Patents
Patents for H01Q 21 - Aerial arrays or systems (25,127)
02/1990
02/06/1990US4899164 Slot coupled microstrip constrained lens
02/06/1990US4899163 Microwave plate antenna in particular for Doppler radar
02/06/1990US4899162 Omnidirectional cylindrical antenna
02/06/1990US4899160 Guidance equipment for microwave landing system
01/1990
01/24/1990EP0352160A1 Omnidirectional antenna, particularly for the transmission of radio or television signals in the decimetric-wave range, and radiation system formed by an arrangement of these antennas
01/17/1990CN2051402U Multidirectional tv aerial
01/16/1990US4894661 Fish school detecting method or apparatus
01/16/1990US4894114 Process for producing vias in semiconductor
01/10/1990EP0350006A2 Antenna structure used in portable radio device
01/10/1990CN2051017U Compound vibrator tv antenna
01/09/1990US4893129 Planar array antenna
01/09/1990CA1264373A1 Flat wide - band antenna
01/04/1990DE3822081A1 Receiving antenna for ultrashort waves
01/03/1990EP0349069A1 Dual polarised phased array antenna
01/03/1990CN2050659U All frequency band tv antenna
01/03/1990CN1038548A Ultrashort-wave multifrequency antenna for telecontrol and telemetry
12/1989
12/28/1989DE3821529A1 Medium-waveband transmitting antenna
12/28/1989DE3821215A1 Speed/distance travel sensor for motor vehicle arrangements
12/27/1989EP0348370A2 Low noise block down-converter for direct broadcast satellite receiver integrated with a flat plate antenna
12/27/1989EP0348054A2 Mobile communications antenna
12/20/1989CN2049824U Full frequency channel active aerial for receiving tv
12/19/1989US4888597 Millimeter and submillimeter wave antenna structure
12/13/1989EP0346125A2 Microwave integrated apparatus for satellite broadcasting receiver
12/13/1989EP0345454A1 Microstrip array antenna
12/12/1989US4887090 Vehicle antenna with shiftable gain patterns
12/07/1989DE3917138A1 Ebene antenne Antenna plane
12/05/1989US4885589 Optical distribution of transmitter signals and antenna returns in a phased array radar system
11/1989
11/30/1989WO1989011311A1 Microwave balloon angioplasty
11/29/1989EP0343322A2 Notch antenna with microstrip feed
11/23/1989DE3728110A1 Antenna array
11/21/1989CA1263181A1 Electromagnetically coupled microstrip antennas having feeding patches capacitively coupled to feedlines
11/16/1989DE3815709A1 Im zeitbereich arbeitendes radarsystem In the time-domain working radar system
11/15/1989EP0342175A2 Dual-polarized printed circuit antenna having its elements, including gridded printed circuit elements, capacitively coupled to feedlines
11/15/1989CN2047845U All-channel television antenna
11/14/1989US4881082 Antenna beam boundary detector for preliminary handoff determination
11/09/1989DE3814382A1 Dual-frequency antenna
11/08/1989EP0340429A1 Electronically scanned antenna
11/08/1989EP0340404A2 Monopole/L-shaped parasitic elements for circularly/eliptically polazized wave transceiving
11/08/1989CN2047455U Thin film type indoor television antenna
11/07/1989US4879570 Broadcasting wave reception antenna
11/07/1989US4879563 Circularly polarized complementary antenna with patch and dipole elements
10/1989
10/31/1989US4878062 Global position satellite antenna
10/31/1989US4878060 Microwave plane antenna with suspended substrate system of lines and method for manufacturing a component
10/31/1989CA1262574A1 Microstrip antenna compressed feed
10/31/1989CA1262573A1 Microstrip antenna bulk load
10/31/1989CA1262572A1 Satellite receiver
10/31/1989CA1262562A1 Portable radio
10/18/1989CN2046280U Small-size domestic logarithmic cycle period all frequency band antenna
10/11/1989EP0335942A1 Microwave radiometer
10/10/1989US4873528 Device for energizing a non-eccentric in the wide side of a waveguide, and a slotted antenna comprising such a device
10/05/1989WO1989009501A1 Flat plate array antenna
10/03/1989US4872021 Collinear dipole array with inductive and capacitive phasing
10/03/1989US4872020 Slot antenna in circular waveguide
09/1989
09/26/1989US4870426 Dual band antenna element
09/26/1989US4870423 Method and device for focusing, on one point to be examined, the antennae of an antenna array
09/26/1989CA1261060A1 Planar antenna with patch radiators
09/26/1989CA1260610A1 Antenna network on printed circuit
09/21/1989WO1989008933A1 Circularly polarized microstrip antenna array
09/19/1989US4868576 Extendable antenna for portable cellular telephones with ground radiator
09/19/1989CA1259662A1 Shf receiver
09/12/1989US4866451 Broadband circular polarization arrangement for microstrip array antenna
09/12/1989CA1259401A1 Composite waveguide coupling aperture having a thickness dimension
09/06/1989EP0330699A1 Microwave circuit module, such as an antenna, and method of making same
09/05/1989USH680 TDD antenna--foil formed, substrate loaded laser welded assembly
09/05/1989US4864320 Monopole/L-shaped parasitic elements for circularly/elliptically polarized wave transceiving
09/05/1989US4864319 Radio frequency antenna with small cross-section
09/05/1989US4864309 Microwave radiometer
08/1989
08/30/1989CN1035208A Bilateral, wide angle receiving and high gain all channel antenna
08/29/1989US4862186 Microwave antenna array waveguide assembly
08/24/1989WO1989007838A1 Microstrip antenna
08/23/1989EP0329079A2 Slotted waveguide Antenna
08/16/1989EP0327965A2 Multi-frequency antenna for satellite communications
08/16/1989CN2043009U Uhf/vhf all channel tv receiving antenna
08/16/1989CN2043008U Indoor tv receiving antenna
08/15/1989US4857939 Mobile communications antenna
08/15/1989US4857938 Planar antenna
08/10/1989WO1989007348A1 Radio antennas
08/09/1989CN1034647A 分布天线系统 Distributed antenna system
08/03/1989DE3802130A1 Antenna system for broadcast radio reception in motor vehicles
08/02/1989EP0325701A1 Antenna structure
08/01/1989US4853704 Notch antenna with microstrip feed
08/01/1989US4853703 Microstrip antenna with stripline and amplifier
08/01/1989US4853702 Radio wave receiving system
07/1989
07/26/1989EP0325034A2 Antenna Array
07/25/1989US4851857 High-power, end-fed, non-coaxial UHF-TV broadcast antenna
07/25/1989US4851855 Planar antenna
07/19/1989CN1034096A 微波天线的结构 Microwave antenna structure
07/18/1989CA1257693A1 Antenna polarization control device and method for implementing said device
07/12/1989CN2041071U All-channel television omnidirectional plane receiving antenna
06/1989
06/28/1989EP0322109A2 Distributed antenna system
06/27/1989US4843403 Broadband notch antenna
06/27/1989US4843402 Azimuth array of rotory antennas with selectable lobe patterns
06/27/1989US4843400 Aperture coupled circular polarization antenna
06/27/1989CA1256555A1 Modularized contoured beam phased array antenna
06/21/1989EP0320827A2 Dipole curtain antenna for radiating microwaves
06/21/1989EP0320675A2 Compact dual series waveguide feed
06/20/1989US4841308 Slotted waveguide antenna assembly
06/15/1989WO1989005530A1 Antenna structure for providing a uniform field
06/14/1989EP0319753A1 Exciting or feeding system for a parabolic antenna
06/13/1989US4839663 Dual polarized slot-dipole radiating element