Transparent micropatterned RFID antenna and articles incorporating same
US8998099B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 17, 2011 |
| Grant date | Apr 7, 2015 |
| Priority date | — |
| Expiry date | Nov 17, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q7/00
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Antennas suitable for use in RFID devices include an insulating substrate and a first conductive micropattern disposed on or in the substrate, the first conductive micropattern defining a contiguous mesh conductor. The first conductive micropattern forms an antenna responsive to at least a frequency of 915 MHz, and includes interconnected traces having a trace width in a range from 0.5 to 20 microns. Furthermore, the first conductive micropattern is characterized by an open area fraction of at least 80% or 90%. RFID devices include such an antenna and an integrated circuit configured to transmit and receive signals using the antenna. Cards, such as financial transaction cards or identification cards, include such an antenna carried by a card layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.