| Patents for H01Q 21 - Aerial arrays or systems (25,127) |
|---|
| 12/10/1980 | EP0020196A1 Ringplate-type microwave array antenna with feeding system and its application in radars |
| 11/26/1980 | EP0019548A1 Radiating element with parallel planes and its use in creating an antenna array |
| 11/25/1980 | US4236160 Loop driven element antenna system and voltage feed system |
| 11/12/1980 | EP0018878A1 Airborne IFF system having a radar and an interrogation antenna |
| 11/12/1980 | EP0018476A1 Crossed slot cavity antenna |
| 11/11/1980 | US4233607 Apparatus and method for improving r.f. isolation between adjacent antennas |
| 10/21/1980 | US4229746 Loop coupler commutating feed for scanning a circular array antenna |
| 10/21/1980 | US4229745 Edge slotted waveguide antenna array with selectable radiation direction |
| 10/15/1980 | EP0017037A1 Assembly of at least two directionally and/or omnidirectionally inclined antennas coupled to a power dividing device |
| 10/15/1980 | EP0016970A1 Antenna for transmitting and receiving electromagnetic radiation with horizontal polarisation |
| 09/30/1980 | US4225869 Multislot bicone antenna |
| 09/16/1980 | US4223317 Dual polarization antenna couplets |
| 09/16/1980 | US4223315 Stacked arrays for broadcasting elliptically polarized waves |
| 09/16/1980 | US4223283 Two into three port phase shifting power divider |
| 09/16/1980 | CA1085956A1 Iff antenna arrangement |
| 09/16/1980 | CA1085955A1 Periscopic assembly with supporting tube and arrays of such assemblies |
| 09/09/1980 | US4222055 Around-the-mast rotary coupler |
| 09/09/1980 | US4222054 Radio frequency lens |
| 09/02/1980 | US4220956 Collinear series-fed radio frequency antenna array |
| 08/19/1980 | US4218687 Broadband dipole antenna system with coaxial feed-line coated with ferrite particles to reduce line currents |
| 08/19/1980 | US4218686 Yagi-type antennas and method |
| 08/19/1980 | US4218685 Coaxial phased array antenna |
| 08/12/1980 | US4217592 Quasi-linear antenna array |
| 08/12/1980 | US4217590 Electromagnetic lens for RF aerials |
| 08/05/1980 | US4216473 MIPS Hover attachment |
| 07/15/1980 | US4213132 Antenna system with multiple frequency inputs |
| 07/09/1980 | EP0013240A1 Common antenna for primary and secondary radar |
| 06/24/1980 | US4209791 Antenna apparatus for bearing angle determination |
| 06/24/1980 | CA1080351A1 Radio frequency antenna arrays of radiating slot apertures |
| 06/24/1980 | CA1080350A1 Phase shifter and polarization switch |
| 06/24/1980 | CA1080338A1 Hard clipped beam former |
| 06/17/1980 | US4208663 Antenna input circuit for AM/FM radio receiver |
| 06/17/1980 | US4208660 Radio frequency ring-shaped slot antenna |
| 06/10/1980 | US4207573 Dual-frequency antenna system with common reflector illuminated by different feeds |
| 06/03/1980 | CA1078957A1 Ghost cancellation device |
| 05/20/1980 | US4204212 Conformal spiral antenna |
| 05/20/1980 | CA1078058A1 Stacked arrays for broadcasting elliptically polarized waves |
| 05/13/1980 | US4203118 Antenna for cross polarized waves |
| 05/13/1980 | US4203114 Digital bearing indicator |
| 04/22/1980 | US4199763 Electrical-length equalizer for horn antennas |
| 04/15/1980 | US4198641 Rotating field polarization antenna system |
| 04/08/1980 | US4197549 Slot antenna |
| 04/08/1980 | US4197541 Polarization agile planar array |
| 04/02/1980 | EP0009063A1 Parallel plate electromagnetic lens |
| 04/01/1980 | US4196436 Differential backlobe antenna array |
| 03/11/1980 | US4193077 Directional antenna system with end loaded crossed dipoles |
| 02/19/1980 | US4189691 Microwave terminating structure |
| 02/12/1980 | CA1071754A1 Multiple input antenna system |
