Ferrite antennas for wireless power transfer
US8487479B2 · kind B2 · utility
6Cited by
8References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 23, 2009 |
| Grant date | Jul 16, 2013 |
| Priority date | — |
| Expiry date | Feb 27, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q7/08
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
This disclosure provides systems, methods and apparatus for wireless power transfer using resonant ferrite antennas to transmit and receive power. Ferrite structures concentrate magnetic flux lines into the structure, thereby creating a magnetic path and field with less interference and eddy current losses than in device electronics, thereby improving the efficiency of magnetic power distribution. The disclosure describes tuning the resonance frequency by mechanically adjusting the position of the coil on the rod. The ferrite rod antennas described herein may be used to transfer power to handheld communication devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.