| Patents for H01Q 9 - Electrically-short aerials having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements (23,053) |
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| 05/29/1991 | EP0429255A2 Three-wave shared antenna (radio, AM and FM) for automobile |
| 05/28/1991 | US5020136 Battery pack antenna suitable for use with two-way portable transceivers |
| 05/28/1991 | US5019830 Amplified FM antenna with parallel radiator and ground plane |
| 05/28/1991 | US5019829 Plug-in package for microwave integrated circuit having cover-mounted antenna |
| 05/25/1991 | CA2029378A1 Circular polarization antenna, particularly for an antenna network |
| 05/22/1991 | EP0428229A1 tunable high-frequency antenna |
| 05/21/1991 | US5017938 UHF-TV broadcast system having circular, non-coaxial waveguide transmission line for operation in the TE11 mode |
| 05/21/1991 | US5017932 Miniature antenna |
| 05/15/1991 | EP0426972A1 Flat antenna |
| 05/14/1991 | WO1991007785A1 End fed flat antenna |
| 05/14/1991 | US5016022 Monopole inductively loaded antenna tuning system |
| 05/14/1991 | US5016021 12 and 17 meter adapter assemblies |
| 05/08/1991 | CN2076716U Electronic frequency-dividing type high definition all channel aerial |
| 05/08/1991 | CN1012605B Balanced low profile hybrid antenna |
| 04/30/1991 | US5012256 Array antenna |
| 04/23/1991 | US5010349 Plane patch antenna |
| 04/18/1991 | WO1991005374A1 Monopole antenna |
| 04/10/1991 | EP0421647A2 Transmitters and transmitter circuits |
| 04/10/1991 | EP0421646A2 Transmitters and receivers with antennas |
| 04/09/1991 | US5006860 Connection of T sections between half rings within annular housing |
| 04/09/1991 | US5006859 Patch antenna with polarization uniformity control |
| 04/09/1991 | US5006857 Planar microstrip |
| 04/02/1991 | US5005019 Electromagnetically coupled printed-circuit antennas having patches or slots capacitively coupled to feedlines |
| 03/31/1991 | CA2026368A1 Transmitters and receivers with antennas |
| 03/31/1991 | CA2026341A1 Transmitters and transmitter circuits |
| 03/27/1991 | CN2074060U High-gain omnidirectional antenna for ultra-high frequency band |
| 03/26/1991 | US5003319 Microstrip antenna device for circularly polarized waves |
| 03/26/1991 | US5003318 Dual frequency microstrip patch antenna with capacitively coupled feed pins |
| 03/20/1991 | EP0409867A4 Balanced low profile hybrid antenna |
| 03/19/1991 | US5001778 Portable radio receiver |
| 03/19/1991 | CA1281777C Detachable battery pack with a built-in broadband antenna |
| 03/13/1991 | EP0416300A2 Dual polarized spiral antenna |
| 03/06/1991 | EP0415803A1 Receiving antenna for a motor vehicle |
| 03/01/1991 | WO1991003847A1 Graphite composite structures exhibiting electrical conductivity |
| 03/01/1991 | CA2036373A1 Graphite composite structures exhibiting electrical conductivity |
| 02/21/1991 | WO1991002386A1 Transmitting and receiving arrangement for portable appliances |
| 02/21/1991 | DE4025766A1 Electronically controllable vehicle antenna - uses plate separated by dielectric material with permeability controlled by dc voltage |
| 02/20/1991 | EP0413139A2 Tubular antenna mounting-bracket |
| 02/19/1991 | US4994820 Plane antenna |
| 02/06/1991 | EP0411363A2 Double skirt omnidirectional dipole antenna |
| 02/05/1991 | US4990927 Microstrip antenna |
| 01/30/1991 | EP0409867A1 Balanced low profile hybrid antenna. |
| 01/29/1991 | CA1279716C Passive transponder |
| 01/25/1991 | WO1991001577A1 Multi-resonant laminar antenna |
| 01/22/1991 | US4987424 Film antenna apparatus |
| 01/22/1991 | US4987423 Wide band loop antenna with disymmetrical feeding, notably antenna for transmission, and array antenna formed by several such antennas |
