Inductive evaluation of the coupling factor of an electromagnetic transponder
US8395485B2 · kind B2 · utility
9Cited by
10References
29Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 15, 2010 |
| Grant date | Mar 12, 2013 |
| Priority date | — |
| Expiry date | Jan 3, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10158
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for evaluating the current coupling factor between an electromagnetic transponder and a terminal, wherein a ratio between data representative of a voltage across an oscillating circuit of the transponder and obtained for two pairs of inductive and capacitive values of this oscillating circuit is compared with one or several thresholds, the two pairs of values preserving a tuning of the oscillating circuit to a same frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.