Method and apparatus for wireless power delivery tracking
US11011941B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 10, 2019 |
| Grant date | May 18, 2021 |
| Priority date | — |
| Expiry date | Jan 16, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q21/225
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A wireless power generating unit, includes, in part, a multitude of transmitting elements transmitting a multitude of RF signals to a wireless device, a backscatter RF receiver configured to receive the backscattered RF signal from the wireless device in response to the transmission of the RF signals, and a processor adapted to change the phases of the multitude of RF signals values in accordance with the strength of the received backscattered signal. The phases are changed to maximize the strength of the backscattered signal which may be modulated by varying a resistive load at the wireless device. The modulated backscattered signal may be encoded to carry information. The modulation frequency may be representative of the identity of the wireless device. The information may define the amount of RF power received by the wireless device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.