Experimental results of a microwave tomography approach applied to a differential measurement configuration

The capabilities of a microwave inverse scattering algorithm for GPR data processing are tested against experimental data gathered by means of a prototypical GPR system. The approach is based on the Born approximation (BA) and exploits a differential contactless measurement configuration. Accordingly, the data are obtained as the difference of the electrical fields gathered at two symmetrical positions with respect to the source location. The use of the differential configuration allows to reduce substantially the mutual direct coupling between the transmitting and receiving parts of the antenna system and this makes it possible to increase power budget of the GPR system.