Card with metal layer and an antenna
US9721200B2 · kind B2 · utility
55Cited by
5References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 17, 2014 |
| Grant date | Aug 1, 2017 |
| Priority date | — |
| Expiry date | Nov 17, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49016
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In a smart card having an antenna structure and a metal layer, an insulator layer is formed between the antenna structure and the metal layer to compensate for the attenuation due to the metal layer. The thickness of the insulator layer affects the capacitive coupling between the antenna structure and the metal layer and is selected to have a value which optimizes the transmission/reception of signals between the card and a card reader.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.