Focusing and amplification of electromagnetic waves by time reversal in an leaky reverberation chamber

被引：27

作者：

Davy, Matthieu ^{[1
]}

de Rosny, Julien ^{[1
]}

Joly, Jean-Christophe ^{[2
]}

Fink, Mathias ^{[1
]}

机构：

[1] ESPCI ParisTech, CNRS, UMR 7587, Inst Langevin,Lab Ondes & Acous, F-75231 Paris 05, France

[2] Ctr Etud Gramat, F-46500 Gramat, France

来源：

COMPTES RENDUS PHYSIQUE | 2010年 / 11卷 / 01期

关键词：

Time reversal; Reverberation cavity; Focal spot; Gain;

D O I：

10.1016/j.crhy.2009.12.008

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In this article, time reversal is used to generate high power microwave pulses from a low power arbitrary wave generator. We use a reverberation chamber with an aperture on the front face and we take advantage of the pulse compression property of time reversal. High amplitude peaks are generated outside the chamber thanks to the long spreading time of the signals inside. We study the amplitude of this peak and the width of the focal spot with respect to the different experimental parameters. A gain of 18 dB compared to a directive antenna of the same aperture is obtained. (C) 2010 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.

引用

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页码：37 / 43

页数：7

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