| 01/22/1991 | US4987421 Microstrip antenna |
| 01/16/1991 | EP0408408A1 Collector of electromagnetic radiation |
| 01/16/1991 | EP0407459A1 The gap radiated antenna |
| 01/09/1991 | EP0407145A1 Broad band mobile telephone antenna |
| 01/09/1991 | EP0406564A2 Rod antenna for two frequency ranges |
| 01/09/1991 | CN2069173U Spiral telescopic antenna for hand transceiver |
| 01/01/1991 | US4982197 Dual mode log periodic dipole antenna |
| 12/27/1990 | EP0403910A1 Radiating, diplexing element |
| 12/27/1990 | EP0403741A2 Whip antenna |
| 12/25/1990 | US4980693 Focal plane array antenna |
| 12/20/1990 | CA2019181A1 Diplexing radiating element |
| 12/18/1990 | US4979186 Time domain radio transmission system |
| 12/13/1990 | WO1990015452A1 Antenna with bends |
| 12/12/1990 | EP0402005A2 Flush mount antenna |
| 12/05/1990 | EP0400872A1 A flat-plate antenna for use in mobile communications |
| 12/05/1990 | CN2067035U 电子强波天线 Strong electron wave antenna |
| 12/04/1990 | US4975713 Mobile mesh antenna |
| 12/04/1990 | CA1277417C Transponder antenna |
| 11/28/1990 | EP0399525A1 Skin antenna for high temperatures |
| 11/28/1990 | EP0398927A1 Radio antennas. |
| 11/26/1990 | CA2014293A1 Efficiency monitoring antenna |
| 11/24/1990 | CA2017359A1 High temperature skin antenna |
| 11/20/1990 | US4972196 Broadband, unidirectional patch antenna |
| 11/13/1990 | US4970524 Broadband transmission line coupled antenna |
| 11/07/1990 | CN2065365U Small-size universal tv receiving aerial |
| 11/06/1990 | US4968984 Antenna unit for a vehicle |
| 11/01/1990 | WO1990013152A1 Duplexing antenna for portable radio transceiver |
| 10/31/1990 | EP0394960A1 A microstrip antenna |
| 10/25/1990 | WO1990013049A1 Short-range radar transceiver employing a fet oscillator |
| 10/24/1990 | EP0393875A1 A compact multi-polarized broadband antenna |
| 10/18/1990 | DE3910877A1 Doppler direction-finding antenna |
| 10/18/1990 | CA2014629A1 Duplexing antenna for portable radio transceiver |
| 10/17/1990 | EP0392720A2 A whip antenna and a method for manufacturing the same |
| 10/17/1990 | CN2064109U Automatic lifting antenna of car transmitter-receiver |
| 10/17/1990 | CN2064108U Single spiral tv antenna |
| 10/16/1990 | US4963879 Double skirt omnidirectional dipole antenna |
| 10/09/1990 | US4962383 Low profile array antenna system with independent multibeam control |
| 10/03/1990 | EP0389705A2 Non-stationary antenna |
| 10/03/1990 | CA2013424A1 Microwave electric power receiver |
| 09/20/1990 | WO1990010980A1 Time domain radio transmission system |
| 09/20/1990 | DE3908893A1 Ring radiating element using printed circuit technology |
| 09/19/1990 | EP0387445A2 Monopole antenna |
| 09/19/1990 | CN2062503U Pull rod antenna for tv set |
| 09/18/1990 | US4958167 Ultra-broadband impedance matched electrically small complementary signal radiating structures using thin wire elements and an impedance optimizing feed circuit |
| 09/18/1990 | US4958164 Low profile, broad band monopole antenna |
| 09/18/1990 | US4958163 Means for tuning an antenna |
| 09/18/1990 | US4958162 Near isotropic circularly polarized antenna |
| 09/16/1990 | CA2010950A1 Omnidirectional communications mast-mounted monopole antenna |
| 09/12/1990 | EP0386255A1 Active antenna |
| 08/28/1990 | CA1273429A1 Broadbanded microstrip antenna having series- broadbanding capacitance integral with feedline connection |
| 08/22/1990 | EP0383292A2 Electronic circuit device |
| 08/07/1990 | US4947178 Scanning antenna |
| 07/25/1990 | EP0378905A1 Slot-coupled patch antenna and phased-array antenna arrangement incorporating such an antenna |
| 07/24/1990 | US4943809 Electromagnetically coupled microstrip antennas having feeding patches capacitively coupled to feedlines |