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Title: RFID reader antennas for TAG detection in self-confined volumes at UHF
Authors: Medeiros, Carla R.
Costa, Jorge R.
Fernandes, Carlos A.
Keywords: RFID
RFID antennas
UHF antennas
Microstrip antennas
Near-field UHF RFID
Smart RFID reading surfaces
Issue Date: Apr-2011
Publisher: IEEE
Abstract: Confinement of the detection region is a critical issue for some important RFID applications, where the coarse location of the object is required along with its identification. In the UHF band, it is a challenge to confine antenna radiation to reasonably sharp interrogation volumes, <; 10λ3, without resorting to physical barriers. This paper presents a novel approach for RFID reader radiating structures that self-confine tag detection to a desired volume, avoiding undesired readings outside the interrogation volume. The proposed solution simultaneously covers the three world-assigned RFID frequency subbands at UHF. To demonstrate the effectiveness of the solution, the proposed configuration was integrated into bookshelves, a conveyor belt system, and a proximity point reader. Together with an appropriate control application, these form the building blocks of a smart store with automatic inventorying and billing capability. The radiating structure concept was explored by full-wave simulations, and it was validated with both near-field measurements and with tag-reading scores. Short demonstration videos are available online.
Description: WOS:000300358000004 (Nº de Acesso Web of Science)
“Prémio Científico ISCTE-IUL 2012”
Peer reviewed: Sim
ISSN: 1045-9243
Publisher version: The definitive version is available at:
Appears in Collections:CTI-RI - Artigos em revistas científicas internacionais com arbitragem científica
IT-RI - Artigo em revista internacional com arbitragem científica

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