Closed-system capacitive coupling RFID
US11455478B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 8, 2019 |
| Grant date | Sep 27, 2022 |
| Priority date | — |
| Expiry date | Aug 8, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/07786
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An RFID tag for capacitively coupled RFID communication with an RFID reader. The RFID tag comprising an integrated circuit (IC), the IC including a first RFID tag electrode arranged to capacitively couple with a first electrode of the RFID reader to form a first capacitor, and a second RFID tag electrode arranged to capacitively couple with a second electrode of the RFID reader to form a second capacitor when the RFID tag is in a first position relative to the RFID reader; power supply circuitry configured to extract power from a first time-varying signal received from the RFID reader via at least one of the first RFID tag electrode and the second RFID tag electrode, and supply the extracted power to circuitry of the RFID tag; and data transmission circuitry configured to receive the extracted power from the power supply circuitry, and transmit data to the RFID reader via at least one of the first RFID tag electrode and the second RFID tag electrode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.