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- Title
WIDE BEAMWIDTH QUADIFILAR HELIX ANTENNA WITH CROSS DIPOLES.
- Authors
Wei Xin Lin; Qing Xin Chu
- Abstract
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, 2.492GHz) application is realized based on the studies. The RHCP gain 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.
- Subjects
ANTENNAS (Electronics); ARTIFICIAL satellite antennas; BANDWIDTH research; ALTITUDES; TELECOMMUNICATION satellites
- Publication
Progress in Electromagnetics Research C, 2013, Vol 40, p229
- ISSN
1937-8718
- Publication type
Article
- DOI
10.2528/pierc13042403