Patents
Patents for H01Q 17 - Devices for absorbing waves radiated from an aerial; Combinations of such devices with active aerial elements or systems (2,636)
06/1992
06/23/1992CA1304155C Lens/polarizer/radome
06/09/1992US5121122 Facade construction for high structures
06/09/1992US5120351 Sintering a magnetic mixture containing iron oxide, crushing, granulating, mixing with metallic particles and molding
05/1992
05/26/1992US5117229 Electromagnetic wave absorber
05/20/1992EP0485635A1 Body for absorbing electromagnetic wave
05/14/1992DE4035793A1 Dielectric array aerial for satellites, aircraft etc. - has dielectric radiators for reducing element number to min
05/14/1992DE4035460A1 Large surface, sandwiched sound insulating wall - has extra material layer on side exposed to impingement for narrow band suppression
05/12/1992US5113190 Device for reducing electromagnetic leakage radiation in the vicinity of radiation systems
05/05/1992US5110651 Dielectric or magnetic anisotropy layers, laminated composite material incorporating said layers and their production process
04/1992
04/15/1992EP0466839A4 Electromagnetic wave attenuating and deicing structure
04/08/1992EP0479438A2 Electromagnetic radiation absorbing material employing doubly layered particles
04/07/1992US5103231 Electromagnetic wave absorber
03/1992
03/24/1992US5099244 Support pylon for radar cross-section model testing
03/24/1992US5099242 Novel shielding, reflection and scattering control using chiral materials
03/17/1992US5096551 Metallized tubule-based artificial dielectric
03/10/1992US5095311 Electromagnetic wave absorbing element
03/10/1992US5094907 Laminate, silicon-containing fiber, fiber of silicon, carbon, oxygen and titanium or zircnium from a polymetallocarbosilane
03/04/1992EP0473515A1 Method for making a absorbing shield based on electronic conductive polymer
03/04/1992EP0473510A1 Vapor phase method for making a shield based on conductive polymer and shield obtained by this method
03/03/1992USH1034 Millimeter wave tracking radar antenna with variable azimuth pattern
02/1992
02/27/1992DE4026726A1 Transparent cover with enhanced absorption for specific wavelength - comprising substrate pref. of polymer, pref. indium-tin oxide semiconductor layers and spacer layer
02/20/1992WO1992002973A1 Building components
02/13/1992DE4024262A1 Radar screening device for aircraft - uses abutting triangles of screening film along both sides of sharply tapered edge
02/11/1992CA1295541C Microwave-absorptive composite
02/04/1992US5085931 Insulating microwave radiation absorber of polycrystalline magnetic metallic filaments dispersed in a dielectric binder
01/1992
01/29/1992EP0468887A1 High frequency broadband absorption structures
01/28/1992US5084705 Facade construction in high rise structures
01/22/1992EP0466839A1 Electromagnetic wave attenuating and deicing structure.
01/21/1992US5083128 Low observability aperture design for expendable countermeasures devices
01/21/1992US5083127 Thermal barrier facade construction of high rise structures and a process for fabrication of a thermal barrier
01/21/1992CA1294677C Composite magnetic material and its production process
01/14/1992US5081465 Spatially selective device for the absorption of electromagnetic waves, for a microwave lens
01/14/1992US5081455 Electromagnetic wave absorber
01/14/1992US5080165 Protective tarpaulin
12/1991
12/31/1991US5077556 Canopy for screening objects
12/26/1991WO1991020179A1 Body for absorbing electromagnetic wave
12/03/1991USH1002 Microwave absorbing material
12/03/1991US5070339 Tapered-element array antenna with plural octave bandwidth
11/1991
11/27/1991EP0413690A4 Infrared signature control mechanism
11/14/1991DE4014864A1 Protective screening against radiation from earth magnetic field - uses electronically controlled magnetic coil with core e.g. on floor of building
11/13/1991EP0456554A2 Electrical conducting element and producing method
11/07/1991CA2041823A1 Electrical conductor and manufacturing process thereof
11/05/1991US5063384 Aircraft construction
10/1991
10/30/1991EP0454032A1 Absorber
10/24/1991DE4012783A1 Multi-layer absorber for electromagnetic radiation e.g. for satellite - uses dielectric crystal layers with different crystal types or sizes
10/24/1991DE4012672A1 Surface resistor for electromagnetic esp. radar wave absorber - contg. fire extinguishing and/or fire retardant substance to give incombustible absorber
10/23/1991EP0318510B1 Web material for camouflage against electromagnetic radiation
10/16/1991CN1055448A Microwave antenna unit
10/15/1991US5056817 Temperature-rise limiting automobile bra
10/02/1991EP0449107A2 Microwave antenna unit
10/01/1991US5053786 Broadband directional antenna
10/01/1991US5053712 Method for comparing the quality of rf absorbers
09/1991
09/19/1991DE4008660A1 Window glass system for high buildings - has double outer skin with layer of radar absorbing material and inner panel
