An improved renormalization technique for profile inversion

An accurate and efficient method for inverting the permittivity profile of a half space medium illuminated by TEM, TE or TM polarized waves is presented. It is based on an improved renormalization technique and an accurate numerical transform in conjunction with a revised version of the non-linear Riccati differential equation describing the direct problem. A known permittivity profile has been used to generate reflection coefficient data, which have then been used in conjunction with our proposed technique to reconstruct the permittivity profile. A deviation of a maximum of 2% could be easily achieved between original and reconstructed profiles.