Abstract:
One or more anisotropic lenses, where the permittivity and/or permeability is directional, are used to vary one or more of beamwidth, beam direction, polarization, and other parameters for one or more antennas. Contemplated anisotropic lenses can include conductive or dielectric fibers or other particles. Lenses can be spherical, cylindrical or have other shapes depending on application, and can be rotated and/or positioned. Important applications include land and satellite communication, base station antennas.
Abstract:
Disclosed is an antenna including a lens; a feed trolley configured to couple to a feed; a track coupled to the feed trolley; a flexible member connected to the feed trolley configured to move the feed coupled to the feed trolley along the track to a first destination or to a second destination, wherein the feed is configured to move along the track to the first destination to form a first collimated beam through the lens to point to a first satellite, and wherein the feed is configured to move along the track to the second destination to form a second collimated beam through the lens to point to a second satellite. In various examples, the antenna includes a second feed trolley and a second feed, and the track includes two sides to accommodate a feed trolley on each side.
Abstract:
L'invention concerne un système de déflexion (1) configurable d'un faisceau hyperfréquence incident (Fine) présentant une longueur d'onde comprise dans une plage de longueurs d'onde correspondant aux hyperfréquences comprenant : -un premier (C1) et un deuxième (C2) composant diélectrique diffractif aptes à effectuer chacun une rotation autour d'un axe de rotation Z, -ledit système de déflexion (1) étant apte à générer un faisceau hyperfréquence (F) par diffraction dudit faisceau hyperfréquence incident (Fine) sur lesdits premier et deuxième composants (C1, C2), ledit faisceau hyperfréquence (F) étant orienté selon un angle fonction du positionnement angulaire entre ledit premier (C1) et ledit deuxième (C2) composants diffractifs, -lesdits premier et deuxième composant (C1,C2) présentant respectivement une première et deuxième structure périodique de première et deuxième période (P1, P2) selon un premier et deuxième axe (X1,X2), lesdites première et deuxième structures comprenant respectivement une pluralité de premières et deuxièmes microstructures primaires (MS1p, MS2p) formées respectivement sur un premier et un deuxième substrat (S1,S2) de premier indice et deuxième indice de réfraction substrat.
Abstract:
An antenna comprising a radiator that has a radiating portion (1) for allowing radiation to be transmitted and/or received and a non-radiating portion (2,3,4) for preventing radiation transmission and/or reception, and means for changing the position and/or shape of the radiating portion (1).
Abstract:
A lens antenna device for mobile communications has an antenna having a spherical Luneberg lens or a hemispherical Luneberg lens with a reflector and further having a primary emitter and a support arm for the emitter, a cover for covering the antenna, a level-adjusting mechanism with an antenna-leveling mechanism, means for confirming antenna's own position, and an antenna orientation-adjusting mechanism including orientation-confirming means. The lens antenna device is mounted on a mobile body and performs highly sensitive reception of radio waves from a stationary satellite etc. In the lens antenna device during the movement of the mobile body, an initial position of the antenna is maintained by leveling through the antenna-leveling mechanism and by automatic orientation correction based on own-position information and orientation information.
Abstract:
A sectored antenna system has one or more dielectric lenses, each having a surface and two or more antenna feed devices tilted non-parallel to the lens surface and preferably angled in a V pattern. At least one of the feed devices radiate signals into said lens that emerge as separate directional beams, or the lenses receive incoming signals from different directions and focus them onto different antenna feed devices. The feed devices of the sectored antenna system have a dielectric constant of between about 5 and 15 and preferred about 10 and further has a mounting collar to mount the antenna feed devices about the lens to adjust for elevation, azimuth, radial and rotational orientation.
Abstract:
Radarsensor mit einem zumindest abschnittsweise kugelförmigen Sensorgehäuse, welches in einer Befestigungsvorrichtung drehbar gelagert ist. Beispielsweise ist das Sensorgehäuse kugelförmig.
Abstract:
A high-gain, wide-angle, multi-beam, multi-frequency beamforming lens antenna that includes a Luneburg lens with at least one planar interface in the southern hemisphere of the Luneburg lens and a planar ultrawideband modular antenna (PUMA array) structure. The PUMA array structure is connected to at least one of the planar interfaces of the Luneburg lens and is configured to function as a feed network to illuminate cells of the Luneburg lens simultaneously.
Abstract:
The invention concerns a device for transmitting and receiving microwaves comprising a planar radiating element. Said device is characterised in that the radiating element (60) has, for transmitting and receiving, substantially orthogonal accesses (68, 66), the phase shift of the transmission and reception signals and the shape of the radiating element being such that the transmission and reception signals, whereof the frequencies are different, are subjected to circular polarisation in opposite directions.