Patents by Inventor Kevin A. Boulais

Kevin A. Boulais 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).

  • Patent number: 10734732
    Abstract: An optically tunable metamaterial unit cell is provided for photonic switching. The cell is optically tunable and includes a dielectric substrate with upper and lower surfaces. The cell further includes arrays of metamaterial elements and a layer of photo-capacitive material. The arrays are disposed the upper surface of the dielectric substrate. The metamaterial is capable of reflecting electromagnetic radiation. The layer of photo-capacitive material overlaps the arrays of metamaterial elements. The photo-capacitive material is optically tunable.
    Type: Grant
    Filed: January 31, 2020
    Date of Patent: August 4, 2020
    Assignee: United States of America, as represented by the Secretary of the Navy
    Inventors: Simin Feng, Kevin A. Boulais, Walter D. Sessions, Pearl Rayms-Keller, Robert B. Nichols, William F. Smith, Karen J. Long, Michael S. Lowry
  • Patent number: 10615506
    Abstract: A control device is provided for photonic switching. The device includes an optically tunable metamaterial unit cell. This structure includes a dielectric substrate; at least two arrays of metamaterial elements located on the top surface thereof, the metamaterial being capable of reflecting electromagnetic radiation, and a layer of photo-capacitive material overlapping the at least two arrays of metamaterial elements, the photo-capacitance of the photo-capacitive material being optically tunable; and a reflectarray or phased array system containing the unit cell.
    Type: Grant
    Filed: July 5, 2017
    Date of Patent: April 7, 2020
    Assignee: United States of America, as represented by the Secretary of the Navy
    Inventors: Simin Feng, Kevin A. Boulais, Walter D. Sessions, Pearl Rayms-Keller, Robert B. Nichols, William F. Smith, Karen J. Long, Michael S. Lowry
  • Patent number: 10230170
    Abstract: A metal lens is provided for length compacting a horn antenna across a frequency bandwidth. The metal lens includes a feed guide segment having an input cross-section, an intermediate segment, and an exit segment. The feed guide segment receives a signal from the horn antenna along a carry direction; an intermediate segment that expands from the input cross-section laterally to the carry direction. The intermediate segment incorporates an intermediate split vane perpendicular to the carry direction to divide the signal along the carry direction. The exit segment incorporates a plurality of terminating split vanes lateral to the carry direction for transmitting the output signals.
    Type: Grant
    Filed: July 10, 2017
    Date of Patent: March 12, 2019
    Assignee: The United States of America as represented by the Secretary of the Navy.
    Inventors: Kevin A. Boulais, Walter D. Sessions, Reniery Cevallos, Sarah C. Weston, Lucas R. Hale
  • Patent number: 10185911
    Abstract: A radio frequency identifier (RFID) tag is provided for receiving and reflecting electromagnetic energy at select frequency bands of visible and infrared wavelengths. The RFID tag includes an electrically conductive backplane; a dielectric substrate disposed on the backplane; a light guide film (LGF) disposed on the substrate, and metamaterial elements. The LGF has an exposed surface segregated into domains. The metamaterial devices are disposed on a domain. Each device is tuned to respond to a corresponding frequency among the select frequency bands.
    Type: Grant
    Filed: January 10, 2018
    Date of Patent: January 22, 2019
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Simin Feng, Kevin A. Boulais, Robert B. Nichols, Victor H. Gehman, Jr.
  • Patent number: 10186767
    Abstract: A metamaterial cloak is provided for extending deflection of an electromagnetic beam for a vertical beam angle other than bore sight. The cloak deflects an electromagnetic beam from a source in an environment and includes a laminate structure and an electromagnetic guide. The structure includes a plurality of conductive metal plates and metamaterial layers sandwiched therebetween within a planar shape. The electromagnetic guide is disposed around the laminate structure to provide a frontal face to the source. The guide matches impedance of the laminate structure.
    Type: Grant
    Filed: August 2, 2017
    Date of Patent: January 22, 2019
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Kevin A. Boulais
  • Publication number: 20180203189
    Abstract: A light transmission system is provided for operating an optically responsive circuit. The system includes a light guide film (LGF) to transmit light emitted from its edge, and a scattering node for directing the light to the circuit. The circuit is disposed on a proximate face of the LGF. The scattering node is disposed on a distal face of the LGF opposite the circuit. The circuit can be an integrated circuit, a light detection sensor or a photovoltaic cell.
    Type: Application
    Filed: August 18, 2016
    Publication date: July 19, 2018
    Applicant: United States of America, as represented by the Secretary of the Navy
    Inventors: Kevin A. Boulais, Michael H. Fugate, Simin Feng, Walter D. Sessions, Robert B. Nichols, Victor H. Gehman, JR.
  • Patent number: 10014587
    Abstract: Chaff is provided for deployment from an aerial platform for retro-reflecting electromagnetic radiation projected to the platform. The chaff includes a plurality of retro-reflecting particles, with each particle being a retro-reflector. The plurality forms a cloud having aerial buoyancy. The particles can be a corner reflector with adjacent sides substantially perpendicular to one another, and in particular a trihedral corner reflector. Alternatively, the particles can be lens reflectors, such as a cat's eye. In addition, chaff is provided for deployment from an aerial platform for retro-reflecting electromagnetic radiation projected to the platform. The chaff includes a plurality of retro-reflecting particles and a substrate. Each particle of the plurality is a retro-reflector. The substrate attaches the plurality of particles.
