Analysis of The Performance of The NOSM For High Contrast Targets

Yıl 2019, Cilt: 23 Sayı: 2, 224 - 232, 01.04.2019

Mehmet Nuri Akıncı

https://doi.org/10.16984/saufenbilder.471026

Öz

Electromagnetic inverse scattering from high con-
trast scatterers is of special importance, especially in Microwave
Imaging, wherein the recent technology aims to image high
contrast scatterer. To this purpose, this paper presents an analysis
of the performance of the recently proposed microwave imaging
technique of the Near Field Orthogonality Sampling (NOSM)
for the high contrast targets. For this purpose, the indicator of
the NOSM, which is the reduced scattered field, is derived for
an electrically homogeneous circular scatterer, which is centered
around origin. Next, the ratios of the indicator energy densities
inside and outside of the target is defined as a quality metric.
After, the quality metric and its expressions for limiting cases
(i.e. where the electrical parameter of the the target is too
large or too low) are derived in terms of the background’s
and target’s electrical properties. Then, the introduced metric
is computed and plotted for a popular application, which is
microwave imaging of the breast. Obtained results show that
the high contrasts between the target and the background does
not have an important affect on the quality of the reconstructions
of the NOSM.

Anahtar Kelimeler

Near Field Orthogonality Sampling Method, Microwave Imaging

Kaynakça

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