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http://dx.doi.org/10.5515/KJKIEES.2009.20.2.174

A Hybrid Reader Antenna for Near- and Far-Field RFID in UHF Band  

Lee, Chu-Yong (School of Electronic and Electrical Engineering, Hongik University)
Han, Wone-Keun (Department of Physics, Hongik University)
Park, Ik-Mo (School of Electrical and Computer Engineering, Ajou University)
Choo, Ho-Sung (School of Electronic and Electrical Engineering, Hongik University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.20, no.2, 2009 , pp. 174-182 More about this Journal
Abstract
In this paper, we propose a novel hybrid reader antenna using a triangular and rectangular sub-patch for near- and far-field RFID reader in UHF band. The antenna operates at 912 MHz, and the low-cost mass-production is available, since the antenna can be built by printing on a FR-4 substrate. The triangular patch is designed to produce a circularly polarized radiation along the bore-sight direction and the rectangular sub-patch is designed to generate a strong magnetic field over the antenna aperture. The measurement shows Hz field greater than -25 dBA/m(3 cm above the antenna aperture), and exhibits circularly polarized radiation(AR<3 dB) with a radiation gain of 6 dBi.
Keywords
RFID; Near-Field Antenna; Circularly Polarization; Hybrid Antenna; Genetic Algorithm;
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