An error free passive UHF RFID system using a new form of wireless signal distribution

Sithamparanathan Sabesan, Michael Crisp, Richard V. Penty, Ian H. White

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

8 Citations (Scopus)

Abstract

A wide area and error free ultra high frequency (UHF) radio frequency identification (RFID) interrogation system based on the use of multiple antennas used in cooperation to provide high quality ubiquitous coverage, is presented. The system uses an intelligent distributed antenna system (DAS) whereby two or more spatially separated transmit and receive antenna pairs are used to allow greatly improved multiple tag identification performance over wide areas. The system is shown to increase the read accuracy of 115 passive UHF RFID tags to 100% from <60% over a 10m × 8m open plan office area. The returned signal strength of the tag backscatter signals is also increased by an average of 10dB and 17dB over an area of 10m 8m and 10m × 4m respectively. Furthermore, it is shown that the DAS RFID system has improved immunity to tag orientation. Finally, the new system is also shown to increase the tag read speed/rate of a population of tags compared with a conventional RFID system.

Original languageEnglish
Title of host publication2012 IEEE International Conference on RFID, RFID 2012
Pages58-65
Number of pages8
DOIs
Publication statusPublished - 24 May 2012
Event2012 6th IEEE International Conference on RFID, RFID 2012 - Orlando, FL, USA United States
Duration: 3 Apr 20125 Apr 2012

Conference

Conference2012 6th IEEE International Conference on RFID, RFID 2012
CountryUSA United States
CityOrlando, FL
Period3/04/125/04/12

Keywords

  • distributed antenna system (DAS)
  • nulls
  • passive ultra high frequency (UHF) radio frequency identification (RFID)
  • range
  • read rate
  • read success rate
  • received signal strength indicator (RSSI)
  • tag orientation

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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