(IMPACT OF PROPAGATION ON ANTENNAS DESIGN FOR GROUND PENETRATING RADAR (GPR

Abstract

In this thesis, a study for the impact of propagation on antennas for Ground Penetrating Radar (GPR) is done, a novel Ultra-wideband Willis-Sinha Tapered Slot antenna for landmine detection using Ground Penetrating Radar (GPR) system with enhanced gain and directivity is presented. The structure is constructed on FR4 dielectric substrate which is low cost material. The antenna is fed by novel tapered coplanar waveguide (CPW) to coplanar strips (CPS) transition feed. The antenna’s impedance bandwidth is extended by adding an antenna arm constructing parabola shape with the antenna element. The antenna has a corrugated structure along the antenna outer edges to improve radiation efficiency and get higher directivity. Also, mushroom like circular EBG structure is used in the lower side of the antenna arm to reduce interference and enhance front-to-back ratio (F/B ratio). A partially substrate removal like circular cylinders inside the substrate are aligned with the antenna tapered profile to obtain better radiation efficiency and enhance antenna gain