Ucr: an unclonable environmentally-sensitive chipless rfid tag
AssigneeUniversity of Florida Research Foundation, Inc.
InventorsMark M. Tehranipoor, Haoting Shen, Kun Yang, Domenic J. Forte
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Abstract
Chipless RFID tags and methods of using the same are provided. Each RFID tag provided herein can generate a unique and unclonable (unclonable chipless RFID, or UCR) identifier from its intrinsically random manufacturing process. The UCR device can monitor increase in storage temperature beyond that which is appropriate for a specific commodity to which the device is attached.
Claims20
A chipless radio-frequency identification (RFID) tag for tracking a product, the chipless RFID tag comprising:
- a first substrate;
- a plurality of slot resonators fabricated on the first substrate, wherein each slot resonator has a characteristic resonance frequency value that randomly deviates from a theoretical resonance frequency value determined by a geometric dimension and a material property of both the slot resonators and the first substrate,
- wherein a resonance frequency signature of the tag is a collection of each of the plurality of slot resonators' characteristic resonance frequency value, and
- wherein the tag is integrated with, attached to, or printed on the product or a package thereof.
A method of enrolling a target chipless radio-frequency identification (RFID) tag in a centralized database, the method comprising:
- providing the target chipless RFID tag, wherein the target tag comprises a plurality of slot resonators fabricated on a substrate, wherein each slot resonator has a characteristic resonance frequency value that randomly deviates from a theoretical resonance frequency value determined by a geometric dimension and a material property of both the slot resonators and the substrate, wherein a resonance frequency signature of the tag is a collection of each of the plurality of slot resonators' characteristic resonance frequency value;
- determining a theoretical resonance frequency signature of the target tag;
- scanning the target tag with a radio frequency (RF) signal;
- determining a characteristic resonance frequency signature of the target tag;
- calculating the Euclidean distance ED0,i between and ;
- and
- storing ED0,i as an analog index of the target tag in the centralized database, wherein i denotes a digital index assigned to the target tag.
A method of verifying the existence of a target chipless radio-frequency identification (RFID) tag in a centralized database, the method comprising:
- providing the target chipless RFID, wherein the target tag comprises a plurality of slot resonators fabricated on a substrate, wherein each slot resonator has a characteristic resonance frequency value that randomly deviates from a theoretical resonance frequency value determined by a geometric dimension and a material property of both the slot resonators and the substrate, wherein a resonance frequency signature of the tag is a collection of each of the plurality of slot resonator' characteristic resonance frequency value;
- scanning the target tag with an RF signal;
- determining a characteristic resonance frequency signature of the target tag;
- calculating the Euclidean distance ED0,TUA between a theoretical resonance frequency signature and ;
- and
- verifying whether ED0,TUA exists in the centralized database.
Dependencies are inferred from the claim text.