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Magneto-inductive HF RFID system

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Title: Magneto-inductive HF RFID system
Authors: Syms, R
Sydoruk, O
Wiltshire, M
Item Type: Journal Article
Abstract: Efforts to increase read range in passive HF RFID systems are hampered by the poor range scaling law of inductive coupling. An alternative approach to enlarging capture volume—increasing the lateral extent of the antenna—is proposed, using a magneto-inductive (MI) travelling wave arrangement to allow larger antenna sizes. A theory of load modulation in MI systems is first presented, together with field simulations in the capture volume. A 2.3 metre-long MI antenna is then constructed, and an active tag emulator is used to demonstrate load modulation. RFID is then demonstrated, with the antenna in both reflection and transmission modes, using a custom reader constructed from laboratory equipment. A transverse read range of 0.5 m is obtained using commercial off-the-shelf RFID cards with 12 W RF power, with high uniformity along the length of the antenna.
Issue Date: 1-Jun-2021
Date of Acceptance: 23-Nov-2020
URI: http://hdl.handle.net/10044/1/84964
DOI: 10.1109/JRFID.2020.3042719
ISSN: 1745-3216
Publisher: Inderscience
Start Page: 148
End Page: 153
Journal / Book Title: International Journal of Radio Frequency Identification Technology and Applications
Volume: 5
Issue: 2
Copyright Statement: © 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. See http://www.ieee.org/publications_standards/publications/rights/index.html for more information.
Sponsor/Funder: Mayor's Office of Policing and Crime
Funder's Grant Number: PO: 11400009298
Keywords: 0906 Electrical and Electronic Engineering
Publication Status: Published
Online Publication Date: 2020-12-09
Appears in Collections:Electrical and Electronic Engineering
Faculty of Engineering