Charging long-range radio frequency identification tags
US10474852B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 4, 2017 |
| Grant date | Nov 12, 2019 |
| Priority date | — |
| Expiry date | May 19, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/345
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A system for charging long-range radio frequency identification tags includes a plurality of physically separated transmitters. Each transmitter is configured to direct a respective energy beam to an energy location. A tag is at the energy location. The tag is configured to store a received energy from the energy location, to sense a sensor data and to transmit the sensor data to a reader after a capacitor connected to the tag charges to an operating voltage level. The capacitor is charged by the received energy. A controller is configured to align at the energy location for each of the plurality of transmitters, a respective frequency, and at least one of a respective phase, and a respective polarity of each respective energy beam to maximize an energy level at the energy location in response to a device response of the tag.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.