For Aircraft Or Missile Patents (Class 342/2)
  • Patent number: 10351077
    Abstract: A vehicle member includes: a film-shaped part that is semitransparent and has electric-wave transmittance; a glossy film disposed on a first side of the film-shaped part; and a surface member that is optically transparent, is integrated with the film-shaped part, and covers a second side of the film-shaped part.
    Type: Grant
    Filed: July 14, 2016
    Date of Patent: July 16, 2019
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Takeshi Yamada, Takayuki Matsuo
  • Patent number: 10315587
    Abstract: A vehicle member includes: a film-shaped part that is semitransparent and has electric-wave transmittance; a glossy film disposed on a first side of the film-shaped part; and a surface member that is optically transparent, is integrated with the film-shaped part, and covers a second side of the film-shaped part.
    Type: Grant
    Filed: July 14, 2016
    Date of Patent: June 11, 2019
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Takeshi Yamada, Takayuki Matsuo
  • Patent number: 10135148
    Abstract: A reconfigurable holographic antenna includes a waveguide and a metamaterial layer. The metamaterial layer includes an array of tunable slots. In one embodiment, the array of tunable slots is configurable to generate holographic diffraction pattern(s) to steer received communication signals.
    Type: Grant
    Filed: January 30, 2015
    Date of Patent: November 20, 2018
    Assignee: KYMETA CORPORATION
    Inventors: Ryan A. Stevenson, Jeff Dallas, Adam Bily, Mike Slota, Mark LaCombe, Nathan Kundtz
  • Patent number: 9980089
    Abstract: A mobile device, a corresponding notification method, and a corresponding computer-readable recording medium are provided. The mobile device includes an output unit and a control unit. The control unit is coupled to the output unit. The control unit controls the output unit to output a notification in response to a signal. The signal is related to an altitude of the mobile device. The notification indicates enabling or disabling an airplane mode of the mobile device.
    Type: Grant
    Filed: January 21, 2015
    Date of Patent: May 22, 2018
    Assignee: HTC Corporation
    Inventor: Yu-Hsin Liang
  • Patent number: 9711845
    Abstract: An aerial vehicle includes at least one antenna configured to at least one of transmit and receive a signal and a radome assembly at least partially covering the antenna. The radome assembly includes a shell having an inner surface that defines an opening therein and a tip comprising an extension portion coupled to the shell. The radome assembly also includes a component that engages a portion of the extension portion such that the extension portion is impeded from exiting the opening.
    Type: Grant
    Filed: July 21, 2014
    Date of Patent: July 18, 2017
    Assignee: The Boeing Company
    Inventors: Thomas Richardson Pinney, John C. Waldrop, III, John Scott Kruse
  • Patent number: 9362626
    Abstract: Equipment for the reduction of the radar marking of an aircraft V, can be applied to at least one hot portion H of the aircraft, chosen from the following: a piloting cabin or cockpit, including at least one transparent portion; a first frame of the fuselage; a plurality of junction edges of components, including wings, tail veilings and engine air intakes; at least one motor face. Said equipment comprises at least one device for dissipating incident radar waves, which can be removably applied to at least one hot portion H of the aircraft without affecting the aerodynamic characteristics of the aircraft V.
    Type: Grant
    Filed: February 13, 2012
    Date of Patent: June 7, 2016
    Assignee: ALENIA AERMACCHI SPA
    Inventors: Emanuele Merlo, Fabio Brenna
  • Patent number: 9343815
    Abstract: A metal plate of small, reflective cells of varying, random (within a limited rage) heights that reflect radio frequency energy such that individual reflective paths are of random length, adding neither constructively nor destructively, and thus not creating a standing wave condition between the reflective plate and the emitter or receiver is disclosed.
    Type: Grant
    Filed: June 27, 2014
    Date of Patent: May 17, 2016
    Assignee: Associated Universities, Inc.
    Inventor: Galen Kent Watts
  • Patent number: 9312604
    Abstract: The invention provides a boundary radiation prevention structure, comprising: a metal portion, and a guide portion. The metal portion has an incident plane adapted to block an incident electromagnetic wave, wherein the incident electromagnetic wave induces an induced current on the incident plane. The guide portion is located on one border of the incident plane and has a curved surface electrically connected to the metal portion for the induced current to pass through, wherein the curved surface is covered by an absorption layer for absorbing the incident electromagnetic wave and a boundary radiation generated from the induced current radiation.