    Type: Grant
    Filed: August 18, 2016
    Date of Patent: July 3, 2018
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Kevin A. Boulais, Thomas L. Wilson
  • Publication number: 20180166596
    Abstract: A photoconductive device is provided for changing dielectric properties in response to select electromagnetic radiation. The device includes an optical core, an optical filter disposed on the core, and an optically clear insulator disposed on the filter. One example core is a quantum dot. Another example core is an optically clear core overlaid by a photoconductive coating disposed thereon.
    Type: Application
    Filed: May 23, 2017
    Publication date: June 14, 2018
    Applicant: United States of America, as represented by the Secretary of the Navy
    Inventors: Kevin A. Boulais, Michael S. Lowry, Simin Feng, Robert B. Nichols, Mark E. Preddy
  • Patent number: 9753185
    Abstract: A metamaterial control device is provided for controlling electromagnetic radiation. The device uses a light-guide film (LGF), with the LGF being capable of receiving light emission along an edge. The device includes a substrate disposed on a non-edges surface of the LGF, electromagnetic cellular structures that are controllable, and an optically sensitive component within some or all cells. The substrate is composed of metamaterial and having an interface that corresponds to an extractor on the non-edge surface for scattering light therefrom. Alternatively, the substrate can constitute the LGF itself. The cell structure is disposed around the extractor. The optically sensitive component is disposed to cover the extractor. The component changes in response to receiving the light from the extractor and changes in response to intensity of the light.
    Type: Grant
    Filed: August 19, 2015
    Date of Patent: September 5, 2017
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Kevin A. Boulais, Francisco Santiago, Charles E. Mannix
  • Publication number: 20170075038
    Abstract: A metamaterial control device is provided for controlling electromagnetic radiation. The device uses a light-guide film (LGF), with the LGF being capable of receiving light emission along an edge. The device includes a substrate disposed on a non-edges surface of the LGF, electromagnetic cellular structures that are controllable, and an optically sensitive component within some or all cells. The substrate is composed of metamaterial and having an interface that corresponds to an extractor on the non-edge surface for scattering light therefrom. Alternatively, the substrate can constitute the LGF itself. The cell structure is disposed around the extractor. The optically sensitive component is disposed to cover the extractor. The component changes in response to receiving the light from the extractor and changes in response to intensity of the light.
    Type: Application
    Filed: August 19, 2015
    Publication date: March 16, 2017
    Applicant: United States of America, as represented by the Secretary of the Navy
    Inventors: Kevin A. Boulais, Francisco Santiago, Charles E. Mannix
  • Patent number: 9524809
    Abstract: A dielectric composite material is provided for switch control by optical stimulus. The material includes a plurality of photo-conductive particulates; and a transparent binder for containing the plurality of particulates to form a photo-conductive pigment based matrix. The pigment based matrix is disposed on to overlap first and second separate electrodes to produce an electrical junction. Capacitance of the pigment based matrix changes from a first value absent the optical stimulus to a second value in response to illumination at a specific electromagnetic frequency and intensity by the optical stimulus.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: December 20, 2016
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Kevin A. Boulais, Simin Feng, Pearl Rayms-Keller, Michael S. Lowry, Francesco Santiago
  • Patent number: 9515390
    Abstract: An electromagnetic reflector for reflecting an electromagnetic signal is provided based on meta-surface phase control using photo-capacitive materials, varactors or other tuning means. The shape of the metamaterial unit cell enhances the resonance and phase shift. The reflector includes first and second cells having respective first and second phase states, along with a switch for selecting between the first and second cells.
    Type: Grant
    Filed: June 11, 2015
    Date of Patent: December 6, 2016
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Simin Feng, Kevin A. Boulais, Frank L. Wallace, Blaise L. Corbett, Victor H. Gehman, Jr.
  • Patent number: 9095043
    Abstract: A cloak is provided for concealing an object to an electromagnetic field. A first vane encloses the object and a second vane encloses the first vane. The distance between the first and second vanes varies relative to the object, so as to conceal the object to the electromagnetic field.
    Type: Grant
    Filed: February 27, 2013
    Date of Patent: July 28, 2015
    Assignee: The United States of America as Represented by the Secretary of the Navy
    Inventors: Kevin A. Boulais, Walter D. Sessions, Francisco Santiago, Pearl Rayms-Keller, Lucas R. Hale, Craig Andrew Calcagno
  • Publication number: 20140203819
    Abstract: A cloaked field sensor apparatus and system using a cloaking barrier sheath to substantially enclose the surface of a transmitter conduit exposed to an electromagnetic field being measured to reduce the field sensor's interference with the electromagnetic field being measured. Multiple cloaked field sensor apparatuses may be aligned in an array and use identical or different cloaking barrier sheaths.
