Localization of metal targets by time reversal of electromagnetic waves - 3D-numerical and experimental study

Mehdi Benhamouche (1) , Laurent Bernard (1) , Mohammed Serhir (2) , Lionel Pichon (1) , Dominique Lesselier (2)

1 LGEP - Laboratoire de génie électrique de Paris
2 DRE - Département de Recherche en Electromagnétisme ; EMG - Département Electromagnétisme - L2S

This paper proposes a criterion for locating obstacles by time reversal (TR) of electromagnetic (EM) waves based on the analysis of the density of EM energy map in time domain. Contrarily to a monochromatic study of the TR, the wide-band approach requires to determine the instant of the wave focus. This enables us to locate the focal spots that are indicative of the positions. The criterion proposed is compared to the inverse of the minimum entropy criterion as used in the literature [X. Xu, E.L. Miller, C.M. Rappaport, IEEE Trans. Geosci. Remote Sens. 41, 1804 (2003)]. An application for the localization of 3D metal targets is proposed using finite integration technique (FIT) as computational tool at the modeling stage. An experimental validation is presented for canonical three-dimensional configurations with two kinds of metal objects.

Keywords: 3-D configurations; Finite Integration Technique; electromagnetics; wave imaging; time reversal

Domains: Engineering Sciences [physics]; Electromagnetism

Mehdi Benhamouche, Laurent Bernard, Mohammed Serhir, Lionel Pichon, Dominique Lesselier. Localization of metal targets by time reversal of electromagnetic waves - 3D-numerical and experimental study. European Physical Journal: Applied Physics, 2013, 64 (2), pp.24512. ⟨10.1051/epjap/2013120439⟩. ⟨hal-00859379⟩