Patents Assigned to Northrop Grumman Systems Corporation
  • Patent number: 10379311
    Abstract: An over-molded multi-optical ribbon fiber assembly comprises a housing over-mold including a middle section having first and second ends that branch into first legs and second legs, respectively. The assembly further comprises multiple sets of optical fibers. The optical fibers of all of the sets extend through the middle section as individual optical fibers in a non-ribbon fiber, stacked configuration. The optical fibers of each set further: extend through a respective first leg and a respective second leg of the housing; extend past a free-end of the respective first leg, and transition to a respective first ribbon fiber outside of the housing; and extend past a free-end of the respective second leg, and transition to a respective second ribbon fiber outside of the housing. The assembly further comprises multiple optical fiber connectors each terminating a respective one of the first and second ribbon fibers.
    Type: Grant
    Filed: April 4, 2018
    Date of Patent: August 13, 2019
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: Jason Krywicki, Gregg A. Robertson, Stephen E. Krug
  • Publication number: 20190245544
    Abstract: A Josephson inverter gate circuit provides efficient implementation of polarity or logical inversion while eliminating the need for physically large high-efficiency magnetic transformers in the signal path. The circuit can consist of a half-twisted Josephson transmission line (JTL) or a JTL with an unshunted floating Josephson junction that produces two single flux quantum (SFQ) pulses when triggered by an SFQ input signal, which results in an output SFQ signal of reversed polarity. Implemented as a logical inverter, proper initialization of the circuit is accomplished within the signal inversion stage with flux biasing.
    Type: Application
    Filed: July 27, 2018
    Publication date: August 8, 2019
    Applicant: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventor: QUENTIN P. HERR
  • Publication number: 20190242988
    Abstract: Systems and methods are provided for tracking moving objects from a set of measurements. An estimate of a posterior probability distribution for a plurality of track states is determined from an estimate of the posterior probability distribution for a plurality of possible assignments of the set of measurements to a set of tracks representing trajectories of the plurality of moving objects and the set of measurements. A new estimate of the posterior probability distribution for the assignments is determined from the measurements and the estimate of a posterior probability distribution for the track states. A variational lower bound is determined from the new estimate of the posterior probability distribution for the assignments, the estimate of the posterior probability distribution for the track states, and the set of measurements. These steps are iteratively repeated until the variational lower bound is less than a threshold value.
    Type: Application
    Filed: April 16, 2019
    Publication date: August 8, 2019
    Applicant: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: RYAN D. TURNER, STEVEN BOTTONE, BHARGAV R. AVASARALA, CLAY J. STANEK
  • Publication number: 20190238137
    Abstract: Superconducting methods of determining AND, OR, AND-OR, and OR-AND logic values use single flux quantum (SFQ) pulses to assert logical inputs of a reciprocal quantum logic (RQL) gate by placing currents in input storage loops in the RQL gate and, based on the currents in the storage loops, triggering logical decision Josephson junctions (JJs) in the gate, such that an assertion or de-assertion signal corresponding to the logical function of the gate is observed at the output. The methods permit for outputs based on at least four logical inputs to be achieved.
    Type: Application
    Filed: August 13, 2018
    Publication date: August 1, 2019
    Applicant: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: JACK R. POWELL, III, ALEXANDER L. BRAUN
  • Publication number: 20190237648
    Abstract: Methods and apparatuses are provided for controlling the state of a qubit. A qubit apparatus includes a load, a qubit, and a compound Josephson junction coupler coupling the qubit to the load. A coupling controller controls the coupling strength of the compound Josephson junction coupler such that a coupling between the qubit and the load is a first value when a reset of the qubit is desired and a second value during operation of the qubit.
    Type: Application
    Filed: February 1, 2018
    Publication date: August 1, 2019
    Applicant: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: ANTHONY JOSEPH PRZYBYSZ, JOEL D. STRAND
  • Patent number: 10367483
    Abstract: One embodiment describes a Josephson current source system comprising a flux-shuttle loop that is inductively coupled with an AC input signal. The flux-shuttle loop includes a plurality of stages each comprising at least one Josephson junction. The plurality of stages can be spaced about the flux shuttle loop. Each of a plurality of pairs of the plurality of stages are configured to concurrently trigger in a sequence via the respective at least one Josephson junction in response to the AC input signal and to provide a respective pair of single-flux quantum (SFQ) pulses that move sequentially and continuously through each stage of the plurality of stages around the flux-shuttle loop via each of the at least one Josephson junction of each of the respective stages that results in a DC output current being provided through an output inductor.
    Type: Grant
    Filed: December 20, 2018
    Date of Patent: July 30, 2019
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: Quentin P. Herr, Anna Y. Herr, Donald L. Miller, Christopher S. Bulla, Theodore R. Blank
  • Patent number: 10365346
    Abstract: A small, ultra-light-weight star tracker for space applications uses an out-of-field rejection filter to reduce the physical size and mass of the star tracker by effectively eliminating the need for a sun shade. The out-of-field rejection filter combines a converter for converting randomly polarized light to p-polarized light with an angular selectivity filter that can reject out-of-field p-polarized light. The underside of the angular selectivity filter can be used to reflect a calibrated light source into the optical path.
