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Keywords:

  • circularly polarized antenna;
  • Γ-shaped feed;
  • impedance bandwidth;
  • axial ratio bandwidth

Abstract

A wideband circularly polarized antenna with Γ-shaped feed is presented.The proposed antenna is formed by two shorted bowtie patch antennas and two L-shaped electric dipoles. It can achieve a measured impedance bandwidth for voltage standing wave ratio (VSWR) ≤ 1.5 of 52% and a 3-dB axial ratio bandwidth of 55%. For the entire half-power beamwidth, the axial ratio can be kept below 3 dB. A prototype has been fabricated and tested, and the experimental results validate the design procedure. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:153–156, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26503