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http://dx.doi.org/10.6109/jkiice.2016.20.12.2199

Design of a compact coplanar waveguide-fed 2-element quasi-Yagi antenna  

Baek, Woon-Seok (Department of Computer and Communication Military Science, Dongyang University)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.20, no.12, 2016 , pp. 2199-2205 More about this Journal
Abstract
In this paper, a design method for a coplanar waveguide (CPW)-fed 2-element quasi-Yagi antenna (QYA) is studied. A balun between CPW and coplanar strip (CPS) which feeds a planar dipole is implemented by connecting the one end of ground strips in a CPW to a signal strip. The antenna size is reduced by bent strip dipole and reflector, and an integrated balun. The proposed antenna was designed for the operation in a UHF radio frequency identification (RFID) band of 902-928 MHz, and the effects of various parameters such as dipole length, reflector length, distance between dipole and reflector, feed position were examined. The antenna with a size of $90mm{\times}80mm$ was fabricated on an FR4 substrate, and the experiment results reveal a frequency band of 885-942 MHz for a voltage standing wave ratio < 2, a gain > 4.3 dBi, and a front-to-back ratio > 7 dB over the frequency band for the UHF RFID.
Keywords
quasi-Yagi antenna; RFID antenna; CPW-fed; compact antenna; UHF antenna;
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