A multiarm curl antenna for GPS applications

Son Xuat Ta and Ikmo Park

Journal of Electromagnetic Waves and Applications, 2015, vol. 29, issue 1, 80-91

Abstract: A single-feed dual-band antenna with wide-beam circularly polarized (CP) radiation is introduced for application in the global positioning system (GPS). The primary radiating element is a planar multiarm curl antenna. The dual-band operation is achieved by dividing the arms of the antenna into two branches of different lengths. To generate CP radiation, the radiator is fed by double vacant-quarter printed rings, which allows direct matching of the antenna to a single 50 Ω coaxial line. To enable unidirectional CP radiation and improve the 3 dB axial ratio (AR) beamwidth, the planar multiarm curl radiator is backed by a rectangular cavity-backed reflector. The final design, with an overall GPS-L2 frequency size of approximately λo/2.45 × λo/2.45 × λo/8, resulted in a |S11|

Date: 2015
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DOI: 10.1080/09205071.2014.981298

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