Higher order mode circularly polarized two-layer rectangular dielectric resonator antenna

A two-layer higher order mode circularly polarized (CP) rectangular dielectric resonator antenna (RDRA) is proposed at a frequency range of 10 to 13GHz using a single-feed. The configuration incorporates the DRA and a dielectric coat layer with respective dielectric constants of 10 and 3.5. Utilizing the outer layer offers a number of advantages such as wider impedance and CP bandwidths of ∼21%, and 9.5%, respectively, as well as a high gain of ~11dBic. Close agreement has been achieved between experimental and simulated results.