Patents for H01Q 21 - Aerial arrays or systems (25,127) |
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09/13/1990 | DE3907606A1 Microwave antenna |
09/12/1990 | EP0385978A1 Method and apparatus for hyperthermia treatment |
09/11/1990 | CA1274015A1 Cylindrical omnidirectional antenna |
09/05/1990 | CN2061737U Rotary controllable broad-band combination tv antenna |
08/29/1990 | EP0384780A2 Planar microwave antenna |
08/29/1990 | EP0384777A2 Antenna element |
08/29/1990 | CN2061335U Omnidirectional full frequency channel television receiving antenna |
08/29/1990 | CN2061334U 混合放大远程电视接收天线 Hybrid amplification remote TV antenna |
08/28/1990 | US4952894 Waveguide feed network for antenna array |
08/22/1990 | EP0383597A2 Planar antenna |
08/21/1990 | US4951060 Dual frequency transmit-receive module for an active aperture radar system |
08/16/1990 | EP0382130A2 Small radio-controlled clock with an antenna coil |
08/15/1990 | CN2060600U Vertical narrow beam antenna for the use of scatter propagation |
08/14/1990 | US4949092 Modularized contoured beam direct radiating antenna |
08/14/1990 | US4949090 Transmit/receive module test system |
08/09/1990 | DE3902739A1 Radar antenna array |
08/08/1990 | EP0380914A2 Antenna system |
08/07/1990 | US4947182 Method of feeding electromagnetic power from an antenna element |
08/07/1990 | US4947176 Multiple-beam antenna system |
08/04/1990 | WO1990009042A1 Antenna arrays |
08/02/1990 | DE4002678A1 Kreisschlitz-arrayantenne mit abgleichteil Circular slot-array antenna with matching part |
08/02/1990 | DE4002176A1 GPS navigation arrangement for vehicle |
07/31/1990 | US4944087 Method of making a curved plastic body with circuit pattern |
07/25/1990 | EP0379434A1 Ultra-high frequency and high-temperature antenna, especially for a spacecraft |
07/25/1990 | EP0378905A1 Slot-coupled patch antenna and phased-array antenna arrangement incorporating such an antenna |
07/25/1990 | CN2059769U Amplification antenna used in both in- or out-door |
07/24/1990 | US4943811 Dual polarization electromagnetic power reception and conversion system |
07/24/1990 | US4943809 Electromagnetically coupled microstrip antennas having feeding patches capacitively coupled to feedlines |
07/19/1990 | DE3927141A1 Kreispolarisations-antennensystem Circular polarization antenna system |
07/18/1990 | EP0377999A1 Microstrip antenna-arrays |
07/18/1990 | EP0377921A1 Antenna |
07/18/1990 | EP0377858A1 Embedded surface wave antenna |
07/12/1990 | WO1990007802A1 Self-adaptive directional filtering and polarisation device for radioelectric waves |
07/11/1990 | EP0377155A1 Dual frequency radiating device |
07/04/1990 | EP0376074A2 Dual polarization microstrip array antenna |
07/03/1990 | US4939527 Distribution network for phased array antennas |
07/03/1990 | US4939523 Aircraft radar antenna |
06/30/1990 | CA2006494A1 Auto-adaptive direction and polarization filtering device for radio waves received by an antenna array coupled to a receiver |
06/28/1990 | WO1990007201A1 Improved feed waveguide for an array antenna |
06/28/1990 | WO1990007200A1 Ultralight microwave antenna and method of fabrication |
06/27/1990 | EP0375415A2 Plane slot antennas and their use in motor vehicles |
06/26/1990 | US4937585 Microwave circuit module, such as an antenna, and method of making same |
06/20/1990 | EP0374008A1 Over the whole spherical space electronically scanning antenna with random and reduced three-dimensional distribution of the antenna elements |
06/19/1990 | CA2003468A1 Ultralight microwave antenna and method of fabrication |
06/19/1990 | CA1270550A1 Wave guide element for an electrically controlled radar antenna |
06/13/1990 | EP0372451A1 Multifrequency radiating device |
06/12/1990 | US4933682 Point to point microwave communication service antenna pattern with anull in an interering direction |
