Patents by Inventor Nuria Llombart
Nuria Llombart 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: 11824247Abstract: A set of antenna geometries for use in integrated arrays at terahertz frequencies are described. Two fabrication techniques to construct such antennas are presented. The first technique uses an advanced laser micro-fabrication, allowing fabricating advanced 3D geometries. The second technique uses photolithographic processes, allowing the fabrication of arrays on a single wafer in parallel.Type: GrantFiled: May 19, 2020Date of Patent: November 21, 2023Assignee: CALIFORNIA INSTITUTE OF TECHNOLOGYInventors: Goutam Chattopadhyay, Imran Mehdi, Choonsup Lee, John J. Gill, Cecile D. Jung-Kubiak, Nuria Llombart
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Patent number: 10892548Abstract: A photoconductive antenna has an array of antenna electrodes on or in a photoconductive substrate. The photoconductive substrate is irradiated with light from a pulsed laser via micro-lenses above respective gaps between antenna electrodes. This makes the photoconductive substrate temporarily conductive, causing pulsed electric antenna currents that can be used for transmission of electromagnetic radiation in the Terahertz range. The bias circuit of the antenna is configured to determine voltages applied to the antenna electrodes by capacitive voltage division over a series of successive capacitors, each capacitor being formed by the antenna electrodes of a respective pair of successive ones of the antenna electrodes in the array as plates of the capacitor adjacent to a respective one of the gaps.Type: GrantFiled: August 4, 2016Date of Patent: January 12, 2021Assignee: TECHNISCHE UNIVERSITEIT DELFTInventors: Andrea Neto, Alessandro Garufo, Giorgio Carluccio, Nuria Llombart Juan
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Publication number: 20200313271Abstract: A set of antenna geometries for use in integrated arrays at terahertz frequencies are described. Two fabrication techniques to construct such antennas are presented. The first technique uses an advanced laser micro-fabrication, allowing fabricating advanced 3D geometries. The second technique uses photolithographic processes, allowing the fabrication of arrays on a single wafer in parallel.Type: ApplicationFiled: May 19, 2020Publication date: October 1, 2020Applicant: California Institute of TechnologyInventors: Goutam Chattopadhyay, Imran Mehdi, Choonsup Lee, John J. Gill, Cecile D. Jung-Kubiak, Nuria Llombart
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Patent number: 10693210Abstract: A set of antenna geometries for use in integrated arrays at terahertz frequencies are described. Two fabrication techniques to construct such antennas are presented. The first technique uses an advanced laser micro-fabrication, allowing fabricating advanced 3D geometries. The second technique uses photolithographic processes, allowing the fabrication of arrays on a single wafer in parallel.Type: GrantFiled: April 24, 2013Date of Patent: June 23, 2020Assignee: CALIFORNIA INSTITUTE OF TECHNOLOGYInventors: Goutam Chattopadhyay, Imran Mehdi, Choonsup Lee, John J. Gill, Cecile D. Jung-Kubiak, Nuria Llombart
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Publication number: 20180226715Abstract: A photoconductive antenna has an array of antenna electrodes on or in a photoconductive substrate. The photoconductive substrate is irradiated with light from a pulsed laser via micro-lenses above respective gaps between antenna electrodes. This makes the photoconductive substrate temporarily conductive, causing pulsed electric antenna currents that can be used for transmission of electromagnetic radiation in the Terahertz range. The bias circuit of the antenna is configured to determine voltages applied to the antenna electrodes by capacitive voltage division over a series of successive capacitors, each capacitor being formed by the antenna electrodes of a respective pair of successive ones of the antenna electrodes in the array as plates of the capacitor adjacent to a respective one of the gaps.Type: ApplicationFiled: August 4, 2016Publication date: August 9, 2018Inventors: Andrea Neto, Alessandro Garufo, Giorgio Carluccio, Nuria Llombart Juan
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Patent number: 8780012Abstract: An antenna element suitable for integrated arrays at terahertz frequencies is disclosed. The antenna element comprises an extended spherical (e.g. hemispherical) semiconductor lens, e.g. silicon, antenna fed by a leaky wave waveguide feed. The extended spherical lens comprises a substantially spherical lens adjacent a substantially planar lens extension. A couple of TE/TM leaky wave modes are excited in a resonant cavity formed between a ground plane and the substantially planar lens extension by a waveguide block coupled to the ground plane. Due to these modes, the primary feed radiates inside the lens with a directive pattern that illuminates a small sector of the lens. The antenna structure is compatible with known semiconductor fabrication technology and enables production of large format imaging arrays.Type: GrantFiled: June 30, 2010Date of Patent: July 15, 2014Assignee: California Institute of TechnologyInventors: Nuria Llombart Juan, Choonsup Lee, Goutam Chattopadhyay, John J. Gill, Anders J. Skalare, Peter H. Siegel
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Publication number: 20140144009Abstract: A set of antenna geometries for use in integrated arrays at terahertz frequencies are described. Two fabrication techniques to construct such antennas are presented. The first technique uses an advanced laser micro-fabrication, allowing fabricating advanced 3D geometries. The second technique uses photolithographic processes, allowing the fabrication of arrays on a single wafer in parallel.Type: ApplicationFiled: April 24, 2013Publication date: May 29, 2014Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGYInventors: Goutam CHATTOPADHYAY, Imran Mehdi, Choonsup Lee, John J. Gill, Cecile Jung-Kubiak, Nuria Llombart
