WIDE BEAMWIDTH QUADIFILAR HELIX ANTENNA WITH CROSS DIPOLES

Wei-Xin Lin, Qing-Xin Chu
2013 Progress In Electromagnetics Research C  
A simple and novel method for increasing the gain at low elevation angle and widening the beamwidth of quadrifilar helix antenna (QHA) is presented. By adding cross dipoles as a reflector, the right hand circular polarization (RHCP) gain at 5 • elevation angle (θ = 85 • ) increases by about 1.4 dB. Parametric studies are performed to explore the performance improvements. An antenna for CNSS (Compass Navigation Satellite System, 2.492 GHz) application is realized based on the studies. The RHCP
more » ... in at 5 • elevation angle is about 0.6 dB, and 3 dB beamwidth is greater than 220 • . 10 dB impedance bandwidth is more than 24%, and 3 dB axial ratio bandwidth is more than 32%. Measured results are presented to validate the proposed method.
doi:10.2528/pierc13042403 fatcat:p33ycm3vdvasnpkrrgml5n6se4