Title :
Reconstruction of Two-Dimensional Permittivity Distribution With Distorted Rytov Iterative Method
Author :
Zhang, Wenji ; Hoorfar, Ahmad
Author_Institution :
Antenna Res. Lab., Villanova Univ., Villanova, PA, USA
fDate :
7/3/1905 12:00:00 AM
Abstract :
The distorted Rytov iterative method (DRIM) is proposed for the reconstruction of the unknown dielectric objects embedded in two-dimensional (2-D) homogeneous space. The DRIM is based on the distorted-wave Rytov approximation and is solved iteratively by incrementally correcting the estimated contrast function in each iteration step. The background medium Green´s function is calculated numerically and is updated in each iteration step. Experimental and numerical results are presented to validate the proposed method for 2-D permittivity distribution reconstruction for both lossless and lossy cases.
Keywords :
Green´s function methods; electromagnetic wave scattering; iterative methods; permittivity; 2D homogeneous space; 2D permittivity distribution reconstruction; background medium Green´s function; contrast function estimation; distorted Rytov iterative method; distorted-wave Rytov approximation; electromagnetic inverse scattering; two-dimensional permittivity distribution reconstruction; unknown dielectric object reconstruction; Approximation methods; Dielectrics; Image reconstruction; Imaging; Inverse problems; Iterative methods; Permittivity; Electromagnetic inverse scattering; Green´s function; distorted Rytov iterative method (DRIM); distorted-wave Rytov approximation;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2011.2169643
