C. Pichot et al., MICROWAVE INVERSE SCATTERING - QUANTITATIVE RECONSTRUCTION OF COMPLEXPERMITTIVITY FOR DIFFERENT APPLICATIONS, IEICE transactions on electronics, E80C(11), 1997, pp. 1343-1348
This paper deals with two different quantitative inversion algorithms
for reconstructing the complex permittivity profile of bounded inhomog
eneous objects from measured scattered field data. The first algorithm
involves an imaging method with single frequency excitation and multi
incidence illumination and the second algorithm involves a method with
synthetic pulse (multifrequency mode) excitation for objects surround
ed by free-space or buried in stratified half-space media. Transmissio
n or reflection imaging protocols are considered depending on aimed ap
plications : microwave imaging in free-space from far-field data for t
arget identification, microwave imaging from near-field data for nonde
structive testing (NDT), microwave tomography of buried objects for mi
ne detection and localization, civil engineering and geophysical appli
cations. An Edge-Preserving regularization scheme leading to a signifi
cant enhancement in the image reconstructions is also proposed. The me
thods are illustrated with synthetic and experimental data.