- Sakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi
- Vol: 23 Issue: 2
- Analysis of The Performance of The NOSM For High Contrast Targets
Analysis of The Performance of The NOSM For High Contrast Targets
Authors : Mehmet Nuri AKINCI
Pages : 224-232
Doi:10.16984/saufenbilder.471026
View : 10 | Download : 5
Publication Date : 2019-04-01
Article Type : Other
Abstract :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.Keywords : Near Field Orthogonality Sampling Method, Microwave Imaging