Radio frequency identification (rfid) tag including a...

G - Physics – 06 – K

Patent

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G06K 19/077 (2006.01)

Patent

CA 2715279

This disclosure describes a radio frequency identification (RFID) tag that includes a three-dimensional (3D) loop antenna. The 3D loop antenna includes a first conductive portion having a length and width that substantially exceed a thickness. The length and width of the first conductive portion substantially lie in a first plane. The 3D loop antenna includes a second conductive portion having a length and width that substantially exceed a thickness. The length and width of the second conductive portion substantially lie in a second plane that is substantially parallel to the first plane. An RFID circuit electrically connected to the loop antenna excites a current through the first and second conductive portions in a current loop that lies in a third plane that is not substantially parallel to the first and second planes. In some instances the third plane may be substantially perpendicular to the first and second planes.

La présente invention concerne une étiquette didentification par radiofréquence (RFID) comprenant une antenne cadre tridimensionnelle (3D). Lantenne cadre 3D comprend une première partie conductrice ayant une longueur et une largeur qui excèdent sensiblement une épaisseur. La longueur et la largeur de la première partie conductrice se situent sensiblement dans un premier plan. Lantenne cadre 3D comprend une seconde partie conductrice ayant une longueur et une largeur qui excèdent sensiblement une épaisseur. La longueur et la largeur de la seconde partie conductrice se situent sensiblement dans un deuxième plan qui est sensiblement parallèle au premier plan. Un circuit RFID connecté électriquement à lantenne cadre excite un courant à travers les première et seconde parties conductrices dans une boucle de courant qui se situe dans un troisième plan qui nest pas sensiblement parallèle aux premier et deuxième plans. Dans certains exemples, le troisième plan peut être sensiblement perpendiculaire aux premier et deuxième plans.

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