Dans cet article, le renversement du temps est utilisé pour engendrer des impulsions micro-ondes de forte amplitude à partir d'un générateur d'ondes arbitraires. Nous utilisons une cavité réverbérante ouverte sur sa face avant et profitons des propriétés de compression d'impulsion du renversement temporel. Des impulsions de fortes amplitudes sont générées à l'extérieur de la cavité grâce à l'étalement temporel des signaux à l'intérieur. L'amplitude ainsi que la largeur de la tache focale des impulsions sont étudiées en fonction des différents paramètres expérimentaux. Un gain de 18 dB par rapport à une antenne directive de même ouverture est obtenu.
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.
@article{CRPHYS_2010__11_1_37_0, author = {Matthieu Davy and Julien de Rosny and Jean-Christophe Joly and Mathias Fink}, title = {Focusing and amplification of electromagnetic waves by time reversal in an leaky reverberation chamber}, journal = {Comptes Rendus. Physique}, pages = {37--43}, publisher = {Elsevier}, volume = {11}, number = {1}, year = {2010}, doi = {10.1016/j.crhy.2009.12.008}, language = {en}, }
TY - JOUR AU - Matthieu Davy AU - Julien de Rosny AU - Jean-Christophe Joly AU - Mathias Fink TI - Focusing and amplification of electromagnetic waves by time reversal in an leaky reverberation chamber JO - Comptes Rendus. Physique PY - 2010 SP - 37 EP - 43 VL - 11 IS - 1 PB - Elsevier DO - 10.1016/j.crhy.2009.12.008 LA - en ID - CRPHYS_2010__11_1_37_0 ER -
%0 Journal Article %A Matthieu Davy %A Julien de Rosny %A Jean-Christophe Joly %A Mathias Fink %T Focusing and amplification of electromagnetic waves by time reversal in an leaky reverberation chamber %J Comptes Rendus. Physique %D 2010 %P 37-43 %V 11 %N 1 %I Elsevier %R 10.1016/j.crhy.2009.12.008 %G en %F CRPHYS_2010__11_1_37_0
Matthieu Davy; Julien de Rosny; Jean-Christophe Joly; Mathias Fink. Focusing and amplification of electromagnetic waves by time reversal in an leaky reverberation chamber. Comptes Rendus. Physique, Volume 11 (2010) no. 1, pp. 37-43. doi : 10.1016/j.crhy.2009.12.008. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2009.12.008/
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