A distributions-based approach to image strong scatterers from PO data

The reconstruction of the shape of 2-d ”strongly scattering” objects from the knowledge of the scattered electric field under the incidence of TM plane waves with varying frequency and fixed angle of incidence is investigated. With reference to perfectly conducting cylinders, the provided formulation accommodates the distribution nature of the induced surface current density. Thus, as unknown representing the objects’ contour, a single layer distribution is chosen so that the boundary of the scatterers is described by its support. The nonlinear unknown-data mapping is linearized by means of the Kirchhoff approximation and the inversion is performed by the SVD approach.