Pulsed power method for increased read range for a radio frequency identification reader
US6707376B1 · kind B1 · utility
103Cited by
12References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 9, 2002 |
| Grant date | Mar 16, 2004 |
| Priority date | — |
| Expiry date | Aug 9, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10019
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method to power a radio frequency identification (RFID) reader to increase multi-tag reading capability and increase the reading range of a passive tag without maximizing the continuous transmitted power level is provided. The RFID reader transmits a pulsed interrogation signal until an RFID tag response is received, and then switches to a continuous and pulsed power scheme. The continuous power emitted maintains the power supplied to the RFID tags so the tags will not reset due to loss of power. The pulsed signal permits reading the tags at longer ranges, especially when there is a plurality of tags in the area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.