Patents for H01Q 21 - Aerial arrays or systems (25,127) |
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05/23/1984 | EP0108816A1 A field component diversity antenna arrangement |
05/22/1984 | US4450449 Patch array antenna |
05/22/1984 | US4450448 Apparatus and method for improving antenna sidelobe cancellation |
05/16/1984 | EP0108463A1 Radiating element for cross-polarized microwave signals and planar antenna consisting of an array of such elements |
05/01/1984 | US4446465 Low windload circularly polarized antenna |
05/01/1984 | CA1166743A1 Vhf omni-range navigation system antenna |
04/26/1984 | WO1984001669A1 Continuous ferrite aperture for electronic scanning antennas |
04/24/1984 | US4445121 Single membrane lens for space radar using microstrip antenna radiating elements |
04/17/1984 | CA1165865A1 Multifrequency reflector antenna |
04/11/1984 | EP0105103A2 Microstrip antenna system having nonconductively coupled feedline |
04/04/1984 | EP0104536A2 Microstrip reflect array for satellite communication and radar cross-section enhancement or reduction |
04/04/1984 | EP0104173A1 An electronically scanned antenna system having a linear array of yagi antennas. |
04/03/1984 | US4441108 Omnidirectional multiple-band antenna |
03/20/1984 | CA1164087A1 Array antenna system |
03/06/1984 | US4435715 Rod-excited waveguide slot antenna |
02/28/1984 | US4434426 Phased array element with polarization control |
02/28/1984 | US4434425 Multiple ring dipole array |
02/21/1984 | US4433336 Three-element antenna formed of orthogonal loops mounted on a monopole |
02/21/1984 | US4433313 Apparatus for microwave directional coupling between a waveguide and a stripline |
02/14/1984 | US4431998 Circularly polarized hemispheric coverage flush antenna |
02/14/1984 | US4431997 Compound element for image element antennas |
02/08/1984 | EP0100123A2 A directive antenna element |
01/31/1984 | US4429313 Waveguide slot antenna |
01/24/1984 | US4427984 Phase-variable spiral antenna and steerable arrays thereof |
01/17/1984 | US4426649 Folded back doublet antenna for very high frequencies and networks of such doublets |
12/27/1983 | US4423421 Slot array antenna with amplitude taper across a small circular aperture |
12/13/1983 | CA1158766A1 Rectangular beam shaping antenna |
11/15/1983 | US4415902 Array for reducing the number of antenna elements for radiating instrument landing system localizer signals |
11/08/1983 | US4414550 Low profile circular array antenna and microstrip elements therefor |
11/08/1983 | US4414516 Polarized signal receiver system |
10/18/1983 | US4410893 Dual band collinear dipole antenna |
10/18/1983 | US4410891 Microstrip antenna with polarization diversity |
10/11/1983 | US4409595 Stripline slot array |
10/04/1983 | US4408171 Noise filter with socket attached thereto |
09/27/1983 | US4407000 Combined dipole and ferrite antenna |
09/21/1983 | EP0089084A1 Flat microwave antenna structure |
09/21/1983 | EP0088948A1 Antenna comprising at least one dipole |
09/20/1983 | US4405928 Wind load reduction in tower mounted broadcast antennas |
08/24/1983 | EP0086558A1 Improvements in or relating to antenna array circuits |
08/23/1983 | US4400703 Spiral array antenna |
08/23/1983 | US4400702 Shortened antenna having coaxial lines as its elements |
08/23/1983 | US4400701 Common antenna for primary and secondary radar |
08/10/1983 | EP0085486A1 Antenna arrangement |
08/09/1983 | US4398199 Circularly polarized microstrip line antenna |
07/26/1983 | US4395714 Antenna array system usable for AM/FM receiver |
06/22/1983 | EP0082053A1 Radiating system comprising two stacked antennas working in the same frequency band |
06/15/1983 | EP0081307A1 Apparatus for transmitting and/or receiving microwave radiation |
06/14/1983 | US4388624 Radar antenna incorporating elements radiating a pseudo-omnidirectional pattern |
06/08/1983 | EP0080507A1 Broadband antennae |
06/07/1983 | CA1147851A1 Slot array antenna with amplitude taper across a small circular aperture |
