A wideband omnidirectional circularly polarized spiral antenna

A novel wideband omnidirectional circularly polarized (CP) antenna is presented. The antenna is constituted by spiral radiators and a dipole feeder. To configure the spiral radiators in cross shape leads not only omnidirectional radiations but also circularly polarization. Combining the spiral radia...

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Bibliographic Details
Published in2016 10th European Conference on Antennas and Propagation (EuCAP) pp. 1 - 2
Main Author Matsunaga, Mayumi
Format Conference Proceeding
LanguageEnglish
Published European Association of Antennas and Propagation 01.04.2016
Subjects
Broadband antennas
circularly polarized antennas
Dipole antennas
omnidirectional
planar
Satellite antennas
Satellites
Spirals
wide-beam
Wideband
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Summary:A novel wideband omnidirectional circularly polarized (CP) antenna is presented. The antenna is constituted by spiral radiators and a dipole feeder. To configure the spiral radiators in cross shape leads not only omnidirectional radiations but also circularly polarization. Combining the spiral radiators with a dipole feeder, the presented antenna achieves wideband CP radiations as keeping good S11 characteristics. The configuration and simulated characteristics of the antenna are presented. Simulation results show that the antenna achieve a -8 dB impedance bandwidth of 12.5% and a 4 dB axial ratio (AR) bandwidth of 20% in the boresight direction. At 3.66 GHz, the maximum gain is 4.4 dBi and the 4 dB AR beam-width is 120°.
DOI:10.1109/EuCAP.2016.7481871