| Patents for H01Q 19 - Combinations of primary active aerial elements and units with secondary devices, e.g. with quasi-optical devices, for giving the aerial a desired directional characteristic (10,176) |
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| 02/17/1981 | US4251818 Corner reflector circularly polarized antenna |
| 02/10/1981 | US4250508 Scanning beam antenna arrangement |
| 02/10/1981 | US4250507 Directional circular loop beam antenna |
| 02/10/1981 | US4250506 Sidelobe discriminator |
| 02/03/1981 | US4249183 Periscope arrangement with protection against parasitic radiation |
| 01/28/1981 | EP0022991A1 Antenna arrangement for masking the side lobe pattern of a highly directional main antenna and its use with a panoramic search radar antenna |
| 01/20/1981 | US4246586 Radio antennae |
| 01/07/1981 | EP0021866A1 Device for reducing jamming signals with a rotating linear polarization and use thereof in a radar |
| 01/07/1981 | EP0021252A1 Pillbox type radar antenna with integrated IFF antenna |
| 01/07/1981 | EP0021251A1 Pillbox-radar antenna with integrated IFF antenna |
| 01/07/1981 | EP0021193A1 Combined antenna system |
| 01/06/1981 | CA1093207A1 Satellite communications transmission systems |
| 12/23/1980 | US4241353 Multimode monopulse feed and antenna incorporating same |
| 12/16/1980 | US4240080 Short backfire antenna with sum and error patterns |
| 12/10/1980 | EP0019775A1 Antenna arrangement, particularly Cassegrain antenna arrangement |
| 12/02/1980 | US4237464 Radar antenna employing phase shifted collinear dipoles |
| 11/26/1980 | EP0019548A1 Radiating element with parallel planes and its use in creating an antenna array |
| 11/25/1980 | US4236161 Array feed for offset satellite antenna |
| 11/18/1980 | CA1089982A1 Rotationally-symmetrical antenna systems |
| 11/12/1980 | EP0018878A1 Airborne IFF system having a radar and an interrogation antenna |
| 11/04/1980 | US4232322 Antenna having radiation pattern with main lobe of generally elliptical cross-section |
| 10/28/1980 | US4231043 Technique for reducing near-in sidelobes of an offset antenna |
| 10/21/1980 | US4229742 Cubicle Quad antenna |
| 10/15/1980 | EP0017589A1 Cassegrain antenna incorporated in a radome |
| 10/07/1980 | CA1087305A1 Feed system for microwave antenna |
| 09/17/1980 | EP0015837A2 Parallel-plane antenna with rotating polarisation |
| 09/17/1980 | EP0015804A2 Polarizing device and microwave antenna comprising same |
| 09/16/1980 | US4223317 Dual polarization antenna couplets |
| 09/16/1980 | US4223316 Antenna structure with relatively offset reflectors for electromagnetic detection and space telecommunication equipment |
| 09/16/1980 | CA1085955A1 Periscopic assembly with supporting tube and arrays of such assemblies |
| 09/03/1980 | EP0015018A1 A lens antenna arrangement |
| 09/02/1980 | US4220957 Dual frequency horn antenna system |
| 08/26/1980 | US4219802 Scanning barrier for the discrimination and counting of objects and more specifically of vehicles in transit through a laminar barrage of electromagnetic microwaves |
| 08/20/1980 | EP0014605A1 Reverse Cassegrain antenna for multipurpose radar |
| 08/19/1980 | US4218686 Yagi-type antennas and method |
| 08/19/1980 | US4218683 Range focus lens |
| 08/19/1980 | CA1084160A1 Microstrip-fed parasitic array |
| 08/12/1980 | US4217590 Electromagnetic lens for RF aerials |
| 08/06/1980 | EP0014121A1 Microwave heating apparatus |
| 07/29/1980 | US4214807 Holographic optical satellite communication system |
| 07/29/1980 | CA1082801A1 Fog clearing by microwave power |
| 07/15/1980 | US4213130 Monopulse radar apparatus |
| 07/15/1980 | US4213126 Airport surface detection equipment (ASDE) |
| 07/15/1980 | CA1081845A1 Beam scanning |
| 07/09/1980 | EP0013240A1 Common antenna for primary and secondary radar |
| 06/17/1980 | US4208661 Antenna with two orthogonally disposed parabolic cylindrical reflectors |
| 06/10/1980 | US4207573 Dual-frequency antenna system with common reflector illuminated by different feeds |
| 06/03/1980 | CA1078956A1 Microstrip feed with reduced aperture blockage |
| 05/27/1980 | CA1078498A1 Microwave radiation method and apparatus with a combined diffraction edge and radiation screen |
