Patents by Inventor David R. Smith

David R. Smith 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).

  • Publication number: 20180131060
    Abstract: The present disclosure provides systems and methods associated with mode conversion for electromagnetic field modification. A mode converting structure (holographic metamaterial) is formed with a distribution of dielectric constants chosen to convert an electromagnetic radiation pattern from a first mode to a second mode to attain a target electromagnetic radiation pattern that is different from the input electromagnetic radiation pattern. A solution to a holographic equation provides a sufficiently accurate approximation of a distribution of dielectric constants that can be used to form a mode converting device for use with one or more transmission lines, such as waveguides. One or more optimization algorithms can be used to improve the efficiency of the mode conversion.
    Type: Application
    Filed: July 17, 2017
    Publication date: May 10, 2018
    Inventors: Tom Driscoll, John Desmond Hunt, Nathan Ingle Landy, David R. Smith, Yaroslav A. Urzhumov
  • Publication number: 20180129116
    Abstract: An embodiment simultaneously receives light waves emanating from an object and having first frequency components f1.1 and f1.2, and pumped monochromatic coherent light waves having a second frequency f2. The method non-linearly combines the light waves having the first frequency component f1.1 and the pumped monochromatic coherent light waves, and generates coherent light waves having a third frequency component f3.1 that is a sum of the first frequency f1.1 and the second frequency f2. The method non-linearly combines the light waves having the first frequency component f1.2 and the pumped monochromatic coherent light waves, and generates coherent light waves having a third frequency component f3.2 that is a sum of the first frequency f1.2 and the second frequency f2. The method digitizes the generated coherent light waves and outputs an image responsive to the light waves emanating from the object.
    Type: Application
    Filed: October 31, 2017
    Publication date: May 10, 2018
    Inventors: GLEB M. AKSELROD, DAVID R. SMITH
  • Publication number: 20180129115
    Abstract: Embodiments include an apparatus and method. An apparatus includes a metasurface that coherently upconverts light waves having a first frequency f1. A substrate forms a first plasmonic surface. A plasmonic nanoparticle forms a second plasmonic surface. A layer of a second-order nonlinear dielectric material is disposed between the first plasmonic surface and the second plasmonic surface. The metasurface has at least three plasmonic resonant modes including a first plasmonic resonant mode having a first frequency f1, a second plasmonic resonant mode having a second frequency f2, and a third plasmonic resonant mode having a third frequency f3 that is a sum of the first frequency f1 and the second frequency f2. The apparatus includes a second light propagation path from a source of pumped monochromatic coherent light waves having the second frequency f2 to the metasurface. A digital image capture device captures the generated light waves having the frequency f3.
    Type: Application
    Filed: October 31, 2017
    Publication date: May 10, 2018
    Inventors: GLEB M. AKSELROD, DAVID R. SMITH
  • Publication number: 20180120071
    Abstract: Thermally-sensitive hardware is at least partially enclosed within a container in which reactants for a solid-solid endothermic chemical reaction are disposed, surrounding at least a portion of the thermally-sensitive hardware. The reactants or a structure including the reactants are positioned between the thermally-sensitive hardware and a heat source, such as an external surface of a missile traveling through atmospheric gases at extremely high speed and experiencing extreme frictional heating. The reactants absorb heat during the solid-solid endothermic reaction to thermally protect the thermally-sensitive hardware. The reactants are preferably selected to absorb heat of at least 5 kilo-Joules per gram (kJ/g) during the solid-solid endothermic chemical reaction.
    Type: Application
    Filed: November 2, 2016
    Publication date: May 3, 2018
    Inventors: David R. Smith, Thomas M. Deppert
  • Publication number: 20180108992
    Abstract: Modulation patterns for surface scattering antennas provide desired antenna pattern attributes such as reduced side lobes and reduced grating lobes.
