Fast frequency switching for RFID applications
US11017187B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 2020 |
| Grant date | May 25, 2021 |
| Priority date | — |
| Expiry date | Jun 5, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/0709
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
RFID readers may be configured to supply power to tags during frequency hops. When a reader is supplying power to a passive RFID tag via a first RF waveform having a first radio frequency and determines that it is to frequency-hop, the reader may determine whether the tag requires power during the hop. If so, the reader begins (or continues) to synthesize a second RF waveform with a second radio frequency while also synthesizing the first RF waveform, and frequency-hops by transitioning from transmitting the first RF waveform to transmitting the second RF waveform such that the power transmitted during the transition is sufficient for the tag to operate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.