Multiband reception antenna for terrestrial digital audio...

H - Electricity – 01 – Q

Patent

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Details

H01Q 21/30 (2006.01) H01Q 1/12 (2006.01) H01Q 1/32 (2006.01) H01Q 5/00 (2006.01)

Patent

CA 2232254

The invention combines a loop antenna and a dipole antenna in a conformal antenna on the rear window glass of an automotive vehicle above the defogging heater grid. The loop and dipole are adapted to receive Digital Audio Broadcasting (DAB) signals in both L band and Band-III frequency bands with maximum sensitivity to vertically polarized signals while requiring minimal space on the window glass. Inductive components separate portions of the antenna pattern for signals at predetermined frequencies in order to create the different effective antenna shapes at the different frequency bands.

L'invention est une antenne conformée constituée d'une combinaison d'une antenne cadre et d'une antenne dipôle qui est installée sur la lunette arrière d'une automobile au-dessus de la grille de dégivrage. Les antennes cadre et dipôle sont adaptées pour capter les signaux de diffusion audionumérique dans les bandes de fréquences L et III avec une sensibilité maximale aux signaux polarisés verticalement, tout en ne nécessitant qu'un espace minimal sur la lunette. Des éléments inductifs segmentent le diagramme de directivité de l'antenne et produisent des diagrammes de formes différentes dans les diverses bandes de fréquences pour capter des signaux de fréquences prédéterminées.

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