Patents
Patents for H01Q 15 - Devices for reflection, refraction, diffraction, or polarisation of waves radiated from an aerial, e.g. quasi-optical devices (7,888)
06/1991
06/02/1991CA2070172A1 Antenna
05/1991
05/29/1991EP0428877A2 Method and hardware for controlled aerodynamic dispersion of organic filamentary materials
05/21/1991US5017940 Electromagnetic wave reflector for an antenna and its production method
05/21/1991US5017939 Two layer matching dielectrics for radomes and lenses for wide angles of incidence
05/15/1991EP0427567A2 Parabolic antenna reflector and process for preparing same
05/14/1991US5014484 Module for expandable truss structure and expandable truss structure employing said module
05/10/1991CA2029573A1 Parabolic antenna reflector and process for preparing same
05/07/1991US5014070 Radar camouflage material
05/02/1991EP0425350A1 Layers with magnetic or dielectric anisotropy, stratified composite material comprising these layers and their process of manufacture
04/1991
04/24/1991CA2028243A1 Dielectric or magnetic anisotropy layers, laminated composite material incorporating said layers and their production process
04/16/1991US5008677 Anti-jamming device for a radar provided with a reflector antenna
04/09/1991US5007058 Millimeter wave power generator
04/09/1991CA1282861C Electroconductive nonwoven fabric-resin composite articles and methodfor production thereof
04/04/1991WO1991004589A1 Detection of airborne craft
04/04/1991DE3930856A1 Automatic equaliser for polariser control in satellite receiver - has coarse, manual adjuster for polarising direction and additional fine adjuster
04/03/1991EP0420137A2 Two layer matching dielectrics for radomes and lenses for wide angles of incidence
04/03/1991CN1050470A Plate-type broad-band microwave antenna with reflecting surface
03/1991
03/20/1991EP0417356A1 Dual frequency microwave feed assembly
03/20/1991EP0417244A1 Radar reflectors
03/19/1991US5001495 Adaptive microwave spatial filter operating on-reflection, and a corresponding method
03/13/1991EP0416080A1 Improvements in antenna polarizers
03/12/1991US4999277 Computer aided design, dichroic parabolic radio frequency reflector
03/07/1991DE4026489A1 Radar responsive reflector - for vehicles based on reflecting and non-reflecting pattern of stripes of specified lacquer
03/06/1991EP0415804A1 Dismountable and air-transportable antenna for satellite communications
03/05/1991US4998114 Portable parabolic antenna apparatus
02/1991
02/27/1991EP0413690A1 Infrared signature control mechanism
02/26/1991US4996536 Radar reflectors
02/21/1991WO1991002390A1 Improved feeds for dual frequency feed assembly
02/19/1991US4994816 Portable antenna apparatus
02/07/1991DE4024488A1 Radiation screen mfr. - from totally reflective fibres having vapour deposited metal coating
02/07/1991DE3925526A1 Radiation screen mfr. - from totally reflective fibres having sputter deposited metal coating
02/07/1991DE3920110A1 Radome or radar absorber with adjustable transparency - has photosensitive layer with inside light source controlling EM state from reflection to transparency
02/05/1991US4990918 Radar reflector to enhance radar detection
01/1991
01/29/1991US4989015 Unfurlable mesh reflector
01/29/1991US4989007 Passive radar augmented projectile (PRAP)
01/23/1991EP0408630A1 Reflector for electromagnetic radiation
01/22/1991US4987418 Ferroelectric panel
01/17/1991DE3932398C1 Matching aerial reflector to specified ideal reflector contour - determining deviations of aerial reflector from ideal contour at measurement points on surface of reflector
01/02/1991EP0405077A1 Façade cover for rising structures
12/1990
12/25/1990US4980688 Regenerator
12/04/1990US4975712 Two-dimensional scanning antenna
11/1990
11/27/1990US4973965 Passive radar target
11/27/1990CA1276840C Apparatus and method for making paraboloidal surfaces
11/22/1990EP0397967A1 Radar-absorbing outer façade
11/20/1990WO1990014696A1 Antenna apparatus with reflector or lens consisting of a frequency scanned grating
11/20/1990US4972197 Integral heater for composite structure
11/20/1990CA2058304A1 Antenna apparatus with reflector or lens consisting of a frequency scanned grating
11/13/1990US4970634 Radar transparent materials
11/06/1990CA1275842C Retroreflector for the reflection of electromagnetic rays
11/01/1990WO1990013154A1 Dual frequency microwave feed assembly
10/1990
10/31/1990EP0394732A1 Outer wall of a building standing close to a radar
10/31/1990EP0394220A1 A passive radar target
10/29/1990WO1990013926A1 Radar reflecting target for reducing radar cross-section
10/29/1990CA2053872A1 Radar reflecting target
10/23/1990US4965868 Electromagnetic polarization selector
10/23/1990CA1275494C Antenna apparatus for receiving radio waves
10/18/1990WO1990012430A1 Radar reflectors
10/11/1990DE3911445A1 Hollow mirror for focusing incident electromagnet waves
10/04/1990CA2013740A1 Radar reflectors
10/03/1990EP0390149A1 Collapsible truss structures
10/03/1990EP0389619A1 Curved plastic body with circuit pattern and method of making.
