Patents by Inventor Christophe Caloz
Christophe Caloz 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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Publication number: 20220268999Abstract: There is provided a scattering element comprising a vertically-oriented waveguide comprising one or more dielectric components configured to provide directional scattering of an incident electromagnetic wave in a pattern caused by one of interference between at least two guided components and interference between at least one guided component and at least one radiative component, the guided and radiative components excited by the incident electromagnetic wave. A grating device for transmission or reflection of incident electromagnetic waves in a desired direction, the grating device comprising an array of the scattering elements, is also provided.Type: ApplicationFiled: July 30, 2020Publication date: August 25, 2022Inventors: Ashutosh PATRI, Stephane KÊNA-COHEN, Christophe CALOZ
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Patent number: 9496914Abstract: Antenna units, antenna systems and polarizing systems provide polarization diversity to leaky-wave antennas. An antenna unit comprises a rat-race coupler having a summation port, a difference port and two output ports. Each one of a pair of composite right/left-handed (CRLH) leaky-wave antennas (LWA) is connected at one end to a respective one of the output ports of the rat-race coupler. An inductive stub is implemented between the CRLH LWAs for connecting the CRLH LWAs to a grounded via. Various polarizations are obtained by injecting a radio-frequency (RF) signal in the summation or difference port of the rat-race coupler, or in both ports. System variants include various devices and assemblies for injecting RF signals in the antenna unit. One such variant includes a polarizing system having a switched matrix for directing a signal according to various intended polarizations.Type: GrantFiled: January 13, 2012Date of Patent: November 15, 2016Assignee: POLYVALOR, LIMITED PARTNERSHIPInventors: Christophe Caloz, Samer Abielmona, Van-Hoang Nguyen, Ning Yang
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Patent number: 9246238Abstract: The present system relates to radiation pattern control. More particularly, the present system is adapted for controlling a radiation pattern of a directional antenna. The system comprises a sample collection unit, a power angular spectrum estimation unit and a control unit. The sample collection unit is adapted for collecting a plurality of samples of a signal with a current radiation pattern and a plurality of samples of the signal with different radiation patterns. The power angular spectrum estimation unit is adapted for estimating a preliminary spectrum of the signal based on the collected plurality of samples with the current radiation pattern and for estimating an optimized spectrum of the signal based on the collected plurality of samples with different radiation patterns. Then, the control unit sets the radiation pattern of the directional antenna to the estimated optimized spectrum.Type: GrantFiled: February 19, 2010Date of Patent: January 26, 2016Assignee: Polyvalor, Limited PartnershipInventors: Jean-François Frigon, Christophe Caloz, Samer Abielmona, Van-Hoang Nguyen
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Patent number: 9124005Abstract: The present device and method improve radiation efficiency of a leaky wave antenna. The device and method collect non-radiated power signal from the leaky wave antenna, perform a passive operation on the non-radiated power signal to obtain a modified power signal, and radiate the modified power signal.Type: GrantFiled: December 7, 2010Date of Patent: September 1, 2015Assignee: CORPORATION DE LE'ECOLE POLYTECHNIQUE DE MONTREALInventors: Van-Hoang Nguyen, Armin Parsa, Christophe Caloz, Samer Abielmona
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Publication number: 20140347234Abstract: Antenna units, antenna systems and polarizing systems provide polarization diversity to leaky-wave antennas. An antenna unit comprises a rat-race coupler having a summation port, a difference port and two output ports. Each one of a pair of composite right/left-handed (CRLH) leaky-wave antennas (LWA) is connected at one end to a respective one of the output ports of the rat-race coupler. An inductive stub is implemented between the CRLH LWAs for connecting the CRLH LWAs to a grounded via. Various polarizations are obtained by injecting a radio-frequency (RF) signal in the summation or difference port of the rat-race coupler, or in both ports. System variants include various devices and assemblies for injecting RF signals in the antenna unit. One such variant includes a polarizing system having a switched matrix for directing a signal according to various intended polarizations.Type: ApplicationFiled: January 13, 2012Publication date: November 27, 2014Applicant: POLYVALOR, LIMITED PARTNERSHIPInventors: Christophe Caloz, Samer Abielmona, Van-Hoang Nguyen, Ning Yang