    Type: Grant
    Filed: June 15, 2017
    Date of Patent: July 30, 2019
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventor: Kevin J. Romero
  • Patent number: 10366340
    Abstract: Systems and methods are provided for readout of a qubit. A readout resonator is coupled to a transmission line and a compound Josephson junction coupler couples the qubit to the readout resonator. A coupling controller controls the coupling strength of the compound Josephson junction coupler such that a coupling between the qubit and the readout resonator is a first value when a state of the qubit is being read and a second value during operation of the qubit.
    Type: Grant
    Filed: July 12, 2017
    Date of Patent: July 30, 2019
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventor: Anthony Joseph Przybysz
  • Patent number: 10352632
    Abstract: A system includes a matrix material to remove heat from an object. The matrix material includes a plurality of vascular structures. Each of the vascular structures are filled with a fluid. At least one transducer generates field-induced forces into the fluid within the vascular structures of the matrix material. At least one controller pulses the transducer to generate the field-induced forces into the fluid within the vascular structures. The field-induced forces generate fluid flow within the vascular structures to remove the heat from the object.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: July 16, 2019
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: Theresa H. Suloway, Sameh S. Wanis
  • Patent number: 10355677
    Abstract: One example includes a current driver system. The system includes a current source configured to provide a source current to a transition node. The system also includes a Josephson latch comprising at least one Josephson junction stage. The at least one Josephson junction stage can be configured to conduct the source current from the transition node as a current-clamped bias current in a deactivated state of the Josephson latch. The Josephson latch can be configured to activate in response to the bias current and a trigger pulse to switch the at least one Josephson junction stage to a voltage state to conduct at least a portion of the source current from the transition node as an output current to a load in response to activation of the Josephson latch.
    Type: Grant
    Filed: October 3, 2018
    Date of Patent: July 16, 2019
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: Donald L. Miller, Quentin P. Herr
  • Patent number: 10351223
    Abstract: One example includes an altitude control system arranged in a balloon. The system includes a transparent outer chamber configured to receive incident infrared radiation. The system also includes an inner chamber comprising suspended particles configured to change the optical transmission of the inner chamber between a first state having a first transmissivity and a second state having a second transmissivity. The first transmissivity is greater than the second transmissivity. The system further includes a state controller configured to electrically activate the suspended particles to change the optical transmission of the inner chamber from the first state to the second state to change an altitude of the balloon based on the incident infrared radiation.
    Type: Grant
    Filed: September 14, 2016
    Date of Patent: July 16, 2019
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: Taylor Evan Matthews, Anthony Paul Fry, Jessica Marie Lavigne, Rafy Uddin Athar
  • Patent number: 10355696
    Abstract: A Josephson inverter gate circuit provides efficient implementation of polarity or logical inversion while eliminating the need for physically large high-efficiency magnetic transformers in the signal path. The circuit can consist of a half-twisted Josephson transmission line (JTL) or a JTL with an unshunted floating Josephson junction that produces two single flux quantum (SFQ) pulses when triggered by an SFQ input signal, which results in an output SFQ signal of reversed polarity. Implemented as a logical inverter, proper initialization of the circuit is accomplished within the signal inversion stage with flux biasing.
    Type: Grant
    Filed: July 27, 2018
    Date of Patent: July 16, 2019
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventor: Quentin P. Herr
  • Patent number: 10353844
    Abstract: A tunable bus-mediated coupling system is provided that includes a first input port coupled to a first end of a variable inductance coupling element through a first resonator and a second input port coupled to a second end of the variable inductance coupling element through a second resonator. The first input port is configured to be coupled to a first qubit, and the second output port is configured to be coupled to a second qubit. A controller is configured to control the inductance of the variable inductance coupling element between a low inductance state to provide strong coupling between the first qubit and the second qubit and a high inductance state to provide isolation between the first qubit and the second qubit.
    Type: Grant
    Filed: July 3, 2018
    Date of Patent: July 16, 2019
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: Ofer Naaman, Zachary Kyle Keane, Micah John Atman Stoutimore, David George Ferguson
  • Publication number: 20190214971
    Abstract: A capacitively-driven tunable coupler includes a coupling capacitor connecting an open end of a quantum object (i.e., an end of the object that cannot have a DC path to a low-voltage rail, such as a ground node, without breaking the functionality of the object) to an RF SQUID having a Josephson element capable of providing variable inductance and therefore variable coupling to another quantum object.