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Patent number: 8144052Abstract: A three-dimensional imaging radar operating at high frequency e.g., 670 GHz radar using low phase-noise synthesizers and a fast chirper to generate a frequency-modulated continuous-wave (FMCW) waveform, is disclosed that operates with a multiplexed beam to obtain range information simultaneously on multiple pixels of a target. A source transmit beam may be divided by a hybrid coupler into multiple transmit beams multiplexed together and directed to be reflected off a target and return as a single receive beam which is demultiplexed and processed to reveal range information of separate pixels of the target associated with each transmit beam simultaneously. The multiple transmit beams may be developed with appropriate optics to be temporally and spatially differentiated before being directed to the target. Temporal differentiation corresponds to a different intermediate frequencies separating the range information of the multiple pixels.Type: GrantFiled: October 15, 2009Date of Patent: March 27, 2012Assignee: California Institute of TechnologyInventors: Ken B. Cooper, Robert J. Dengler, Peter H. Siegel, Goutam Chattopadhyay, John S. Ward, Nuria Llombart Juan, Tomas E. Bryllert, Imran Mehdi, Jan A. Tarsala
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Publication number: 20120013517Abstract: Methods and apparatus for integrating lens antennas for receivers are disclosed. A method of fabricating a lens in accordance with one or more embodiments of the present invention comprises integrating lens material with a dielectric material and flowing the lens material into a desired lens shape. An integrated lens antenna in accordance with one or more embodiments of the present invention comprises a dielectric material, a waveguide feed, coupled to the dielectric material through a leaky wave cavity, and a lens, coupled to the dielectric material opposite the leaky wave cavity, wherein material is first deposited onto the dielectric material, flowed into a desired lens shape and the desired lens shape is transferred to the dielectric material.Type: ApplicationFiled: June 14, 2011Publication date: January 19, 2012Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGYInventors: Choonsup Lee, Goutam Chattopadhyay, Nuria Llombart
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Publication number: 20100328779Abstract: An antenna element suitable for integrated arrays at terahertz frequencies is disclosed. The antenna element comprises an extended spherical (e.g. hemispherical) semiconductor lens, e.g. silicon, antenna fed by a leaky wave waveguide feed. The extended spherical lens comprises a substantially spherical lens adjacent a substantially planar lens extension. A couple of TE/TM leaky wave modes are excited in a resonant cavity formed between a ground plane and the substantially planar lens extension by a waveguide block coupled to the ground plane. Due to these modes, the primary feed radiates inside the lens with a directive pattern that illuminates a small sector of the lens. The antenna structure is compatible with known semiconductor fabrication technology and enables production of large format imaging arrays.Type: ApplicationFiled: June 30, 2010Publication date: December 30, 2010Applicant: California Institute of TechnolologyInventors: Nuria Llombart Juan, Choonsup Lee, Goutam Chattopadhyay, John J. Gill, Anders Skalare, Peter H. Siegel
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Publication number: 20100090887Abstract: A three-dimensional imaging radar operating at high frequency e.g., 670 GHz radar using low phase-noise synthesizers and a fast chirper to generate a frequency-modulated continuous-wave (FMCW) waveform, is disclosed that operates with a multiplexed beam to obtain range information simultaneously on multiple pixels of a target. A source transmit beam may be divided by a hybrid coupler into multiple transmit beams multiplexed together and directed to be reflected off a target and return as a single receive beam which is demultiplexed and processed to reveal range information of separate pixels of the target associated with each transmit beam simultaneously. The multiple transmit beams may be developed with appropriate optics to be temporally and spatially differentiated before being directed to the target. Temporal differentiation corresponds to a different intermediate frequencies separating the range information of the multiple pixels.Type: ApplicationFiled: October 15, 2009Publication date: April 15, 2010Applicant: California Institute of TechnologyInventors: Ken B. Cooper, Robert J. Dengler, Peter H. Siegel, Goutam Chattopadhyay, John S. Ward, Nuria Llombart Juan, Tomas E. Bryllert, Imran Mehdi, Jan A. Tarsala
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Patent number: 7130645Abstract: A method for providing an information unit to a user is described, wherein the information unit describes an object having a predetermined spatial relationship to the user. The method includes detecting a kind of movement or a position of the user. Depending on the detected kind of movement or the position of the user, a geographic selection criterion is adjusted, wherein, depending on the predetermined spatial relationship of object to user, the geographic selection criterion specifies whether the information unit is provided or not. If a location of the user is located such with respect to a geographic position of the user that the geographic selection criterion is met, the information unit for the object is reproduced. An advantage is that the concept may be employed in applications in which the user gets into different environments and situations which, in turn, require different geographic selection criteria.Type: GrantFiled: October 15, 2004Date of Patent: October 31, 2006Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Nuria Llombart-Juan, Heinz Gerhaeuser, Olaf Korte, Roland Plankenbuehler, Alexander Zink
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Publication number: 20050136947Abstract: A method for providing an information unit to a user is described, wherein the information unit describes an object having a predetermined spatial relationship to the user. The method includes detecting a kind of movement or a position of the user. Depending on the detected kind of movement or the position of the user, a geographic selection criterion is adjusted, wherein, depending on the predetermined spatial relationship of object to user, the geographic selection criterion specifies whether the information unit is provided or not. If a location of the user is located such with respect to a geographic position of the user that the geographic selection criterion is met, the information unit for the object is reproduced. An advantage is that the concept may be employed in applications in which the user gets into different environments and situations which, in turn, require different geographic selection criteria.Type: ApplicationFiled: October 15, 2004Publication date: June 23, 2005Inventors: Nuria Llombart-Juan, Heinz Gerhaeuser, Olaf Korte, Roland Plankenbuehler, Alexander Zink