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Patent number: 8896484Abstract: The present invention relates to a dynamic radiation pattern diversity antenna system comprising a transmission line, a plurality of varactor diodes, and a radiation pattern control unit. The transmission line defines a plurality of unit cells. Each varactor diode is electrically connected to a corresponding unit cell. The radiation pattern control unit is electrically connected to each of the plurality of varactor diodes, and controls the electrical actuation thereof. Upon electrical actuation of the varactor diodes, each unit cell radiates at an angle corresponding to a voltage applied to the corresponding varactor diode.Type: GrantFiled: December 9, 2011Date of Patent: November 25, 2014Assignee: Polyvalor, Limited PartnershipInventors: Jean-Francois Frigon, Christophe Caloz
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Publication number: 20140300520Abstract: The present relates to a leaky-wave antenna unit. The leaky wave antenna unit comprises a leaky wave antenna having two ports and a switching unit. The switching unit comprises an input, two throws and an actuator. The input of the switching unit receives a signal to be radiated by the leaky wave antenna. Each of the throw is connected to a different port of the leaky wave antenna, while the actuator switches the input between the two throws.Type: ApplicationFiled: April 5, 2012Publication date: October 9, 2014Applicant: Polyvalor, Limited PartnershipInventors: Van-Hoang Nguyen, Samer Abielmona, Christophe Caloz
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Patent number: 8405469Abstract: High-frequency couplers and coupling techniques are described utilizing artificial composite right/left-handed transmission line (CRLH-TL). Three specific forms of couplers are described; (1) a coupled-line backward coupler is described with arbitrary tight/loose coupling and broad bandwidth; (2) a compact enhanced-bandwidth hybrid ring coupler is described with increased bandwidth and decreased size; and (3) a dual-band branch-line coupler that is not limited to a harmonic relation between the bands. These variations are preferably implemented in a microstrip fabrication process and may use lumped-element components. The couplers and coupling techniques are directed at increasing the utility while decreasing the size of high-frequency couplers, and are suitable for use with separate coupler or couplers integrated within integrated devices.Type: GrantFiled: December 6, 2011Date of Patent: March 26, 2013Assignee: The Regents of the University of CaliforniaInventors: Tatsuo Itoh, Christophe Caloz, I-Hsiang Lin, Hiroshi Okabe
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Publication number: 20120262356Abstract: The present device and method improve radiation efficiency of a leaky wave antenna. The device and method collect non-radiated power signal from the leaky wave antenna, perform a passive operation on the non-radiated power signal to obtain a modified power signal, and radiate the modified power signal.Type: ApplicationFiled: December 7, 2010Publication date: October 18, 2012Applicant: CORPORATION DE L'ECOLE POLYTECHNIQUE DE MONTREALInventors: Van-Hoang Nguyen, Armin Parsa, Christophe Caloz, Samer Abielmona
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Publication number: 20120139659Abstract: High-frequency couplers and coupling techniques are described utilizing artificial composite right/left-handed transmission line (CRLH-TL). Three specific forms of couplers are described; (1) a coupled-line backward coupler is described with arbitrary tight/loose coupling and broad bandwidth; (2) a compact enhanced-bandwidth hybrid ring coupler is described with increased bandwidth and decreased size; and (3) a dual-band branch-line coupler that is not limited to a harmonic relation between the bands. These variations are preferably implemented in a microstrip fabrication process and may use lumped-element components. The couplers and coupling techniques are directed at increasing the utility while decreasing the size of high-frequency couplers, and are suitable for use with separate coupler or couplers integrated within integrated devices.Type: ApplicationFiled: December 6, 2011Publication date: June 7, 2012Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Tatsuo Itoh, Christophe Caloz, I-Hsiang Lin, Hiroshi Okabe
