2009•IEEE Transactions on Antennas and PropagationRequires access

A Circularly Polarized Antenna With Wide Axial Ratio Beamwidth

Ka Ming Mak, Kwai‐Man Luk

Abstract

A novel circularly polarized (CP) antenna with wide angular coverage is presented. The proposed antenna is formed by two bowtie patch antennas and two electric dipoles. It can achieve an impedance bandwidth (SWRdegplusmn2degwith a gain of 6.3 dBi plusmn0.3 dBi. The cross polarization is lower than -15 dB over a wide range of angles. For the entire half-power beamwidth, the axial ratio can be kept below 3 dB.

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Key concepts: Beamwidth, Axial ratio, Physics, Optics, Fan-beam antenna, Bandwidth (computing), Circular polarization, Turnstile antenna