    Type: Grant
    Filed: April 9, 2013
    Date of Patent: April 12, 2016
    Assignee: CLARIDY SOLUTIONS, INC.
    Inventors: Horng Ji Chen, Yu Ting Hsiao, Che Fu Lin, Lin Chi Choo
  • Patent number: 9164166
    Abstract: A device includes a radar signal detector configured to detect a police radar signal and determine a frequency of the police radar signal and a display in communication with the radar signal detector and configured to provide a first display portion associated with a first range of frequencies. In particular, the display is further configured to provide a visual indicator associated with the police radar signal, the visual indicator having a first position within the first display portion which varies based on the frequency of the police radar signal and the visual indicator having a first visual appearance when the frequency is within a predetermined subset of the first range of frequencies and a second visual appearance when the frequency is outside the predetermined subset of the first range of frequencies.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: October 20, 2015
    Assignee: Valentine Research, Inc.
    Inventors: Michael D. Valentine, Gary E. Carrelli, Richard L. Dickerson, Michael Negussu, Stephen R. Scholl
  • Patent number: 8890101
    Abstract: An electromagnetic wave absorbing device includes a ground layer formed of a metal conductor layer, a dielectric layer formed on the ground layer, and a unit cell pattern layer which is formed on the dielectric layer and made of resistive materials, wherein at least two electromagnetic bandgap-based unit cell patterns are periodically arranged on the unit cell pattern layer.
    Type: Grant
    Filed: December 5, 2011
    Date of Patent: November 18, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventor: Dong-Uk Sim
  • Publication number: 20140292553
    Abstract: Electromagnetic attenuation of an object is accomplished by attaching a boot to a surface of an operational part of the object. The boot includes a thermoplastic material, such as in a thermoplastic layer, and an electromagnetic attenuation material, such as in an electromagnetic attenuation layer that overlies at least part of the thermoplastic layer. The attaching is accomplished by placing the boot onto the operational part, and then heat shrinking the boot to attach the boot to the operational part. The electromagnetic attenuation layer may have gaps in it prior to the heat shrinking, gaps that are closed during the heat shrinking, to the greater contraction of the thermoplastic layer. The boot and method may be used to advantageously provide electromagnetic attenuation without a need for spraying processes. The method may be used to retrofit and/or repair an object, without needed to remove it from the field.
    Type: Application
    Filed: April 2, 2013
    Publication date: October 2, 2014
    Applicant: Raytheon Company
    Inventor: Raytheon Company
  • Publication number: 20140077987
    Abstract: Equipment for the reduction of the radar marking of an aircraft V can be applied to at least one hot portion H of the aircraft, chosen from the following: a piloting cabin or cockpit, including at least one transparent portion; a first frame of the fuselage; a plurality of junction edges of components, including wings, tail veilings and engine air intakes; at least one motor face. The equipment includes at least one device for dissipating incident radar waves, which can be removably applied to at least one hot portion H of the aircraft without affecting the aerodynamic characteristics of the aircraft V.
    Type: Application
    Filed: February 13, 2012
    Publication date: March 20, 2014
    Applicant: ALENIA AERMACCHI SPA
    Inventors: Emanuele Merlo, Fabio Brenna
  • Patent number: 8646373
    Abstract: A system for reducing the effects of a blast wave includes armor plating configured to face a supersonic blast wave. The armor plating has a surface consisting of alternating tall and short peaks with valleys between the peaks. The peaks and valleys are positioned such that the supersonic blast wave reflects from the side surfaces of the tall peaks as a regular reflection that at least partially suppresses Mach reflection of the supersonic wave caused by the short peaks and the valleys. The surface may also be designed to not trap reflected waves. The valleys can be parabolic shaped to deflect and/or dissipate transonic flow that follows the blast wave front.
    Type: Grant
    Filed: May 4, 2009
    Date of Patent: February 11, 2014
    Assignee: Nova Research, Inc.
    Inventors: Yan R. Kucherov, Graham K. Hubler
  • Patent number: 8564472
    Abstract: In one embodiment of the present invention, a conductive pattern portion formed in a pattern layer functions as an antenna, and, when electromagnetic waves at a predetermined frequency arrive, resonance occurs, and an electromagnetic wave of a specific frequency is introduced into a sheet member. As to the sheet member having the pattern layer, even in a small and thin sheet member, the phase of reflected waves from the reflection area can be adjusted, and thus an area having high electric field intensity due to interference between reflected waves from the reflection area and arriving electromagnetic waves can be set in the vicinity of the antenna element. When the sheet member is disposed between an antenna element and a communication jamming member, an electromagnetic field is generated around the conductive pattern portion, and an electromagnetic energy is supplied from the conductive pattern portion to the antenna element, and therefore receiving power of the antenna element can be increased.