09/1990
09/20/1990WO1990010958A1 Improvements in antenna polarizers
09/12/1990CN2062118U Portable c-waveband antenna
09/11/1990US4955129 Method of making an integral heater for composite structure
09/07/1990WO1990010318A1 A reflector for electromagnetic energy
08/1990
08/29/1990EP0384021A1 Antenna system having azimuth rotating directive beam with selectable polarization
08/21/1990CA1273071A1 Frequency selective screen having sharp transition
07/1990
07/31/1990US4944087 Method of making a curved plastic body with circuit pattern
07/05/1990DE3940050A1 Conductive textile sheet of metallised glass filaments - for mfg. conductive plastics composite materials, comprise discontinuous metallised glass silk elementary filaments, etc.
07/03/1990US4939526 Antenna system having azimuth rotating directive beam with selectable polarization
07/03/1990US4938270 Spherical cloth weaving machine with shuttle chucks
07/03/1990US4937935 Process for making an assembly of electrically conductive patterns on an insulating surface of complex form
07/03/1990CA1271014A1 Collapsible truss unit, and frameworks constructed by combinations of such units
06/1990
06/28/1990WO1990007199A1 Focussing device for a microwave antenna
06/27/1990EP0375542A1 Reflector of electromagnetic waves for an antenna, and method for its manufacture
06/26/1990US4937425 Method of making a polarizing parabolic dish antenna reflector
06/22/1990CA2004724A1 Antenna system having azimuth rotating directive beam with selectable polarization
06/21/1990CA2006192A1 Electromagnetic wave reflector for an antenna and its production method
06/20/1990CA2005973A1 Focussing device for a microwave antenna
06/14/1990WO1990006665A1 Antenna producing a millimeter wave beam having a gaussian-like distribution
06/13/1990EP0372463A1 Antenna producing a millimeter wave beam having a gaussian-like distribution
06/13/1990CN1008417B Selective screen with the characteristics of quick change and transition
06/12/1990US4932755 Optical transparency having an electromagnetic pulse shield
06/07/1990DE3840451A1 Lens antenna
06/06/1990CN2058039U Flat microwave antenna
06/06/1990CN1042807A Manufacturing method of plate-shaped parabolic antenna
05/1990
05/31/1990WO1990006004A1 Offset parabolic reflector antenna
05/31/1990WO1990006002A1 Microwave signal receiving apparatus
05/22/1990US4928130 Staggered arrangement for improving radar reflection
05/22/1990US4926910 Radio-frequency reflective fabric
05/15/1990US4926181 Deployable membrane shell reflector
05/14/1990CA2002002A1 Microwave signal receiving apparatus
05/08/1990CA1268842A1 Inflatable radar reflector
05/01/1990US4922253 High attenuation broadband high speed RF shutter and method of making same
05/01/1990US4922213 Polarizers with alternatingly circular and rectangular waveguide sections
04/1990
04/19/1990WO1990004319A1 Curved plastic body with circuit pattern and method of making
04/18/1990EP0364247A2 Optical transparency having an electromagnetic screen
04/12/1990CA2000564A1 Optical transparency having an electromagnetic pulse shield
04/10/1990US4916459 Parabolic antenna dish
04/04/1990EP0361294A1 Revolution reflector antenna
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