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

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 H z -field over a broad antenna aperture to identify the various items with stable reading performance. To obtain a strong n...

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Bibliographic Details
Published in:IEEE antennas and wireless propagation letters 2011, Vol.10, p.1100-1103
Main Authors: Chihyun Cho, Chuyong Lee, Jeongki Ryoo, Hosung Choo
Format: Article
Language:English
Subjects:
Antenna measurements
Aperture antennas
Current measurement
Item-level tagging (ILT)
near field
radio frequency identification (RFID)
Radiofrequency identification
reader antenna
UHF antennas
ultrahigh frequency (UHF) band
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Summary: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 H z -field over a broad antenna aperture to identify the various items with stable reading performance. To obtain a strong near H z -field, two coupled patches are employed along with a microstrip-line feed, resulting in average H z of -15 dBA/m on antenna aperture (30 × 30 × 10 cm 3 ). We also measured the reading range, and it confirmed that the proposed antenna is suitable for a commercial RFID smart-shelf application.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2011.2169929