    Type: Grant
    Filed: October 23, 2006
    Date of Patent: October 22, 2013
    Assignee: Nitta Corporation
    Inventors: Haruhide Okamura, Takahiko Yoshida, Masato Matsushita, Yoshiharu Kiyohara, Shinichi Sato, Ryota Yoshihara, Kazuhisa Morita, Hiroaki Kogure
  • Patent number: 8251288
    Abstract: A network-centric targeting system includes a prepare module to plan for targeting engagements and to identify a target; a sense module to locate targets of opportunity and targets generated by the prepare module to form targeting information; a refine module to enhance the targeting information from the sense module; a track module to maintain a location of a target, a state of the target and target activity, the track module being coupled to the refine module; a target module to select effects and to coordinate delivery of selected effects to the target, the target module being coupled to the track module, the refine module and the sense module; a deliver module to deliver effects to the target, the deliver module being coupled to the track module, the refine module, the target module and the sense module; and an assess module to assess effectiveness of the delivered effects on the target.
    Type: Grant
    Filed: October 14, 2008
    Date of Patent: August 28, 2012
    Assignee: Raytheon Company
    Inventors: Michael J. Woitalla, Sean M. Beary
  • Patent number: 8031104
    Abstract: A microwave absorber, especially for high temperature applications, has at least one resistive sheet and at least one dielectric layer. The resistive sheet has a material of construction that is a MAX phase material.
    Type: Grant
    Filed: October 18, 2007
    Date of Patent: October 4, 2011
    Assignee: Totalförsvarets Forskningsinstitut
    Inventor: Anna Jänis
  • Patent number: 8017217
    Abstract: A material of variable emissivity includes a first metallic layer having a first aperture, a second metallic layer having a second aperture, and a variable dielectric layer interposed between the first metallic layer and the second metallic layer.
    Type: Grant
    Filed: May 9, 2008
    Date of Patent: September 13, 2011
    Assignee: HRL Laboratories, LLC
    Inventors: Daniel J. Gregoire, Deborah J. Kirby
  • Patent number: 7970345
    Abstract: Methods of transmitting an information signal in a satellite communications system include splitting the information signal into a first signal component and a second signal component, transmitting the first signal component to a first system element of the satellite communications system, transmitting the second signal component to a second system element of the satellite communications system, combining the first signal component and the second signal component to form a combined signal, and recovering the information signal from the combined signal. Related systems and components are also disclosed.
    Type: Grant
    Filed: June 21, 2006
    Date of Patent: June 28, 2011
    Assignee: ATC Technologies, LLC
    Inventors: J. Terence Cummiskey, Peter D. Karabinis
  • Patent number: 7899644
    Abstract: A threat launch detection system includes at least one temporal threat detector, each temporal threat detector including a single sensing element operable to sense radiation from various types of short-burn threats that occur within a field of view of the detector. The single sensing element generates a detection signal in response to the sensed radiation. A processing circuit is coupled to each temporal threat detector and is operable to analyze the detection signal from each detector as a function of time to detect the occurrence of a short-burn threat within the field of view of any of the temporal threat detectors. Each temporal threat detector may be a prism-coupled compound parabolic concentrator (PCCP).
    Type: Grant
    Filed: February 7, 2005
    Date of Patent: March 1, 2011
    Assignee: BAE Systems Information and Electronic Systems Integration Inc.
    Inventors: Jonathan L. Weber, John Mandzy, Paul I. Egbert, Kirby A. Smith, Jill A. Shea, John L. Downing, III
  • Patent number: 7834799
    Abstract: Various embodiments provide systems and methods for fabricating composite laminate structures with co-laminated radar absorbing material. An example embodiment includes providing a component part fabricated from composite laminate and having an inside surface and an outside surface; providing a portion of radar absorbing material (RAM) having an inside surface and an outside surface; positioning the outside surface of the component part against the inside surface of the portion of RAM to form an assembly; and applying pressure to the assembly thereby causing the portion of RAM to bond to the outside surface of the component part.
    Type: Grant
    Filed: May 23, 2008
    Date of Patent: November 16, 2010
    Assignee: Composite Engineering, Inc.
