High-Q and over-coupled near-field RFID reader antenna for improved tag read range
US10102697B2 · kind B2 · utility
3Cited by
4References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 31, 2015 |
| Grant date | Oct 16, 2018 |
| Priority date | — |
| Expiry date | Oct 31, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C9/00309
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An RFID system in which at least one of the RFID tag antenna and the RFID reader antenna has an impedance matching network associated therewith in order to better match the impedances of the two antennas. This impedance matching places the antennas into an over-coupled regime once they are within a reasonable distance of each other (e.g., 2 to 50 mm). It also increases the Q-factor of the improved antenna, which can greatly increase the range at which the RFID reader can read the RFID tag. This improved RFID system may be used in any of a variety of application, including operating a door lock mechanism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.