| 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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| 02/26/1992 | CN2097447U Moveable telescopic aerial for tv |
| 02/25/1992 | US5091731 Electromagnetic radiation sensors |
| 02/25/1992 | US5091708 Transmission line transformer |
| 02/23/1992 | CA2049615A1 Radio relay system, cordless telephone system, base station device, and radio system |
| 02/19/1992 | CN2096820U Claw telescopic antenna for tv. set |
| 02/18/1992 | US5089827 Receiving antenna for a motor vehicle |
| 02/11/1992 | CA1295732C Multifrequency antenna, particularly for space telecommunications |
| 02/06/1992 | WO1992001952A1 Device for positioning a first object relative to a second object |
| 02/05/1992 | EP0469779A2 A matching device for a microstrip antenna |
| 02/05/1992 | EP0469741A1 Radio frequency apparatus |
| 02/05/1992 | EP0469670A2 Transmission line transformer |
| 02/03/1992 | CA2041827A1 Electronic article surveillance tag and method for implementing same |
| 01/25/1992 | WO1992001953A1 Device for information transmission |
| 01/25/1992 | CA2087980A1 Device for information transmission |
| 01/22/1992 | CN2094124U Bi-directional plane tv aerial |
| 01/16/1992 | DE4022072A1 Micro-stripline UHF reflector-antenna - includes two mutually parallel plates with dielectric layer between antenna and ground sides |
| 01/09/1992 | DE4120652A1 Transmit or receiver aerial covering VHF, UHF and SHF ranges - has long tube section with surface slot pattern and enclosed by metal plates |
| 01/08/1992 | EP0464255A1 Multiband antenna |
| 01/08/1992 | CN2092819U Fixing device of indoor telescopic antenna of tv. set |
| 01/08/1992 | CN2092818U Antenna converted into 8 shape for 1-57 frequency channels of tv. set |
| 01/07/1992 | US5079562 Multiband antenna |
| 12/24/1991 | US5075691 Multi-resonant laminar antenna |
| 12/24/1991 | CA1293563C Electromagnetically coupled printed-circuit antennas having patches or slots capacitively coupled to feedlines |
| 12/18/1991 | CN2091032U Auto-lift and fall controller for full-automatic car telescopic aerial |
| 12/11/1991 | EP0407459A4 The gap radiated antenna |
| 12/11/1991 | CN2090585U Improved fish-bone type antenna |
| 12/11/1991 | CN2090582U 伸缩天线杆 Telescopic mast |
| 12/10/1991 | US5072232 End-fed rod antenna |
| 12/10/1991 | US5070786 Standoff sensor antennae for munitions having explosively formed penetrators |
| 12/04/1991 | EP0459391A2 Antenna for portable radio equipment |
| 12/02/1991 | WO1991019331A1 Omni-directional antenna array |
| 12/02/1991 | CA2083706A1 Omni-directional antenna array |
| 11/26/1991 | US5068672 Balanced antenna feed system |
| 11/20/1991 | CN1056381A Omnidirectional communications mast-mounted monopole antenna |
| 11/12/1991 | US5065164 Frequency range enchanced monopole antenna |
| 11/05/1991 | US5063363 Electromagnetic energy radiation pick-up |
| 10/30/1991 | CN2087821U Retrofitted fish-bone shaped logarithmic receiving antenna |
| 10/29/1991 | US5061942 Rod-shaped transceiver antenna especially for 450-470 mhz band |
| 10/29/1991 | US5061939 Flat-plate antenna for use in mobile communications |
| 10/29/1991 | US5061938 Microstrip antenna |
| 10/21/1991 | WO1991017585A1 Microstrip radiator for circular polarization free of welds and floating potentials |
| 10/15/1991 | CA1290847C Vehicle antenna with shiftable gain patterns |
| 10/10/1991 | DE4011344A1 Antenna for use as divining rod or for scientific investigation - has separate conductors in resonator circuit dimensioned to match transmission chamber characteristic impedance |
| 10/09/1991 | EP0450881A2 Microstrip antennas |
| 10/09/1991 | CN2086463U Full-channel phase change tv antenna in room |
| 10/08/1991 | US5055852 Diplexing radiating element |
| 10/02/1991 | EP0449492A1 Patch antenna with polarization uniformity control |
| 10/01/1991 | US5053786 Broadband directional antenna |
| 09/29/1991 | CA2037451A1 Patch antenna with polarization uniformity control |
| 09/19/1991 | DE4008505A1 Mobile antenna for satellite communication system - uses etching process on substrate with two part assembly |
