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)
12/1987
12/29/1987US4716417 Holographic aircraft antenna
11/1987
11/25/1987EP0246544A1 Device for the EMI testing of electronic equipments
10/1987
10/28/1987EP0243162A2 Multi-layered microwave absorber and method of manufacturing the same
10/28/1987EP0243161A2 Microwave-absorptive composite
10/14/1987EP0240809A2 Electromagnetic radiation absorbing plastic compositions containing ferro- and/or piezoelectric material
10/13/1987US4700190 Missile decoy radar cross section enhancer
10/08/1987DE3500383A1 Method for preventing high-frequency electromagnetic location by means of magnetisable "metal oxides", pure elements and rare earths and of oxides from metal alloys and mixtures of the abovementioned for anti-radar purposes for military targets of maritime and airborne or other type
09/1987
09/23/1987EP0238291A1 Electromagnetic wave absorbers
09/09/1987EP0235884A1 Omnidirectional antenna
08/1987
08/27/1987DE3605430A1 Device for reducing radar reflection
08/18/1987US4688040 For targets
07/1987
07/07/1987USH308 Fabric visual/infrared/radar decoys
07/02/1987DE3344023A1 Method for preventing high-frequency electromagnetic location by means of special ferrite materials for anti-radar purposes for military targets of maritime, aeromobile or other types
06/1987
06/23/1987CA1223345A1 Horn-reflector microwave antennas with absorber lined conical feed
06/09/1987US4672387 Antenna systems for omnidirectional pattern
06/02/1987CA1222562A1 Low side lobe gregorian antenna
05/1987
05/13/1987EP0221181A1 Compact antenna range employing shaped reflectors
03/1987
03/19/1987DE3533211A1 Parabolic antenna for directional-radio systems
03/03/1987US4647940 Parallel plate waveguide antenna
02/1987
02/10/1987CA1217627A Camouflage material for use as protection against radar observation
01/1987
01/20/1987US4638268 Water circulation within a hollow body
12/1986
12/03/1986EP0203709A1 Attenuation of microwave signals
12/02/1986US4626863 Low side lobe Gregorian antenna
11/1986
11/25/1986US4624865 Electrically conductive microballoons and compositions incorporating same
11/25/1986US4624798 Electrically conductive magnetic microballoons and compositions incorporating same
11/25/1986CA1214546A1 Non-resonant monopole antenna
11/18/1986CA1214246A1 Radar camouflage material
11/06/1986WO1986006550A1 Compact antenna range employing shaped reflectors
11/04/1986US4621012 Camouflage net having a semiconductive layer
09/1986
09/24/1986EP0195244A1 Aircraft skin antenna
09/16/1986US4612543 Integrated high-gain active radar augmentor
08/1986
08/19/1986US4606966 Camouflage controlling reflection of both long and short radar waves
08/19/1986US4606848 Absorption, scattering; microwaves
08/05/1986US4604629 Axial conductance angular filter
04/1986
04/29/1986CA1203873A1 Electromagnetic wave absorbers
04/23/1986EP0178319A1 Horn reflector antenna with absorber lined conical feed
04/15/1986EP0161245A4 Low density, electromagnetic radiation absorption composition.
04/08/1986US4581284 With radar absorbing filler in fiber plies in varying concentration
03/1986
03/19/1986EP0174579A2 Shaped beam antenna
12/1985
12/31/1985US4562440 Antenna coupler with ribbon gasket
12/10/1985US4557965 Layer of electroconductive fibrus, layer of mosaic patterned metal
12/04/1985EP0162979A1 Electrically conductive microballoons and compositions incorporating same
11/1985
11/21/1985EP0161245A1 Low density, electromagnetic radiation absorption composition.
