J
J. de Rosny
Researcher at Centre national de la recherche scientifique
Publications - 44
Citations - 1895
J. de Rosny is an academic researcher from Centre national de la recherche scientifique. The author has contributed to research in topics: Antenna (radio) & Reconfigurable antenna. The author has an hindex of 15, co-authored 44 publications receiving 1711 citations. Previous affiliations of J. de Rosny include University of Paris & École Normale Supérieure.
Papers
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Journal ArticleDOI
Time Reversal of Electromagnetic Waves
TL;DR: The first experimental demonstration of time-reversal focusing with electromagnetic waves in a high-Q cavity is reported, with the wave found to converge to its initial source and is compressed in time.
Journal ArticleDOI
Overcoming the diffraction limit in wave physics using a time-reversal mirror and a novel acoustic sink.
J. de Rosny,Mathias Fink +1 more
TL;DR: This work reports the first experimental result obtained with an acoustic sink where a focal spot size of less than 1/14th of one wavelength is recorded.
Posted Content
Reconfigurable Intelligent Surfaces vs. Relaying: Differences, Similarities, and Performance Comparison
M. Di Renzo,Konstantinos Ntontin,Jian Song,Fadil Habibi Danufane,Xuewen Qian,Fotis Lazarakis,J. de Rosny,Dinh-Thuy Phan-Huy,Osvaldo Simeone,Rui Zhang,Merouane Debbah,Geoffroy Lerosey,Mathias Fink,Sergei A. Tretyakov,Shlomo Shamai +14 more
TL;DR: The present paper elaborates on the key differences and similarities between RISs that are configured to operate as anomalous reflectors and relays and illustrates numerical results that highlight the spectral efficiency gains of RISs when their size is sufficiently large as compared with the wavelength of the radio waves.
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Time reversal of wideband microwaves
TL;DR: In this article, a multiantenna time reversal mirror (TRM) has been built for wideband electromagnetic waves in a reverberant room, and the time-reversed wave converges back to its source and focus in both time and space.
Journal ArticleDOI
Theory of the time reversal cavity for electromagnetic fields.
TL;DR: This work derives a general expression of the electric dyadic Green function in a time-reversal cavity based on vector diffraction theory in the frequency domain, and suggests a methodology to design structures generating subwavelength focusing after time reversal.