Title :
Image reconstruction from TE scattering data using equation of strong permittivity fluctuation
Author :
Ma, Jianglei ; Cho Chew, Weng ; Lu, Cai-Cheng ; Song, Jiming
Author_Institution :
Dept. of Electr. & Comput. Eng., Illinois Univ., Urbana, IL, USA
fDate :
6/1/2000 12:00:00 AM
Abstract :
Compared to the TM case, the inverse scattering problem for the TE incident field is more complicated due to its stronger nonlinearity. This work provides an effective method for the reconstruction of two-dimensional (2-D) inhomogeneous dielectric objects from TE scattering data. The algorithm applies the distorted Born iterative method to the integral equation of strong permittivity fluctuation to reconstruct scatterers with high-permittivity contrast. Numerical simulations are performed and the results show that the distorted Born iterative method (DBIM) for strong permittivity fluctuation (SPF-DBIM) converges faster and can obtain better reconstructions for objects with larger dimensions and higher contrasts in comparison with ordinary DBIM. A frequency hopping technique is also applied to further increase the contrast
Keywords :
electromagnetic wave polarisation; electromagnetic wave scattering; image reconstruction; integral equations; inverse problems; iterative methods; numerical analysis; permittivity; 2D inhomogeneous dielectric objects reconstruction; TE incident field; TE polarization; TE scattering data; direct scattering solution; distorted Born iterative method; frequency hopping; high-permittivity contrast; image reconstruction; integral equation; inverse scattering problem; inverse scattering solution; microwave imaging; nonlinearity; numerical simulations; strong permittivity fluctuation equation; Dielectrics; Fluctuations; Image reconstruction; Inverse problems; Iterative methods; Nonlinear equations; Permittivity; Scattering; Tellurium; Two dimensional displays;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