    Inventor: Cliff Wells
  • Publication number: 20100271253
    Abstract: A radar absorbing composite includes a (CNT)-infused fiber material disposed in at least a portion of a matrix material. The composite absorbs radar in a frequency range from about 0.10 Megahertz to about 60 Gigahertz. The CNT-infused fiber material forms a first layer that reduces radar reflectance and a second layer that dissipates the energy of the radar. A method of manufacturing this composite includes disposing a CNT-infused fiber material in a portion of a matrix material with a controlled orientation of the CNT-infused fiber material within the matrix material, and curing the matrix material. The composite can be formed into a panel which is adaptable as a structural component of a transport vessel or missile for use in stealth applications.
    Type: Application
    Filed: April 23, 2010
    Publication date: October 28, 2010
    Applicant: Lockheed Martin Corporation
    Inventors: Tushar K. SHAH, Harry C. MALECKI
  • Patent number: 7746264
    Abstract: An infrared camouflage coating system for application to the strategic surfaces of jet engine components comprised of a metal alloy substrate having an oxidized surface and a ferrous sulfide containing silicate glass bonded thereto.
    Type: Grant
    Filed: July 11, 1978
    Date of Patent: June 29, 2010
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Hyman Kirtchik
  • Patent number: 7733263
    Abstract: A camouflage coating system for application to the surfaces of jet engine components in order to reduce their level of emitted energy there by rendering them undetectable by infrared detection systems. The camouflage coating comprises a multilayer system having a first diffusion barrier of nickel aluminide applied to the substrate surface. A second silver reflective layer superimposed on the diffusion barrier layer and a glass-ceramic protective overlay superimposed on the silver reflective layer.
    Type: Grant
    Filed: July 11, 1978
    Date of Patent: June 8, 2010
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Hyman Kirtchik
  • Patent number: 7633424
    Abstract: According to one exemplary embodiment, a wide temperature range dielectric absorber includes a dielectric absorber comprising a blend of lanthanum oxide, strontium oxide, and cobalt oxide, and is represented by (1?z)[La1?xSrxCoO3±y]+z[La2?xSrxCoO4±y]. The dielectric absorber includes a first crystalline structure existing independently from a second crystalline structure causing the dielectric absorption composition to have a wide temperature range of electromagnetic radiation absorption. In one embodiment, the first crystalline structure is a perovskite crystalline structure and the second crystalline structure is a potassium nickel fluoride crystalline structure.
    Type: Grant
    Filed: March 30, 2007
    Date of Patent: December 15, 2009
    Assignee: Skyworks Solutions, Inc.
    Inventor: Michael D. Hill
  • Patent number: 7450051
    Abstract: A radar detector is operated to suppress nuisance radar alerts by identifying a first signal in radar band of interest, e.g., having a frequency that is a harmonic of a first nuisance local oscillator frequency leaked from a nearby radar detector and identifying a second signal having a frequency that is a harmonic of a second nuisance local oscillator frequency leaked from the radar detector where the first and second local oscillators are companion signals. A detector is also provided that suppresses nuisance radar alerts by detecting a first signal in a radar band, providing a first alert designating the detection of the first signal, determining that the first signal is a nuisance signal, providing a second alert designating that the first signal is a false alarm, and turning off the second alert after a predetermined period.
    Type: Grant
    Filed: November 18, 2005
    Date of Patent: November 11, 2008
    Assignee: Valentine Research, Inc.
    Inventors: Michael D. Valentine, Gary E. Carrelli
  • Patent number: 7432855
    Abstract: In one embodiment, an RFID reader and active tag (RAT) includes: a first beam forming means for interrogating a plurality of RFID tags using at least a first set of two antennas coupled to a first fixed phase feed network, the beam forming means being configured to adjust gains in the first fixed phase feed network to scan with respect to the plurality of RFID tags; and a second beam forming means for uploading RFID data from the interrogated plurality of RFID tags to an external access point using at least a second set of two antennas coupled to a second fixed phase feed network, the beam forming means being configured to adjust gains in the second fixed phase feed network to direct its RF beam at the external access point.
    Type: Grant
    Filed: June 14, 2005
    Date of Patent: October 7, 2008
    Inventor: Farrokh Mohamadi
  • Patent number: 7403152
    Abstract: An antenna structure including an antenna 10 with an outer main surface 11, where said antenna 10 is integrated in a surface of a surrounding material 20. Further comprising a transition zone 30 arranged along the perimeter of the main surface 11 and overlapping the main surface, where the transition zone 30 comprises a layer of a resistive material with a resistivity that varies with the distance from an outer perimeter of the transition zone 30 to enable a smooth transition of the scattering properties between the antenna 10 and the surrounding material 20.
