Electromagnetic imaging of 2-D inhomogeneous dielectric objects by an improved spectral inverse technique

Author

Kim, Se-Yun ; Choi, Hyun-Chul ; Ra, Jung-Woong ; Lee, Soo-Young

Author_Institution

Div. of Appl. Phys. & Electron., Korea Inst. Sci. & Technol., Seoul, South Korea

Volume

26

Issue

2

fYear

1990

fDate

3/1/1990 12:00:00 AM

Firstpage

634

Lastpage

637

Abstract

Recent developments in the numerical analysis of inverse scattering problems are reviewed. Derivations are given of inverse scattering algorithms formulated in the configuration and the spectral domains by using moment-method procedures for forward scattering problems in the reverse sequence. Compared with the inversion algorithm in the configuration domain, the separation of physical parameters involved in the spectral inverse scattering formulation helps to find proper regularization methods for the reduction of the noise effect. Fourier series expansion with respect to the field distribution and averaging process in each enlarged cell provides excellent noise reduction performance

Keywords

Fourier analysis; computerised picture processing; computerised tomography; inverse problems; medical diagnostic computing; microwave imaging; spectral analysis; Fourier series expansion; averaging process; configuration domain; electromagnetic imaging; enlarged cell; field distribution; ill posedness; image reconstruction; inhomogeneous dielectric objects; inverse scattering algorithms; inverse scattering problems; moment-method procedures; noise effect; noise reduction performance; regularization methods; separation of physical parameters; spectral inverse technique; two dimensional objects; Dielectrics; Electromagnetic scattering; Fourier series; Inverse problems; Moment methods; Noise reduction; Numerical analysis; Physics; Pollution measurement; Spatial resolution;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.106397

Filename

106397