| Patents for H01Q 13 - Waveguide horns or mouths; Slot aerials; Leaky-waveguide aerials; Equivalent structures causing radiation along the transmission path of a guided wave (15,760) |
|---|
| 09/29/1991 | CA2037451A1 Patch antenna with polarization uniformity control |
| 09/26/1991 | DE4009322A1 Supply system for angle diversity operation of dish reflector antenna - has pair of horns between dish and sub-reflector defining angle between them |
| 09/25/1991 | EP0448533A1 A waveguide antenna having a plurality of broad-side slots provided with a spatial filter |
| 09/24/1991 | CA1289660C Orthogonal mode electromagnetic wave launcher |
| 09/18/1991 | EP0447218A2 Plural frequency patch antenna assembly |
| 09/17/1991 | US5049895 Flat circular waveguide device |
| 09/17/1991 | US5049893 Microwave energy distributor capable of radiating directly |
| 09/12/1991 | DE4007723A1 Field generator radiating EM energy - has two adjustable curved plates, forming capacitive plate radiator |
| 09/11/1991 | EP0445694A1 Active printed circuit antenna system having high efficiency for a scanning radar for operation in space |
| 09/11/1991 | EP0445517A2 Array antenna with slot radiators offset by inclination to eliminate grating lobes |
| 09/11/1991 | CN1054513A Ceiling mount microwave transceiver with 360 degree radiation pattern |
| 09/10/1991 | US5047783 Millimeter-wave imaging system |
| 09/05/1991 | WO1991013414A1 Ceiling mount microwave transceiver with 360 degree radiation pattern |
| 09/04/1991 | EP0444679A2 Mobile antenna |
| 09/04/1991 | EP0444357A2 Ceiling mount microwave transceiver with 360 degree radiation pattern |
| 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 |
| 08/28/1991 | EP0443526A1 A microwave coupling arrangement |
| 08/27/1991 | US5043738 Plural frequency patch antenna assembly |
| 08/27/1991 | US5043629 Slotted dielectric-lined waveguide couplers and windows |
| 08/22/1991 | WO1991012637A1 Antenna |
| 08/22/1991 | DE4004768A1 Electromagnetic radiator for localised hyperthermia treatment |
| 08/21/1991 | WO1991013415A1 Open transmission line locating system |
| 08/20/1991 | CA2010390A1 Open transmission line locating system |
| 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 |
| 08/14/1991 | EP0441204A2 Slot radiator assembly with vane tuning |
| 08/13/1991 | US5039995 Distributed antenna system |
| 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 |
| 08/08/1991 | DE3938739A1 Automobile antenna - providing circular horizontal radiation diagram and using half wavelength slits in T or L configuration |
| 08/07/1991 | EP0440126A1 Slotted waveguides antenna, in particular for space radar |
| 08/07/1991 | EP0439970A1 Slotted wave guide radiator with non-inclined slots excited by conductive printed patterns |
| 08/07/1991 | EP0439677A2 Vehicle antenna comprising a conductrice wall with a circular slot |
| 08/06/1991 | US5038152 Broad band omnidirectional monocone antenna |
| 08/01/1991 | DE4002058A1 Conical microwave range antenna - has reflector directing emission through cylinder dome for circular polar diagram |
| 07/30/1991 | US5036335 Tapered slot antenna with balun slot line and stripline feed |
| 07/30/1991 | CA2035111A1 Slotted waveguide antenna, particularly for space radars |
| 07/24/1991 | CN2081580U Tem mould speaker antenna |
| 07/11/1991 | DE4000381A1 Slot antenna for car - uses integrated slot in bodywork sealed with plastics material |
| 07/10/1991 | CN1052975A Slot antenna for variably polarized waveguide |
| 07/09/1991 | US5030965 Slot antenna having controllable polarization |
| 07/02/1991 | US5028933 Radial waveguide channel electronic scan antenna |
| 07/02/1991 | US5028891 Arrangement for supplying power to a hollow waveguide intended for electromagnetic microwaves |
| 06/26/1991 | EP0434283A2 Planar array waveguide antenna with L-shaped series/series coupling slots |
| 06/26/1991 | EP0434282A2 Dual mode antenna apparatus having slotted waveguide and broadband arrays |
| 06/20/1991 | DE3941125A1 Double-sided notch antenna for missiles and guided shells - has two fibre-reinforced teflon (RT<) plates held together by screws and having two etched tapered slots on two outside faces |
