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Single-fed circularly polarized dielectric resonator antenna using a uniaxial anisotropic material

Abstract : A Dielectric Resonator Antenna operating in circular polarization is presented. The proposed antenna is formed by a uniaxial anisotropic dielectric and a ground plane. The optimization of the permittivity tensor and antenna dimensions is performed both theoretically and numerically using an Eigen mode analysis in Ansys HFSS. A good agreement is obtained for the resonant frequencies and quality factors of the different modes. The uniaxial anisotropic DRA radiates two degenerate orthogonal modes, TE111 x and TE111 y , with equal amplitudes and 90° phase difference in order to achieve circular polarization. An impedance bandwidth of 9.8% is accomplished and a broadside radiation pattern with left-hand circular polarization (LHCP) is achieved in simulation. Furthermore, an Axial Ratio (AR) of 0.06 dB at 2.45 GHz and a 3-dB AR bandwidth of 2.04% are obtained. The maximum simulated directivity is equal to 6.56 dBi.
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Submitted on : Monday, January 27, 2020 - 10:45:27 AM
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Carlos David Morales Peña, Christophe Morlaas, Alexandre Chabory, Romain Pascaud, Marjorie Grzeskowiak, et al.. Single-fed circularly polarized dielectric resonator antenna using a uniaxial anisotropic material. APC 2019, The IET Conference on Antennas and Propagation, Nov 2019, Birmingham, United Kingdom. pp.SBN: 978-1-83953-170-5, ⟨10.1049/cp.2019.0713⟩. ⟨hal-02456138⟩

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