A Planar Microwave Cavity Loaded with Ferrromagnetic Material: a new 8.2 MHz Anti-Theft Tag for Metallic Packaging within the Retail Sector
Lead Research Organisation:
UNIVERSITY OF EXETER
Department Name: Physics
Abstract
We propose to develop a new type of anti-theft tag based upon a planar microwave cavity loaded with ferromagnetic material. Many retail outlets currently use a system of tagging and detection developed by Checkpoint Systems Inc. for the protection of merchandise. The conventional planar tag is activated by an 8.2 MHz frequency alternating magnetic field applied perpendicular to its plane, rendering it ineffective on metallic surfaces due to eddy current shielding. The new tag is instead activated by an in-plane magnetic field. It will safeguard an important business sector for Crown Packaging UK, a leading manufacturer of metal packaging.
Publications
Keatley P
(2019)
A Ferrite-Filled Cavity Resonator for Electronic Article Surveillance on Metallic Packaging
in IEEE Transactions on Magnetics
Keatley P
(2014)
Ferrite-filled cavities for compact planar resonators
in Applied Physics Letters
Parke L
(2013)
Heavily loaded ferrite-polymer composites to produce high refractive index materials at centimetre wavelengths
in APL Materials
Description | Crown Packaging UK PLC |
Amount | £16,124 (GBP) |
Organisation | Crown Packaging UK |
Sector | Private |
Country | United Kingdom |
Start | 11/2011 |
End | 08/2012 |
Description | Crown Packaging UK PLC |
Amount | £16,124 (GBP) |
Organisation | Crown Packaging UK |
Sector | Private |
Country | United Kingdom |
Start |
Description | University of Exeter |
Amount | £47,137 (GBP) |
Organisation | University of Exeter |
Sector | Academic/University |
Country | United Kingdom |
Start | 11/2011 |
End | 08/2012 |
Description | Crown Packaging |
Organisation | Crown Packaging UK |
Country | United Kingdom |
Sector | Private |
PI Contribution | We developed an inductive tag that operates on metallic packaging. |
Collaborator Contribution | Crown brought the problem to our attention and advised us of various constraints |
Impact | Publications are listed, a patent application is not listed because it has not yet been granted. Only the Department of Physics & Astronomy has been involved. |
Start Year | 2008 |