    Type: Application
    Filed: August 24, 2011
    Publication date: July 24, 2014
    Applicant: United States Government, as represented by the Secretary of the Navy
    Inventors: Walter D. Sessions, Kevin A. Boulais, Jennifer K. Roames
  • Patent number: 8784704
    Abstract: A material is provided for switching dielectric constant between distinct first and second values responsive to electromagnetic radiation having a specified energy. The material includes a medium transparent to the radiation and a plurality of particulates. Each particulate has a dipole that assumes one of distinct first and second parameters that correspond to the first and second values. The particulates are suspended within the medium. The parameters are either dipole span or charge strength. The dipole of each particulate sets to the first parameter by default and sets to the second parameter in response to the radiation. The particulates can be composed from undoped semi-insulating gallium arsenide. The medium can be polymethylmethacrylate, for example.
    Type: Grant
    Filed: August 28, 2012
    Date of Patent: July 22, 2014
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Kevin A. Boulais, Pearl Rayms-Keller, Michael S. Lowry, Francisco Santiago, Karen J. Long, Walter D. Sessions, Natasha Laguodas Wilkerson, Reniery Cevallos
  • Publication number: 20140145870
    Abstract: A continuous wave electromagnetic apparatus is provided for emitting electronic interference against a target. The apparatus includes a several magnetrons that connect in series. The magnetrons are tuned to frequencies distinguishable from each other. Each magnetron generates a corresponding continuous wave signal at a corresponding wavelength. A multiplexer connects to the several magnetrons to concatenate each the signal into a combination signal. An emitter device connects to the multiplexer to discharge the combination signal towards the target.
    Type: Application
    Filed: November 26, 2012
    Publication date: May 29, 2014
    Applicant: United States Government, as represented by the Secretary of the Navy
    Inventor: Kevin A. Boulais
  • Publication number: 20140061507
    Abstract: A material is provided for switching dielectric constant between distinct first and second values responsive to electromagnetic radiation having a specified energy. The material includes a medium transparent to the radiation and a plurality of particulates. Each particulate has a dipole that assumes one of distinct first and second parameters that correspond to the first and second values. The particulates are suspended within the medium. The parameters are either dipole span or charge strength. The dipole of each particulate sets to the first parameter by default and sets to the second parameter in response to the radiation. The particulates can be composed from undoped semi-insulating gallium arsenide. The medium can be polymethylmethacrylate, for example.
    Type: Application
    Filed: August 28, 2012
    Publication date: March 6, 2014
    Applicant: United States Government, as Represented by the Secretary of the Navy
    Inventors: Kevin A. Boulais, Alfredo N. Rayms-Keller, Michael S. Lowry, Francisco Santiago, Karen J. Long, Walter D. Sessions, Natasha Laguodas Wilkerson, Reniery Cevallos
  • Patent number: 8519382
    Abstract: A photocapacitor device is provided for responding to a photon having at least a specified energy. The photocapacitive device includes a first portion composed of a photocapacitive material; a second portion composed of a non-photocapacitive material; and a depletion region disposed between the first and second portions. The photocapacitive and non-photocapacitive materials respectively have first and second Fermi-energy differences, with the second Fermi-energy difference being higher than the first Fermi-energy difference.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: August 27, 2013
    Assignee: The United States of America as Represented by the Secretary of the Navy
    Inventors: Kevin A. Boulais, Donald W. Rule, Karen J. Long, Francisco Santiago, Pearl Rayms-Keller, Victor H. Gehman, Jr.
  • Publication number: 20130076556
    Abstract: A millimeter wave method and apparatus for detecting objects on humans, for example, that might be hidden, for example, under the human's clothing includes an active w-band radiation source to illuminate the human subject; a diffuser on the active illumination source; a receiver to acquire an active mode and a passive mode image; apparatus and methods to minimize background environmental millimeter waves; and a device to form and display a differential image. The resulting differential image may show contraband at high resolution while avoiding display of the human anatomy.
    Type: Application
    Filed: September 26, 2011
    Publication date: March 28, 2013
    Applicant: United States Government, as represented by the Secretary of the Navy
    Inventors: Kevin A. Boulais, Edward R. Huber, Eric B. McDaniel, Jennifer K. Roames, Nancy A. Breaux, John Thaddeus Seeberger
  • Patent number: 8399817
    Abstract: A micro designator dart engages a target to allow for designation and tracking of the target by transmitting a radio-frequency identification code. The housing of the micro designator dart is configured to enclose its components and deform upon impact with a target to allow a target-engaging member to physically attach the micro designator dart to the target. Also upon impact with the target, an impact-sensitive triggering mechanism in the micro designator dart activates a power source, causing a transmitter to send a predetermined coded infrared signal to the seeker unit of a precision guided munitions system. The micro designator dart may also include a self-destruct device.
    Type: Grant
    Filed: August 12, 2011
    Date of Patent: March 19, 2013
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Alfredo N. Rayms-Keller, Francisco Santiago, Victor H. Gehman, Jr., Karen J. Long, Kevin A. Boulais, Peter L. Wick, Alexander Strugatsky