AN IMPROVED METHOD FOR THE RECONSTRUCTION OF LOSSY DIELECTRIC OBJECTS

In this article we present a modified version of the time-domain disto rted Born iterative method (TDDBIM), based on the frequency-compensati ng technique (FCT), for the reconstruction of lossy dielectric objects . The FCT is applied to improve the ill-posed characteristics of the i nverse problems and to speed up the convergence of the TDDBIM. Numeric al results for the reconstruction of two-dimensional lossy objects sho w that the algorithm is very effective in improving the rate of conver gence of the TDDBIM. Furthermore, the modified algorithm performs well even in the presence of a 20-dB signal-to-noise ratio and does not im pose an additional burden on the CPU. (C) 1997 John Wiley & Sons, Inc.