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Planar Near-Field RFID Reader Antenna for Item-Level Tagging

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4 Author(s)
Chihyun Cho ; Commun. R&D Center, Samsung Thales, Seongnam, South Korea ; Chuyong Lee ; Jeongki Ryoo ; Hosung Choo

In this letter, we propose a novel UHF planar near-field antenna for the application of RFID item-level tagging. The proposed antenna was designed to have a strong and uniform Hz-field over a broad antenna aperture to identify the various items with stable reading performance. To obtain a strong near Hz-field, two coupled patches are employed along with a microstrip-line feed, resulting in average Hz of -15 dBA/m on antenna aperture (30 × 30 × 10 cm3). We also measured the reading range, and it confirmed that the proposed antenna is suitable for a commercial RFID smart-shelf application.

Published in:

Antennas and Wireless Propagation Letters, IEEE  (Volume:10 )