Title :
Planar Near-Field RFID Reader Antenna for Item-Level Tagging
Author :
Cho, Chihyun ; Lee, Chuyong ; Ryoo, Jeongki ; Choo, Hosung
Author_Institution :
Commun. R&D Center, Samsung Thales, Seongnam, South Korea
fDate :
7/3/1905 12:00:00 AM
Abstract :
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.
Keywords :
UHF antennas; antenna feeds; aperture antennas; microstrip antennas; microstrip lines; planar antennas; radiofrequency identification; UHF planar near-field antenna; antenna aperture; commercial RFID smart-shelf application; coupled patch; item-level tagging; microstrip line feed; planar near-field RFID reader antenna design; radiofrequency identification; stable reading performance; ultrahigh frequency antenna; uniform Hz-field; Antenna measurements; Aperture antennas; Current measurement; Radiofrequency identification; UHF antennas; Item-level tagging (ILT); near field; radio frequency identification (RFID); reader antenna; ultrahigh frequency (UHF) band;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2011.2169929
