Patents by Inventor Daniel F. Sievenpiper

Daniel F. Sievenpiper 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: 20180145193
    Abstract: A radio frequency transparent photovoltaic cell includes a back contact layer formed of an electrically conductive material, at least one aperture formed in the back contact layer, and at least one photovoltaic cell section disposed on the back contact layer. An airship includes one or more radio frequency antennas disposed in an interior of the airship. One or more radio frequency transparent photovoltaic cells are disposed on an outer surface of the airship.
    Type: Application
    Filed: January 5, 2018
    Publication date: May 24, 2018
    Inventors: Daniel F. Sievenpiper, Michael Wechsberg, Fangchou Yang
  • Publication number: 20180130915
    Abstract: A radio frequency transparent photovoltaic cell includes a back contact layer formed of an electrically conductive material, at least one aperture formed in the back contact layer, and at least one photovoltaic cell section disposed on the back contact layer. An airship includes one or more radio frequency antennas disposed in an interior of the airship. One or more radio frequency transparent photovoltaic cells are disposed on an outer surface of the airship.
    Type: Application
    Filed: January 5, 2018
    Publication date: May 10, 2018
    Inventors: Daniel F. Sievenpiper, Michael Wechsberg, Fangchou Yang
  • Patent number: 9893217
    Abstract: A radio frequency transparent photovoltaic cell includes a back contact layer formed of an electrically conductive material, at least one aperture formed in the back contact layer, and at least one photovoltaic cell section disposed on the back contact layer. An airship includes one or more radio frequency antennas disposed in an interior of the airship. One or more radio frequency transparent photovoltaic cells are disposed on an outer surface of the airship.
    Type: Grant
    Filed: August 14, 2014
    Date of Patent: February 13, 2018
    Assignee: RAYTHEON COMPANY
    Inventors: Daniel F. Sievenpiper, Michael Wechsberg, Fangchou Yang
  • Publication number: 20140352755
    Abstract: A radio frequency transparent photovoltaic cell includes a back contact layer formed of an electrically conductive material, at least one aperture formed in the back contact layer, and at least one photovoltaic cell section disposed on the back contact layer. An airship includes one or more radio frequency antennas disposed in an interior of the airship. One or more radio frequency transparent photovoltaic cells are disposed on an outer surface of the airship.
    Type: Application
    Filed: August 14, 2014
    Publication date: December 4, 2014
    Inventors: Daniel F. Sievenpiper, Michael Wechsberg, Fangchou Yang
  • Patent number: 8853528
    Abstract: A radio frequency transparent photovoltaic cell includes a back contact layer formed of an electrically conductive material, at least one aperture formed in the back contact layer, and at least one photovoltaic cell section disposed on the back contact layer. An airship includes one or more radio frequency antennas disposed in an interior of the airship. One or more radio frequency transparent photovoltaic cells are disposed on an outer surface of the airship.
    Type: Grant
    Filed: March 25, 2010
    Date of Patent: October 7, 2014
    Assignee: Raytheon Company
    Inventors: Daniel F. Sievenpiper, Michael Wechsberg, Fangchou Yang
  • Patent number: 8339320
    Abstract: An apparatus and methods for operating a frequency selective surface are disclosed. The apparatus can be tuned to an on/off state or transmit/reflect electromagnetic energy in any frequency. The methods disclosed teach how to tune the frequency selective surface to an on/off state or transmit/reflect electromagnetic energy in any frequency.
    Type: Grant
    Filed: October 11, 2011
    Date of Patent: December 25, 2012
    Assignee: HRL Laboratories, LLC
    Inventor: Daniel F. Sievenpiper
  • Patent number: 8212739
    Abstract: A tunable impedance surface capable of steering a multiband radio frequency beam in two different, independently band-wise controllable directions. The tunable surface has a ground plane and a plurality of first conductive elements disposed in a first array a first distance therefrom, the first distance being less than a wavelength of a lower frequency band of the multiband radio frequency beam. A first capacitor arrangement controllably varies capacitance between selected ones of the first conductive elements. A plurality of second conductive elements are disposed in a second array a second distance from the plurality of first conductive elements, the second distance being less than a wavelength of a higher frequency band of the multiband radio frequency beam, the plurality of first conductive elements serving as a ground plane for the plurality of second conductive elements. A second capacitor arrangement controllably varies capacitance between selected ones of the second conductive elements.
    Type: Grant
    Filed: May 15, 2007
    Date of Patent: July 3, 2012
    Assignee: HRL Laboratories, LLC
    Inventor: Daniel F. Sievenpiper
  • Publication number: 20120026068
    Abstract: An apparatus and methods for operating a frequency selective surface are disclosed. The apparatus can be tuned to an on/off state or transmit/reflect electromagnetic energy in any frequency. The methods disclosed teach how to tune the frequency selective surface to an on/off state or transmit/reflect electromagnetic energy in any frequency.
