Title :
A new 2-D image reconstruction algorithm based on FDTD and design sensitivity analysis
Author :
No-Weon Kang ; Young-seek Chung ; Changyul Cheon ; Hyun-Kyo Jung
Author_Institution :
Sch. of Electr. Eng., Seoul Nat. Univ., South Korea
Abstract :
In this paper, we propose a numerical algorithm to reconstruct the complex permittivity profile of unknown scatterers by using the FDTD technique and design sensitivity analysis (DSA). By introducing DSA and the adjoint variable method, we can calculate the derivatives of error functions with respect to complex permittivity variables, and reduce the computational cost. The proposed method is validated by application to the reconstruction of unknown 2-D scatterers which are illuminated by TM/sup 2/ with a Gaussian pulsed plane wave.
Keywords :
electromagnetic wave scattering; finite difference time-domain analysis; image reconstruction; microwave imaging; optimisation; permittivity measurement; sensitivity analysis; 2-D image reconstruction algorithm; FDTD; Gaussian pulsed plane wave; adjoint variable method; complex permittivity profile; design sensitivity analysis; error function derivatives; microwave imaging; numerical algorithm; topology optimization; unknown 2-D scatterers; unknown scatterers; Algorithm design and analysis; Computational efficiency; Dielectric measurements; Finite difference methods; Image reconstruction; Light scattering; Maxwell equations; Permittivity measurement; Sensitivity analysis; Time domain analysis;
Conference_Titel :
Microwave Symposium Digest, 2002 IEEE MTT-S International
Conference_Location :
Seattle, WA, USA
Print_ISBN :
0-7803-7239-5
DOI :
10.1109/MWSYM.2002.1011850
