High-permittivity Cross-Shaped Dielectric Resonator Antenna for Circular Polarization

Abstract — This paper presents a wideband cir-cularly polarized (CP) dielectric resonator antenna (DRA). The thin cross-shaped antenna of high per-mittivity is excited by two orthogonal microstrip lines with 90 ◦ phase difference resulting in circu-lar polarization. The general design principles are proposed in this paper and a commercial full field analysis software, based on Finite-Element-Method (FEM), is employed to fine-tune the proposed an-tenna. The experimental results show a good agree-ment with simulation and demonstrate a broadside CP bandwidth of 13.2%.