Communication method between a dual interface NFC card inserted into an NFC terminal, and an NFC device
US9793961B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 28, 2016 |
| Grant date | Oct 17, 2017 |
| Priority date | — |
| Expiry date | Jul 28, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W4/80
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In a general aspect, a method for transmitting data between an NFC card and an external NFC device via a selected interface (e.g., contact or contactless), and further via a contactless interface of the NFC module when the contact interface of the NFC card is selected can include using an NFC card that includes an antenna circuit having an antenna coil with a magnetic axis and an electrically conductive screen extending near the antenna coil. The magnetic axis of the antenna coil can be substantially parallel to a plane defined by the NFC card and not cross the conductive screen. The contactless interface of the NFC card, when selected by the NFC card, can emit data by emitting bursts of magnetic field from the antenna coil, so as to compensate for effects of the conductive screen on a maximum distance for transmitting data by load modulation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.