Patents Assigned to The United States of America as represented by the Secretary of the Air Force
  • Patent number: 10816649
    Abstract: In a polarimeter, a polarization modulator changes a polarization phase of an output optical pulse with a modulation function that varies in time over the duration of the optical pulse. A static polarization state analyzer, which includes a one or more static polarization component analyzers and detectors, receives the modulated optical pulse after interaction with a target medium and provides time varying intensities of the polarization components of the received pulse. A signal processing module determines a polarization property of the target medium, such as a Mueller matrix, dependent upon time varied intensities over the duration of the received optical pulse. A time-division optical multiplexer may be used to combine the outputs from multiple static polarization component analyzers to form a single time-multiplexed signal comprising a plurality of optical pulses that are separated in time and passed to a single photo-detector.
    Type: Grant
    Filed: January 24, 2018
    Date of Patent: October 27, 2020
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Christian Keyser, Richard Kenneth Martin
  • Patent number: 10812512
    Abstract: Systems and associated methods for detecting a set of spectrum sensing falsification (SSF) attacks in a geographic database (GDB) driven cognitive radio (CR) system. Viewing the GDB as a type of non-orthogonal compressive sensing (CS) dictionary, the composite power spectral density (PSD) estimate at a candidate CR is approximated by a small number of sensor nodes listed in the GDB. In a dense CR network, the PSD estimate at a CR may contain a composite mixture of spectrally overlapping signals. An implementation of an optimized, greedy algorithm orthogonal matching pursuit (OMP) returns a set of sensor nodes which are suspected to be in the vicinity of the CR. A sufficient match between the PSD estimate reported by a candidate CR and the PSD that is sparsely approximated from the SNs in its area provides confidence (trust) metrics which may be used to detect potential SSF attacks.
    Type: Grant
    Filed: October 11, 2018
    Date of Patent: October 20, 2020
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: John J. Kelly, Jonathan Ashdown
  • Patent number: 10809045
    Abstract: The forward firing fragmentation (FFF) munition includes a body, a flight system carried by the body and configured to maneuver the munition in flight, and a warhead carried by the body and including an explosive configured to detonate and expel fragments in a pattern. A near field barrier (near field barrier), such as the guidance system, is carried by the body in front of the warhead and communicatively coupled via a communication link to the flight system. A fragmentation adjustment system is configured to physically displace the near field barrier relative to the warhead while maintaining the communication link between the near field barrier and the flight system until detonation of the explosive.
    Type: Grant
    Filed: January 28, 2019
    Date of Patent: October 20, 2020
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Kaz I. Teope, Jacob B. Yarwood, Lucas A. Fumagalli, Kyle G. Senn, Philip T. Strunk, Michael L. Anderson
  • Patent number: 10809626
    Abstract: A vector partially coherent source (VPCS) generator includes a laser that emits coherent light; an interferometer consisting of polarizing beam splitters (PBSs) to split the laser light into its vertical and horizontal polarization components;] first and second spatial light modulators (SLMs) that respectively control the vertical and horizontal polarization components; and a control system communicatively coupled to the first and second SLMs to adjust beam shape and coherence without physically moving or removing optical elements in the interferometer.
    Type: Grant
    Filed: October 10, 2018
    Date of Patent: October 20, 2020
    Assignee: The United States of America as represented by the secretary of the Air Force
    Inventors: Milo W. Hyde, IV, Santasri R. Bose-Pillai
  • Patent number: 10811777
    Abstract: An antenna array including a foldable substrate having a plurality of fold lines arranged in a Miura-ori folding pattern, and a plurality of antenna elements interconnected by an electrical trace and disposed on the substrate, wherein the substrate containing the plurality of antenna elements is to fold according to a one-step Miura-ori folding pattern sequence, and wherein the plurality of antenna elements directs an antenna beam with a range of directivities caused by a folding of the substrate according to the one-step Miura-ori folding pattern sequence. The plurality of antenna elements may be non-overlapping prior to the folding of the substrate. The antenna beam may include a tunable radiation pattern that changes based on various stages of folding of the substrate containing the plurality of antenna elements.
    Type: Grant
    Filed: April 9, 2018
    Date of Patent: October 20, 2020
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventors: Kazuko Fuchi, Steven R. Seiler, Giorgio Bazzan, Philip R. Buskohl, Gregory W. Reich
  • Patent number: 10812500
    Abstract: A cyberthreat detection method and system includes a distributed file system and a commodity cluster. The commodity cluster has a plurality of servers. A data array of key-value pairs related to social media is received; it stores a plurality of predetermined ground predicates. A ground predicate graph is constructed for each user then partitioned into balanced portions Pi each corresponding to a server and the ground predicates stored on that server. In parallel on each server, a plurality of leaned rules are determined for the files stored on that server. From a union of the plurality of learned rules, the system determines a respective weight for each of the learned rules. The plurality of rules are ranked in order of accuracy by the plurality of weights.