    Type: Application
    Filed: January 11, 2018
    Publication date: July 11, 2019
    Applicant: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventor: ZACHARY KYLE KEANE
  • Patent number: 10337867
    Abstract: An apparatus includes a symmetrical wavelength multiplexor (SWM) that includes a first port that receives a depolarized beam of light of a first center wavelength for a first wavelength range. A second port of the SWM receives a second center wavelength of light for a second wavelength range that is greater than the first wavelength range. A third port of the SWM provides a substantially symmetrical wavelength output to drive a fiber optic gyroscope (FOG) in accordance with the second center wavelength. The depolarized beam of light of the first center wavelength travels from the first port to the second port of the SWM and light of the second center wavelength travels from the second port to the third port of the SWM. The SWM mitigates spectral asymmetries between orthogonal axes of the second wavelength.
    Type: Grant
    Filed: April 13, 2018
    Date of Patent: July 2, 2019
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: Bassam S. Dimashkie, Steven M. Kim, Manfred Schiruska
  • Patent number: 10338213
    Abstract: A system for providing an estimate of far-field radar cross-section (RCS) measurements of an aircraft. The system includes a plurality of automatic guided vehicles (AGV) each including a robot arm and a radar unit selectively mounted thereto and being interchangeable with a camera. Each AGV includes an AGV controller for controlling the robot arm, the radar unit and the camera so as to cause the radar unit to provide the near-field RCS measurements or the camera to provide images of the aircraft. The system further includes a real time signature diagnostic sub-system (SDS-RT) responsive to the near-field RCS measurement signals from the radar units and the images from the cameras in real time, and an SDS controller responsive to re-configured near-field RCS measurement signals and images from the SDS-RT and configuring the near-field RCS measurement signals and the images into the estimate of the far-field RCS measurements of the aircraft.
    Type: Grant
    Filed: February 2, 2017
    Date of Patent: July 2, 2019
    Assignee: Northrop Grumman Systems Corporation
    Inventors: Martin T. Faulhaber, Robert A. Scow, Richard Warren
  • Patent number: 10340852
    Abstract: An amplification system can include a bias booster circuit and an amplifier that amplifies an input signal to drive a load. The bias boosting circuit can include a negative bias booster that applies a charge to an input node of the amplifier in response to a negative half-cycle of the input signal that exceeds a boost threshold level. The bias boosting circuit can also include a positive bias booster that discharges the input node of the amplifier during a positive half-cycle of the input signal that exceeds the boost threshold level. The discharging by the positive bias booster is slower than the charging by the negative bias booster to induce a bias voltage increase from a quiescent bias voltage on the input node of the amplifier.
    Type: Grant
    Filed: October 13, 2017
    Date of Patent: July 2, 2019
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: Sifen Luo, Scott Kent Suko, Jose M. Acevedo, Macarious Salib
  • Patent number: 10342151
    Abstract: A method of maintaining a circuit card in a card rack and a circuit card rack system are disclosed. A card rack including a laterally oriented clamping slot is provided. The clamping slot is at least partially formed from a temperature-contractible material. A circuit card having a clamped side region is provided. At least a portion of the clamped side region is inserted into the clamping slot. A predetermined temperature differential is applied to the clamping slot to reduce a longitudinal dimension of at least a portion of the clamping slot. A compressive force is exerted on the portion of the clamped side region which is located longitudinally within the clamping slot, via thermal expansion of the clamping slot.
    Type: Grant
    Filed: November 1, 2018
    Date of Patent: July 2, 2019
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: Martin Brokner Christiansen, Leonard George Chorosinski, H. Craig Heffner, Stanley Katsuyoshi Wakamiya
  • Patent number: 10340570
    Abstract: An exemplary electronic assembly includes a planar semiconductor substrate having a front side with semiconductor components and a back side that includes one recess extending inwardly. One of an isolator and circulator is formed as part of the planar semiconductor substrate and includes one magnetic ferrite disk mounted within the one recess within the thickness of the planar semiconductor substrate. The one of an isolator and circulator has at least input and output ports. The input port is disposed to receive a radio frequency signal to be coupled with low insertion loss to the output port while providing high insertion loss to other radio frequency signals attempting to propagate from the output port to the input port.
    Type: Grant
    Filed: October 26, 2017
    Date of Patent: July 2, 2019
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: Dino Ferizovic, Alexis Zamora, Benjamin Poust
  • Patent number: 10340568
    Abstract: An apparatus includes a top conductive layer of on an integrated circuit waveguide filter and a bottom conductive layer. The top and bottom conductive layers are coupled via a plurality of couplers that form an outline of the waveguide filter. A dielectric substrate layer is disposed between the top conductive layer and the bottom conductive layer of the integrated circuit waveguide filter. The dielectric substrate layer has a relative permittivity, ?r that affects the tuning of the integrated circuit waveguide filter. At least one tunable via includes a tunable material disposed within the dielectric substrate layer and is coupled to a set of electrodes. The set of electrodes enable a voltage to be applied to the tunable material within the tunable via to change the relative permittivity of the dielectric substrate layer and to enable tuning the frequency characteristics of the integrated circuit waveguide filter.
    Type: Grant
    Filed: June 14, 2018
    Date of Patent: July 2, 2019
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: Matthew S. Torpey, Benjamin Andrew Copley, Jeffrey David Hartman, Wayne Stephen Miller