Enhanced RFID tag detection accuracy using distributed antenna arrays

Authors
Ndifon, AM 
Crisp, MJ 
Penty, RV 
White, IH 

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Conference Object
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Abstract

© 2018 IEEE. An Ultra High Frequency (UHF) Radio Frequency Identification (RFID) system using distributed antenna arrays for interrogating RFID tags in a highly multipath environment is demonstrated. The system makes use of phase diversity and beam steering to overcome fading. The tag detection accuracy is compared to a standard fixed antenna system, showing that the presented system is able to deliver more power to the more challenging tags, and therefore is capable of a higher tag read success rate. It is also shown that, whereas a fixed antenna is capable of scanning a single cell, the ability of a phased array to scan through 360° azimuth leads to a reduction in number of antennas required for a multicell system. The experimental results are validated using a 3D field-based propagation model, which enables visualisation of the power distribution in the field of interest, and provides insight into the improved system performance.

Publication Date
2018
Online Publication Date
Acceptance Date
2018-01-29
Keywords
RFID, Distributed Antenna System, Phased array antennas, wireless modelling, Ultra High Frequency, Multipath
Journal Title
12th Annual IEEE International Conference on RFID, RFID 2018
Journal ISSN
2374-0221
Volume Title
Publisher
IEEE
Sponsorship
Engineering and Physical Sciences Research Council (EP/H007571/1)
Engineering and Physical Sciences Research Council (EP/G037256/1)