Sizing of an electromagnetic transponder system for an operation in extreme proximity
US7058357B1 · kind B1 · utility
17Cited by
92References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 13, 2000 |
| Grant date | Jun 6, 2006 |
| Priority date | — |
| Expiry date | Dec 9, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/0723
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system of contactless electromagnetic transmission between a terminal including a series oscillating circuit for generating an electromagnetic field and a transponder including a parallel oscillating circuit, these oscillating circuits being sized so that the coupling coefficient between them strongly decreases when the distance separating the transponder from the terminal becomes greater than a predetermined value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.