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J Electromagn Eng Sci > Volume 7(3); 2007 > Article
Journal of the Korean Institute of Electromagnetic and Science 2007;7(3):122-128.
DOI: https://doi.org/10.5515/JKIEES.2007.7.3.122   
A Side-Fed Circularly-Polarized Patch Antenna with a Dielectric Loading
Ji-Young Jeong1, Seung-Mo Choi2, Bayanmunkh Enkhbayar1, Ononchimeg Sodnomtseren1, Bierng-Chearl Ahn1
1School of Electrical and Computer Engineering, Chungbuk University
2Mito-RF Co.
Abstract
In this paper, we present the design and measurement of a side-fed circularly-polarized patch antenna with a dielectric loading. The antenna consists of a comer-truncated rectangular patch, an L-shaped ground plane, a dielectric loading material, and a coaxial probe. An antenna operating at the UHF band (910 MHz) for the RFID reader applications is optimized using a commercial software. The size of the patch is reduced by a factor of 1.73 by loading the patch with mono-cast(MC) nylon. Measurements of the fabricated antenna show performance characteristics comparable to those of much larger commercial RFID reader antennas.
Key words: Dielectric-Loaded Antenna, Circularly-Polarized Patch Antenna

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