H - Electricity – 01 – P
Patent
H - Electricity
01
P
H01P 1/18 (2006.01) H01L 41/09 (2006.01) H01Q 3/32 (2006.01)
Patent
CA 2374349
A steerable phased array antenna has a plurality of antenna elements each having an associated phase-shifter. The phase-shifters have actuators which change shape in response to electrical signals and in so doing cause either a path length of signals to be radiated from the antenna elements to change or a propagation constant of a transmitting medium to change, thereby introducing phase shift into the respective signal. The actuators comprise tubular stator (22) of piezoelectric or magnetostrictive material; a piston (26) coaxially disposed within the stator and a bearing member (24) disposed between the stator (22) and piston (26) which are configured such that the stator (22) distorts in an approximately frustro-conical manner in response to said control signal thereby causing the bearing member (24) to roll axially along the stator (22) and the movement of the bearing member (24) in turn causing axial movement of the piston (26).
L'invention concerne une antenne réseau à commande de phase orientable comprenant plusieurs éléments d'antenne possédant chacun un compensateur de phase associé. Les compensateurs de phase sont équipés d'actionneurs qui changent de forme en réponse aux signaux électriques, provoquant ainsi le changement d'une longueur de trajet de signaux soumis au rayonnement des éléments d'antenne, ou le changement d'une constante de propagation d'un support de transmission, introduisant ainsi un changement de phase dans le signal correspondant. Les actionneurs comprennent un stator tubulaire (22) fait d'une matière piézoélectrique ou magnétostrictive, un piston (26) disposé de manière coaxiale dans le stator, et un élément d'appui (24) disposé entre le stator (22) et le piston (26), configurés de manière que le stator (22) prenne pratiquement la forme d'un cône tronqué en réponse audit signal de commande, provoquant ainsi le roulement axial de l'élément d'appui (24) le long du stator (22), le mouvement de l'élément d'appui (24) causant à son tour le mouvement axial du piston (26).
Lane Anthony Alan
Millar Caroline Elizabeth
Kirby Eades Gale Baker
Marconi Caswell Limited
Marconi Optical Components Limited
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