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http://dx.doi.org/10.5515/JKIEES.2014.14.4.360

Single-Feed Composite Cavity-Backed Four-Arm Curl Antenna  

Ta, Son Xuat (Department of Electrical and Computer Engineering, Ajou University)
Park, Ikmo (Department of Electrical and Computer Engineering, Ajou University)
Publication Information
Journal of electromagnetic engineering and science / v.14, no.4, 2014 , pp. 360-366 More about this Journal
Abstract
A single-feed composite cavity-backed four-arm curl antenna is presented for use in global positioning systems (GPS). Its primary radiating element is fed by a vacant-quarter printed ring, which helps the antenna directly match to a $50-{\Omega}$ coaxial line and produce a good circular polarization (CP). The cavity-backed reflector is employed to improve the CP radiation characteristics in terms of 3-dB axial ratio (AR) beamwidth and minimum AR value. The optimized design with an overall size of $90{\times}90{\times}25mm^3$ ($0.4725{\lambda}_o{\times}0.4725{\lambda}_o{\times}0.13{\lambda}_o$ at 1,575 MHz) results in a ${\mid}S_{11}{\mid}<-10dB$ bandwidth of 8.66% (1,514-1,651 MHz) and a 3-dB AR bandwidth of 2.23% (1,555-1,590 MHz). The antenna radiates a widebeam right-hand circular polarization and operates with a measured radiation efficiency greater than 90% within its impedance matching bandwidth.
Keywords
Curl Antenna; Circular Polarization; Global Positioning System; Vacant-Quarter Printed Ring;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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