06/12/1990 | US4933680 Microstrip antenna system with multiple frequency elements |
06/12/1990 | US4933679 Antenna |
06/05/1990 | US4931808 Embedded surface wave antenna |
06/05/1990 | US4931799 Short-range radar transceiver employing a FET oscillator |
05/31/1990 | DE3839945A1 Phased antenna array |
05/29/1990 | US4929959 Dual-polarized printed circuit antenna having its elements capacitively coupled to feedlines |
05/22/1990 | US4926868 Method and apparatus for cardiac hemodynamic monitor |
05/17/1990 | WO1990005390A1 Improved extendable antenna for portable cellular telephones |
05/16/1990 | EP0368121A1 Electronically scanned antenna |
05/15/1990 | US4926189 High-gain single- and dual-polarized antennas employing gridded printed-circuit elements |
05/09/1990 | EP0367609A2 Improved extendable antenna for portable cellular telephones |
05/08/1990 | US4924234 Plural level beam-forming network |
05/03/1990 | WO1990004862A1 Array antenna and a feeder device therefor |
05/03/1990 | DE3837148A1 Omnidirectional antenna arrangement for time signal receivers |
05/01/1990 | US4922263 Plate antenna with double crossed polarizations |
05/01/1990 | US4922261 Aerial systems |
05/01/1990 | US4922259 Microstrip patch antenna with omni-directional radiation pattern |
04/24/1990 | US4920450 Temperature dependent capacitor |
04/19/1990 | WO1990004319A1 Curved plastic body with circuit pattern and method of making |
04/18/1990 | EP0363841A2 Plural layer coupling system |
04/17/1990 | US4918458 Secondary radar transponder |
04/17/1990 | US4918457 Antenna formed of strip transmission lines with non-conductive coupling |
04/12/1990 | DE3926187A1 Schlitzstrahler Slot radiator |
04/11/1990 | CN2055991U Balcong high gain direction-changeable antenna |
04/11/1990 | CN2055990U Three band input mixing type tv receiving antenna |
04/11/1990 | CN2055989U U/v all channel indoor tv receiving antenna |
04/10/1990 | US4916458 Slotted waveguide antenna |
04/10/1990 | US4916457 Printed-circuit crossed-slot antenna |
04/05/1990 | WO1990003667A1 Automatic polarization control system for tvro receivers |
04/04/1990 | EP0362165A1 Method of feeding electromagnetic power from an antenna element |
04/04/1990 | EP0361417A2 Microstrip antenna system with multiple frequency elements |
04/04/1990 | EP0360861A1 Circularly polarized microstrip antenna array. |
04/03/1990 | US4914449 Microwave antenna structure with intergral radome and rear cover |
04/03/1990 | US4914445 Microstrip antennas and multiple radiator array antennas |
03/28/1990 | EP0360692A1 Composite duplex antenna with circular polarisation |
03/28/1990 | CN1040890A Slot array antenna |
03/27/1990 | US4912482 Antenna |
03/27/1990 | US4912481 Compact multi-frequency antenna array |
03/27/1990 | US4912480 Offset phase-center antenna for aircraft landing system |
03/21/1990 | EP0359238A2 Array antenna device having IC units with IF conversion circuits for coupling antenna elements and signal combiner |
03/14/1990 | EP0358342A1 A microwave radiometer |
03/07/1990 | EP0357233A2 Waveguide apparatus |
03/07/1990 | CN1040288A Slot array antenna |
03/06/1990 | US4907012 Antenna |
03/06/1990 | US4907008 Antenna for transmitting circularly polarized television signals |
02/28/1990 | EP0355898A1 A planar array antenna, comprising coplanar waveguide printed feed lines cooperating with apertures in a ground plane |
02/27/1990 | US4905011 Concentric ring antenna |
02/27/1990 | US4904831 Mitered mechanical switches |
02/27/1990 | CA1266325A1 Microwave antenna |
02/15/1990 | DE3926188A1 Schlitzstrahler Slot radiator |
02/08/1990 | DE3826777A1 Axial two-band antenna |
02/07/1990 | EP0354076A1 Antenna with microwave energy distribution across triplate lines |
02/06/1990 | US4899166 Self protected and transportable flat lattice antenna |