Title :
A Circularly Polarized Cylindrical Dielectric Resonator Antenna Using a Helical Exciter
Author :
Motevasselian, Alireza ; Ellgardt, A. ; Jonsson, B.L.G.
Author_Institution :
Sch. of Electr. Eng., KTH-R. Inst. of Technol., Stockholm, Sweden
fDate :
3/1/2013 12:00:00 AM
Abstract :
A novel circularly polarized cylindrical dielectric resonator antenna excited by an external tape helix is presented. The helix is fed by a coaxial line through a small hole on a finite size ground plane. The configuration offers a compact and easy to fabricate feeding network providing a 3 dB axial-ratio bandwidth of 6.4%. A prototype of the proposed configuration is fabricated and measured. Measured and simulated return loss, axial-ratio, radiation pattern, and realized gain are presented and discussed together with design guidelines.
Keywords :
antenna feeds; antenna radiation patterns; dielectric resonator antennas; polarisation; ήnite size ground plane; antenna radiation pattern; axial-ratio; circular polarized cylindrical dielectric resonator antenna; coaxial line; external tape helix; gain 3 dB; helical exciter; Antenna measurements; Antenna radiation patterns; Bandwidth; Dielectric constant; Dielectric resonator antennas; Helical antennas; Circular polarization; cylindrical; dielectric resonator antenna; helix; probe feed;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2012.2229954
