Patents
Patents for H01Q 11 - Electrically-long aerials having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements (4,834)
11/1993
11/18/1993EP0569390A1 Antenna system.
11/11/1993WO1993022804A1 Steerable beam helix antenna
11/02/1993US5258771 Interleaved helix arrays
10/1993
10/19/1993US5255005 Dual layer resonant quadrifilar helix antenna
10/06/1993EP0564266A2 Circular polarization apparatus for micro wave antenna
10/05/1993CA1322786C Mobile communications antenna
09/1993
09/29/1993EP0531312A4 Antenna structure and method of making same
08/1993
08/10/1993US5235342 Antenna array with system for locating and adjusting phase centers of elements of the antenna array
08/04/1993EP0553707A1 Circulary-polarized-wave flat antenna
08/04/1993EP0553094A1 Device for information transmission.
08/03/1993US5233362 Maypole antenna
07/1993
07/14/1993EP0550660A1 Personal positioning satellite navigator with printed quadrifilar helical antenna
06/1993
06/10/1993WO1993011582A1 Compact broadband microstrip antenna
06/01/1993US5216436 Collapsible, low visibility, broadband tapered helix monopole antenna
05/1993
05/25/1993US5214439 Drum-deployable multibay antenna
05/18/1993US5212494 Compact multi-polarized broadband antenna
04/1993
04/13/1993US5202696 End fed half wave dipole antenna
04/01/1993WO1993006631A1 Adjustable helical antenna for a vhf radio
03/1993
03/30/1993US5198831 Personal positioning satellite navigator with printed quadrifilar helical antenna
03/23/1993US5196858 Deployable S-shaped antenna element
03/17/1993EP0531312A1 Antenna structure and method of making same
03/02/1993US5191352 Radio frequency apparatus
03/02/1993US5191351 Folded broadband antenna with a symmetrical pattern
02/1993
02/24/1993EP0528175A1 Antenna receiving apparatus
02/21/1993CA2074571A1 Antenna receiving apparatus
02/16/1993US5187488 Tunable high-frequency antenna
01/1993
01/14/1993DE4121060A1 Transversely radiating coil aerial - has extra conductor starting at coil beginning and extending at opposite direction to coil
01/07/1993EP0521511A2 Back fire helical antenna
12/1992
12/08/1992US5170176 Quadrifilar helix antenna
11/1992
11/26/1992WO1992021159A1 Radiowave antenna system
11/17/1992US5164738 Wideband dual-polarized multi-mode antenna
09/1992
09/09/1992CN2115588U Log periodic antenna
09/08/1992US5146235 Helical uhf transmitting and/or receiving antenna
09/02/1992CN1064177A 天线系统 Antenna System
08/1992
08/25/1992US5142292 Coplanar multiple loop antenna for electronic article surveillance systems
08/18/1992US5140336 Non-resonant antenna for wind profilers
08/11/1992US5138331 Broadband quadrifilar phased array helix
08/06/1992WO1992013373A1 Antenna system
07/1992
07/28/1992US5134422 Helical type antenna and manufacturing method thereof
05/1992
05/05/1992US5111213 Broadband antenna
05/05/1992US5111211 Broadband patch antenna
04/1992
04/29/1992EP0482756A2 Wideband dual polarized multi-mode antenna
04/15/1992CN1016300B 天线 Antenna
04/14/1992US5105201 Glass mounted antenna for car radio
04/02/1992WO1992005602A1 Personal positioning satellite navigator with printed quadrifilar helical antenna
03/1992
03/25/1992CN1059805A Micro antenna
03/18/1992EP0386134A4 Antenna system for magnetic and resonant circuit detection
03/03/1992US5093670 Logarithmic periodic antenna
02/1992
02/25/1992CA1296421C Log-periodic slot antenna
02/05/1992EP0469741A1 Radio frequency apparatus
01/1992
01/25/1992WO1992001953A1 Device for information transmission
01/25/1992CA2087980A1 Device for information transmission