10/1985
10/10/1985WO1985004527A1 Horn reflector antenna with absorber lined conical feed
07/1985
07/09/1985US4528229 Camouflage material for use as protection against radar observation
06/1985
06/11/1985US4522890 Alternating layers of high and conductivity metals or alloys
05/1985
05/23/1985WO1985002265A1 Low density, electromagnetic radiation absorption composition
05/08/1985EP0140598A1 Horn-reflector microwave antennas with absorber lined conical feed
04/1985
04/23/1985US4513290 Non-resonant coaxial monopole antenna
04/16/1985CA1185696A1 Reflector-type microwave antennas with absorber lined conical feed
04/10/1985EP0136818A1 Dual mode feed horn or horn antenna for two or more frequency bands
04/10/1985EP0136817A1 Low side lobe gregorian antenna
03/1985
03/26/1985US4507354 Electromagnetic wave absorbers of silicon carbide fibers
03/19/1985US4506267 Frequency independent shielded loop antenna
01/1985
01/29/1985US4496950 Enhanced wide angle performance microwave absorber
11/1984
11/14/1984EP0124917A1 A camouflage material for use as protection against radar observation
10/1984
10/30/1984US4480256 Microwave absorber
10/17/1984EP0122243A2 A method for manufacturing a radar camouflage material
10/17/1984EP0121655A2 Fibre composite
09/1984
09/11/1984US4471015 Polymer matrix with pigments or carbon black particles encapsulated by metal
08/1984
08/08/1984EP0115270A2 Frequency independent antenna
07/1984
07/10/1984US4459596 Coaxial antenna configuration with high inter-element isolation
03/1984
03/27/1984US4439768 Radiation protection devices in medical and communications fields
03/06/1984US4435465 Composite material for shielding against electromagnetic radiation
11/1983
11/08/1983US4414339 Low density, electromagnetic radiation absorption composition
10/1983
10/18/1983US4410892 Reflector-type microwave antennas with absorber lined conical feed
06/1983
06/07/1983US4387122 Method for the manufacture of material absorbing ultra-high frequency waves
04/1983
04/26/1983US4381510 Microwave absorber
01/1983
01/11/1983US4368473 Microwave lens ripple filter
01/05/1983EP0068092A2 Micro-wave absorbers with very small reflexion and their use
12/1982
12/09/1982WO1982004357A1 Reflector-type microwave antennas with absorber lined conical feed
12/08/1982EP0066455A1 Reflector-type microwave antennas with absorber lined conical feed
11/1982
11/16/1982US4359737 Artificial trees for absorbing and scattering radiation
10/1982
10/05/1982US4353069 Absorptive coating for the reduction of the reflective cross section of metallic surfaces and control capabilities therefor
09/1982
09/14/1982US4349827 Parabolic antenna with horn feed array
08/1982
08/31/1982US4347487 High frequency attenuation cable
08/03/1982US4343002 Paraboloidal reflector spatial filter
06/1982
06/23/1982EP0054098A1 Metal backed floor which simulates the properties of an infinitely thick earth
06/02/1982EP0053036A1 Electrical system
04/1982
04/27/1982US4327364 Apparatus for converting incident microwave energy to thermal energy
03/1982
03/02/1982CA1119292A1 Parabolic reflector antenna with optimal radiative characteristics
01/1982
01/06/1982EP0043040A1 Compound material for screening against electro-magnetic radiation
09/1981
09/01/1981CA1108276A1 Metal oxide dielectric material
08/1981
08/04/1981US4282530 Cylindrical paraboloid weather cover for a horn reflector antenna with wave absorbing means
05/1981
05/20/1981EP0028967A1 Process for producing materials absorbing hyperfrequency waves and absorbing material so obtained
05/06/1981EP0028018A1 An improved phased array antenna system
04/1981
04/21/1981US4263599 Parabolic reflector antenna for telecommunication system
03/1981
03/31/1981US4259674 Phased array antenna arrangement with filtering to reduce grating lobes
02/1981
02/03/1981US4249183 Periscope arrangement with protection against parasitic radiation
10/1980
10/28/1980US4231043 Technique for reducing near-in sidelobes of an offset antenna
09/1980
09/16/1980CA1085955A1 Periscopic assembly with supporting tube and arrays of such assemblies
07/1980
07/29/1980CA1082446A1 Powder products
06/1980
06/24/1980US4209791 Antenna apparatus for bearing angle determination
05/1980
05/14/1980EP0010712A1 Use of metallized textile surfaces as protection from microwave radiation
05/14/1980EP0010568A1 Method and apparatus for camouflaging a metallic object prevent radiometer locating by adapting its own radiation to the ambiant radiation
01/1980
01/22/1980US4185287 Mechanically scanned antenna system
01/22/1980US4185286 Nondispersive array antenna
01/15/1980CA1070004A1 Camouflage material
11/1979
11/28/1979EP0005487A1 Parabolic reflector antenna with optimal radiative characteristics
10/1979
10/30/1979US4173018 Anti-radar means and techniques
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