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