Inverse scattering of Hz waves using local shape‐function imaging: A T‐matrix formulation

Gregory P. Otto, Weng Cho Chew

Research output: Contribution to journalArticlepeer-review


Inverse scattering algorithms for Hz polarized waves are scarce, due to the added difficulties of polarization charges. Nevertheless, the polarization charges cannot be ignored for 3D problems as well as for 2D Hz problems. This work aims to reconstruct arbitrary inhomogeneous dielectric objects from Hz scattering data using a new formulation that abandons the standard integral equation model for a T‐matrix model. This new algorithm, called local shape‐function (LSF) imaging, is modified for dielectric objects with Hz incident fields, where previously the LSF algorithm was applied to metallic objects with Ez incident fields. The advantage of the LSF algorithm is a more accurate modeling of the induced interfacial polarization charges. For comparison, the Hz distorted Born iterative method using integral equations is shown to be valid only for small contrasts, while the LSF algorithm converges for much larger dielectric contrasts.©1994 John Wiley & Sons Inc

Original languageEnglish (US)
Pages (from-to)22-27
Number of pages6
JournalInternational Journal of Imaging Systems and Technology
Issue number1
StatePublished - 1994
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Software
  • Computer Vision and Pattern Recognition
  • Electrical and Electronic Engineering


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