Experimental 3D imaging of metallic small spheres by a linear distributional approach

The problem of determining the number and the locations of ”small” metallic spheres from scattered field measurements is addressed. The problem is casted as the inversion of a linear integral operator by means of the distributional approach based on truncated singular value decomposition (TSVD). The performance of the inversion scheme are analyzed for the case of a multi-view/single-frequency configuration by exploiting experimental scattered field data collected in controlled conditions at the Electromagnetic Diagnostics Laboratory of the Second University of Naples.