Self-parameterising RFID antenna extender
US8840023B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 10, 2010 |
| Grant date | Sep 23, 2014 |
| Priority date | — |
| Expiry date | Mar 10, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/07767
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An antenna extender configured to be coupled electromagnetically to an RFID read/write station. The extender includes a first circuit oscillating at variable frequency and a second oscillating circuit coupled to the first oscillating circuit, and a processing unit which is powered by energy supplied by the second oscillating circuit when the extender is placed close to the read/write station. The processing unit includes a mechanism to measure voltage at terminals of the second oscillating circuit and a controller that can be used to vary resonance frequency of the first oscillating circuit as a function of the value of the measured voltage to optimize frequency tuning between the extender and the read/write station.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.