Title :
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
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;
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
DOI :
10.1109/APS.1992.221523
