RFID label with shielding element
US8469281B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 25, 2011 |
| Grant date | Jun 25, 2013 |
| Priority date | — |
| Expiry date | Aug 25, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49016
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Described are RFID structures and methods for forming RFID structures. An RFID structure includes a loop antenna assembly, an antenna substrate supporting the loop antenna assembly, and a shielding layer parallel with a plane defined by the antenna substrate. The loop antenna assembly has a stand-alone resonant frequency of f1 above or below a standardized reader frequency range. The loop antenna includes an antenna track and at least two contact pads. The loop antenna assembly in combination with the shielding layer has a resonant frequency of f2 below the standardized reader frequency range. If positioned against a metallic surface, the loop antenna assembly in combination with the shielding layer has a resonant frequency within the standardized reader frequency range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.