Battery-assisted backscatter rfid transponder

Details Battery-assisted backscatter rfid transponder Battery-assisted backscatter rfid transponder

G - Physics

06

K

G06K 19/07 (2006.01)

Patent

CA 2572787

A radio frequency transponder (28) includes at least one battery (60), which is coupled to provide electrical power for operating the transponder and at least one antenna (52), which is configured to receive and backscatter RF interrogation radiation from an interrogation device (32). An integrated circuit (56) is arranged to store a code including information and, powered only with energy provided by the battery, to vary a radiation characteristic of the antenna responsively to the code so as to modulate the information onto the backscattered radiation.

L'invention porte sur un transpondeur (28) RF comprenant au moins une batterie (60) alimentant le transpondeur, au moins une antenne (52), conçue pour recevoir et rétrodiffuser un signal d'interrogation provenant d'un dispositif d'interrogation (32), et un circuit intégré (56), uniquement alimenté par la batterie, et stockant un code comportant des informations permettant de faire varier les caractéristiques de rayonnement de l'antenne pour moduler les informations sur le rayonnement rétrodiffusé.

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