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Publication number: 20120081251Abstract: The present invention relates to a dynamic radiation pattern antenna system comprising a plurality of antenna units, a control unit and an electronic interface. The plurality of antenna units has electronically controllable radiation patterns. The control unit is dynamically controlling the radiation pattern of the plurality of antenna units and the electronic interface connects the plurality of antenna units to the control unit.Type: ApplicationFiled: December 9, 2011Publication date: April 5, 2012Applicant: POLYVALOR, LIMITED PARTNERSHIPInventors: Jean-Francois FRIGON, Christophe CALOZ
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Publication number: 20120044108Abstract: The present system relates to radiation pattern control. More particularly, the present system is adapted for controlling a radiation pattern of a directional antenna. The system comprises a sample collection unit, a power angular spectrum estimation unit and a control unit. The sample collection unit is adapted for collecting a plurality of samples of a signal with a current radiation pattern and a plurality of samples of the signal with different radiation patterns. The power angular spectrum estimation unit is adapted for estimating a preliminary spectrum of the signal based on the collected plurality of samples with the current radiation pattern and for estimating an optimized spectrum of the signal based on the collected plurality of samples with different radiation patterns. Then, the control unit sets the radiation pattern of the directional antenna to the estimated optimized spectrum.Type: ApplicationFiled: February 19, 2010Publication date: February 23, 2012Inventors: Jean-Francois Frigon, Christophe Caloz, Samer Abielmona, Van-Hoang Nguyen
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Patent number: 8094074Abstract: The present invention relates to a dynamic radiation pattern antenna system comprising a plurality of antenna units, a control unit and an electronic interface. The plurality of antenna units has electronically controllable radiation patterns. The control unit is dynamically controlling the radiation pattern of the plurality of antenna units and the electronic interface connects the plurality of antenna units to the control unit.Type: GrantFiled: November 29, 2007Date of Patent: January 10, 2012Assignee: Polyvalor, Limited PartnershipInventors: Jean-François Frigon, Christophe Caloz
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Patent number: 8072289Abstract: High-frequency couplers and coupling techniques are described utilizing artificial composite right/left-handed transmission line (CRLH-TL). Three specific forms of couplers are described; (1) a coupled-line backward coupler is described with arbitrary tight/loose coupling and broad bandwidth; (2) a compact enhanced-bandwidth hybrid ring coupler is described with increased bandwidth and decreased size; and (3) a dual-band branch-line coupler that is not limited to a harmonic relation between the bands. These variations are preferably implemented in a microstrip fabrication process and may use lumped-element components. The couplers and coupling techniques are directed at increasing the utility while decreasing the size of high-frequency couplers, and are suitable for use with separate coupler or couplers integrated within integrated devices.Type: GrantFiled: May 16, 2008Date of Patent: December 6, 2011Assignee: The Regents of the University of CaliforniaInventors: Tatsuo Itoh, Christophe Caloz, I-Hsiang Lin, Hiroshi Okabe
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Publication number: 20110248797Abstract: The present invention relates to a tunable delay system and corresponding method for delaying a signal. The system includes an oscillator for providing a carrier. A first mixer modulates the signal with the carrier. The modulated signal is delayed in a metamaterial transmission line. Afterwards, a second mixer is used to separate the delayed signal from the carrier. The present invention also relates to using a metamaterial transmission line for delaying a modulated signal.Type: ApplicationFiled: March 18, 2008Publication date: October 13, 2011Inventors: Christophe Caloz, Van-Hoang Nguyen, Samer Abielmona, Shulabh Gupta
