Surface acoustic wave identification tag having an...

G - Physics – 06 – K

Patent

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G06K 19/067 (2006.01) H03H 9/64 (2006.01)

Patent

CA 2501444

A surface acoustic wave (SAW) identification tag having a coded transducer and methods of operating and manufacturing the tag. In one embodiment the tag includes: (1) a piezoelectric substrate having a number of reflectors distributed among a group of slots arranged by both pulse position and phase position on the substrate for encoding a number by pulse and phase position; and (2) a SAW transducer located on the substrate for generating a coded interrogation pulse.

L'invention concerne une étiquette d'identification d'onde acoustique de surface (SAW) possédant un transducteur codé et des procédés de fonctionnement et de fabrication de l'étiquette. Dans un mode de réalisation, l'étiquette comprend : (1) un substrat piézo-électrique présentant un certain nombre de réflecteurs répartis parmi un groupe de fentes disposées à la fois selon une position d'impulsion et une position de phase sur le substrat afin de coder un certain nombre de transducteurs en fonction d'une position d'impulsion et de phase; et (2) un transducteur SAW situé sur le substrat afin de générer une impulsion d'interrogation codée.

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