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A Novel Ultrawideband Gear-Shaped Dielectric Ring Resonator Antenna

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  • Mehdi Ghorbani
  • Habib Ghorbaninejad

Abstract

In this study, a novel ultrawideband (UWB) dielectric ring resonator (DRR) antenna has been proposed. DRR antennas include a single monopole antenna in the center of a ground plane and a dielectric with a symmetric structure around the monopole. This structure will lead to ultrawide band antenna. However, it is still possible to enhance the antenna bandwidth. In this study, we combine the DRR structure with an array antenna. The proposed antenna includes a circular array of four triangle resonators, which is rotated around the center of the triangle base to form a gear-shaped ring resonator antenna. In this design, characteristics of all these antennas are combined to enhance the antenna bandwidth including triangular dielectric resonator, circular array antenna, dielectric ring resonator structure, and a quarter-wave electric monopole. Triangular dielectric resonator antennas are wideband and in small size. Ring resonator antennas are inherently ultrawideband. Quarter-wave electric monopole and circular array structure can also enhance antenna bandwidth. This novel shape of the DRR antenna possesses the wider impedance bandwidth compared to similar works. Impedance bandwidth is 150% (5.2–36.1 GHz), and the bandwidth ratio is 1 : 6.9, which is much greater than earlier reports.

Suggested Citation

  • Mehdi Ghorbani & Habib Ghorbaninejad, 2021. "A Novel Ultrawideband Gear-Shaped Dielectric Ring Resonator Antenna," Mathematical Problems in Engineering, Hindawi, vol. 2021, pages 1-8, July.
    • Handle: RePEc:hin:jnlmpe:8069873
    DOI: 10.1155/2021/8069873
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