Radioengineering (Apr 2014)

A New Wideband Circularly Polarized Dielectric Resonator Antenna

  • M. Khalily,
  • M. R. Kamarudin,
  • M. Mokayef,
  • Sh. Danesh,
  • S. E. A. Ghahferokhi

Journal volume & issue
Vol. 23, no. 1
pp. 175 – 180

Abstract

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A wideband and compact circularly polarized (CP) C-shaped dielectric resonator antenna (DRA) is presented. The proposed C-shaped DR is excited by a simple stripe line connected to a coplanar waveguide (CPW) feeding line. The C-shaped DRA is circularly polarized with 19% axial ratio (AR) bandwidth. It is found that the CP bandwidth can be expanded by using a narrow short circuit strip. The final design achieves CP with 50% AR bandwidth. The proposed circularly polarized DRA (CPDRA) with good radiation characteristics offers an impedance bandwidth of 58% between 3.45 and 6.26 GHz for VSWR ≤ 2. The proposed DRA is fabricated and tested. Very good agreement between simulated and measured results is obtained.

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