Apparatus for magnetically decoupling an RFID tag
US6208235A · kind A · utility
154Cited by
41References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 5, 1998 |
| Grant date | Mar 27, 2001 |
| Priority date | — |
| Expiry date | Mar 5, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/753
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A resonant circuit tag includes an integrated circuit for storing data and an antenna circuit for generating a first local field and resonating at a first predetermined radio frequency. A second circuit including an inductive coil selectively generates a second local field such that a sum of the first and second local fields approaches zero. The second circuit thus allows the resonant tag to be selectively decoupled from its environment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.