09/19/1991DE4007986C1 Aircraft structure with cavities - filled with material absorbing or reflecting radar vanes for camouflage or imaging
09/18/1991EP0446408A1 Wall element minimizing radar reflections
09/17/1991US5049893 Microwave energy distributor capable of radiating directly
09/10/1991US5047296 Composite magnetic material and its production process
09/05/1991DE4006352A1 Radar absorber for aircraft or spacecraft - has dielectric properties variable using alternate high and low conductivity layers
08/1991
08/29/1991DE4005676A1 Radar wave absorber for building - uses ceramic plates attached to building wall with directly attached reflective layer
08/28/1991EP0443564A2 Absorber for electromagnetic waves
08/22/1991WO1991012173A1 Electromagnetic wave attenuating and deicing structure
08/22/1991DE4005297A1 Electromagnetic wave screen for ventilation ducts - has housing with perforated bottom, with tubes fitting into bottom perforations
08/14/1991DE4003908A1 Highly-filled high-temp. polymers for electromagnetic screening - contain aromatic polyether-sulphone, polyether-ketone, polyimide etc., and above 70 wt. per cent metal-ferrite, -titanate or -zirconate
07/1991
07/31/1991EP0439337A2 Broad-band wave absorber
07/30/1991US5036211 Infrared signature control mechanism
07/02/1991US5028928 Ultra-stable, stressed-skin inflatable target support systems
06/1991
06/26/1991EP0434374A2 Low noise dual polarization electro-magnetic power reception and conversion system
06/19/1991EP0432426A2 Thin layer absorber
06/13/1991WO1991008576A1 Composition for the manufacture of a material with dielectric or pyroelectric properties, and process for the manufacture of this material
06/12/1991EP0432034A1 Device for spatially selective absorption of electro-magnetic waves for an ultra-high frequency lens
05/1991
05/23/1991DE3938238A1 Attenuating absorber for electromagnetic waves - has stretched conductor mounted parallel to surface which reflects EM waves on electrically insulated substrate
05/15/1991CN1051320A Prepn. method of complex superfine metal and its oxide wave-absorbing agent
05/14/1991US5016185 Electromagnetic pyramidal cone absorber with improved low frequency design
05/14/1991US5016015 Aircraft construction
05/08/1991EP0426566A1 Multifocal receiving antenna with one single pointing direction for reception from several satellites
05/07/1991US5014070 Radar camouflage material
05/07/1991US5014060 Aircraft construction
05/02/1991WO1991005979A1 Polyaniline compositions, process for their preparation and uses thereof
05/02/1991EP0425350A1 Layers with magnetic or dielectric anisotropy, stratified composite material comprising these layers and their process of manufacture
05/02/1991EP0425262A2 Absorbers
05/01/1991WO1991006988A1 Multifocal receiving antenna with a single plotting direction for several satellites
05/01/1991CA2044586A1 Antenne de reception multifocale a direction de pointage unique pour plusieurs satellites
04/1991
04/24/1991EP0424132A2 Microwave radiation absorbing adhesive
04/24/1991CA2028243A1 Dielectric or magnetic anisotropy layers, laminated composite material incorporating said layers and their production process
04/19/1991CA2024923A1 Microwave radiation absorbing adhesive
04/18/1991WO1991005376A1 Bulk rf absorber apparatus and method
04/11/1991DE3732779A1 Camouflage material for radar, infrared and millimetre wave detection - comprises mixt. of pulverised semiconductors and ferrite(s), embedded in neutral material e.g. resin
04/03/1991EP0420513A1 Microwave-absorbing material
03/1991
03/26/1991US5003311 Fiber composite with layers matched to peak radar wave attenuation
03/21/1991DE4023750A1 Anti-stealth radar location - using plate lens of plastic or pigmented plastic spaced from antenna to give virtual gain
02/1991
02/27/1991EP0414613A2 Method of making a surface element for absorbing electromagnetic waves
02/27/1991EP0413690A1 Infrared signature control mechanism
02/21/1991DE3927035A1 Ventilator and venting system for absorption rooms - has absorber channel between air inlet and outlet apertures, and supply and discharge lines for EM wave attenuation
02/21/1991DE3730435C1 Laminated heatable radar absorber - has electrically-conducting mutually isolated heating layer surface elements
02/07/1991DE3920110A1 Radome or radar absorber with adjustable transparency - has photosensitive layer with inside light source controlling EM state from reflection to transparency
02/06/1991EP0411198A1 Absorber for electromagnetic and acoustic waves
01/1991
01/31/1991DE3925247A1 Defined field strengths absorber - uses two coupled metal cones with internal conductor and defined EM field
01/29/1991US4989006 Microwave absorption system
01/09/1991EP0407258A1 Ultrahigh frequency energy distributor radiating directly
01/02/1991EP0405077A1 Façade cover for rising structures
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