Ultra-Wideband Antenna Design For Gpr Application

We have been developing an ultra-wideband antenna design for use in Ground Penetrating Radar<br>applications. Adapted from a patented antenna intended for use in dielectric permittivity well logging (De<br>and Nelson (1992a)), the antenna is small (3cm by 3cm aperture) and has a wide bandwidth (10’s MHz to<br>1 Ghz useable range). Initial tests indicate that the basic antenna is compatible with current commercial<br>digital instruments, although relatively inefficient compared to conventional dipole antennae. Reasonable<br>quality field data were recorded which are comparable to dipole data but lower amplitude. Our ultimate<br>goal is to design a small, wideband antenna with superior insulation from the air half space. Such an<br>antenna is required for GPR site assessments at urban and culturally noisy sites.