Radio frequency certificates of authenticity and related...

Details Radio frequency certificates of authenticity and related... Radio frequency certificates of authenticity and related...

2006-11-30

2010-02-09

Nguyen, Hoang V (Department: 2821)

Communications: radio wave antennas

Antennas

Microstrip

Reexamination Certificate

active

07659851

ABSTRACT:
Radio frequency certificates of authenticity (RFCOAs) and associated scanners are presented. In one implementation, an array of miniaturized antenna elements in an RFCOA scanner occupies an area smaller than a credit card yet obtains a unique electromagnetic fingerprint from an RFCOA associated with an item, such as the credit card. The antenna elements are miniaturized by a combination of both folding and meandering the antenna patch components. The electromagnetic fingerprint of an exemplary RFCOA embeddable in a credit card or other item is computationally infeasible to fake, and the RFCOA cannot be physically copied or counterfeited based only on possession of the electromagnetic fingerprint.

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patent: WO03/023900 (2003-03-01), None
PCT Search Report for PCT Application No. PCT/US 06/22861, mailed Jul. 23, 2007 (7 pages).

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