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http://dx.doi.org/10.5515/KJKIEES.2008.19.5.562

Design of a CP Spiral RFID Reader Antenna in UHF Band  

Lee, Chu-Yong (School of Electronic and Electrical Engineering, Hongik University)
Choo, Ho-Sung (School of Electronic and Electrical Engineering, Hongik University)
Park, Ik-Mo (School of Electrical and Computer Engineering, Ajou University)
Han, Wone-Keun (Department of Physics, Hongik University)
Publication Information
Abstract
In this paper, we propose a novel structure of a spiral antenna with a CP characteristic for RFID reader in UHF band. Since the proposed antenna can be built by printing on a FR-4 substrate, it is appropriate for low-cost mass-production. The antenna is designed to operate in UHF band of $860{\sim}960$ MHz. The CP bandwidth is Increased enough to cover an overall UHF RFID band by using a spiral structure for the antenna arm. The matching bandwidth is broadened by using a quarter-wave transformer between the fred and the antenna body. The proposed antenna has advantages of its easy gain and pattern control with a small antenna size. The measured antenna performance shows the matching bandwidth of 13%, the CP bandwidth of 23%, and the gain of 6.5 dBi. This verifies that the proposed antenna is appropriate for RFID antennas in UHF band.
Keywords
RFID; CP Spiral Reader Antenna; Genetic Algorithm;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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