| 09/18/1991 | CN2085098U Pagoda type spiral transmitter-receiver antenna |
| 09/12/1991 | DE4007587A1 Local hyperthermia developer for human body |
| 09/12/1991 | DE4007562A1 Local hyperthermia applicator for human tumour treatment |
| 09/11/1991 | CN2084664U 自动伸缩天线 Automatic retractable antenna |
| 09/11/1991 | CN2084663U Full channel tv receiving antenna |
| 09/11/1991 | CN1054513A Ceiling mount microwave transceiver with 360 degree radiation pattern |
| 09/05/1991 | WO1991013414A1 Ceiling mount microwave transceiver with 360 degree radiation pattern |
| 09/05/1991 | DE4106250A1 Polarisation independent dipole aerial array - has number of identical aerial units symmetrically arranged in two dimensional array each unit with dipole element |
| 09/04/1991 | EP0444679A2 Mobile antenna |
| 09/04/1991 | EP0444357A2 Ceiling mount microwave transceiver with 360 degree radiation pattern |
| 09/04/1991 | CN2084234U Special aerial for intercom capable of precision tuning |
| 09/03/1991 | WO1991013370A1 Time domain radio transmission system |
| 09/03/1991 | US5046132 Open field test site reference antenna with integral battery powered signal generator |
| 09/03/1991 | US5045862 Dual polarization microstrip array antenna |
| 09/03/1991 | CA1288510C Circular microstrip vehicular rf antenna |
| 09/02/1991 | CA2033488A1 Ceiling mount microwave transceiver with 360 degree radiation pattern |
| 08/22/1991 | WO1991012637A1 Antenna |
| 08/22/1991 | DE4004768A1 Electromagnetic radiator for localised hyperthermia treatment |
| 08/21/1991 | EP0441954A1 Graphite composite structures exhibiting electrical conductivity |
| 08/20/1991 | US5065166 Anti cancellation antenna |
| 08/20/1991 | US5041839 Electromagnetic radiation sensors |
| 08/20/1991 | CA1287917C Three resonator parasitically coupled microstrip antenna array element |
| 08/20/1991 | CA1287916C Near-isotropic low-profile microstrip radiator especially suited for use as a mobile vehicle antenna |
| 08/13/1991 | US5039994 Dipole arrays |
| 08/13/1991 | US5039992 High temperature skin antenna |
| 08/08/1991 | DE4002899A1 Roof incorporated vehicle aerial - has coaxial cable passing through base of cup-shaped element below ring shaped gap in roof |
| 08/07/1991 | EP0439677A2 Vehicle antenna comprising a conductrice wall with a circular slot |
| 08/07/1991 | CN2082465U Unidirectional balcony type tv receiving autenna with double-deck |
| 08/07/1991 | CN2082463U High-gain outdoor tv receiving antenna and its over-all structure |
| 08/07/1991 | CN1053713A Electromechanically-integrated program extendible omnibearing wide-band antenna |
| 07/30/1991 | US5036336 System for the integration of I.F.F. sum and difference channels in a radar surveillance antenna |
| 07/24/1991 | EP0271517B1 Array antenna |
| 07/18/1991 | DE4000763A1 Printed circuit group antenna - used circular symmetrical array on dielectric substrate to reduce cross polarisation economically |
| 07/09/1991 | US5030963 Signal receiver |
| 07/09/1991 | US5030962 Electromagnetic radiation sensor |
| 07/09/1991 | US5030940 Electronic article surveillance tag and method for implementing same |
| 07/03/1991 | EP0434866A1 Dual mode log periodic dipole antenna |
| 07/03/1991 | CN2080236U Pull-rod socket |
| 06/26/1991 | EP0434268A2 Microstrip antenna |
| 06/18/1991 | US5025263 Multi-frequency antenna |
| 06/18/1991 | CA1285049C Single chip transponder device |
| 06/12/1991 | EP0431764A2 Antenna with curved dipole elements |
| 06/12/1991 | CN2078929U Indoor receiving aerial of tv set |
| 06/11/1991 | US5023621 For portable radio |
| 06/11/1991 | US5023594 Electromagnetic radiation |
| 06/05/1991 | EP0430745A1 Circular polarized antenna, particularly for array antenna |
| 06/05/1991 | CN2078494U Outdoor antenna for t.v. set |
| 06/04/1991 | US5021800 Two terminal antenna for adaptive arrays |
| 06/04/1991 | US5021799 High permitivity dielectric microstrip dipole antenna |
| 06/04/1991 | US5021795 Passive temperature compensation scheme for microstrip antennas |