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7450051 |
Systems and methods for discriminating signals in a multi-band detector
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...
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7432855 |
RFID reader and active tag
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...
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7403152 |
Method and arrangement for reducing the radar cross section of integrated antennas
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...
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7375688 |
Electromagnetic compatability with window-choke rings
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...
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7310059 |
Transparent pane with radar-reflecting properties
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...
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7224274 |
Locality information retrieval system
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...
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7215275 |
Independent temperature and apparent color control technology for adaptive camouflage
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...
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7035308 |
Method and system for countering laser technology
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...
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6992314 |
Device for eliminating electromagnetic waves
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...
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6888489 |
RF shielding elimination for linear array SAR radar systems
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...
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6784419 |
Electromagnetic wave absorber
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...
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6686866 |
Two-piece radar-absorbing end cap assembly
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....
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6583749 |
Antidetection by radar device for a flattened superstructure of a ship
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 (...
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6518911 |
Non-skid, radar absorbing system, its method of making, and method of use
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...
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6456224 |
Edge concealment system for abating radar detectability of aircraft
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...
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6417795 |
Method of reducing backscatter through object shaping using the calculus of variations
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...
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6411248 |
Hot melt radar absorbing material (RAM)
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...
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6380906 |
Airborne and subterranean UHF antenna
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...
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6318667 |
Stealth weapon systems
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...
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6300894 |
Antenna having electrically controllable radar cross-section
An RF interface is configured as a laminate structure having a core layer of a ferromagnetic ceramic material, such as barium strontium titanate, whose permitivity is electrically controllable to...
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6184815 |
Transmission line electromagnetic reflection reduction treatment
A transmission line electromagnetic reflection reduction treatment is disclosed herein. This invention relates to radar cross section reduction in vehicles including aircraft, submarines, warships,...
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6134879 |
Suppression system for a gas turbine engine
A suppression system for a gas turbine engine uses a tapered exhaust manifold with a plurality of exhaust nozzles acting in conjunction with a plurality of mixing cells to produce cooling of an...
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6116540 |
Aircraft vertical tail with shadowed base
In accordance with the present invention, there is provided a low observable aerodynamic control system for integrated use with an aircraft fuselage. The control system is provided with a shadow...
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6097327 |
Radio frequency absorber system
An RF absorber system (26) for absorbing RF energy in the payload chamber (20) of a launch vehicle is disclosed. The RF absorber system (26) includes a plurality of panels (27) for providing...
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6057796 |
Electromagnetic wave absorber
An electromagnetic wave absorber which is suitable for cellular phones, portable communication terminals and other portable electronic apparatus. The electromagnetic wave absorber is provided with...
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5976666 |
Electromagnetic radiation absorbing devices and associated methods of manufacture and use
Novel devices for providing shielding from and absorption of broadband electromagnetic radiation, and methods of manufacturing and using these devices, are disclosed. The device is comprised of a...
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5965056 |
Radio wave absorbent
A radio wave absorbent comprises an Ni--Cu--Zn base ferrite having a major composition comprising 49 to less than 50 mol % of Fe 2 O 3 , 32 to 35 mol % of ZnO, 3 to 9 mol % of CuO and 9 to 14 mol...
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RE36298 |
Vehicle
A vehicle in free space or air, with external surfaces primarily fashioned from planar facets. The planar facets or panels are angularly positioned to reduce scattered energy in the direction of...
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5855988 |
Electromagnetic wave absorbing shielding material
An electromagnetic wave absorbing shielding material which is thin and lightweight and shows high electromagnetic wave absorbing capacity in a wide frequency region. The material comprises: (1) a...
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5844518 |
Thermoplastic syntactic foam waffle absorber
The microwave absorption performance of a fiber loaded thermoplastic syntactic material is improved by geometrically reshaping the surface into a waffle shape. Starting with a fiber loaded version...
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5721551 |
Apparatus for attenuating traveling wave reflections from surfaces
An apparatus for attenuating traveling wave reflections from a surface, due to an impedance mismatch between the surface and free space. The apparatus includes a resistive element having an...