    Type: Grant
    Filed: February 24, 2006
    Date of Patent: July 22, 2008
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventor: Mats Gustafsson
  • Patent number: 7375688
    Abstract: A choke ring apparatus for attenuation of electromagnetic waves in a mobile platform fuselage includes a ground plane mounted on a surface of the fuselage. The choke ring has an axial circular window and a series of concentric circular ring segments on the ground plane arranged coaxially about the axis of the window. The circular ring segments extend from the ground plane. The ring segments defining at least one groove therebetween. The ring segments have a flat ridge at the edge, and each groove has a depth defined by a pair of adjacent ring segments. The width of the flat ridge surfaces and a width of the groove between adjacent ring segments are approximately equal. The depth of the groove is determined based on a predetermined resonant frequency, such that the choke ring apparatus selectively attenuates electromagnetic waves in a region of the resonant frequency when propagating through the window.
    Type: Grant
    Filed: December 8, 2006
    Date of Patent: May 20, 2008
    Assignee: The Boeing Company
    Inventors: Craig Francque, Phillip A. Lindsey
  • Patent number: 7310059
    Abstract: The panes (1) of a naval vessel or military vehicle are often coated with a radar-reflecting layer (20) for reduction of the radar signature of the vessel/vehicle. At the same time this layer increases an enemy's possibility of recognizing the vessel in passive IR reconnaissance since the layer increases the reflectance also for IR radiation to a considerable extent. As a result, the intensity of IR radiation that an enemy receives from the panes is much lower than that from the rest of the vessel, which with signal processing can be used to increase the possibility of recognizing the vessel. According to the invention, it is suggested that the panes (1) on the outer face (8) also have a second layer (21, 22) to increase emittance especially within the IR range 2-20 ?m which is normally used for reconnaissance and the like. This second layer (21, 22) comprises especially two coatings, one of which is active in the IR range 3-5 ?m and the second in the IR range 7-14 ?m.
    Type: Grant
    Filed: August 15, 2003
    Date of Patent: December 18, 2007
    Assignee: Totalforsvarets Forskningsinstitut
    Inventors: Mikael Georgson, Örjan Staaf
  • Patent number: 7224274
    Abstract: An information retrieval system for retrieving information relating to a locality includes a data collecting module for collecting data relating to a location of the device and the locality in which the device is located. A processor, which is in communication with the data collecting module, processes the collected data to provide formatted data suitable for printing. A printing unit is associated with the device for printing the formatted data to provide information relating to the locality.
    Type: Grant
    Filed: February 12, 2003
    Date of Patent: May 29, 2007
    Assignee: Silverbrook Research Pty Ltd
    Inventor: Kia Silverbrook
  • Patent number: 7215275
    Abstract: An apparatus for adaptive camouflage with independent control of both temperature and apparent color. The apparatus has cells or individual pixels behind a transparent outer layer. The temperature of the outer layer is controlled by a heat transfer fluid flowing in a closed circuit in each cell, the fluid being cooled or heated by Pelletier elements located behind the assembly. Color changes can be activated separately at the back of the transparent layer by the rotation of metallic triangles whose sides are covered with various color paints, the triangles being located behind the transparent layer. Radar absorption is obtained by the transparent layer and heat transfer fluid and by the selective orientation of the metallic triangles in various directions. The apparent signature of the assembly can then be varied by adapting the signature of the various cells to current environmental conditions when background conditions alter.
    Type: Grant
    Filed: December 1, 2004
    Date of Patent: May 8, 2007
    Assignee: Her Majesty the Queen as represented by the Minister of National Defence of Her Majesty's Canadian Government
    Inventor: Jean Dumas
  • Patent number: 7035308
    Abstract: Described herein is a method and system for providing a countermeasure against laser detection systems using nanocomponent material that is tailored to cloak or obscure a target from detection by transmitted laser radiation. The nanodot material absorbs and/or down-converts the transmitted laser radiation. Similarly, described herein is a method and system for providing a countermeasure against laser systems intended to blind a target through the use of a specifically engineered nanocomponent material for absorbing and/or down-converting the radiation from the laser system.