    Type: Application
    Filed: October 3, 2017
    Publication date: April 19, 2018
    Inventors: PAI-YEN CHEN, TOM DRISCOLL, SIAMAK EBADI, JOHN DESMOND HUNT, NATHAN INGLE LANDY, MELROY MACHADO, MILTON PERQUE, JR., DAVID R. SMITH, YAROSLAV A. URZHUMOV
  • Patent number: 9930825
    Abstract: A device for coating items is provided. The device includes a hopper configured to hold particles of coating. The device also includes a spout including a first end and a second end. The spout is coupled to the hopper at the first end and is configured to receive the particles of coating from the hopper. The device also includes a distribution device coupled between the hopper and the spout and configured to distribute the particles of coating from the hopper into the spout at the first end of the spout. The device also includes a size adjuster device coupled to the second end of the spout. The size adjuster device is configured to resize the particles of coating and to discharge the particles of coating.
    Type: Grant
    Filed: October 19, 2015
    Date of Patent: April 3, 2018
    Assignee: Unverferth Manufacturing Company, Inc.
    Inventors: Michael J. Hilvers, David R. Smith
  • Patent number: 9935375
    Abstract: A surface scattering reflector antenna includes a plurality of adjustable scattering elements and is configured to produce a reflected beam pattern according to the configuration of the adjustable scattering elements.
    Type: Grant
    Filed: December 10, 2013
    Date of Patent: April 3, 2018
    Inventors: Jeffrey A. Bowers, David Jones Brady, Tom Driscoll, John Desmond Hunt, Roderick A. Hyde, Nathan Ingle Landy, Guy Shlomo Lipworth, Alexander Mrozack, David R. Smith, Clarence T. Tegreene
  • Patent number: 9927503
    Abstract: Described embodiments include an apparatus, and a method. An apparatus includes an array of at least two artificially structured electromagnetic unit cells. The at least two artificially structured electromagnetic unit cells are configured to generate a pulse of radiofrequency magnetic field B1 orientated transverse to the quasistatic magnetic field B0 parallel to the z-axis of the bore of a MRI or NMR device by transforming an incident pulse of radiofrequency electromagnetic waves. The generated pulse having magnetic field intensity sufficient to excite a detectable magnetic resonance in magnetically active nuclei located within at least a portion of an examination region located within the bore. The apparatus includes a radiofrequency electromagnetic wave conducting structure configured to distribute a received pulse of radiofrequency electromagnetic waves as an incident pulse of radiofrequency electromagnetic waves to the at least two artificially structured electromagnetic unit cells.
    Type: Grant
    Filed: July 17, 2014
    Date of Patent: March 27, 2018
    Inventors: Tom Driscoll, David R. Smith, Yaroslav A. Urzhumov
  • Patent number: 9927505
    Abstract: Described embodiments include a system, apparatus, and method. An apparatus includes an array of at least two groups of at least two artificially structured electromagnetic unit cells. Each group of the at least two groups configured to be respectively linearly arranged with respect to the z-axis of the bore of MRI or NMR device. Each group of the at least two groups of artificially structured electromagnetic unit cells configured to transform an incident pulse of radiofrequency electromagnetic waves into a pulse of radiofrequency magnetic field B1 orientated transverse to a segment of the z-axis and spatially proximate to the group. The apparatus includes a radiofrequency electromagnetic wave conducting structure configured to selectably distribute a received pulse of radiofrequency electromagnetic waves to a group of the at least two groups.
    Type: Grant
    Filed: July 17, 2014
    Date of Patent: March 27, 2018
    Inventors: Tom Driscoll, David R. Smith, Yaroslav A. Urzhumov
  • Patent number: 9919779
    Abstract: A lightweight transport vessel transports compressed natural gas underwater without needing to liquefy the gas for transport.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: March 20, 2018
    Assignee: Elwha LLC
    Inventors: Jesse R. Cheatham, III, Tom Driscoll, Alexander Galt Hyde, Roderick A. Hyde, Muriel Y. Ishikawa, Jordin T. Kare, Nathan P. Myhrvold, Tony S. Pan, Robert C. Petroski, David R. Smith, Clarence T. Tegreene, Nicholas W. Touran, Yaroslav A. Urzhumov, Charles Whitmer, Lowell L. Wood, Jr., Victoria Y. H. Wood
  • Publication number: 20180077711
    Abstract: An automatically adjustable radiofrequency link system includes a radiofrequency transmitter configured to transmit a signal at a frequency of transmission within an extremely high frequency (EHF) band. The system further includes a receiving device configured to receive the transmitted signal and provide feedback to a processing circuit communicatively coupled to the transmitter and the receiving device, wherein the feedback is related to the received signal. The processing circuit is configured to determine required signal properties based on the feedback and determine signal loss properties including an effect of atmospheric absorption, as a function of frequency; determine a modification to the transmitted signal using the signal loss properties and the required signal properties; and adjust the frequency of transmission to obtain a desired transmission signal using the modification.
