Patents by Inventor Julien De Rosny
Julien De Rosny has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11843444Abstract: The present invention relates to an ambient backscattering communication system (14), the communication system (14) comprising: an ambient backscattering transmitter (16) suitable for generating an ambient backscattering signal according to a first polarization from an ambient signal incident on the transmitter (16), an ambient backscattering receiver (18) suitable for detecting the ambient backscattering signal transmitted by the ambient backscattering transmitter according to a second polarization, and a reduction device (22) for reducing the interference between the ambient backscattering signal and an ambient signal incident on the receiver, the reduction device (22) controlling the first polarization and the second polarization and wherein at least one of said first and second polarizations is adjustable.Type: GrantFiled: December 17, 2019Date of Patent: December 12, 2023Assignees: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, ECOLE SUPERIEURE DE PHYSIQUE ET DE CHIMIE INDUSTRIELLES DE LA VILLE DE PARISInventors: Julien De Rosny, Dinh-Thuy Phan-Huy, Nissem Selmene
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Publication number: 20220052752Abstract: The present invention relates to an ambient backscattering communication system (14), the communication system (14) comprising: an ambient backscattering transmitter (16) suitable for generating an ambient backscattering signal according to a first polarization from an ambient signal incident on the transmitter (16), an ambient backscattering receiver (18) suitable for detecting the ambient backscattering signal transmitted by the ambient backscattering transmitter according to a second polarization, and a reduction device (22) for reducing the interference between the ambient backscattering signal and an ambient signal incident on the receiver, the reduction device (22) controlling the first polarization and the second polarization and wherein at least one of said first and second polarizations is adjustable.Type: ApplicationFiled: December 17, 2019Publication date: February 17, 2022Inventors: Julien DE ROSNY, Dinh-Thuy PHAN-HUY, Nissem SELMENE
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Patent number: 9614288Abstract: A device (10) for receiving and/or emitting an electromagnetic wave, comprising a medium (11) of dielectric material, a plurality of passive resonant elements (12) incorporated inside said medium, the plurality of passive resonant elements (12) 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 ?/4, and at least one active resonant element (13) incorporated inside said plurality, said active resonant element (13) having a second structure different from a first structure of the passive resonant elements (12), so that said active resonant element (13) has at least a second resonance frequency comprised inside the frequency band-gap of said plurality of passive elements (12).Type: GrantFiled: May 6, 2011Date of Patent: April 4, 2017Assignees: TIME REVERSAL COMMUNICATIONS, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS)Inventors: Geoffroy Lerosey, Christian Leray, Fabrice Lemoult, Julien De Rosny, Arnaud Tourin, Mathias Fink
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Patent number: 9196960Abstract: 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.Type: GrantFiled: February 22, 2010Date of Patent: November 24, 2015Assignee: Centre National de la Recherche Scientifique—CNRSInventors: Fabrice Lemoult, Geoffroy Lerosey, Julien De Rosny, Ourir Abdel Waheb, Mathias Fink
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Patent number: 9065181Abstract: A device for receiving and/or emitting an electromagnetic wave having a free space wavelength ?0 comprised between 1 mm and 10 cm, comprising a medium (11) of solid dielectric material and the free space wavelength ?0 corresponding to a wavelength ? inside the medium, a plurality of conductor elements (12) incorporated inside the medium and spaced apart from each other of a distance lower than ?/10, and one antenna element (13). 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 ?/10, and has an electric resonance frequency corresponding to the wavelength ?.Type: GrantFiled: November 9, 2010Date of Patent: June 23, 2015Assignees: Time Reversal Communications, Centre National de la Recherche Scientifique-CNRSInventors: Julien De Rosny, Geoffroy Lerosey, Arnaud Tourin, Mathias Fink, Fabrice Lemoult
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Patent number: 8976078Abstract: A device for receiving and/or emitting an electromagnetic wave having a free space wavelength ?0 comprised between 1 mm and 10 cm, comprising a medium (11) of solid dielectric material and the free space wavelength ?0 corresponding to a wavelength ? inside the medium, a plurality of conductor elements (12) incorporated inside the medium and spaced apart from each other of a distance lower than ?/10, and one antenna element (13). 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 ?/10, and has a length Hwire adapted to generate an electromagnetic resonance in the tuned conductor element corresponding to the wavelength ?.Type: GrantFiled: November 9, 2010Date of Patent: March 10, 2015Assignees: Time Reversal Communications, Centre National de la Recherche Scientifique—CNRSInventors: Julien De Rosny, Geoffroy Lerosey, Arnaud Tourin, Mathias Fink, Fabrice Lemoult
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Patent number: 8687726Abstract: A method for transmitting digital data on a communication channel, between a transmitter base comprising N transmission antennas and K receivers. A signal carrier of frequency f0 and M sub-carriers of index m are used, adapted to transport K streams of digital data sk in parallel between the transmitter base and each receiver. The method comprises a step in which N.M complex symbols tn(m) are calculated from K.M symbols sk(m), by t n ? ( m ) = ? k = 1 K ? ? k · H k , n * ? ( m ) · s k ? ( m ) , where * denotes a complex conjugate, Hk,n(m) is a complex value estimating the transfer function of the communication channel between the transmission antenna n and the receiving antenna k at a corresponding frequency of the sub-carrier m, and ?k is a normalization coefficient.Type: GrantFiled: November 9, 2009Date of Patent: April 1, 2014Assignees: Time Reversal Communications, Centre National de la Recherche Scientifique-CNRSInventors: Julien De Rosny, Geoffroy Lerosey, Arnaud Tourin, Mathias Fink
