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

Volume

2

fYear

2002

fDate

2-7 June 2002

Firstpage

1143

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2002 IEEE MTT-S International

Conference_Location

Seattle, WA, USA

ISSN

0149-645X

Print_ISBN

0-7803-7239-5

Type

conf

DOI

10.1109/MWSYM.2002.1011850

Filename

1011850