Tunable antenna circuit, particularly for contactless integrated circuit reader
US7113139B2 · kind B2 · utility
27Cited by
5References
36Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 6, 2005 |
| Grant date | Sep 26, 2006 |
| Priority date | — |
| Expiry date | May 6, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03J2200/10
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An antenna circuit tunable to a determined resonance frequency, includes an antenna coil and adjustable components. The antenna circuit includes a filter having at least one point to tap an electric voltage the amplitude of which forms a pertinent indication for the tuning of the antenna circuit. To tune the antenna circuit, the adjustable components of the antenna circuit are adjusted so that the electric voltage has a determined amplitude.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.