Circularly polarized loop reflector antenna and associated...

H - Electricity – 01 – Q

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H01Q 15/00 (2006.01) H01Q 19/13 (2006.01) H01Q 21/06 (2006.01)

Patent

CA 2721438

The antenna may include a planar re-flector having a plurality of loop electrical conduc-tors defining an array of parasitically drivable anten-na elements, and a circularly polarized antenna feed spaced from the planar reflector to parasitically drive the array of parasitically drivable antenna elements and impart a traveling wave current distribution therein. The antenna may have properties that are hybrid between parabolic reflectors and driven ar-rays, providing a relatively compact circularly polar-ized antenna capable of having low wind load. Closed circuit or loop elements may provide in-creased gain over antennas using dipole turnstile re-flector elements.

Antenne pouvant comprendre un réflecteur plan possédant une pluralité de conducteurs électriques en boucle définissant un réseau déléments dantenne excitables parasitiquement, et une source primaire dantenne à polarisation circulaire espacée du réflecteur plan et destinée à exciter parasitiquement le réseau déléments dantenne excitables parasitiquement et leur communiquer une distribution de courant en onde progressive. Lantenne peut présenter des propriétés hydrides entre celles des réflecteurs paraboliques et celles des réseaux excités, et former une antenne à polarisation circulaire relativement compacte et offrant une faible résistance au vent. Des éléments en circuit fermé ou en boucle peuvent permettre dobtenir un gain accru relativement à celui des antennes utilisant des dipôles réflecteurs en tourniquet.

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