TIME DOMAIN MODELLING OF UWB GPR AND ITS APPLICATION ON LANDMINE DETECTION

In this paper, the time domain modelling of an indoor impulse UWB GPR systems (1GHz-5GHz), built in the scope of the HUDEM project, is presented. For an impulse UWB system, a time-domain modelling is an obvious choice. We explain how the antennas can be characterised by their normalised impulse response. By considering the antenna as a convolution operator, we get a mechanism for modelling the whole radar system as a cascade of linear responses, which gives a lot of advantages and possible application. In our research it is used to express the radar range equation in the time-domain, to optimise the antenna configuration and to calculate the point-spread function of the UWB GPR at a given depth. The pointspread function can be used for migration by deconvolving it from the collected data. In this way the migration method takes into account the characteristics of the radar system. Finally, results of this migration method on data obtained by our UWB GPR system are shown.