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RFID Smart Shelf with Confined Detection Volume at UHF

Medeiros, C. R. ; Costa, J.R. ; Fernandes, C. A.

IEEE Antennas and Wireless Propagation Letters Vol. 7, Nº --, pp. 773 - 776, October, 2008.

ISSN (print): 1536-1225
ISSN (online): 1536-1225

Journal Impact Factor: 1,312 (in 2008)

Digital Object Identifier: 10.1109/LAWP.2008.2008672

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This letter presents a smart shelf configuration for radio frequency identification (RFID) application. The proposed
shelf has an embedded leaking microstrip transmission line with extended ground plane. This structure, when connected to an RFID reader, allows detecting tagged objects in close proximity with proper field confinement to avoid undesired reading of neighboring shelves. The working frequency band covers simultaneously the three world assigned RFID subbands at ultrahigh frequency (UHF). The concept is explored by full-wave simulations and it is validated with thorough experimental tests.