Two-dimensional FDTD inverse-scattering scheme for determination of near-surface material properties at microwave frequencies

Milica Popović*, Allen Taflove

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

This paper reports a two-dimensional time-domain inverse-scattering algorithm based upon the finite-difference time-domain method for determining near-surface material properties at microwave frequencies. The time-domain nature of this technique allows for limiting the region of inversion using causality. The algorithm traces a search trajectory in the (εr, σ) parameter space. The minimal parameter estimation error along this trajectory yields a set of approximate parameter values. It is shown that the algorithm's convergence and robustness with respect to broad- band Gaussian noise depends on the shape and the duration of the illuminating electromagnetic wave pulse chosen for the electrical parameter reconstruction. It is possible to achieve an unambiguous indication of algorithm convergence despite the noisy background.

Original languageEnglish (US)
Pages (from-to)2366-2373
Number of pages8
JournalIEEE Transactions on Antennas and Propagation
Volume52
Issue number9
DOIs
StatePublished - Sep 2004

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Two-dimensional FDTD inverse-scattering scheme for determination of near-surface material properties at microwave frequencies'. Together they form a unique fingerprint.

Cite this