Delayed offset multi-track OFC sensors and tags
US7825805B2 · kind B2 · utility
6Cited by
9References
18Claims
0Family size
Assignee
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Key dates
| Filing date | Feb 7, 2007 |
| Grant date | Nov 2, 2010 |
| Priority date | — |
| Expiry date | Sep 3, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/6406
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Apparatus, systems, devices and methods for providing an orthogonal frequency coding technique for surface acoustic wave sensors incorporating the use of multiple parallel acoustic tracks to provide increased coding by phase shifting and delaying a code sequence. The surface acoustic wave sensor includes parallel tracks with multiple reflectors with differing delay offsets to form a complex code sequence. The reflectors may be uniform, but alternatively could include fingers withdrawn, have reflector position modulation, differing frequencies or be spatially weighted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.