Semiconductor article harmonic identification

Details Semiconductor article harmonic identification Semiconductor article harmonic identification

2005-02-15

2005-02-15

Tarcza, Thomas H. (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Radar transponder system

C342S044000, C340S010420

Reexamination Certificate

active

06856275

ABSTRACT:
An harmonic intermodulation article identification system comprises a scanning dipole antenna response to an RF intermodulation harmonic product radiated from RF diodes carried by or embedded in a substrate. The product signature is applied to a spectrum analyzer that outputs a signature identification to a comparator. In response to receiving a signature identification, the comparator scans previously stored signature identifications for a match. A match indicates the received product identification from the analyzer defined a specific substrate such as a document or product tag. A match by the comparator outputs a signal to a display that indicates the identification of a substrate carrying RF diodes generating the compared product identification.

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PCT Report for PCT/US 02/40933, 8 pages, Jul. 4, 2003.

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