Spatially Confined UHF RFID Detection With a Metamaterial Grid

Author

Morgado, Tiago A. ; Alves, Joao Marcus ; Marcos, Joao S. ; Maslovski, S.I. ; Costa, Jorge R. ; Fernandes, Carlos A. ; Silveirinha, M.G.

Author_Institution

Dept. de Eng. Electrotec., Univ. de Coimbra Polo II, Coimbra, Portugal

Volume

62

Issue

1

fYear

2014

fDate

Jan. 2014

Firstpage

378

Lastpage

384

Abstract

The confinement of the detection region is one of the most challenging issues in Ultra-High Frequency (UHF) Radio Frequency Identification (RFID) systems. Here, we propose a new paradigm to confine the interrogation zone of standard UHF RFID systems. Our approach relies on the use of an all-planar metamaterial wire grid to block the radiation field (i.e., the far-field) of the reader antenna, and thereby obtain a spatially well-confined detection region in the near-field. This solution is analytically and numerically investigated, and then experimentally verified through near-field and tag-reading measurements, demonstrating its effectiveness and robustness under external perturbations.

Keywords

UHF antennas; antenna radiation patterns; metamaterial antennas; radiofrequency identification; all-planar metamaterial wire grid; detection region confinement; interrogation zone; metamaterial grid; near-field measurement; radiation field; reader antenna; spatially well-confined detection region; spatially-confined UHF RFID detection; standard UHF RFID systems; tag-reading measurement; ultrahigh-frequency radiofrequency identification systems; Dipole antennas; Metamaterials; Probes; RFID tags; Wires; Metamaterials; near-field UHF RFID; radio frequency identification (RFID); wire media;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2013.2287027

Filename

6645379