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| Number | Title | Issue Date |
| 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 impedance between that of the surface and free space. The resisti... | 02/24/1998 |
| 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 specially-shaped jacket and into at least part of the tail... | 02/10/1998 |
| 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 state at temperatures above a predetermined temperature and th... | 07/08/1997 |
| 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 as a new absorbing material for radar microwave signals. ... | 11/12/1996 |
| 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 capable of absorbing certain frequencies; and an additional set of ... | 06/04/1996 |
| 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 is described. The composition comprises a chromophore cap... | 03/26/1996 |
| 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 in a wide band, namely the 3 to 12 micron range. A claddin... | 03/26/1996 |
| 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 figure which causes the reflected electromagnetic emission to ... | 01/30/1996 |
| 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 drawn from the rollers by wind-up spools to form a pyramida... | 07/25/1995 |
| 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 that this DC potential would be applied to the outer skin ... | 05/30/1995 |
| 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 mixture of a prepolymer composition of a flexible polyurethane... | 11/15/1994 |
| 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 with a radiation reflecting material, such as gold or aluminu... | 09/06/1994 |
| 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 conductive layer. The combination may be applied directly ... | 01/04/1994 |
| 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 suppress radar echoes such as, for example, an aircraft, a ship ... | 01/04/1994 |
| 5250950 | 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 the receiver. In particular, radar signals which strike the ... | 10/05/1993 |
| 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 signals strike the antenna elements (A & B) after grazing the... | 12/22/1992 |
| 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 energy reflection toward its source or another receiver lo... | 07/07/1992 |
| 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 first stack constituted by a layer (2) of first dielectric... | 05/05/1992 |
| 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, the heat of combustion causes the plastisol to soften, react... | 01/21/1992 |
| 5063384 | 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 energy reflection toward its source or another receiver lo... | 11/05/1991 |
| 5016015 | 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 energy reflection toward its source or another receiver lo... | 05/14/1991 |
| 5014060 | 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 energy reflection toward its source or another receiver lo... | 05/07/1991 |
| 5003311 | Fiber composite with layers matched to peak radar wave attenuation The fiber composite for bearing structures for absorption of electromagnetic waves consists in its structure of at least three layers (2, 3, 4, 5, 6, 7, 8, 9) to be different in their electromagnetic material constants, whereby one or more fiber layers (1... | 03/26/1991 |
| 4989006 | Microwave absorption system Microwave absorption in a varying magnetic field is investigated near electron cyclotron resonance with a network analyzer which is capable of swept frequency measurements, and of measuring reflection and transmission coefficients from 0.045 to 18 GHz, wi... | 01/29/1991 |
| 4960633 | Microwave-absorptive composite A microwave absorptive composite suitable for use in ships, aircrafts and the like comprises an outermost layer of a thermosetting resin-impregnated, fibrous sheet; an intermediate layer of a normally liquid, carbonblack-containing silicone rubber sheet; ... | 10/02/1990 |
| 4924228 | 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 energy reflection toward its source or another receiver lo... | 05/08/1990 |
| 4728554 | Fiber structure and method for obtaining tuned response to high frequency electromagnetic radiation The present invention relates to fiber structures and methods for obtaining tuned response to high frequency electromagnetic radiation, particularly at microwave frequencies. In one embodiment, a woven fabric is prepared with ferrite filled fibers oriente... | 03/01/1988 |
| 4725490 | High magnetic permeability composites containing fibers with ferrite fill High magnetic permeability composites are obtained by incorporating ferrite fibers in the composites. The ferrite fibers consist of a polymer and particulate ferrite fill at a concentration above the percolation threshold for the ferrite fill in the polym... | 02/16/1988 |
| 4716417 | Aircraft skin antenna A holographic aircraft antenna and method of fabricating the antenna are disclosed herein. The antenna includes a thin layer of dielectric strips of material contoured to and mounted on the conductive skin of the aircraft or a plurality of thin metal cond... | 12/29/1987 |
| 4700190 | Missile decoy radar cross section enhancer A decoy missile having the shape of a reentry vehicle and containing a pair of conically shaped dipole jacks in tandem, the jacks are shaped and spaced to provide a desired reflective cross section at a specific frequency, the rear cover plate of the deco... | 10/13/1987 |
| 4581284 | Fiber compound material A fiber compound material of individual layers of superposed fiber plies such as glass fiber prepregs which are joined together by a matrix of a resin and a hardener and act as a load carrying structure to absorb electromagnetic waves. Radar beam-absorbin... | 04/08/1986 |
| 4148032 | Method and means for defocusing engine cavity reflected energy Radar wave energy entering aircraft engine cavities is substantially disped by providing within such cavities surfaces having perturbations or dipoles which interact with the electromagnetic energy within the cavity interior, causing the reflected energy... | 04/03/1979 |
| 4084161 | Heat resistant radar absorber A foamed ceramic slab is bonded to a three-layer polyimide RAM substrate to roduce a radar absorber capable of at least 10db absorptivity of the range 3 to at least 10 GHZ and of withstanding very high temperatures, for example, 3,000° F for 80 seconds or... | 04/11/1978 |
| 4044358 | Self erectable structure An interference type radar attenuator is described formed of a plurality of thin sheets having selected admittance values. The sheets are spaced apart by thin plastic spacer members having a shape memory so that the sheets can be compressed together by de... | 08/23/1977 |
| 4019699 | Aircraft of low observability An aircraft which has a very low observability visually and to radar, thel and acoustic detecting devices. The aircraft is designed to have as few edges and surfaces as possible, such as a delta wing type, the edges being straight, or near straight and t... | 04/26/1977 |
| 3997899 | Low radar cross-section re-entry vehicle 1. A low radar cross-section re-entry vehicle comprising: a tubular metallic cannister enclosing all instrumentation and payload for said vehicle, said cannister having a diameter of approximately 10 inches and an overall length of approximately 65 inches... | 12/14/1976 |
