A low loss reflectarray element based on a dielectric resonator antenna (DRA) with a parasitic strip

A strip-loaded DRA has been proposed as a promising reflectarray element in Ka-band. Varying the length of the strip enables one to adjust the phase of each DRA cell. A phase variation of 320deg and low loss (less than 0.6dB) are achieved at 30 GHz. This concept has been checked experimentally in C-band. It was also demonstrated that the DRA structure exhibits much better performance compared to the so called dasiafull substratepsila configuration.