Inexpensive modulated backscatter reflector

G - Physics – 01 – V

Patent

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Details

G01V 15/00 (2006.01) G01S 13/74 (2006.01) G01S 13/75 (2006.01) G06K 19/07 (2006.01) H04B 7/145 (2006.01) H04B 7/22 (2006.01)

Patent

CA 2222320

The present invention provides for an inexpensive RFID Tag design which uses an inexpensive Backscatter Modulator. The modulator is simply a CMOS gate driven by a shift register containing a modulating signal. The CMOS gate is connected to the antenna such that it modulates the reflectivity of the antenna in accordance with the modulating signal. In a second embodiment, the Tag is incorporated into a single CMOS integrated circuit which comprises all of the components, except for the antenna, necessary to implement an inexpensive read-only RFID Tag.

La présente invention est une étiquette d'identification radiofréquence peu onéreuse utilisant un modulateur de signaux rétrodiffusés peu onéreux. Celui-ci est simplement constitué d'une porte CMOS attaquée par un registre à décalage contenant un signal de modulation. Cette porte est connectée à l'antenne de façon à moduler avec le signal de modulation le signal qui est réfléchi par celle-ci. Dans une seconde concrétisation de l'invention, l'étiquette est incorporée à un circuit intégré CMOS unique contenant tous les éléments, à l'exception de l'antenne, qui sont nécessaires pour constituer une étiquette d'identification radiofréquence à lecture seulement peu onéreuse.

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