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Slot Antenna Performance and Signal Quality in a Smartphone Prototype

Research output: Contribution to journalArticle

  • Matthew W Webb
  • David R Gibbins
Original languageEnglish
Pages (from-to)1053-1056
Number of pages4
JournalIEEE Antennas and Wireless Propagation Letters
StatePublished - 2010


Antenna position and user grip on smartphone-like devices may lead to obstruction of radio signal paths and antenna detuning. A multiple-input-multiple-output (MIMO) outdoor propagation measurement campaign is presented, which collected data for slot antennas on a smartphone prototype. The antennas are in four positions, two polarizations, and one was obstructed due to operator grip. All MIMO links were measured within the channel's coherence time while standing, walking, and driving. We show how signal levels change due to obstruction, position, and motion and that signal fluctuations increase significantly, thus tending to impair service quality. We also examine how proximity of the operator's hand affects the antenna's radiation and input characteristics.

Additional information

Sponsorship: The authors acknowledge the partners of the Mobile VCE "MIMO Propagation Elective" for enabling collection of the propagation data. They also thank G. Hilton, W. Thompson, and M. Klemm for their help and useful discussions. Terms of use: Copyright © 2010 IEEE. Reprinted from IEEE Antennas and Wireless Propagation Letters. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Bristol's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to By choosing to view this document, you agree to all provisions of the copyright laws protecting it.

Research areas

  • obstruction, propagation, slot antenna

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