    Type: Application
    Filed: November 20, 2017
    Publication date: March 15, 2018
    Applicant: Elwha LLC
    Inventors: Jeffrey A. Bowers, Alistair K. Chan, Russell J. Hannigan, Roderick A. Hyde, Jordin T. Kare, Nathan Kundtz, Nathan P. Myhrvold, John Brian Pendry, David R. Smith, Clarence T. Tegreene, David B. Tuckerman, Charles Whitmer, Lowell L. Wood,, JR.
  • Publication number: 20180069318
    Abstract: Complementary metamaterial elements provide an effective permittivity and/or permeability for surface structures and/or waveguide structures. The complementary metamaterial resonant elements may include Babinet complements of “split ring resonator” (SRR) and “electric LC” (ELC) metamaterial elements. In some approaches, the complementary metamaterial elements are embedded in the bounding surfaces of planar waveguides, e.g. to implement waveguide based gradient index lenses for beam steering/focusing devices, antenna array feed structures, etc.
    Type: Application
    Filed: September 18, 2017
    Publication date: March 8, 2018
    Inventors: David R. Smith, Ruopeng Liu, Tie Jun Cui, Qiang Cheng, Jonah N. Gollub
  • Publication number: 20180057631
    Abstract: An article of manufacture includes a zinc sulfide layer and a coupling agent adhered to the zinc sulfide layer by a disulfide bond. The coupling agent comprises a functional group extending from the zinc sulfide layer.
    Type: Application
    Filed: October 27, 2017
    Publication date: March 1, 2018
    Inventors: Thomas M. Deppert, David R. Smith, William C. Mollberg, Brian J. Zelinski
  • Patent number: 9902802
    Abstract: An article of manufacture includes a zinc sulfide layer and a coupling agent adhered to the zinc sulfide layer by a disulfide bond. The coupling agent comprises a functional group extending from the zinc sulfide layer.
    Type: Grant
    Filed: December 8, 2014
    Date of Patent: February 27, 2018
    Assignee: RAYTHEON COMPANY
    Inventors: Thomas M. Deppert, David R. Smith, William C. Mollberg, Brian J. Zelinski
  • Patent number: 9897669
    Abstract: Described embodiments include a system, apparatus, and method. A system includes an array of at least two groups of at least two artificially structured electromagnetic unit cells. Each group includes a controllable amplifier responsive to a B1 localization control signal and configured to amplify a received pulse of radiofrequency electromagnetic waves. Each group includes an electromagnetic wave conducting structure configured to deliver an amplified pulse of radiofrequency electromagnetic waves to the at least two artificially structured electromagnetic unit cells. The at least two artificially structured electromagnetic unit cells are configured to transform the incident amplified pulse into a pulse of radiofrequency magnetic field B1 orientated transverse to a segment of the z-axis.
    Type: Grant
    Filed: July 17, 2014
    Date of Patent: February 20, 2018
    Inventors: Tom Driscoll, David R. Smith, Yaroslav A. Urzhumov
  • Publication number: 20180045862
    Abstract: The present disclosure is directed to systems for tuning nanocube plasmonic resonators and methods for forming tunable plasmonic resonators. A tunable plasmonic resonator system can include a substrate and a nanostructure positioned on a surface of the substrate. The substrate can include a semiconductor material having a carrier density distribution. A junction can be formed between the nanostructure and the substrate forming a Schottky junction. Changing the carrier density distribution of the semiconductor material can change a plasmonic response of the plasmonic resonator.
