Multi-frequency rfid apparatus and methods of reading rfid tags

Details Multi-frequency rfid apparatus and methods of reading rfid tags Multi-frequency rfid apparatus and methods of reading rfid tags

G - Physics

06

K

G06K 7/08 (2006.01) H01Q 21/28 (2006.01) H01Q 21/30 (2006.01)

Patent

CA 2581585

A portable/handheld device is provided having a processing module configured to selectively operate a reading mode selected from a far-field mode and near- field mode, and a directional antenna array coupled to the processing module. The directional antenna array includes a first antenna element configured to radiate electromagnetic (EM) radiation in a far-field, and a second antenna element coupled to the first antenna element. The second antenna element is configured to radiate EM radiation in a near-field. The second antenna element includes an antenna transducer configured to selectively cancel far-field EM radiation from the first antenna element. A method is also provided for reading inductively coupled radio frequency identification (RFID) tags.

Dispositif portable/de poche ayant un module de traitement configuré pour exécuter sélectivement un mode de lecture sélectionné parmi un mode à distance infinie et un mode à distance finie, et un réseau d~antennes directionnelles couplé au module de traitement. Le réseau d~antennes directionnelles comprend un premier élément d~antenne configuré pour rayonner un rayonnement électromagnétique (EM) dans une distance infinie, et un second élément d~antenne couplé au premier élément d~antenne. Le second élément d~antenne est configuré pour rayonner un rayonnement EM dans une distance finie. Le second élément d~antenne comprend un transducteur d~antenne configuré pour annuler sélectivement le rayonnement EM à distance infinie provenant du premier élément d~antenne. Un procédé pour lire des étiquettes d~identification radio (RFID) couplées de manière inductive est également décrit.

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