Analysis and design of directive antenna array using parasitic dielectric resonators

We investigate the design of Yagi-array made of parasitic dielectric spheres excited by a simple dipole to operate in the infrared range of wavelengths. Each dielectric sphere acts as a magnetic dipole near to the resonant frequency of the TE01 mode. The idea is also extended to the microwave range of frequencies utilizing an array of dielectric resonators on a microstrip structure. Analytical as well as simulation studies are carried out and the results verify the feasibility of achieving a directive array over a certain bandwidth. The so designed array proves to have compact size in comparison with the conventional wire Yagi array.