Inverse scattering of H/sub z/ waves using subscatterer T-matrices

The inverse scattering problem for H/sub z/ waves impinging on two-dimensional dielectric objects is solved. An inverse scattering algorithm called local shape function (LSF) imaging that abandons the standard integral equation model for a T-matrix model is described. With this algorithm, larger objects or higher dielectric contrasts can be resolved compared to the Born-type iterative methods. The improvement in the LSF algorithm arises because the model has a better approximation for the internal field. For simulation, three smooth dielectric profiles have been inverted with the distorted Born iterative method and the LSF algorithm. As expected, the LSF algorithm converges for a larger range of contrasts than the Born-type iterative methods, as large as 5:1 contrasts.<>