Mobile wireless communications device including NFC antenna matching control circuit and associated methods
US9270337B2 · kind B2 · utility
216Cited by
18References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 12, 2015 |
| Grant date | Feb 23, 2016 |
| Priority date | — |
| Expiry date | Jan 12, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B5/70
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A mobile wireless communications device includes a near-field communications (NFC) transceiver, NFC antennas and an NFC control circuit. The NFC transceiver generates a received signal strength based on a received signal from an adjacent NFC device. The NFC control circuit includes an antenna switch circuit coupled between the NFC transceiver and the NFC antennas. A capacitance sensing circuit is coupled to the NFC antennas to determine capacitance values thereof. A processor operates the antenna switch circuit based upon the received signal strength and the capacitance values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.