| 05/13/1980 | US4203105 Scanable antenna arrangements capable of producing a large image of a small array with minimal aberrations |
| 05/06/1980 | US4201992 Multibeam communications satellite |
| 04/29/1980 | CA1076696A1 Aerial system |
| 04/15/1980 | US4198639 Parabolic and log periodic antennas combined for compact high-gain broadband antenna system |
| 04/08/1980 | US4197546 Millimeter wave source incorporating a solid-state active component and a directional antenna |
| 04/02/1980 | EP0009063A1 Parallel plate electromagnetic lens |
| 03/25/1980 | US4195302 Double reflector antenna with feed horn protection |
| 03/25/1980 | US4195301 Disc antenna feed for parabolic reflector |
| 02/12/1980 | US4188632 Rear feed assemblies for aerials |
| 02/05/1980 | US4187508 Reflector antenna with plural feeds at focal zone |
| 02/05/1980 | US4187507 Multiple beam antenna array |
| 01/29/1980 | US4186402 Cassegrainian antenna with beam waveguide feed to reduce spillover |
| 01/29/1980 | US4186400 Aircraft scanning antenna system with inter-element isolators |
| 01/22/1980 | US4185286 Nondispersive array antenna |
| 01/15/1980 | US4184163 Broad band, four loop antenna |
| 01/09/1980 | EP0006391A1 Periscopic feed system for two-band antenna |
| 12/11/1979 | US4178576 Feed system for microwave antenna employing pattern control elements |
| 11/28/1979 | EP0005487A1 Parabolic reflector antenna with optimal radiative characteristics |
| 11/27/1979 | US4176358 Reflector antenna with matched feed system |
| 11/27/1979 | CA1067204A1 Satellite tracking antenna with multiple reflectors |
| 10/23/1979 | US4172257 Ground station antenna for satellite communication systems |
| 09/25/1979 | US4169266 Aerial system for broadcasting having a passive middle antenna flanked by two end-fed antennas |
| 09/25/1979 | CA1063236A1 Dish antenna with integral deicer |
| 09/19/1979 | EP0004215A1 Multimode microwave source and monopulse antenna incorporating such a source |
| 09/11/1979 | CA1062364A1 Antenna with echo cancelling elements |
| 09/04/1979 | CA1061892A1 Constant beam width antenna reflector |
| 09/04/1979 | CA1061891A1 Polarization insensitive lens |
| 08/28/1979 | US4166276 Offset antenna having improved symmetry in the radiation pattern |
| 08/28/1979 | CA1061451A1 Antenna with echo cancelling elements |
| 08/22/1979 | EP0003485A1 Airport surface detection equipment |
| 07/17/1979 | US4161737 Helical antenna |
| 07/11/1979 | EP0002982A1 Conical scan antenna for tracking radar |
| 07/10/1979 | US4160980 Dipole antenna with parabolic reflector |
| 06/19/1979 | CA1056943A1 Constant beamwidth antenna |
| 05/22/1979 | US4156243 Paraboloid reflector antenna |
| 05/16/1979 | EP0001848A1 Monopulse radar apparatus |
| 03/20/1979 | US4145695 Launcher reflectors for correcting for astigmatism in off-axis fed reflector antennas |
| 03/13/1979 | US4144535 Method and apparatus for substantially reducing cross polarized radiation in offset reflector antennas |
| 03/06/1979 | US4143377 Omnidirectional antenna with a directivity diagram adjustable in elevation |
| 02/27/1979 | US4142190 Microstrip feed with reduced aperture blockage |
| 02/06/1979 | US4138682 Cubical quad antennas with spreader-reinforced crossarms |
| 02/06/1979 | CA1048145A1 Antenna with echo cancelling elements |
| 01/10/1979 | EP0000305A1 Antenna having low side-lobes and high polarisation purity |
| 12/26/1978 | US4131896 Dipole phased array with capacitance plate elements to compensate for impedance variations over the scan angle |
| 12/12/1978 | US4129872 Microwave radiating element and antenna array including linear phase shift progression angular tilt |
| 11/28/1978 | US4127857 Radio frequency antenna with combined lens and polarizer |
| 10/24/1978 | US4122453 Antenna feed network |
| 10/17/1978 | US4121215 Corner reflector antenna for DF and tracking applications |
| 10/10/1978 | US4119951 Microwave intrusion sensing units and antenna therefor |
| 10/03/1978 | US4118706 Microstrip-fed parasitic array |
| 10/03/1978 | CA1039843A1 Aberration correcting subreflectors for toroidal reflector antennas |