    Type: Grant
    Filed: January 30, 2018
    Date of Patent: October 20, 2020
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Praveen Rao, Charles Kamhoua, Kevin Kwiat, Laurent Njilla
  • Patent number: 10800703
    Abstract: A rapid-setting composition includes fly ash and an activator solution for mixing with the fly ash. The activator solution has a silicate solution including a monovalent hydroxide. The activator solution when mixed with the fly ash produces a composition that has a final set time of no more than about 65 minutes.
    Type: Grant
    Filed: October 26, 2018
    Date of Patent: October 13, 2020
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Jeffery Eichler, Kara Griffith, Derek Lovingood, Michael Henley
  • Patent number: 10794871
    Abstract: An apparatus for non-destructive ultrasonic testing is disclosed that permits focused immersion measurements to be accomplished in a non-immersion, contact mode. The apparatus includes an adaptor for acoustically coupling an elastomeric body to a focused ultrasonic transducer via an acoustic couplant. The adaptor includes a housing for receiving the elastomeric body on one end, and the ultrasonic transducer on another end. A cavity is defined within the housing for receiving a liquid medium that acoustically couples the ultrasonic transducer to the elastomeric body. The elastomeric body has a frontal surface disposed at a face slant angle relative to a longitudinal axis, where the face slant angle can be optimized for the test material. The volume of the housing cavity may be adjusted so as to vary the focal length of the ultrasonic transducer.
    Type: Grant
    Filed: May 23, 2018
    Date of Patent: October 6, 2020
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: James L. Blackshire, Jeong K. Na
  • Patent number: 10793454
    Abstract: A reactor system for treating contaminated water is disclosed. The reactor system includes a reactor vessel having first and second end portions and an internal reactor volume defined by interior surfaces of the reactor vessel. A fluoropolymer coating is applied over at least a portion of the interior surfaces of the reactor vessel. The reactor system also includes a water inlet disposed in the first end portion and a water outlet disposed in the second end portion. At least one ultraviolet light-emitting diode (LED) is included and disposed so as to project ultraviolet light into the reactor vessel. A plurality of photo-catalyst substrates are also disposed within the internal reactor volume of the reactor vessel. Each of these substrates includes a coating of titanium dioxide applied to an outer surface of a substrate. A method for remediating contaminated water is also disclosed.
    Type: Grant
    Filed: February 22, 2018
    Date of Patent: October 6, 2020
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventors: Morgan Russell, John Stubbs, David Kempisty
  • Patent number: 10788347
    Abstract: An estimate of interfacial areas between the liquid and gas, liquid and wall, and gas and wall in two phase flow is determined using a standard 2D sensor in a fashion to infer 3D information about the liquid/vapor profile when the sensor length is much longer than the diameter. Cross-sectional flow areas for the gas and liquid are also estimated as a function of the axial dimension of the sensor, and the centroid of the mass in the sensor element can also be estimated. An electric capacitance tomography (ECT) system creates tomograms of the flow inside a sensor, and estimates of 3D physical area information are produced from the tomograms.
    Type: Grant
    Filed: July 19, 2017
    Date of Patent: September 29, 2020
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventor: Larry W. Byrd
  • Patent number: 10784011
    Abstract: A deformable yet mechanically resilient microcapsule having electrical properties, a method of making the microcapsules, and a circuit component including the microcapsules. The microcapsule containing a gallium liquid metal alloy core having from about 60 to about 100 wt. % gallium and at least one alloying metal, and a polymeric shell encapsulating the liquid core, said polymeric shell having conductive properties.
    Type: Grant
    Filed: May 22, 2018
    Date of Patent: September 22, 2020
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventors: Brad L Cumby, Christopher Tabor
  • Patent number: 10784245
    Abstract: An integrated circuit is provided including a first substrate with a first thermal conductivity. An active layer is deposited on the first substrate. At least one native device is fabricated on the active layer. A window is formed in the active layer, which exposes a portion of the first substrate. A non-native device is fabricated on a second substrate with a second thermal conductivity lower than the first thermal conductivity. The non-native device is flip-chip mounted in the widow on the first substrate and electrically connected to the at least one native device. The non-native device is also thermally connected to the first substrate such that heat generated by the non-native device is removed through the first substrate.
    Type: Grant
    Filed: June 10, 2019
    Date of Patent: September 22, 2020
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventor: Gregg H Jessen
  • Patent number: 10784173
    Abstract: A method of evaluating localized degradation of a III-V compound semiconductor. The method includes preparing first and second III-V compound semiconductors. The second III-V compound semiconductor that is similar to the first III-V compound semiconductor and further comprises a shield layer that is configured to alter exposed portions of channels of the second III-V compound semiconductor. The first and second III-V compound semiconductors and irradiated and then electrically tested. Results of the electrical testing of the first and second III-V compound semiconductors are compared.