| 06/19/1991 | EP0433255A2 Orthogonally polarized dual-band printed circuit antenna employing radiating elements capacitively coupled to feedlines |
| 06/19/1991 | EP0432775A2 Switched-loop 180 degrees phase bit device with aperture shutter capabilities |
| 06/18/1991 | US5025264 Circularly polarized antenna with resonant aperture in ground plane and probe feed |
| 06/11/1991 | US5023623 Dual mode antenna apparatus having slotted waveguide and broadband arrays |
| 06/11/1991 | US5023621 For portable radio |
| 06/11/1991 | US5023594 Electromagnetic radiation |
| 06/05/1991 | EP0429754A1 Vehicle antenna |
| 06/04/1991 | US5021797 Antenna for transmitting elliptically polarized television signals |
| 05/29/1991 | CN1051828A Microwave planar array antenna |
| 05/28/1991 | US5019832 Nested-cone transformer antenna |
| 05/24/1991 | CA2004095A1 Pattern diversity in a microwave digital radio system utilizing a single horn reflector antenna |
| 05/23/1991 | DE3938443A1 Reflector antenna for two differing frequency ranges - achieves broadened characteristic in one range using horn radiator as exciter |
| 05/23/1991 | DE3938217A1 Reflector aerial for two different frequency ranges - has exciter with high secondary lobes and narrowing radiation diagram with increased frequency |
| 05/22/1991 | EP0428299A2 Slot antenna having controllable polarization |
| 05/22/1991 | EP0428026A2 Radiating coaxial cable with improved water-blocking characteristics |
| 05/21/1991 | US5017937 Wideband horn antenna |
| 05/21/1991 | US5017936 Microwave antenna |
| 05/15/1991 | EP0427479A2 Planar array antenna |
| 05/15/1991 | EP0427131A2 Directive radar antenna with electromagnetic energy compression, for telecommunications |
| 05/15/1991 | EP0426972A1 Flat antenna |
| 05/15/1991 | CA2029329A1 Radiating element excitation non-inclinated radiating slot guide |
| 05/07/1991 | US5014069 Photoconductive antenna modulator |
| 05/07/1991 | US5014022 Switched-loop/180 degree phase bit with aperture shutter capabilities |
| 04/30/1991 | US5012255 Combination antenna and windshield heater |
| 04/25/1991 | DE4003955C1 Slit waveguide signal directional coupler - provides contactless signal transmission between moving and fixed parts e.g. in suspended railway |
| 04/23/1991 | US5010351 Slot radiator assembly with vane tuning |
| 04/23/1991 | US5010349 Plane patch antenna |
| 04/23/1991 | US5010348 Device for exciting a waveguide with circular polarization from a plane antenna |
| 04/17/1991 | EP0422430A2 Coupling structure between microwaves and plasma |
| 04/10/1991 | EP0421757A2 Microwave antenna |
| 04/10/1991 | EP0421722A2 Multiple beam deployable space antenna system |
| 04/09/1991 | US5006859 Patch antenna with polarization uniformity control |
| 04/09/1991 | US5006858 Microstrip line antenna with crank-shaped elements and resonant waveguide elements |
| 04/02/1991 | US5005019 Electromagnetically coupled printed-circuit antennas having patches or slots capacitively coupled to feedlines |
| 03/26/1991 | US5003319 Microstrip antenna device for circularly polarized waves |
| 03/20/1991 | EP0417356A1 Dual frequency microwave feed assembly |
| 03/19/1991 | US5001778 Portable radio receiver |
| 03/19/1991 | US5001493 Multiband gridded focal plane array antenna |
| 03/19/1991 | US5001444 Two-frequency radiating device |
| 03/13/1991 | EP0372023A4 Multimode dielectric-loaded multi-flare antenna |
| 03/13/1991 | CN2073172U Square cavity gap antenna |
| 03/05/1991 | US4998113 Nested horn radiator assembly |
| 02/27/1991 | EP0414266A1 Stripline patch antenna with slot plate |
| 02/26/1991 | US4996535 Shortened dual-mode horn antenna |
| 02/21/1991 | DE4025766A1 Electronically controllable vehicle antenna - uses plate separated by dielectric material with permeability controlled by dc voltage |
| 02/19/1991 | US4994820 Plane antenna |
| 02/19/1991 | US4994819 Pattern diversity in a microwave digital radio system utilizing a single horn reflector antenna |
| 02/19/1991 | US4994817 Annular slot antenna |
| 02/06/1991 | CN1049071A Annular slot antenna |
| 02/05/1991 | CA1279926C Horn antenna array phase matched over large bandwidths |
| 01/30/1991 | EP0410083A1 Annular slot antenna |
| 01/30/1991 | EP0409941A1 Ultralight microwave antenna and method of fabrication |