CST – Computer Simulation Technology

RFID Smart Shelf With Confined Detection Volume at UHF
Carla R. Medeiros, Jorge R. Costa, Carlos A. Fernandes
IEEE Antennas and Wireless Propagation Letters
Volume: 7, 2008
Microstrip antennas, near fields, radio frequency identification (RFID), reader antenna, smart shelf
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.

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