Title :
An improved iterative method for inverse scattering
Author :
Liu, Y. ; Ciric, L.R.
Author_Institution :
Dept. of Electr. & Comput. Eng., Manitoba Univ., Winnipeg, Man., Canada
Abstract :
A new iterative method for microwave imaging, based on the Born approximation, is presented. The permittivity profile is reconstructed from the equivalent current density by using an optimised object function at each iteration step. This method provides more accurate results, with improved numerical stability and rate of convergence of the iteration process, and with practically the same computational effort. An illustrative example of numerical calculation is given for the two-dimensional TM inverse scattering in the case of an inhomogeneous dielectric cylinder.
Keywords :
approximation theory; current density; dielectric materials; electromagnetic wave scattering; inverse problems; iterative methods; microwave imaging; numerical stability; permittivity; Born approximation; convergence rate; equivalent current density; inhomogeneous dielectric cylinder; inverse scattering; iterative method; microwave imaging; numerical stability; optimised object function; permittivity profile reconstruction; two-dimensional TM inverse scattering; Approximation methods; Current density; Image reconstruction; Inverse problems; Iterative methods; Microwave imaging; Microwave theory and techniques; Numerical stability; Permittivity; Scattering;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1994. AP-S. Digest
Conference_Location :
Seattle, WA, USA
Print_ISBN :
0-7803-2009-3
DOI :
10.1109/APS.1994.408133
