Reflectivity Reconstruction with Planar Wide-Mesh Scanning Adopting Phaseless Near-Field Data: Numerical Validation

This work provides an approach to reconstruct the reflectivity distribution of targets exploiting a reduced set of only amplitude Near-Field (NF) data. A monostatic measurement setup is here considered. The problem of restoring the missing phase information is tackled as a quadratic inverse one. Accordingly, a priori information on the target is taken into account by adopting an effective representation of the unknown reflectivity distribution, thus improving the accuracy and reliability of the phaseless procedure. The non-redundant sampling technique has been applied to the squared amplitude of the NF scattered data to derive a non-conventional plane-rectangular scan. Such a scanning strategy, derived on considering the target as enclosed in a double bowl, results in a reduction of about 93% of the needed NF samples as compared to the standard sampling strategy. The technique is numerically validated.