    Type: Application
    Filed: October 11, 2011
    Publication date: February 2, 2012
    Applicant: HRL LABORATORIES, LLC
    Inventor: Daniel F. Sievenpiper
  • Patent number: 8098187
    Abstract: An imager comprising a sphere of dielectric material and a geodesically configured substrate disposed adjacent said sphere. The geodesically configured substrate comprises a plurality of triangularly shaped elements, at least selected ones of the triangularly shaped elements having an array of detectors disposed thereon, the detectors in the array also being disposed adjacent the dielectric sphere for receiving and detecting incoming electromagnetic waves delivered via said sphere.
    Type: Grant
    Filed: August 6, 2010
    Date of Patent: January 17, 2012
    Assignee: HRL Laboratories, LLC
    Inventors: Jonathan J. Lynch, James H. Schaffner, Phillip H. Lawyer, Daniel F. Sievenpiper
  • Patent number: 8063833
    Abstract: Methods for tuning at least a region of a tunable frequency selective surface. The methods disclosed how to achieve an opaque or absorptive state in at least a region of tunable frequency selective surface.
    Type: Grant
    Filed: September 21, 2009
    Date of Patent: November 22, 2011
    Assignee: HRL Laboratories, LLC
    Inventor: Daniel F. Sievenpiper
  • Patent number: 8059045
    Abstract: An antenna having an impedance matching section for attaching to a sheet or a garment. The antenna has a first, a second, and a third leaky substantially coaxial conductor. The first and the third coaxial conductors have an electrically conductive layer placed on the dielectric in a double helix. The second coaxial conductor has an electrically conductive layer placed on the dielectric in a single helix. The first coaxial conductor is coupled to the second coaxial conductor, the second coaxial conductor is coupled to the third coaxial conductor; and the third coaxial conductor is coupled in use to a first termination impedance. Methods to make the foregoing structures are also described.
    Type: Grant
    Filed: August 18, 2008
    Date of Patent: November 15, 2011
    Assignee: HRL Laboratories, LLC
    Inventors: James H. Schaffner, Tsung-Yuan Hsu, Daniel F. Sievenpiper
  • Publication number: 20110233324
    Abstract: A radio frequency transparent photovoltaic cell includes a back contact layer formed of an electrically conductive material, at least one aperture formed in the back contact layer, and at least one photovoltaic cell section disposed on the back contact layer. An airship includes one or more radio frequency antennas disposed in an interior of the airship. One or more radio frequency transparent photovoltaic cells are disposed on an outer surface of the airship.
    Type: Application
    Filed: March 25, 2010
    Publication date: September 29, 2011
    Inventors: Daniel F. Sievenpiper, Michael Wechsberg, Fangchou Yang
  • Patent number: 7965220
    Abstract: A chaff element for interfering with radar signals. The chaff element has a dielectric substrate and a pair of elongate electrically conductive elements, having a total length of approximately one-half wavelength of the radar signals or otherwise tuned to the radar signals, disposed on the dielectric substrate. A switch is arranged to electrically couple the pair of elongate elements together in response to a control signal generated by an oscillator circuit and a battery. The chaff element can be used in a method of providing a countermeasure against radar signals. A plurality of chaff elements can be deployed in an airspace above a radar unit emitting a radar signal and interfere with the radar signal by opening and closing the switches of the chaff elements while deployed in said airspace above the radar unit.
    Type: Grant
    Filed: April 3, 2009
    Date of Patent: June 21, 2011
    Assignee: HRL Laboratories, LLC
    Inventors: Matthew W. Ganz, James H. Schaffner, Daniel F. Sievenpiper, Richard P. Berg
  • Patent number: 7929147
    Abstract: A method and system for determining an optimized artificial impedance surface is disclosed. An artificial impedance pattern is calculated on an impedance surface using an optical holographic technique given an assumed surface wave profile and a desired far field radiation pattern. Then, an actual surface wave profile produced on the impedance surface from the artificial impedance pattern, and an actual far field radiation pattern produced by the actual surface wave profile are calculated. An optimized artificial impedance pattern is then calculated by iteratively re-calculating the artificial impedance pattern from the actual surface wave profile and the desired far field radiation pattern. An artificial impedance surface is determined by mapping the optimized artificial impedance pattern onto a representation of a physical surface.
