Method and system for item level uhf rfid tag with low...

Details Method and system for item level uhf rfid tag with low... Method and system for item level uhf rfid tag with low...

Category

G - Physics

Subcategory

06

Subsubcategory

K

IPC codes

G06K 19/07 (2006.01)

Type

Patent

Patent number

CA 2746002

Description

A method and system for increasing the read range of a security tag by supplying an additional antenna system to the tag in order to provide power to a radio frequency identification ("RPID") chip without the need to rely solely on power from the RFID reader. The security tag includes an RFID chip and a first antenna circuit coupled to the RFID chip where the first an-tenna circuit is adapted to decode interrogation signals from an RFID reader. The security tag also includes a second antenna cir-cuit coupled to the RFID chip. The second antenna circuit is adapted to induce power from signals received from at least an alter-nate power source, such as an EAS transmitter, so that the RFID chip can be powered up and activated during an RFID interroga-tion round.

L'invention concerne un procédé et un système pour augmenter la plage de lecture d'une étiquette de sécurité en équipant l'étiquette d'un système d'antenne supplémentaire afin de fournir une puissance à une puce d'identification radiofréquence (« RFID ») sans devoir s'appuyer uniquement sur la puissance provenant du lecteur RFID. L'étiquette de sécurité comprend une puce RFID et un premier circuit d'antenne couplé à la puce RFID, le premier circuit d'antenne étant conçu pour décoder les signaux d'interrogation provenant d'un lecteur RFID. L'étiquette de sécurité comprend également un second circuit d'antenne couplé à la puce RFID. Le second circuit d'antenne est conçu pour induire une puissance à partir de signaux reçus d'au moins une autre source d'alimentation, telle qu'un émetteur EAS, de sorte que la puce RFID puisse être alimentée et activée pendant un tour d'interrogation RFID.

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