Title :
High-order inversion formulas for low-frequency imaging of 2D buried targets
Author :
Cui, Tie Jun ; Qin, Yao ; Wang, Gong-Li ; Chew, Weng Cho
Author_Institution :
Dept. of Radio Eng., Southeast Univ., Nanjing, China
Abstract :
In this work, new closed-form formulations are derived for the inverse scattering of 2D large-contrast dielectric objects, buried in a lossy earth, using the idea of back-conditioner and lumped-mass approximation. These formulations are also valid to the case of free space. It has been demonstrated that the zeroth-order form of the new approximation is just the well-known Born approximation, and the first-order form is completely equivalent to the quasi-linear approximation. Hence, high-order approximations are proposed in this work for the imaging of buried objects in lossy earth. Reconstruction examples show the validity and efficiency of these formulations.
Keywords :
absorbing media; buried object detection; electromagnetic wave scattering; image reconstruction; inverse problems; 2D buried targets; 2D large-contrast dielectric objects; 5 MHz; Born approximation; back-conditioner; buried object imaging; free space inverse scattering; high-order inversion formulas; image reconstruction; inverse scattering; lossy earth; low-frequency imaging; lumped-mass approximation; quasi-linear approximation; Approximation methods; Buried object detection; Computational electromagnetics; Dielectric losses; Earth; Image reconstruction; Integral equations; Inverse problems; Reflectivity; Scattering;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2004. IEEE
Print_ISBN :
0-7803-8302-8
DOI :
10.1109/APS.2004.1329591