    Type: Grant
    Filed: April 24, 2018
    Date of Patent: September 22, 2020
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventor: Eric Heller
  • Patent number: 10784549
    Abstract: An ultra-wideband linear-to-circular polarizer is disclosed. In accordance with embodiments of the invention, the polarizer includes a plurality of cascaded waveplates having biaxial permittivity or cascaded anisotropic sheet impedances. Each waveplate/sheet has a principal axis rotated at different angles relative to an adjacent waveplate/sheet about a z-axis of a 3-dimensional x, y, z coordinate system. Each waveplate is composed of a unit cell of an artificial anisotropic dielectric. Each sheet impedance is composed of an anisotropic metallic pattern. The polarizer further includes impedance matching layers disposed adjacent the cascaded waveplates/sheets.
    Type: Grant
    Filed: November 13, 2018
    Date of Patent: September 22, 2020
    Assignee: The United States of America, as represented by the Secretary of the Air Force
    Inventors: Boris Tomasic, Carl R. Pfeiffer, Thomas P. Steffen
  • Patent number: 10778263
    Abstract: In accordance with various embodiments of the disclosed subject matter, a system, apparatus and method is configured to provide a poly-phased, time-interleaved radio frequency (RF) digital-to-analog converter (DAC) suitable for use in radar, radio, mobile and other RF systems.
    Type: Grant
    Filed: February 18, 2020
    Date of Patent: September 15, 2020
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventors: Vipul J. Patel, John M Emmert, Waleed Khalil
  • Patent number: 10777696
    Abstract: A ternary superlattice structure includes a substrate and periodic layer structure on the substrate and having alternating infrared absorbing semiconductor materials having a first layer of InAs[1-x]Sb[x] ternary alloy material, and a second layer of In[1-y]Z[y]As ternary alloy material, wherein Z is Ga or Al, wherein x is in a range of greater than zero and less than one, wherein y is in a range of greater than zero and less than one, and wherein a thickness of each of the first and second layers are substantially similar and configured to absorb light in a predetermined spectral band and prevent trapping of carriers in any particular layer. In examples, y is in a range from about 0.05 to about 0.35, and x is in a range of about 0.2 to about 0.8.
    Type: Grant
    Filed: July 23, 2019
    Date of Patent: September 15, 2020
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventors: Gamini Ariyawansa, Charles J. Reyner, John E. Scheihing, Joshua M. Duran
  • Patent number: 10761391
    Abstract: A device includes a number of grating stages having a liquid crystal layer disposed between at least two substrates, where at least one is coated with a photo-alignment layer and transparent electrodes. Each grating stage may be switchably responsive to a voltage, with grating periods of each grating stage selected such that, when the voltage is applied to a grating stage and a laser beam is passed therethrough, optical energy from the laser beam in plus and minus first orders is deflected toward sides of the grating stage and optical energy from a zero order of the laser beam is allowed to pass through the grating stage. A polarization state of the laser beam may be maintained from an input through an output. Each grating stage may include a thickness selected to achromatize the laser beam through the grating stages.
    Type: Grant
    Filed: August 29, 2017
    Date of Patent: September 1, 2020
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Joshua Lentz
  • Patent number: 10729650
    Abstract: A method of preparing a wound model. The method includes simulating a non-healing wound edge, simulating eschar, simulating a fibrin layer, simulating biofilm, and simulating foreign debris.
    Type: Grant
    Filed: January 19, 2018
    Date of Patent: August 4, 2020
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventors: Thomas Shaak, Suizhao Wang, Joseph Harre
  • Patent number: 10731077
    Abstract: A shape-programmable liquid crystal elastomer comprises polymerized, nematic monomers. The monomers are organized into a plurality of voxels with each voxel having a director orientation.
    Type: Grant
    Filed: January 23, 2018
    Date of Patent: August 4, 2020
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventors: Timothy J. White, Taylor H. Ware, Michael E. McConney, Jeong Jae Wie, Suk-Kyun Ahn
  • Patent number: 10731000
    Abstract: A sulfonyl-substituted polyphenylene-ether polymer having improved dielectric properties and methods for making the same. The sulfonyl-substituted PPE include sulfone-containing polyphenylene oxides (“PPO”) polymers having repeating units of the formulas: wherein each of R1 and R2 is H or an alkyl group containing from 1 to 4 carbon atoms, R3 is an alkylene group containing from 1 or 2 carbon atoms, R4 is selected from a group consisting of an alkyl group containing from 1 to 4 carbon atoms, an aryl group, and CF3, and X is a halogen atom. The subscript n is 0 or 1; the subscript m is 1 or 2, provided that when m is 2, R2 is H. A degree of polymerization ranges from about 5 to about 1,000, and a ratio of units having formula (1) to units having formula (2) of the sulfone-containing PPO polymer ranges from about 10:90 to about 90:10.
    Type: Grant
    Filed: May 17, 2019
    Date of Patent: August 4, 2020
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventors: Loon-Seng Tan, David Huabin Wang, Lei Zhu