Experimental validation of Radio Frequency Tomography for an inhomogeneous medium

Experimental tests to validate Radio Frequency Tomography (RFT) in the case of an inhomogeneous scenario are reported in this work. The experiments dealt with the imaging of objects buried in a box surrounded by air and filled with sand or gravel. RFT is based on the linear model provided by Born approximation and assumes that multiple transmitters and receivers surround the structure under investigation. The model here adopted accounts for the Green's function of the inhomogeneous medium, which is evaluated numerically by a commercial computational electromagnetic software based on the Method of Moments. Reconstruction results highlight the performance and practical limitations of the RFT approach.