Centre National De La Recherche Scientifique

Time Reversal Communications

Greenerwave

Ecole Suprerieure De Physique Et De Chimie Industrielles De La Ville De Paris

Ecole Superieure De Physique Et De Chimie Industrielles De La Ville De Paris

Centre National De La Recherche Scientifique-cnrs

Avantix

Fabrice Lemoult

Mathias Fink

Geoffroy Lerosey

Julien De Rosny

Arnaud Tourin

Alexandre Aubry

Timmy Floume

Christian Leray

Ourir Abdel Waheb

Ourir Abdelwaheb

A communication network includes an access point, a control unit in communication with the access point, a wave shaping device in communication with the control unit, and a wireless communication device. The control unit determines parameters of the wave shaping device, the parameters being search parameters if the control unit does not receive a pilot signal, and optimization parameters if the control unit receives a pilot signal.

Communication network access point, communication network, and method of wireless communication

A device () for receiving and/or emitting an electromagnetic wave, comprising a medium () of dielectric material, a plurality of passive resonant elements () incorporated inside said medium, the plurality of passive resonant elements () comprising a frequency band-gap, two neighbor passive resonant elements belonging to the plurality being spaced apart from each other of a first distance lower than &#x3bb;/4, and at least one active resonant element () incorporated inside said plurality, said active resonant element () having a second structure different from a first structure of the passive resonant elements (), so that said active resonant element () has at least a second resonance frequency comprised inside the frequency band-gap of said plurality of passive elements ().

Device for receiving and/or emitting a wave, a system comprising the device, and use of such device

A system for illuminating an object with a wave or for imaging an object with a wave comprises a lens, a plurality of transducers and a control unit connected to the plurality of transducers. The lens comprises a plurality of resonator elements incorporated inside a medium and is able to convert a near field wave of the lens to a far field wave, or reciprocally. The resonator elements are at a sub wavelength distance from each others. The control unit provides signals to the transducers so that a plurality of points on the object are illuminated as desired, or obtains signals from the transducers to build an image of a plurality of points of the object. The points are at sub wavelength distance from each others.

System for illuminating an object with a wave or for imaging an object with a wave

A device for receiving and/or emitting an electromagnetic wave having a free space wavelength &#x3bb;comprised between 1 mm and 10 cm, comprising a medium () of solid dielectric material and the free space wavelength &#x3bb;corresponding to a wavelength &#x3bb; inside the medium, a plurality of conductor elements () incorporated inside the medium and spaced apart from each other of a distance lower than &#x3bb;/10, and one antenna element (). The conductor elements form small loop elements. A tuned conductor element among the conductor elements has a first end at a distance from the antenna element which is lower than &#x3bb;/10, and has an electric resonance frequency corresponding to the wavelength &#x3bb;.

Device for receiving and/or emitting an electromagnetic wave, system comprising said device, and use of such device

A device for receiving and/or emitting an electromagnetic wave having a free space wavelength &#x3bb;comprised between 1 mm and 10 cm, comprising a medium () of solid dielectric material and the free space wavelength &#x3bb;corresponding to a wavelength &#x3bb; inside the medium, a plurality of conductor elements () incorporated inside the medium and spaced apart from each other of a distance lower than &#x3bb;/10, and one antenna element (). The conductor elements are not loop elements. A tuned conductor element among the conductor elements has a first end at a distance from the antenna element which is lower than &#x3bb;/10, and has a length Hadapted to generate an electromagnetic resonance in the tuned conductor element corresponding to the wavelength &#x3bb;.

Growing community of inventors

Paris, France

Fabrice Lemoult