MATCHING LAYER DESIGN PROCEDURE FOR A NOVEL BROADBAND DIELECTRIC LENS ANTENNA

Abstract

Dielectric lens antennas fabricated with a dense dielectric material allows good power transfer efficiency through the lens and improves the front to back radiation ratio of the antenna. On the other hand, using dense dielectric material in fabrication of a dielectric lens antenna causes deterioration in the radiation properties of the antenna. These undesirable effects due to the internal reflections can be reduced using matching layers (ML) at the top of the antenna. In this work, a quarter wavelength ML design procedure for a novel ultra wide band (UWB) dielectric lens antenna is proposed. It is exhibited that the lateral wave antenna concept promises impedance matching over factor one to three bandwidth, very high efficiency, and high directivity in one plane thanks to the appropriate MLs coated to the top of the antenna. The radiation patterns of the antenna are simulated using the software computer simulation technology (CST). The simulation results verify that MLs designed by quarter-wavelength matching technique improves the radiation characteristics of an UWB antenna