    Type: Grant
    Filed: April 11, 2003
    Date of Patent: April 25, 2006
    Assignee: Science Applications International Corporation
    Inventors: Scott Earl McNeil, Martin Joseph Fritts, Roy Reed Heddleston, Martin B. Mark
  • Patent number: 6992314
    Abstract: Disclosed is a device for eliminating electromagnetic waves which consists essentially of an electromagnetic-wave trapping means comprising mainly a coil, and a discharge means made on the opposite end to the basement of the trapping means, wherein the coil having a diameter which gradually decreases from the basement to the opposite end of the trapping means.
    Type: Grant
    Filed: September 4, 2003
    Date of Patent: January 31, 2006
    Assignee: Kabushiki Kaisha Shunkosha
    Inventors: Kazuya Masaki, Ken Hayashibara
  • Patent number: 6888489
    Abstract: There is provided a radar system for protecting a radar compartment from a transmitted radar beam. The radar system comprises an antenna having a transmitter surface for transmitting the radar beam. There is further provided a protective member having an outer protective surface. This protective member is externally located adjacent the antenna for protecting the radar compartment from the transmitted radar beam. In addition, an alignment member is disposed between the antenna and the protective member. The alignment member is sized and configured to align the transmitter surface towards the outer protective surface for guiding the transmission of the radar beam therethrough. By featuring these components in such an arrangement, an operating frequency of any portion of the transmitted radar beam which diffracts from the outer protective surface can be mitigated to protect the radar compartment therefrom.
    Type: Grant
    Filed: June 23, 2003
    Date of Patent: May 3, 2005
    Assignee: Northrop Grumman Corporation
    Inventor: Robert Cordell Agler
  • Publication number: 20040257261
    Abstract: There is provided a radar system for protecting a radar compartment from a transmitted radar beam. The radar system comprises an antenna having a transmitter surface for transmitting the radar beam. There is further provided a protective member having an outer protective surface. This protective member is externally located adjacent the antenna for protecting the radar compartment from the transmitted radar beam. In addition, an alignment member is disposed between the antenna and the protective member. The alignment member is sized and configured to align the transmitter surface towards the outer protective surface for guiding the transmission of the radar beam therethrough. By featuring these components in such an arrangement, an operating frequency of any portion of the transmitted radar beam which diffracts from the outer protective surface can be mitigated to protect the radar compartment therefrom.
    Type: Application
    Filed: June 23, 2003
    Publication date: December 23, 2004
    Inventor: Robert Cordell Agler
  • Patent number: 6797401
    Abstract: Electromagnetic wave absorbing materials comprising magnetic alloy particles and an insulating matrix are disclosed. The magnetic alloy particles comprise a transition metal such as Fe and/or Co, and further comprise at least one refractory metal such as Ti, V, Cr, Zr, Nb, Mo, Hf, Ta and W. The magnet alloy particles may further include Ni and/or Al, or other alloying additions which provide the desired absorption characteristics. In a preferred embodiment, the magnetic alloy particles comprise an Fe—Cr—Ni—Al alloy. The insulating matrix of the electromagnetic wave absorbing material may comprise a water miscible polysilicate or a refractory cement. The materials may be provided in the form of coatings that are applied to a substrate, such as the hot engine exhaust area of an aircraft. The electromagnetic wave absorbing materials are capable of functioning at very high temperatures for extended periods of time while retaining satisfactory electromagnetic wave absorbing properties.
    Type: Grant
    Filed: June 20, 2002
    Date of Patent: September 28, 2004
    Assignee: Lockheed-Martin Corporation
    Inventor: Dale P. Herron
  • Publication number: 20040169599
    Abstract: The invention relates to a device for exhausting hot gases with a reduced signature, for instance exhaust gases from an exhaust (7, 8) of a tank. The device is of the type comprising a means for mixing (9, 33) of the hot gases with fresh air from the exterior of the tank. To prevent the exhaust from, for instance, reflecting radar radiation and emit IR radiation, the device is provided with a protecting means (10, 34) which is positioned outside at least parts of said means. The device may comprise a space (12, 32) which accommodates preferably the entire means for mixing. The space is defined on the one hand by a shell (11, 31) towards the other spaces of the tank and, on the other hand, by the protecting means towards the exterior. The protecting means has openings (23, 25) for passing preferably a gas mixture from the means to the exterior and fresh air from the exterior to said means.