| 02/05/1980 | US4187507 Multiple beam antenna array |
| 01/29/1980 | US4186403 Antenna formed of non-uniform series connected sections |
| 01/29/1980 | CA1070823A1 Interleaved antenna array for use in a multiple input antenna system |
| 01/29/1980 | CA1070781A1 Multiple polarization switch |
| 01/23/1980 | EP0007222A1 Stripline antennas |
| 01/22/1980 | CA1070420A1 Modified logarithmic type of aerial array |
| 01/15/1980 | US4184163 Broad band, four loop antenna |
| 12/25/1979 | US4180820 Circularly polarized antenna system using a combination of horizontal and bent vertical dipole radiators |
| 12/25/1979 | US4180818 Doppler navigation microstrip slanted antenna |
| 12/25/1979 | US4180817 Serially connected microstrip antenna array |
| 12/11/1979 | US4178581 Integrated antenna aperture |
| 12/11/1979 | US4178574 Horn antenna with rotating waveguide and polarization lens means |
| 12/04/1979 | US4177467 Waveguide receiving antenna |
| 11/27/1979 | US4176322 Radio frequency lens |
| 10/30/1979 | US4173019 Microstrip antenna array |
| 10/23/1979 | US4172257 Ground station antenna for satellite communication systems |
| 10/23/1979 | CA1065051A1 Multiband antenna for window panes |
| 10/02/1979 | US4170012 Corner fed electric microstrip dipole antenna |
| 10/02/1979 | CA1063716A1 Limited scan array antenna systems with sharp cutoff of element pattern |
| 09/25/1979 | US4169266 Aerial system for broadcasting having a passive middle antenna flanked by two end-fed antennas |
| 09/25/1979 | US4169265 P-Band loop antennas in radial array |
| 09/25/1979 | CA1063235A1 Endfire-type phased array antenna |
| 09/18/1979 | US4168503 Antenna array with printed circuit lens in coupling network |
| 09/11/1979 | US4167739 Instrument landing system glidepath antenna array and drive therefor |
| 09/04/1979 | CA1061891A1 Polarization insensitive lens |
| 08/14/1979 | US4164743 Drive arrangement for an instrument landing system glidepath antenna |
| 08/14/1979 | CA1060577A1 Antenna feed system |
| 07/31/1979 | US4163236 Reactively loaded corner fed electric microstrip dipole antennas |
| 07/31/1979 | US4163235 Satellite system |
| 07/24/1979 | CA1059234A1 Multiband antenna for window panes |
| 07/17/1979 | US4161736 Direction finding antenna and system |
| 07/10/1979 | US4160978 Circularly polarized loop and helix panel antennas |
| 07/10/1979 | US4160976 Broadband microstrip disc antenna |
| 07/03/1979 | US4160145 Microwave applicator device |
| 06/19/1979 | CA1056943A1 Constant beamwidth antenna |
| 06/19/1979 | CA1056942A1 Stripline antenna arrays |
| 06/13/1979 | EP0002233A1 Rotatable short-wave antenna support |
| 05/29/1979 | CA1055601A1 Broad-band antenna |
| 05/22/1979 | US4156242 Light-weight low-cost antenna element |
| 05/16/1979 | EP0001883A1 Apparatus for improving R.F. isolation between adjacent microstrip antenna arrays |
| 05/15/1979 | US4155092 Omnidirectional communications antenna |
| 05/15/1979 | US4155091 Compact omnidirectional antenna array |
| 05/01/1979 | US4152707 Antenna feed system |
| 04/24/1979 | US4151529 Radio beacon for aerial navigation system |
| 04/17/1979 | US4150383 Monopulse flat plate antenna |
| 04/03/1979 | US4148038 Circuit arrangement for mutually decoupled connecting of plural transmitters |
| 03/27/1979 | US4146895 Geodesic lens aerial |
| 03/27/1979 | US4146893 System for compensating for cross polarization coupling |
| 03/20/1979 | US4145696 Broad band, omnidirectional UHF, VHF antenna |
| 03/06/1979 | US4143380 Compact spiral antenna array |
| 02/13/1979 | USRE29911 Microstrip antenna structures and arrays |
| 12/26/1978 | US4131896 Dipole phased array with capacitance plate elements to compensate for impedance variations over the scan angle |