On a wideband circularly polarized dielectric resonator antenna using a higher-order mode

A strip-fed wideband circularly polarized (CP) dielectric resonator antenna (DRA) is investigated in this paper. The wideband design makes use of the quasi-TE₁₁₁ and -TE₁₁₃ modes of the rectangular DRA. To generate CP fields, two opposite corners of the rectangular DRA are truncated at 45°. A groove and two parasitic strips are introduced to tune the axial ratio (AR) of the antenna. Measured results show that a wide AR bandwidth of 16.3 % can be achieved. The reflection coefficient, AR radiation pattern, and antenna gain of the DRA are studied using ANSYS HFSS. Reasonable agreement between the measured and simulated results is observed.