Radiofrequency transponder device with optimized passive resonant circuit
US9104954B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 15, 2012 |
| Grant date | Aug 11, 2015 |
| Priority date | — |
| Expiry date | May 16, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/07794
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The invention relates to a radiofrequency device comprising a passive antenna tuned or intended to be tuned in frequency with at least one transponder, said transponder comprising an integrated circuit chip linked to an antenna interface defining an electromagnetic coupling surface periphery, said passive antenna comprising a main loop formed of turns comprising at least one portion of surface (B) inside the loop, at least one recess of the main loop, oriented from the interior to the exterior of the main loop, said portion of surface (B) being located in said recess so as to effect an electromagnetic coupling with a transponder circuit; the device is distinguished in that it comprises two recesses receiving or intended to receive a transponder each.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.