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Publication number: 20110090023Abstract: High-frequency couplers and coupling techniques are described utilizing artificial composite right/left-handed transmission line (CRLH-TL). Three specific forms of couplers are described; (1) a coupled-line backward coupler is described with arbitrary tight/loose coupling and broad bandwidth; (2) a compact enhanced-bandwidth hybrid ring coupler is described with increased bandwidth and decreased size; and (3) a dual-band branch-line coupler that is not limited to a harmonic relation between the bands. These variations are preferably implemented in a microstrip fabrication process and may use lumped-element components. The couplers and coupling techniques are directed at increasing the utility while decreasing the size of high-frequency couplers, and are suitable for use with separate coupler or couplers integrated within integrated devices.Type: ApplicationFiled: May 16, 2008Publication date: April 21, 2011Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Tatsuo Itoh, Christophe Caloz, I-Hsiang Lin, Hiroshi Okabe
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Patent number: 7675384Abstract: High-frequency couplers and coupling techniques are described utilizing artificial composite right/left-handed transmission line (CRLH-TL). Three specific forms of couplers are described; (1) a coupled-line backward coupler is described with arbitrary tight/loose coupling and broad bandwidth; (2) a compact enhanced-bandwidth hybrid ring coupler is described with increased bandwidth and decreased size; and (3) a dual-band branch-line coupler that is not limited to a harmonic relation between the bands. These variations are preferably implemented in a microstrip fabrication process and may use lumped-element components. The couplers and coupling techniques are directed at increasing the utility while decreasing the size of high-frequency couplers, and are suitable for use with separate coupler or couplers integrated within integrated devices.Type: GrantFiled: May 16, 2008Date of Patent: March 9, 2010Assignee: The Regents of the University of CaliforniaInventors: Tatsuo Itoh, Christophe Caloz, I-Hsiang Lin, Hiroshi Okabe
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Patent number: 7667555Abstract: High-frequency couplers and coupling techniques are described utilizing artificial composite right/left-handed transmission line (CRLH-TL). Three specific forms of couplers are described; (1) a coupled-line backward coupler is described with arbitrary tight/loose coupling and broad bandwidth; (2) a compact enhanced-bandwidth hybrid ring coupler is described with increased bandwidth and decreased size; and (3) a dual-band branch-line coupler that is not limited to a harmonic relation between the bands. These variations are preferably implemented in a microstrip fabrication process and may use lumped-element components. The couplers and coupling techniques are directed at increasing the utility while decreasing the size of high-frequency couplers, and are suitable for use with separate coupler or couplers integrated within integrated devices.Type: GrantFiled: May 16, 2008Date of Patent: February 23, 2010Assignee: The Regents of the University of CaliforniaInventors: Tatsuo Itoh, Christophe Caloz, I-Hsiang Lin, Hiroshi Okabe
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Publication number: 20090140920Abstract: The present invention relates to a dynamic radiation pattern antenna system comprising a plurality of antenna units, a control unit and an electronic interface. The plurality of antenna units has electronically controllable radiation patterns. The control unit is dynamically controlling the radiation pattern of the plurality of antenna units and the electronic interface connects the plurality of antenna units to the control unit.Type: ApplicationFiled: November 29, 2007Publication date: June 4, 2009Inventors: Jean-Francois Frigon, Christophe Caloz
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Publication number: 20090079513Abstract: High-frequency couplers and coupling techniques are described utilizing artificial composite right/left-handed transmission line (CRLH-TL). Three specific forms of couplers are described; (1) a coupled-line backward coupler is described with arbitrary tight/loose coupling and broad bandwidth; (2) a compact enhanced-bandwidth hybrid ring coupler is described with increased bandwidth and decreased size; and (3) a dual-band branch-line coupler that is not limited to a harmonic relation between the bands. These variations are preferably implemented in a microstrip fabrication process and may use lumped-element components. The couplers and coupling techniques are directed at increasing the utility while decreasing the size of high-frequency couplers, and are suitable for use with separate coupler or couplers integrated within integrated devices.Type: ApplicationFiled: May 16, 2008Publication date: March 26, 2009Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Tatsuo Itoh, Christophe Caloz, I-Hsiang Lin, Hiroshi Okabe