Helical antenna

H - Electricity – 01 – Q

Patent

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Details

H01Q 1/36 (2006.01) H01Q 11/08 (2006.01)

Patent

CA 2236963

A helical antenna comprising a cylindrical dielectric member 1, four spiral conductors 2a to 2d which are wound around the outer wall of the cylindrical dielectric member 1, four spiral conductors 3a to 3d which are attached to the inner wall of the cylindrical dielectric member 1, and power supply circuits 4, 5 for supplying high-frequency power to the spiral conductors 2a to 2d and the spiral conductors 3a to 3d respectively. That is, the spiral conductors serving as radiation elements are disposed at the outside and inside of the cylindrical dielectric member, and the outer and inner conductors are operated as independent helical antennas. These spiral conductors are connected to the power supply circuits for supplying the high-frequency power having desired amplitude and phase.

L'invention est une antenne hélicoïdale comportant un élément diélectrique cylindrique 1, quatre conducteurs en spirale 2a à 2d enroulés autour de la paroi externe de l'élément diélectrique cylindrique 1, quatre conducteurs en spirale 3a à 3d fixés à la paroi interne de l'élément diélectrique cylindrique 1, et des circuits d'alimentation 4, 5 servant à alimenter à haute fréquence les conducteurs en spirale 2a à 2d et les conducteurs en spirale 3a à 3d respectivement. Les conducteurs en spirale servant d'éléments rayonnants sont montés sur les faces externe et interne de l'élément diélectrique cylindrique et les conducteurs externe et interne sont utilisés comme antennes hélicoïdales indépendantes. Ces conducteurs en spirale sont connectés aux circuits d'alimentation, lesquels les alimentent avec des courants haute fréquence ayant des amplitudes et des phases appropriées.

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