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

Volume

10

fYear

2011

fDate

7/3/1905 12:00:00 AM

Firstpage

1100

Lastpage

1103

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 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 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 H_z-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;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2011.2169929

Filename

6030910