Journal on Wireless Communications and Networking20082007:037574

DOI: 10.1155/2007/37574

Received: 16 November 2006

Accepted: 22 November 2007

Published: 27 January 2008

Abstract

This paper presents the evaluation of the diversity performance of several two-antenna systems for UMTS terminals. All the measurements are done in a reverberation chamber and in a Wheeler cap setup. First, a two-antenna system having poor isolation between its radiators is measured. Then, the performance of this structure is compared with two optimized structures having high isolation and high total efficiency, thanks to the implementation of a neutralization technique between the radiating elements. The key diversity parameters of all these systems are discussed, that is, the total efficiency of the antenna, the envelope correlation coefficient, the diversity gains, the mean effective gain (MEG), and the MEG ratio. The comparison of all these results is especially showing the benefit brought back by the neutralization technique.

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Authors’ Affiliations

(1)
Laboratoire d'Electronique, Antennes et Télécommunications (LEAT), Université de Nice Sophia-Antipolis
(2)
Bluetest AB
(3)
Department of Signals and Systems, Chalmers University of Technology

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Copyright

© A. Diallo et al. 2007

This article is published under license to BioMed Central Ltd. 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.