Microwave Imaging of a Slightly Varying 2-D Conducting Object Through Generalized Impedance Boundary Conditions

ASLANYÜREK B., ŞAHİNTÜRK H., Çayören M.

IEEE GEOSCIENCE AND REMOTE SENSING LETTERS, vol.11, no.11, pp.1851-1855, 2014 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 11 Issue: 11
  • Publication Date: 2014
  • Doi Number: 10.1109/lgrs.2014.2311837
  • Journal Name: IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1851-1855
  • Keywords: Generalized impedance boundary conditions (GIBCs), inverse scattering problems, shape reconstruction, SHAPE RECONSTRUCTION, SCATTERING, TARGETS
  • Yıldız Technical University Affiliated: Yes

Abstract

We consider reconstructing the shape of a perfect electric conducting object and developed a novel imaging method based on generalized impedance boundary conditions (GIBCs). The method relies on selecting a fictitious surface encircling the unknown object in which the surface impedance is reconstructed from the scattered field measurements. Later, the shape reconstruction problem is cast into an equivalent problem where the distance variation between the fictitious impedance surface and the unknown target is determined from the reconstructed surface impedance. Since the performance of the method depends on the selection of the impedance surface, we present a selection criterion according to the validity conditions of GIBCs. The method is capable of reconstructing both convex and concave structures whose shape deviates, at most, a tenth of the wavelength from the impedance surface, as demonstrated with numerical results.