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

Carlos David Morales Peña (1) , Christophe Morlaas (1) , Alexandre Chabory (1) , Romain Pascaud (2) , Marjorie Grzeskowiak (3) , Gautier Mazingue (4)

1 ENAC - Ecole Nationale de l'Aviation Civile
2 DEOS - Département Electronique, Optronique et Signal
3 ISAE-SUPAERO - Institut Supérieur de l'Aéronautique et de l'Espace
4 ANYWAVES

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.

Mots clés: RADIATING MODES; UNIAXIAL ANISOTROPIC DIELECTRIC; DIELECTRIC RESONATOR ANTENNA; CIRCULAR POLARIZATION

Domaines: Sciences de l'ingénieur [physics]; Electromagnétisme

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. ⟨10.1049/cp.2019.0713⟩. ⟨hal-02456138v2⟩