Study on Impedance Matching and Miniaturization of Bow-tie Antenna with Folded Structure and Slit for Ground Penetrating Radar

The antenna of ground penetrating radar (GPR) used for the exploration such as buried objects under rubble at the time of disaster is required to have small size and wideband characteristics. A folded bow-tie antenna is one of the small and wideband antennas. In this paper, we propose a small folded bow-tie antenna loaded on ground plane as an antenna of GPR. The input impedance characteristics of the proposed antenna is adjusted by modifying the shape of feeding part. As a miniaturization of the proposed antenna is considered by loading a slit.