Effect of multiple scattering on resolution in inversion using the Born iterative method

Author

Moghaddam, M. ; Chew, W.C.

Author_Institution

Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA

fYear

1992

fDate

18-25 June 1992

Abstract

Summary form only given. It was shown that the ability to account for multiple scattering is the reason behind the high resolution in the Born iterative method (BIM). Examples were considered comparing the results of a linear algorithm and BIM for resolution of two objects separated by 0.1 lambda : in the linear solution, the objects are not resolved and the contrasts not recovered; in the BIM solution, the two objects are resolved increasingly well as more iterations are performed. An analysis was also carried out to prove that the evanescent spectrum does not contribute significantly to the scattered fields measured by the receivers, and hence is not responsible for the enhanced resolution. This further confirms the role of multiple scattering and the subsequent mode conversions in obtaining high resolution.<>

Keywords

electromagnetic wave scattering; inverse problems; iterative methods; Born iterative method; evanescent spectrum; high resolution; inverse scattering problem; inversion; linear algorithm; mode conversions; multiple scattering; receivers; scattered fields; Drives; Electromagnetic launching; Electromagnetic scattering; Image reconstruction; Integral equations; Inverse problems; Iterative methods; Laboratories; Optimization methods; Remote sensing;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 1992. AP-S. 1992 Digest. Held in Conjuction with: URSI Radio Science Meeting and Nuclear EMP Meeting., IEEE

Conference_Location

Chicago, IL, USA

Print_ISBN

0-7803-0730-5

Type

conf

DOI

10.1109/APS.1992.221523

Filename

221523