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