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5717397 |
Low observable shape conversion for aircraft weaponry
An apparatus for encapsulating a warhead or bomb for the purpose of reducing the weapon's radar cross-section, including a hollow jacket and a hollow tail section. The warhead is inserted into the...
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5645886 |
Method and system for sealing a radiofrequency signal absorbing coating
A system for sealing an exposed area of a surface coated with a radiofrequency signal absorbing coating includes a heat-responsive compound that transforms from a solid state to viscous melted...
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H001631 |
Method of fabricating radar chaff
The present invention is a method for making radar chaff consisting of metal rings having varying diameters, using photolithographic processes. One aspect of the invention has the steps of:...
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5574961 |
Phase-separated material (U)
A material for disposition on a surface comprising Fe, Co, or FeCo in the form of small single magnetic domain metallic clusters disposed in an insulating matrix of BN. The material may be utilized...
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5523757 |
Signal damping camouflage system and manufacturing method
An electronic attenuation and camouflage device comprising a novel cooling device comprised of microspheres; an additional set of microspheres containing radar attenuating materials <RAM>...
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5502442 |
Method of forming a durable wideband anti-reflection coating for infrared windows
An ultra hard, wideband anti-reflection coating for an IR window, such as GaAs, which resists environmental and chemical attack. The coating is designed to allow spectral transmission therethrough...
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5501724 |
Coating composition for attenuating reflection of electromagnetic radiation
A coating composition for the attenuation of the reflection electromagnetic radiation and particularly electromagnetic radiation have a wavelength of greater than 800 nm including the near infrared...
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5488372 |
Electronic avoidance configurations
A method of construction to make military craft and weapons totally invisible to radar and active infra-red by the configuration of exterior surfaces, each surface having that specific surface...
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5436630 |
Radar shields
A radar shield, in particular for an aircraft radar antenna, comprises a plurality of elongate triangular blinds 6 that may be stowed on individual rollers 7. To deploy the shield, the blinds are...
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5420588 |
Wave attenuation
A radar cross-section reduction system utilizes a charging device for creating a high positive DC static potential on an object such as an aircraft. The charging system is mounted to the object so...
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5364574 |
Method of forming a corrosion-resistant EMI shielding gasket between graphite and metal components
A composition is disclosed for forming an EMI shielding gasket for instalion against a metal object, such as an aluminum frame member of an aircraft, wherein the composition is comprised of a...
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5345238 |
Satellite signature suppression shield
An inflatable shield for suppressing the characteristic radiation signature of a satellite is described. The shield is conical-shaped and made from a thin synthetic polymer film material coated...
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5276447 |
Radar echo reduction device
Radar echo reduction in an aircraft and the like provides a radar reflective rear edge that is independent of the configuration of a main wing or the like. In a particular object required to...
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5275880 |
Microwave absorber for direct surface application
A layered microwave radiation absorber comprises an absorbing layer bound to one side of a conductive layer (such as a metallic plate or foil), and an adhesive layer bound on the other side of the...
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D332080 |
Aircraft
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5173699 |
Antenna arrangement
A missile radome (1) has an acutely pointed profile and includes an antenna array of four elements (A, B) toe'd out around the boresight (5) for an amplitude comparison system. Certain received...
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5128678 |
Aircraft construction
An aircraft structure for the minimization of microwave energy reflection from the aircraft back to a receiver. The provision of structural configurations and materials operate to reduce microwave...
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5110651 |
Dielectric or magnetic anisotropy layers, laminated composite material incorporating said layers and their production process
Dielectric or magnetic anisotropy layers, laminated composite material incorporating said layers and their production process. The laminated material has at least two stacks of assembled layers, a...
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5083128 |
Low observability aperture design for expendable countermeasures devices
A system for installing a plastisol or similar compound into the interior ace of a spent squib-activated countermeasures cartridge. When the squib ignites and expels the countermeasures payload,...
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