05/17/1983 | US4384290 Airborne interrogation system |
05/17/1983 | CA1146668A1 Multiple antennae arrangements coupled via a power divider to provide directional and/or omnidirectional characteristics |
05/03/1983 | CA1145843A1 Coaxial phased array antenna |
04/05/1983 | US4379296 Selectable-mode microstrip antenna and selectable-mode microstrip antenna arrays |
03/30/1983 | EP0075375A1 Plane array of microwave elements radiating or receiving left or right hand polarized microwave signals |
03/29/1983 | US4378558 Endfire antenna arrays excited by proximity coupling to single wire transmission line |
03/17/1983 | WO1983000952A1 An electronically scanned antenna system having a linear array of endfire elements |
03/16/1983 | EP0074311A1 Broadband rectangular slotted wave guide |
03/15/1983 | US4376940 Antenna arrangements for suppressing selected sidelobes |
03/15/1983 | US4376937 Antenna for primary and secondary radars |
03/09/1983 | EP0073258A1 Angular error detecting device |
03/08/1983 | US4376281 Multimode array antenna |
02/16/1983 | EP0072312A2 Flat, low profile circular array antenna |
02/09/1983 | EP0071069A2 Circularly polarised microwave antenna |
02/08/1983 | US4373162 Low frequency electronically steerable cylindrical slot array radar antenna |
02/01/1983 | US4371876 Slot array antenna having a complex impedance termination and method of fabrication |
01/26/1983 | EP0070462A2 Antenna for a omnidirection radio beacon |
01/19/1983 | EP0070150A2 Antenna arrangement for personal radio transceivers |
01/18/1983 | US4369519 Cross polarization compensation system |
01/18/1983 | US4369449 Linearly polarized omnidirectional antenna |
01/04/1983 | US4367474 Frequency-agile, polarization diverse microstrip antennas and frequency scanned arrays |
12/22/1982 | EP0067573A1 Improvements in or relating to antenna arrays |
12/14/1982 | US4364050 Microstrip antenna |
12/09/1982 | WO1982004358A1 Broadband antennae |
12/09/1982 | WO1982004356A1 Linearly polarized omnidirectional antenna |
12/08/1982 | EP0066094A1 A micro-strip antenna |
11/24/1982 | EP0065467A1 Circularly polarised microwave antenna |
11/23/1982 | US4360816 Phased array of six log-periodic dipoles |
11/23/1982 | US4360813 Power combining antenna structure |
11/23/1982 | CA1136267A1 Array of annular slots excited by radial waveguide modes |
11/16/1982 | US4359742 Dual switch multimode array antenna |
11/16/1982 | US4359740 Phased array antenna with extinguishable phase shifters |
11/10/1982 | EP0064313A1 Circularly polarised microwave radiating element and flat microwave antenna using an array of such elements |
11/09/1982 | CA1135385A1 Digital bearing indicator |
10/26/1982 | US4356497 Non-dispersive array antenna and electronically scanning antenna comprising same |
10/26/1982 | US4356492 Multi-band single-feed microstrip antenna system |
10/26/1982 | CA1134502A1 Stripline antenna capable of producing radiation of a predetermined polarisation direction |
10/06/1982 | EP0061965A1 Antenna with a device for controlling the linear-polarization direction |
10/06/1982 | EP0061831A1 Improvements in or relating to stripline antennas |
10/05/1982 | US4353074 Radio frequency ridged waveguide antenna |
10/05/1982 | US4353072 Circularly polarized radio frequency antenna |
10/05/1982 | CA1133119A1 Nondissipative load termination for traveling wave array antenna |
09/29/1982 | EP0061403A1 Drift compensating device for at least a single measuring channel, and its application |
09/22/1982 | EP0060623A1 Stripline antenna |
09/14/1982 | US4349826 Simple horizontally polarized omnidirectional antenna |
09/14/1982 | US4349825 Antenna assembly for high frequency ranges |
09/14/1982 | US4349824 Around-a-mast quadrifilar microstrip antenna |
09/07/1982 | US4348680 Microwave antenna with sinuous waveguide feed |
09/07/1982 | US4348678 Antenna with a curved lens and feed probes spaced on a curved surface |
09/07/1982 | CA1131351A1 Radio frequency energy antenna |