Directive Dielectric Resonator Antenna

Abstract

Relatively directive, single element, linearly polarized, dielectric resonator antenna for the ISM band applications (5.8 GHz) is presented in the paper. Its operation is based on the excitation of higher order modes inside a cylindrical dielectric resonator antenna of low relative permittivity material (εr= 6.15) fed by an aperture coupled microstrip line. The behavior of the mode properties inside the resonator is studied and geometry providing maximum gain is determined. Measurement results are given and compared with simulations results obtained in CST Microwave Studio in order to confirm the correct operation of the antenna.