    Type: Application
    Filed: April 22, 2004
    Publication date: September 2, 2004
    Inventor: Urban Mathiasson
  • Patent number: 6784419
    Abstract: The present invention provides a flame-retardant electromagnetic wave absorber that exhibits excellent formability and electromagnetic wave-absorbing properties, and can be easily assembled and constructed. The electromagnetic wave absorber comprises a wave-absorbing body and a base plate supporting the bottom thereof, wherein the wave-absorbing body is formed in a pyramid shape by fitting polygonal wave-absorbing plates into each other.
    Type: Grant
    Filed: October 26, 2000
    Date of Patent: August 31, 2004
    Assignee: Kabushiki Kaisha Riken
    Inventors: Toshikatsu Hayashi, Yasushi Sakai
  • Publication number: 20040021597
    Abstract: A method of minimizing reflectivity of an electromagnetic absorbing structure within a prescribed frequency range, including at least one skin layer having a thickness, at least one spacer layer having a thickness, and at least one resistivity sheet having a resistivity. Then, the thicknesses of the at least one skin layer, the at least one spacer layer, and the at least one resistivity sheet are determined.
    Type: Application
    Filed: May 7, 2003
    Publication date: February 5, 2004
    Inventors: George J. Dvorak, Karel Matous
  • Patent number: 6686866
    Abstract: The two-piece end cap assembly has an end cap that has a groove around its perimeter and at least one cavity. The end cap is fixed in place inside the flare case with the cavities exposed. Sealant/adhesive is applied to the groove and cavity. A RAM cap, having a flange on its edge corresponding to the size of the flare case and a number of projections corresponding to the cavities, is installed on the top surface of the end cap. The sealant/adhesive in the cavities attaches the RAM cap to the end cap. The sealant/adhesive in the groove is forced to the edges of the end cap and provides a seal between the end cap and the flare case. Radar Absorbing Material is applied to the top and exposed edges of the RAM cap, completely masking the face of the flare and its edges.
    Type: Grant
    Filed: September 26, 2002
    Date of Patent: February 3, 2004
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Dennis D. Deckard, David J. Mulinix
  • Patent number: 6583749
    Abstract: According to the invention, there is provided a device enveloping said superstructure and able to reflect electromagnetic waves, said device comprising a truncated pyramidal frame (6) and a net (7) covering the small base of said frame (6).
    Type: Grant
    Filed: March 27, 2002
    Date of Patent: June 24, 2003
    Assignee: MBDAM
    Inventor: Bernard Aknin
  • Patent number: 6518911
    Abstract: A non-skid, radar absorbing system 10. The system absorbs and scatters incident microwave and/or millimeter wave radiation so as to decrease retro reflectance. The system includes an absorbing layer (RAM) 14 juxtaposed with a substrate 12. Disposed adjacent the RAM 14 is a non-skid matrix layer 16 for providing a safe foot hold. Optionally, a protective environmental topcoat 18 is applied to the non-skid layer 16. The system has electrical and magnetic characteristics such that radar energy at a discrete or broadband frequencies is at least partially absorbed. The invention also includes methods of making and using the non-skid, radar absorbing system 10.
    Type: Grant
    Filed: May 16, 2001
    Date of Patent: February 11, 2003
    Assignee: General Dynamics Land Systems, Inc.
    Inventors: S. Jared Strait, Martin A. Lindell, Richard Norman Johnson
  • Publication number: 20030011504
    Abstract: According to the invention, there is provided a device enveloping said superstructure and able to reflect electromagnetic waves, said device comprising a truncated pyramidal frame (6) and a net (7) covering the small base of said frame (6).
    Type: Application
    Filed: March 27, 2002
    Publication date: January 16, 2003
    Inventor: Bernard Aknin
  • Publication number: 20020190889
    Abstract: The present invention relates to a material of construction which includes a radar-dispersing metal foam, and to a vehicle to which a radar-dispersing metal foam has been applied. The radar-dispersing metal foam is capable of reducing the radar return from an object by a significant amount over a wide range of radar frequencies. The metal foam has a very low reflectivity to incident radar wave radiation.
    Type: Application
    Filed: November 30, 2001
    Publication date: December 19, 2002
    Inventors: George W. Webb, Susan G. Angello
  • Publication number: 20020171578
    Abstract: A non-skid, radar absorbing system 10. The system absorbs and scatters incident microwave and/or millimeter wave radiation so as to decrease retro reflectance. The system includes an absorbing layer (RAM) 14 juxtaposed with a substrate 12. Disposed adjacent the RAM 14 is a non-skid matrix layer 16 for providing a safe foot hold. Optionally, a protective environmental topcoat 18 is applied to the non-skid layer 16. The system has electrical and magnetic characteristics such that radar energy at a discrete or broadband frequencies is at least partially absorbed. The invention also includes methods of making and using the non-skid, radar absorbing system 10.
