RFID tag using a surface insensitive antenna structure
US7501984B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 2005 |
| Grant date | Mar 10, 2009 |
| Priority date | — |
| Expiry date | Oct 6, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/07771
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.