Encoded SAW RFID tags and sensors for multi-user detection using IDT finger phase modulation
US6827281B2 · kind B2 · utility
10Cited by
7References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2002 |
| Grant date | Dec 7, 2004 |
| Priority date | — |
| Expiry date | Dec 24, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/6406
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A group of SAW RFID tags or sensors each has a transducer with interdigitated fingers, a different set of fingers in each tag or sensor being reversed in phase to cause the tag or sensor to provide a unique identifier in a returned impulse response produced by the tag or sensor when interrogated by an interrogation signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.