Power margin reduction in linear passive UHF RFID tag arrays

Qi Zhang, Michael Crisp, Ian H. White, Richard V. Penty

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (SciVal)

Abstract

This paper studies the power margin reduction in linear passive UHF RFID tag arrays due to proximity effects. It is shown experimentally that a 40% reduction in tag power margin occurs when two tags are placed with a separation of less than 2cm. Major causes of tag sensitivity degradation due to proximity in arrays are analyzed by experiment and simulation, including tag detuning, shadowing and re-emission cancellation. It is shown that tag detuning has a significant effect when tags are separated by less than 7mm. At larger separations in excess of 1cm, the tag shadowing effect and interactions between the backscattered waves cause more significant degradation for large tag arrays.

Original languageEnglish
Title of host publication2014 IEEE RFID Technology and Applications Conference, RFID-TA 2014
PublisherIEEE
Pages306-311
Number of pages6
ISBN (Electronic)9781479946808
DOIs
Publication statusPublished - 23 Oct 2014
Event2014 IEEE RFID Technology and Applications Conference, RFID-TA 2014 - Tampere, Finland
Duration: 8 Sep 20149 Sep 2014

Conference

Conference2014 IEEE RFID Technology and Applications Conference, RFID-TA 2014
Country/TerritoryFinland
CityTampere
Period8/09/149/09/14

Keywords

  • close proximity
  • detuning
  • passive ultra high frequency (UHF)
  • radio frequency identification (RFID)
  • re-emission cancellation
  • read range
  • shadowing

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Computer Science Applications
  • Electrical and Electronic Engineering

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