RFID tag using a surface insensitive antenna structure
First Claim
1. A radio frequency identification (RFID) device comprising:
- a pair of conductive tabs on a first surface of the dielectric layer;
a conductive structure; and
a dielectric layer between the conductive tabs and the conductive structure;
wherein the dielectric layer has a thinner portion and a thicker portion; and
wherein one of the conductive tabs is at least partially on the thinner portion of the dielectric layer.
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Accused Products
Abstract
An RFID device includes conductive tabs, and a conductive structure, with a dielectric layer between the conductive tabs and the conductive structure. The conductive structure overlaps the conductive tabs and acts as a shield, allowing the device to be at least somewhat insensitive to the surface upon which it is mounted, or to the presence of nearby objects, such as goods in a carton or other container that includes the device. The dielectric layer may be a portion of the container, such as an overlapped portion of the container. Alternatively, the dielectric layer may be a separate layer, which may vary in thickness, allowing one of the conductive tabs to be capacitively coupled to the conductive structure. As another alternative, the dielectric layer may be an expandable substrate that may be expanded after fabrication operations, such as printing.
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Citations
17 Claims
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1. A radio frequency identification (RFID) device comprising:
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a pair of conductive tabs on a first surface of the dielectric layer;
a conductive structure; and
a dielectric layer between the conductive tabs and the conductive structure;
wherein the dielectric layer has a thinner portion and a thicker portion; and
wherein one of the conductive tabs is at least partially on the thinner portion of the dielectric layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An RFID device comprising:
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a pair of dielectric layers joined together to create an overlapping portion;
a pair of conductive tabs on one of the dielectric layers, at the overlapping portion; and
a conductive structure on the other of the dielectric layers, at the overlapping portion, the dielectric layers of the overlapping portion thereby being between the conductive structure and the conductive tabs. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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Specification