Near field communications reader
US9397385B2 · kind B2 · utility
3Cited by
6References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 9, 2011 |
| Grant date | Jul 19, 2016 |
| Priority date | — |
| Expiry date | May 18, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45726
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The present application relates to a near field communications (NFC) reader having a power amplifier which has an output that connects to an input terminal of an antenna by means of an antenna filter made up of one or more series resistors and one or more series capacitors. The NFC reader includes means for adjusting the Q factor of the antenna so as to increase the available transmit bandwidth and/or improve the efficiency of the reader. The means for adjusting the Q factor of the antenna may be, for example, a variable resistive component or one or more switches.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.