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http://dx.doi.org/10.15207/JKCS.2015.6.1.109

A Design of a circularly polarized small UHF RFID antenna  

Chae, Gyoo-Soo (Division of Information & Communication Eng., Baekseok University)
Publication Information
Journal of the Korea Convergence Society / v.6, no.1, 2015 , pp. 109-114 More about this Journal
Abstract
A circularly polarized small UHF RFID reader antenna is presented. The antenna is composed of four elements and printed on the plastic substrate(${\varepsilon}_r=2.2$, t=5mm). Each element is fed by a probe which is sequentially connected to the feed line. The feed line is manufactured on the FR-4 substrate(t=1.0mm, ${\varepsilon}_r=4.7$). The simulation results shows that the antenna can be achieved a return loss of 12dB, gain of 3.46dBic over the UHF band of 902-928MHz. According to our simulation results, two prototype antennas are manufactured and measured. The obtained antennas operate in UHF RFID bands and can be adapted for various portable applications. In addition, a parametric study is conducted to facilitate the design and optimization processes.
Keywords
Printed antenna; Shorted-strip; Inverted-F antenna; RFID; UHF; Circularly polarized; Convergence;
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Times Cited By KSCI : 1  (Citation Analysis)
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