Sideband diversity reader for electronic identification system
US6867687B2 · kind B2 · utility
7Cited by
5References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 8, 2001 |
| Grant date | Mar 15, 2005 |
| Priority date | — |
| Expiry date | Jun 7, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/0008
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An electronic radio frequency identification system comprises a reader 12 and a plurality of transponders to be read by the reader. The reader comprises a recovery circuit 32 for recovering and separating an upper sideband 26.12 and a lower sideband 26.11 of a modulated response signal 26.1 from one of the transponders. The reader further comprises an evaluating circuit 38 for evaluating and selecting one of the upper sideband the lower sideband for output to a next stage, based on the evaluation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.