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Publication number: 20140062821Abstract: A device (10) for receiving and/or emitting an electromagnetic wave, comprising a medium (11) of dielectric material, a plurality of passive resonant elements (12) incorporated inside said medium, the plurality of passive resonant elements (12) comprising a frequency band-gap, two neighbour passive resonant elements belonging to the plurality being spaced apart from each other of a first distance lower than ?/4, and at least one active resonant element (13) incorporated inside said plurality, said active resonant element (13) having a second structure different from a first structure of the passive resonant elements (12), so that said active resonant element (13) has at least a second resonance frequency comprised inside the frequency band-gap of said plurality of passive elements (12).Type: ApplicationFiled: May 6, 2011Publication date: March 6, 2014Applicants: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE - CNRS, TIME REVERSAL COMMUNICATIONSInventors: Geoffroy Lerosey, Christian Leray, Fabrice Lemoult, Julien De Rosny, Arnaud Tourin, Mathias Fink
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Publication number: 20120327744Abstract: 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.Type: ApplicationFiled: February 22, 2010Publication date: December 27, 2012Applicant: Centre National de la Recherche Scientifique-CNRS-Inventors: Fabrice Lemoult, Geoffroy Lerosey, Julien De Rosny, Ourir Abdel Waheb, Mathias Fink
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Publication number: 20120280886Abstract: A device for receiving and/or emitting an electromagnetic wave having a free space wavelength ?0 comprised between 1 mm and 10 cm, comprising a medium (11) of solid dielectric material and the free space wavelength ?0 corresponding to a wavelength ? inside the medium, a plurality of conductor elements (12) incorporated inside the medium and spaced apart from each other of a distance lower than ?/10, and one antenna element (13). 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 ?/10, and has a length Hwire adapted to generate an electromagnetic resonance in the tuned conductor element corresponding to the wavelength ?.Type: ApplicationFiled: November 9, 2010Publication date: November 8, 2012Applicants: Centre National De La Recherche Scientifique - CNRS, Time Reversal CommunicationsInventors: Julien De Rosny, Geoffroy Lerosey, Arnaud Tourin, Mathias Fink, Fabrice Lemoult
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Publication number: 20120212388Abstract: A device for receiving and/or emitting an electromagnetic wave having a free space wavelength ?0 comprised between 1 mm and 10 cm, comprising a medium (11) of solid dielectric material and the free space wavelength ?0 corresponding to a wavelength ? inside the medium, a plurality of conductor elements (12) incorporated inside the medium and spaced apart from each other of a distance lower than ?/10, and one antenna element (13). 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 ?/10, and has an electric resonance frequency corresponding to the wavelength ?.Type: ApplicationFiled: November 9, 2010Publication date: August 23, 2012Applicants: Centre National De La Recherche Scientifique - CNRS, Time Reversal CommunicationsInventors: Julien De Rosny, Geoffroy Lerosey, Arnaud Tourrin, Mathias Fink, Fabrice Lemoult
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Publication number: 20120207234Abstract: A method for transmitting digital data on a communication channel, between a transmitter base comprising N transmission antennas and K receivers. A signal carrier of frequency f0 and M sub-carriers of index m are used, adapted to transport K streams of digital data sk in parallel between the transmitter base and each receiver. The method comprises a step in which N.M complex symbols tn(m) are calculated from K.M symbols sk(m), by t n ? ( m ) = ? k = 1 K ? ? k · H k , n * ? ( m ) · s k ? ( m ) , where * denotes a complex conjugate, Hk,n(m) is a complex value estimating the transfer function of the communication channel between the transmission antenna n and the receiving antenna k at a corresponding frequency of the sub-carrier m, and ?k is a normalization coefficient.Type: ApplicationFiled: November 9, 2009Publication date: August 16, 2012Applicants: Centre National De La Recherche Scientifique-CNRS-, Time Reversal CommunicationsInventors: Julien De Rosny, Geoffroy Lerosey, Arnaud Tourin, Mathias Fink
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Patent number: 7653137Abstract: According to the invention, a wave, corresponding to a signal s(t) may be temporally inverted by application of a first transformation to lower the central frequency thereof to produce a first set of transformed signals Ki(t) then a second set of transformed signals K?i(t) is produced representing the temporal inversion signal s(?t) and a third transformation is applied to said second set to generate the temporally-inverted signal s(?t)Type: GrantFiled: April 11, 2005Date of Patent: January 26, 2010Assignees: Centre National de la Recherche -CNRS-, Universite Paris 7 - Denis DiderotInventors: Mathias Fink, Geoffroy Lerosey, Arnaud Derode, Julien De Rosny, Arnaud Tourin
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Publication number: 20070211788Abstract: According to the invention, a wave, corresponding to a signal s(t) may be temporally inverted by application of a first transformation to lower the central frequency thereof to produce a first set of transformed signals Ki(t) then a second set of transformed signals K?i(t) is produced representing the temporal inversion signal s(?t) and a third transformation is applied to said second set to generate the temporally-inverted signal s(?t)Type: ApplicationFiled: April 11, 2005Publication date: September 13, 2007Applicants: CENTRAL NATIONAL DE LA RECHERCHE SCIENTIFIQUE-CNRS, UNIVERSITE PARIS 7-DENIS DIDEROTInventors: Mathias Fink, Geoffory Lerosey, Arnaud Derode, Julien De Rosny, Arnaud Tourin