RFID Grids: Part I-Electromagnetic Theory

The close displacement of UHF RFID tags can be considered as an electromagnetic interconnected system having specific properties. The so denoted RFID Grid includes single-chip tags in close mutual proximity or a single tag with a multiplicity of embedded microchips. A multi-port scattering framework...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2011-03, Vol.59 (3), p.1019-1026
Main Author: Marrocco, G
Format: Article
Language:English
Subjects:
Antennas
Applied classical electromagnetism
Applied sciences
Backscattering
coupling
Displacement
Electromagnetic wave propagation, radiowave propagation
Electromagnetics
Electromagnetism
electron and ion optics
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
grid
Impedance
Loaded antennas
Modulation
Physics
Radio frequency identification
Radiofrequency identification
Radiolocalization and radionavigation
Readers
RFID
Scavenging
Security
sensor
Systems, networks and services of telecommunications
Tags
Telecommunications
Telecommunications and information theory
Transmission and modulation (techniques and equipments)
UHF
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Description
Summary:The close displacement of UHF RFID tags can be considered as an electromagnetic interconnected system having specific properties. The so denoted RFID Grid includes single-chip tags in close mutual proximity or a single tag with a multiplicity of embedded microchips. A multi-port scattering framework is used to derive the macroscopic parameters governing the system response which could be optimized for the specific application. Moreover, unique features are introduced, such as the possibility to improve the power scavenging and the generation of analog identifiers and fingerprint. The last ones are electromagnetic responses independent on the position and orientation of the reader and on the nearby environment, with great relevance for Sensing and Security.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2010.2103019