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1 results

  • A corrugated G-shaped grounded ring slot antenna for wideband circular polarization

  • Kapil Saraswat, Trivesh Kumar, A. R. Harish
  • Journal:
    International Journal of Microwave and Wireless Technologies / Volume 12 / Issue 5 / June 2020
    Published online by Cambridge University Press:
    23 January 2020, pp. 431-436

  • In this paper, a wideband circularly polarized corrugated G-shaped grounded ring slot antenna is presented. The proposed antenna structure is excited using a coplanar waveguide-fed monopole antenna, which is placed inside a corrugated G-shaped grounded ring. Due to the asymmetry in the ground plane, two orthogonal modes, having equal magnitude and out of phase by 90° are excited, resulting in circular polarization (CP). The generation of the CP in the proposed antenna structure is explained using thin dipole current element approximation. A prototype of the proposed antenna is fabricated and tested. The measured results exhibit a 3 dB axial ratio bandwidth of 37.6% (2.22–3.25 GHz), and reflection coefficient bandwidth (|S11| ≤ −10 dB) of 47.91% (2.13–3.47 GHz). Additionally, the design guidelines are also presented for G-shaped grounded ring slot antennas.