B11. Rectangular dielectric resonator transmitarrays

This paper demonstrated the design of a novel transmitarray antenna using rectangular dielectric resonator antenna (RDRA) elements. Two different constructions for the unit cell of the transmitarray are used. The first one consists of two identical RDRA elements on either side of a substrate material. In the second transmitarray, the two RDRA elements on either side of a perfect conducting ground plane are placed and coupled by a rectangular slot. RDRA elements of varying lengths are used to shape the phase of the incoming wave to form a front in the desired direction of propagation and maximize the transmission through the array structure. Using these transmitarray cell elements, a 21×21 transmitarray was designed. The transmitarray is designed for operation at X-band and design frequency is chosen as 11.2 GHz. A transmitting linearly polarized pyramidal horn antenna is used to illuminate one side of the transmitarray. The transmitarray was simulated and optimized using the finite integration technique (FIT) and the results are validated by comparing with that calculated by the finite element method (FEM].