Transfer function system for determining an identifier on a surface acoustic wave identification tag and method of operating the same
US6958696B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 2002 |
| Grant date | Oct 25, 2005 |
| Priority date | — |
| Expiry date | Oct 9, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/6406
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A transfer function system for determining an identifier on a surface acoustic wave (SAW) identification tag and a method of operating the same. In one embodiment the system provides for (1) generating a radio frequency (RF) interrogation signal that causes a transducer located on a piezoelectric substrate to produce an initial acoustic pulse that reflects off of a plurality of reflectors arranged according to time and phase position on the substrate to yield response acoustic pulses, the transducer generating an RF response signal from the response acoustic pulses; and (2) determining the identifier by decoding the RF response signal in view of predefined time, phase and amplitude parameters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.