Transfer function system for determining an identifier on a surface acoustic wave identification tag and method of operating the same
First Claim
1. A system for determining an identifier on a surface acoustic wave (SAW) identification tag, comprising:
- 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 said substrate to yield response acoustic pulses, said transducer generating an RF response signal from said response acoustic pulses;
determining said identifier by decoding said RF response signal in view of predefined time, phase and amplitude parameters.
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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.
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Citations
20 Claims
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1. A system for determining an identifier on a surface acoustic wave (SAW) identification tag, comprising:
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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 said substrate to yield response acoustic pulses, said transducer generating an RF response signal from said response acoustic pulses;
determining said identifier by decoding said RF response signal in view of predefined time, phase and amplitude parameters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of operating a system for determining an identifier on a surface acoustic wave (SAW) identification tag, comprising:
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causing a radio frequency (RF) interrogation signal to be generated that excites a transducer located on a piezoelectric substrate into producing an initial acoustic pulse that reflects off of a plurality of reflectors arranged according to time and phase position on said substrate to yield response acoustic pulses, said transducer generating an RF response signal from said response acoustic pulses;
detecting said RF response signal and decoding said identifier from said RF response signal in view of predefined time, phase and amplitude parameters. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification