Selectively responsive tag suitable for RFID systems and the like
US7397378B1 · kind B1 · utility
10Cited by
3References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 15, 2006 |
| Grant date | Jul 8, 2008 |
| Priority date | — |
| Expiry date | Oct 14, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/07798
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A tag for RFID applications and the like comprises an antenna supported on a dielectric substrate and having a first electrical length suitable for communication as a transponder. A selectively removable conductive shunt causes the antenna to assume a second electrical length which impedes transponder communication. Applications of the tag include tag-bearing products that are non-transmissive beneath surrounding packaging, and state machines that change between transmissive and non-transmissive states with selective shunting of the antenna. A method for enhancing an RFID tag for selective operation is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.