Polynomial characterization of inhomogeneous media and their reconstruction using an open-ended waveguide

B. Sanadiki and M. Moustafavi (1991) described how an inhomogeneous continuously varying dielectric profile can be inverted using a stepwise successive refinement procedure when an open-ended waveguide is used as the source. Here, an alternative approach based on polynomial characterization of the dielectric medium is discussed. It is shown that this method is more efficient and avoids the convergence difficulties of the previous method for most cases except for discontinuous or stratified profiles