Antenna feed assembly

H - Electricity – 01 – Q

Patent

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Details

H01Q 1/00 (2006.01) F16L 3/237 (2006.01) H01Q 1/12 (2006.01) H01Q 1/28 (2006.01) H01Q 19/17 (2006.01) H01Q 25/00 (2006.01)

Patent

CA 2718070

An antenna feed assembly (15) is provided which includes at least two elongate feed chains (1, 2) lying adjacent one another. Each feed chain is adapted to transmit or receive electromagnetic radiation between itself and the antenna (34) along a longitudinal feed axis (3, 4) thereof via a transmit/receive element (7). The feed chains (1, 2) are held in fixed lateral relationship to one another by first and second mountings (5, 6) spaced apart axially of the feed chains. The transmit/receive elements (7, 8) extend axially from the first mounting (5) towards the antenna and the second mounting (6) is positioned on a side of the first mounting (5) remote from the antenna. The first mounting (5) has a lower coefficient of thermal expansion in the lateral direction than the second mounting (6) whereby translational movement of each transmit/receive element (7, 8) in the lateral direction owing to temperature change of the assembly (15) will be reduced.

L'invention porte sur un ensemble alimentation d'antenne (15) qui comprend au moins deux chaînes d'alimentation allongées (1, 2) s'étendant adjacentes l'une à l'autre. Chaque chaîne d'alimentation est conçue pour émettre ou recevoir un rayonnement électromagnétique entre elle-même et l'antenne (34) le long d'un axe d'alimentation longitudinal (3, 4) de celle-ci par l'intermédiaire d'un élément d'émission/réception (7). Les chaînes d'alimentation (1, 2) sont maintenues en relation latérale fixe entre elles par des premier et second montages (5, 6) espacés axialement des chaînes d'alimentation. Les éléments d'émission/réception (7, 8) s'étendent axialement depuis le premier montage (5) vers l'antenne et le second montage (6) est positionné sur un côté du premier montage (5) éloigné de l'antenne. Le premier montage (5) a un coefficient de dilatation thermique dans la direction latérale plus faible que le second montage (6), ce par quoi un mouvement de translation de chaque élément d'émission/réception (7, 8) dans la direction latérale dû à une variation de température de l'ensemble (15) sera réduit.

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