Experimental microwave imaging of three-dimensional targets with different inversion procedures

We consider an experimental microwave imaging system in which the targets are illuminated under various angles of incidence and the scattered field is measured on a sphere surrounding them. We estimate the map of relative permittivity of the objects from the scattered field with an iterative inversi...

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Bibliographic Details
Published in:Journal of applied physics 2009-08, Vol.106 (3)
Main Authors: Chaumet, P. C., Belkebir, K., Sentenac, A.
Format: Article
Language:English
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Summary:We consider an experimental microwave imaging system in which the targets are illuminated under various angles of incidence and the scattered field is measured on a sphere surrounding them. We estimate the map of relative permittivity of the objects from the scattered field with an iterative inversion procedure based on a conjugate gradient technique. We derive several formulations of the inversion algorithm and analyze their efficiency on three different targets. We observe that including a priori information on the lower and upper bounds of the permittivity of the sample leads to a spectacular improvement of the resolution of the image.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.3183939