Analysis of a non Electrical Resistive GPR Antenna

Abstract

In order to avoid oscillations in a GPR antenna, logarithmic resistive patterns throughout the arms of the dipoles are used. This consumes the energy generated by the transmitter, but significantly reduces the efficiency of the antenna and of the radar. This work analyses the possible effects of eliminating resistors by simulating the delayed potentials from the electromagnetic equations. The antenna is modelled as a modified transmission line with open end. A new transmitter is required to avoid the generation of new pulse reflections from the antenna arms. With that, the efficiency of the radar would increase and the broadcast electromagnetic pulse would be more symmetrical.