RFID tag location and association of RFID tags
US11506777B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Mar 22, 2019 |
| Grant date | Nov 22, 2022 |
| Priority date | — |
| Expiry date | Apr 19, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/75
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An RFID detector suitable for use in a passive RFID tag system that employs frequency hopping spread spectrum (FHSS) operation obtains an indication of at least one characteristic of a CW RF signal employing a hopped-to carrier frequency that is being transmitted from an RFID tag reader, e.g., for use in activating the RFID tag to be located, the indication of the characteristic being obtained based on a signal that is received from a source other than the RFID detector. The RFID detector may use the obtained indication of the characteristic of the CW RF signal to determine at least one position related parameter for the RFID tag. A location, e.g., of the tag, of a group of tags, of the RFID detector, or of another RFID detector, may be determined based on the position parameter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.