Rfid antenna system

H - Electricity – 01 – Q

Patent

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Details

H01Q 7/00 (2006.01) G06K 7/08 (2006.01) G06K 7/10 (2006.01) H01Q 1/22 (2006.01) H01Q 21/06 (2006.01)

Patent

CA 2683792

The invention relates to an improved RFID-antenna-system that is characterised by the following characteristics: the at least two patch antennas (21) are offset in relation to each other in the direction of the passage path (3) or at least with one component in the direction of the passage (3'), the at least two patch antennas (21) form a group of patch antennas (A, B) for grouping and for reducing the size of the monitoring area in the direction of the passage (3'), and the at least two patch antennas (21) are arranged at the same distance in relation to surface of the base (5) of the path of the passage (3) and/or on the same horizontal plane or are offset in relation thereto, such that a straight line passes through the centre and/or centre of gravity of at least two adjacent patch antennas (21) formed with the horizontal plane and/or a plane that is parallel to the surface of the base (5) at an angle .alpha. that is <= 45°.

L'invention concerne un système d'antennes RFID amélioré présentant les caractéristiques suivantes : les au moins deux antennes à plaque (21) sont disposées de façon décalée l'une par rapport à l'autre dans le sens de la voie de passage (3) ou au moins avec un composant dans la direction de passage (3'), les au moins deux antennes à plaque (21) forment un groupe d'antennes à plaque (A, B) pour concentrer et ainsi resserrer la zone de surveillance dans la direction de passage (3') et les au moins deux antennes à plaque (21) sont disposées à égale distance d'une surface de base (5) de la voie de passage (3) et/ou sur le même plan horizontal ou de façon décalée de telle sorte qu'une droite passant par les centres et/ou les centres de gravité d'au moins deux antennes à plaque (21) voisines forme avec un plan horizontal et/ou un plan parallèle à la surface de base (5) un angle .alpha. inférieur ou égal à 45°.

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