Identification band using serpentine paths to detect tampering
First Claim
1. A tamper-resistant RFID identification apparatus, comprising:
- a band;
an RFID circuit disposed on the band;
an electrically conductive loop disposed on the band and electrically coupled to the RFID circuit, and also arranged to disable the RFID circuit when cut, wherein the conductive loop also overlaps itself at at least one overlap point; and
an insulating material disposed between the portions of the conductive loop at the at least one overlap point;
wherein the band includes a series of holes along a length thereof; and
wherein the conductive loop is formed from a first and second conductive loop portion, wherein each conductive loop portion passes closely by a respective section of at least one hole such that the first and second conductive portions together substantially surround the at least one hole.
5 Assignments
0 Petitions
Accused Products
Abstract
A tamper-resistant RFID wristband that becomes permanently disabled upon tampering. The wristband includes a plurality of holes for snugly securing the band to a wearer, an RFID circuit, and an electrically conductive loop disposed in the band. The RFID circuit and the conductive loop are electrically coupled to form a series circuit, severance of which disables the wristband. The electrically conductive loop includes a first layer and a second layer that are electrically isolated from one another, save for at least one electrical connection made preferably by a via at the end of the band distal from the antenna element. The first layer encircles the holes in a serpentine path on one layer of the band and the second layer encircles the holes in a complimentary serpentine path on a different layer of the band.
110 Citations
18 Claims
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1. A tamper-resistant RFID identification apparatus, comprising:
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a band; an RFID circuit disposed on the band; an electrically conductive loop disposed on the band and electrically coupled to the RFID circuit, and also arranged to disable the RFID circuit when cut, wherein the conductive loop also overlaps itself at at least one overlap point; and an insulating material disposed between the portions of the conductive loop at the at least one overlap point; wherein the band includes a series of holes along a length thereof; and wherein the conductive loop is formed from a first and second conductive loop portion, wherein each conductive loop portion passes closely by a respective section of at least one hole such that the first and second conductive portions together substantially surround the at least one hole. - View Dependent Claims (2, 3, 4, 5)
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6. A method of making a tamper resistant RFID identification apparatus, comprising:
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providing a band with at least two surfaces, and having a series of holes along a length thereof; completely encircling the series of holes with a conductive loop disposed in the band, by forming a first conductive path passing closely by the holes on one surface of the band, and forming a second conductive path passing closely by the holes in a complimentary path on a second surface of the band; and disposing an RFID circuit in the band, such that the RFID circuit and the conductive loop are electrically coupled. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A tamper-resistant RFID identification apparatus, comprising:
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a band having a series of holes along a length thereof; an RFID circuit disposed in the band; an electrically conductive loop disposed in the band and electrically coupled to the RFID circuit, wherein the conductive loop travels along the band in a path substantially surrounding at least two holes and creating at least one overlap point therebetween, wherein the loop is insulated at the loop overlap point. - View Dependent Claims (17, 18)
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Specification