Near-field inverse scattering for 2D target profile reconstruction

An iterative inverse algorithm of 2D Finite-Element Boundary-Integral (FE-BI) model is proposed for target profile reconstruction in near-field penetration sensing. It is based on the Jacobian matrix of measurements vs. unknown permittivity which can be explicitly derived from the FE-BI formulation. It uses synthetic aperture radar imaging result as an initial guess and confines the unknown region to a localized area around strong scatter. Although the algorithm is targeted for realistic applications such as underground target recognition, its potential is demonstrated via much simplified simulation and experiment. Preliminary results show that the target shape and size can be identified.