    Type: Application
    Filed: October 30, 2017
    Publication date: February 15, 2018
    Applicant: Elwha LLC
    Inventors: Jesse R. Cheatham, III, Tom Driscoll, Roderick A. Hyde, Muriel Y. Ishikawa, Jordin T. Kare, Nathan P. Myhrvold, Tony S. Pan, Robert C. Petroski, David R. Smith, Clarence T. Tegreene, Nicholas W. Touran, Yaroslav A. Urzhumov, Charles Whitmer, Lowell L. Wood, Jr., Victoria Y.H. Wood
  • Patent number: 9880240
    Abstract: Described embodiments include a system, apparatus, and method. An apparatus includes an assemblage of artificially structured electromagnetic unit cells. The assemblage of artificially structured electromagnetic unit cells includes a first artificially structured electromagnetic unit cell configured to transform incident radiofrequency electromagnetic waves into a radiofrequency magnetic field B perpendicular to the plane of the assemblage. The assemblage of artificially structured electromagnetic unit cells includes a second artificially structured electromagnetic unit cell configured to transform the incident radiofrequency electromagnetic waves into an electric field E counteracting a non-vanishing electric field component generated by the first artificially structured electromagnetic unit cell.
    Type: Grant
    Filed: July 17, 2014
    Date of Patent: January 30, 2018
    Inventors: Tom Driscoll, David R. Smith, Yaroslav A. Urzhumov
  • Patent number: 9871291
    Abstract: Described embodiments include a system, method, and apparatus. A system includes an antenna comprising a sub-Nyquist holographic aperture configured to define selectable arbitrary complex radiofrequency electromagnetic fields on a surface of the antenna. A path analysis engine tests power transmission pathways from the antenna to a target device located in an environment within a space radiateable by the antenna. The environment includes a human being. An optimization circuit selects responsive to the tested power transmission pathways a power transmission regime. The regime includes an electromagnetic radiation pattern shaped to transfer radiofrequency electromagnetic power from the antenna to the target device without exceeding a radiation exposure limit for humans. A gain definition circuit selects a complex radiofrequency electromagnetic field implementing the selected power transmission regime from the at least two selectable, complex radiofrequency electromagnetic fields.
    Type: Grant
    Filed: April 21, 2014
    Date of Patent: January 16, 2018
    Inventors: Pai-Yen Chen, Tom Driscoll, Siamak Ebadi, John Desmond Hunt, Nathan Ingle Landy, Melroy Machado, Milton Perque, Jr., David R. Smith, Yaroslav A. Urzhumov
  • Patent number: 9862851
    Abstract: A optical element includes a surface including a zinc sulfide layer; a coupling agent adhered to the zinc sulfide layer by a disulfide bond and including a hydrocarbon tail extending from the disulfide bond; and a polymer bonded to the hydrocarbon tail of the coupling agent by a covalent bond; wherein the polymer and the coupling agent are optically transparent in the long wavelength infrared (LWIR) region.
    Type: Grant
    Filed: November 13, 2015
    Date of Patent: January 9, 2018
    Assignee: RAYTHEON COMPANY
    Inventors: Thomas M. Deppert, David R. Smith, Amanda Gravanda
  • Publication number: 20170371228
    Abstract: Described embodiments include a plasmonic apparatus and method. The plasmonic apparatus includes a substrate having a first negative-permittivity layer comprising a first plasmonic surface. The plasmonic apparatus includes a plasmonic nanoparticle having a base with a second negative-permittivity layer comprising a second plasmonic surface. The plasmonic apparatus includes a dielectric-filled gap between the first plasmonic surface and the second plasmonic surface. The plasmonic apparatus includes a plasmonic cavity created by an assembly of the first plasmonic surface, the second plasmonic surface, and the dielectric-filled gap, and having a spectrally separated first fundamental resonant cavity wavelength ?1 and second fundamental resonant cavity wavelength ?2. The plasmonic apparatus includes a plurality of fluorescent particles located in the dielectric-filled gap.
    Type: Application
    Filed: June 27, 2016
    Publication date: December 28, 2017
    Inventors: GLEB M. AKSELROD, RODERICK A. HYDE, MURIEL Y. ISHIKAWA, JORDIN T. KARE, MAIKEN H. MIKKELSEN, TONY S. PAN, DAVID R. SMITH, CLARENCE T. TEGREENE, YAROSLAV A. URZHUMOV, CHARLES WHITMER, LOWELL L. WOOD, JR., VICTORIA Y.H. WOOD