    Type: Application
    Filed: May 16, 2001
    Publication date: November 21, 2002
    Applicant: General Dynamics Land Systems, Inc.
    Inventors: S. Jared Strait, Martin A. Lindell, Richard Norman Johnson
  • Patent number: 6456224
    Abstract: An edge concealment system for abating electrical discontinuities between externally exposed edges of adjacent surface pieces separated by a gap. The system includes a cover component shrouding each edge and able to absorb or conduct incident radar energy. A male element and a female element extend between the cover component and the surface piece for positive engagement of the male element within the female element and retention of the cover component with the surface piece. Preferably the engagement of the male and female elements includes an audible signal such as a click sound when the engagement occurs so that operators are confirmatively advised upon positive placement.
    Type: Grant
    Filed: July 5, 2001
    Date of Patent: September 24, 2002
    Assignee: Northrop GrummanCorporation
    Inventors: Hal Michael Cobb, Wayne William Schmidt, Peter A. Peraldo, Daniel E. Suh, Anthony Cazzato
  • Patent number: 6417795
    Abstract: Variational calculus principles are applied directly to the radiation integral to minimize the radar signature of a two- or three-dimensional geometry. In the preferred embodiment, the radiation integral is minimized through the solution to a differential equation generated by Euler's calculus of variations (CoV) equation. When used in conjunction with a minimizing sequence, the analysis affords a broad search of all possible coefficient values to ultimately arrive at global minima. Compared to existing techniques, the approach locates local extrema quickly and accurately using fewer impedance matrix calculations, and optimization using the invention is possible over a wide band of frequencies and angles. The method is applicable to a wide variety of situations, including the design of stealth platforms.
    Type: Grant
    Filed: September 7, 2000
    Date of Patent: July 9, 2002
    Assignee: Veridian ERIM International, Inc.
    Inventor: Brian E. Fischer
  • Patent number: 6411248
    Abstract: A glue-gun applied hot-melt radar-absorbing material (RAM) and method of use thereof is provided. The hot-melt radar-absorbing material composition comprises: (a) 70 to 85 wt % carbonyl iron powder; (b) 2 to 10 wt % of a metal deactivator; and (c) balance a thermoplastic polyurethane. The method for repair of a body comprising a radar-absorbing material, comprises: (a) formulating the hot-melt radar-absorbing material of the present invention; (b) forming the hot-melt radar-absorbing material into a shape; (c) applying the hot-melt radar-absorbing material in a molten state onto the body; and (d) allowing the hot-melt radar-absorbing material to cool to room temperature. The shape of the hot-melt RAM is advantageously a “glue stick”, which is configured to go into a glue gun. The repair operator loads the glue stick into the glue gun and pulls the trigger. The glue gun heats the glue stick, and the molten material is applied to the area to be repaired.
    Type: Grant
    Filed: September 27, 2000
    Date of Patent: June 25, 2002
    Assignee: Raytheon Company
    Inventors: April A. Barbour, Deirdre S. Crutchfield
  • Patent number: 6380906
    Abstract: A ruggedized ultra high radio frequency antenna disposable at the rear of a hardened target penetrator warhead is provided. The antenna is usable for communicating signals from a transmitter in a deployed target penetrator warhead to a local repeater where retransmission to a more remote location can occur. The antenna includes a length-shortening and penetration abuse-resistant dielectric embedding material also supporting the subterranean signal communication to the local repeater function. Antenna radiating element fabrication from porous material such as screen wire and use of the dielectric material in a manner providing large G force tolerance and external dielectric variations are included.
    Type: Grant
    Filed: April 12, 2001
    Date of Patent: April 30, 2002
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: John L. Cesulka
  • Patent number: 6318667
    Abstract: A winged bomb is launched from a launch aircraft and glides to a target. During the glide the winged bomb follows a calculated guide path stored in a on board computer, with correction generated by the computer using data from an altimeter and global positioning receiver. Near the termination of the glide a television camera is activated and transmits signals to a remote location from which final correction are manually generated and transmitted by radio to the bomb. The bomb is designed with low radar cross section.
    Type: Grant
    Filed: March 29, 2000
    Date of Patent: November 20, 2001
    Inventor: Raymond C. Morton