QUANTITATIVE MICROWAVE IMAGING WITH A 2.45-GHZ PLANAR MICROWAVE CAMERA

This paper presents microwave tomographic reconstructions of the compl ex permittivity of lossy dielectric objects immersed in water from exp erimental multiview near-field data obtained with a 2.45-GHz planar ac tive microwave camera. An iterative reconstruction algorithm based on the Levenherg-Marquardt method was used to solve the nonlinear matrix equation which results when applying a moment method to the electric f ield integral representation. The effects of uncertainties in experime ntal parameters such as the exterior medium complex permittivity, the imaging system geometry and the incident field at the object location are illustrated by means of reconstructions from synthetic data, It ap pears that the uncertainties in the incident field have the strongest impact on the reconstructions. A receiver calibration procedure has be en implemented and some ways to access to the incident field at the ob ject location have been assessed.