Method for determining a value of an electromagnetic field strength, method for coupling a reader, chip card, and reader for a chip card
US12260286B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 23, 2022 |
| Grant date | Mar 25, 2025 |
| Priority date | — |
| Expiry date | Mar 23, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/0723
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method is for determining a value of an electromagnetic field strength by means of a chip card, having the steps of: providing a chip card having a coil and an integrated circuit; calibrating the chip card by means of different values of an electromagnetic field strength, wherein a power of the integrated circuit is determined in each case for a specific value of the electromagnetic field strength; correlating the different values of the electro-magnetic field strengths with a corresponding power of the integrated circuit in each case; applying an electromagnetic field strength of an unknown value to the chip card; determining a power of the integrated circuit; and determining the value of the electromagnetic field strength corresponding to this power by means of the correlation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.