High resolution RCS imaging in anechoic chamber by introducing a random medium

Abstract : The currently used methods for radar cross section (RCS) measurements at low frequencies encounter several disturbing phenomena, such as the multipath propagation caused by reflections from the walls. Descending in frequency, the thickness of absorbent materials becomes small compared with the wavelength and they are no longer perfectly absorbent. Therefore, the total incident field on the target becomes the sum of the incident wave and the reflected waves from the walls of the chamber. Inspired by time reversal technique which allows spatial and temporal focusing of an electromagnetic wave, the objective of the thesis is to present a novel imaging method in the microwave range which benefits from the spatio-temporal degrees of freedom provided by the transmission through a random medium in order to detect a target with high resolution.
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Stefania Bucuci. High resolution RCS imaging in anechoic chamber by introducing a random medium. Signal and Image processing. Université Rennes 1; Universite de rennes 1, 2017. English. ⟨NNT : 2017REN1S108⟩. ⟨tel-01765346⟩

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