    Type: Grant
    Filed: May 31, 2008
    Date of Patent: April 19, 2011
    Assignee: HRL Laboratories, LLC
    Inventors: Bryan H. Fong, Joseph S. Colburn, John Ottusch, Daniel F. Sievenpiper, John L. Visher
  • Patent number: 7911407
    Abstract: A method for designing artificial impedance surfaces is disclosed. The method involves matching impedance component values required for a given far-field radiation pattern (determined, for example, by holographic means) with measured or simulated impedance component values for the units of a lattice of conductive structures used to create an artificial impedance surface, where the units of the lattice have varied geometry. For example, a unit could be a square conductive structure with a slice (removed or missing material) through it. The measured or simulated impedance components are determined by measuring wavevector values for test surfaces in three or more directions over any number of test surfaces, where each unit of a given test surface has the same geometric shape and proportions as all of the other units of that test surface, but each test surface has some form of variation in the unit geometry from the other test surfaces. These test measurements create a table of geometry vs.
    Type: Grant
    Filed: June 12, 2008
    Date of Patent: March 22, 2011
    Assignee: HRL Laboratories, LLC
    Inventors: Bryan Ho Lim Fong, Joseph S. Colburn, Paul R. Herz, John J. Ottusch, Daniel F. Sievenpiper, John L. Visher
  • Patent number: 7868829
    Abstract: A reflectarray is disclosed. The reflectarray includes a first array of conductive patches supported by a substrate, wherein each conductive patch in the first array has a first center line along a Y-direction and a second centerline along an X-direction, a plurality of first variable capacitors, wherein each first variable capacitor is electrically coupled to one of the conductive patches in the first array along the first centerline, and a plurality of second variable capacitors, wherein each second variable capacitor is electrically coupled to one of the conductive patches in the first array along the second centerline.
    Type: Grant
    Filed: March 21, 2008
    Date of Patent: January 11, 2011
    Assignee: HRL Laboratories, LLC
    Inventors: Joseph S. Colburn, Daniel F. Sievenpiper, Sarabjit Mehta
  • Patent number: 7835600
    Abstract: A method of and apparatus for modulating an optical carrier by an incident electromagnetic field. The electromagnetic field propagates in a dielectric-filled transverse electromagnetic waveguide, At least one slice of an electro-optic material is disposed in the dielectric-filled transverse electromagnetic waveguide, the electro-optic material in the dielectric-filled transverse electromagnetic waveguide having at least one optical waveguide therein which has at least a major portion thereof guiding light in a direction orthogonal with respect to a direction in which the dielectric-filled transverse electromagnetic waveguide guides the incident electromagnetic field. Light is caused to propagate in the at least one optical waveguide in the at least one slice of an electro-optic material in the dielectric-filled transverse electromagnetic waveguide for modulation by the incident electromagnetic field.
    Type: Grant
    Filed: July 18, 2008
    Date of Patent: November 16, 2010
    Assignee: HRL Laboratories, LLC
    Inventors: Daniel Yap, James H. Schaffner, Daniel F. Sievenpiper, Kevin Geary, Willie W. Ng, Daniel J. Gregoire, Joseph S. Colburn
  • Patent number: 7830310
    Abstract: An artificial impedance structure and a method for manufacturing same. The structure contains a dielectric layer having generally opposed first and second surfaces, a conductive layer disposed on the first surface, and a plurality of conductive structures disposed on the second surface to provide a preselected impedance profile along the second surface.
    Type: Grant
    Filed: July 1, 2005
    Date of Patent: November 9, 2010
    Assignee: HRL Laboratories, LLC
    Inventors: Daniel F. Sievenpiper, Joseph S. Colburn, Bryan Ho Lim Fong, Matthew W. Ganz, Mark F. Gyure, Jonathan J. Lynch, John Ottusch, John L. Visher
  • Patent number: 7796080
    Abstract: An imager comprising a sphere of dielectric material and a geodesically configured substrate disposed adjacent said sphere. The geodesically configured substrate comprises a plurality of triangularly shaped elements, at least selected ones of the triangularly shaped elements having an array of detectors disposed thereon, the detectors in the array also being disposed adjacent the dielectric sphere for receiving and detecting incoming electromagnetic waves delivered via said sphere.
    Type: Grant
    Filed: December 8, 2004
    Date of Patent: September 14, 2010
    Assignee: HRL Laboratories, LLC
    Inventors: Jonathan J. Lynch, James H. Schaffner, Phillip H. Lawyer, Daniel F. Sievenpiper
  • Publication number: 20100073261
    Abstract: An apparatus and methods for operating a frequency selective surface are disclosed. The apparatus can be tuned to an on/off state or transmit/reflect electromagnetic energy in any frequency. The methods disclosed teach how to tune the frequency selective surface to an on/off state or transmit/reflect electromagnetic energy in any frequency.
    Type: Application
    Filed: September 21, 2009
    Publication date: March 25, 2010
    Applicant: HRL LABORATORIES, LLC
    Inventor: Daniel F. SIEVENPIPER