01/18/1992CA2047113A1 Logarithmic periodic antenna
01/15/1992EP0465658A1 Four-wire fractional winding helical antenna and manufacturing method thereof
01/14/1992US5081469 Enhanced bandwidth helical antenna
01/07/1992CA1294002C Transmitter having pll circuit
10/1991
10/29/1991CA1291560C Helicoidal antenna and method for fabricating said antenna
10/17/1991WO1991015621A1 Antenna structure and method of making same
10/16/1991EP0301056B1 Microwave transformer
10/15/1991US5057850 Foreshortened log-periodic dipole antenna
08/1991
08/20/1991US5041842 Helical base station antenna with support
07/1991
07/09/1991WO1991011038A1 Four-wire fractional winding helical antenna and manufacturing method thereof
07/03/1991EP0434866A1 Dual mode log periodic dipole antenna
06/1991
06/20/1991CA2032334A1 Broad-band quadrifilar helical antenna and the like and feed network therefor
05/1991
05/22/1991EP0428229A1 tunable high-frequency antenna
05/15/1991EP0427654A1 Tuned helical antennae consisting of two quadrifilar antennas fit into each other
05/11/1991CA2029290A1 Dual layer resonant quadrifilar helix antenna
05/08/1991EP0426566A1 Multifocal receiving antenna with one single pointing direction for reception from several satellites
05/01/1991WO1991006988A1 Multifocal receiving antenna with a single plotting direction for several satellites
05/01/1991CA2044586A1 Antenne de reception multifocale a direction de pointage unique pour plusieurs satellites
04/1991
04/23/1991CA1283464C Microwave transformer
04/09/1991US5006861 Antenna
04/09/1991US5006860 Connection of T sections between half rings within annular housing
03/1991
03/06/1991EP0415574A2 Antenna array
03/01/1991CA2023442A1 Antenna array
01/1991
01/01/1991US4982197 Dual mode log periodic dipole antenna
12/1990
12/11/1990US4977408 Deployable antenna bay
11/1990
11/13/1990CA1276289C Log - periodic hf antenna system
10/1990
10/24/1990EP0393875A1 A compact multi-polarized broadband antenna
09/1990
09/12/1990EP0386134A1 Antenna system for magnetic and resonant circuit detection.
07/1990
07/31/1990US4945363 Conical spiral antenna
07/19/1990DE3927141A1 Kreispolarisations-antennensystem Circular polarization antenna system
06/1990
06/19/1990US4935747 Axial mode helical antenna
05/1990
05/01/1990US4922262 Log-periodic slot antennas
05/01/1990US4922180 Controlled microwave sample irradiation system
03/1990
03/06/1990US4907011 Foreshortened dipole antenna with triangular radiating elements and tapered coaxial feedline
02/1990
02/06/1990US4899165 Variable circular polarization antenna having parasitic Z-shaped dipole
12/1989
12/28/1989WO1989012916A1 Antenna system for magnetic and resonant circuit detection
12/27/1989EP0348054A2 Mobile communications antenna
12/05/1989CA1263705A1 Rf antenna for transmission line sensor
10/1989
10/03/1989US4872022 Support and connection means for looped antenna conductors
10/03/1989US4872021 Collinear dipole array with inductive and capacitive phasing
09/1989
09/06/1989CN2044103U All direction antenna loaded on vehicle with superwide-band and low outline
08/1989
08/29/1989US4862189 Microwave transformer
08/15/1989US4857939 Mobile communications antenna
07/1989
07/18/1989US4849767 Helical antenna for small portable wireless devices
07/18/1989CA1257694A1 Antenna system
07/11/1989US4847627 Compact wave antenna system
06/1989
06/27/1989CA1256557A1 Sandwich-wire antenna
06/14/1989EP0320404A1 Helix-type antenna and its manufacturing process
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