Surface acoustic wave identification tag having enhanced data content and methods of operation and manufacture thereof
First Claim
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1. A surface acoustic wave (SAW) identification tag, comprising:
- a piezoelectric substrate having a SAW transducer located thereon;
a group of slots on said substrate, each of said slots arranged by both a pulse position and a phase position; and
a number of reflectors distributed among said slots such that said reflectors encode a number by both pulse position and phase position.
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Abstract
A surface acoustic wave (SAW) identification tag and methods of operating and manufacturing the tag. In one embodiment, the tag includes: (1) a piezoelectric substrate having a SAW transducer located thereon, (2) a group of slots arranged by both pulse position and phase position on said substrate; and (3) a number of reflectors distributed among the slots such that the reflectors encode a number by both pulse position and phase position.
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Citations
36 Claims
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1. A surface acoustic wave (SAW) identification tag, comprising:
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a piezoelectric substrate having a SAW transducer located thereon;
a group of slots on said substrate, each of said slots arranged by both a pulse position and a phase position; and
a number of reflectors distributed among said slots such that said reflectors encode a number by both pulse position and phase position. - View Dependent Claims (3, 4, 5, 6, 9, 10, 11, 12)
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2. The SAW identification tag as recited in claim wherein said reflectors are arranged wherein said phase position is in quadrature.
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7-8. -8. (canceled)
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13. A method of operating a surface acoustic wave (SAW) identification tag, comprising:
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exciting a SAW transducer located on a piezoelectric substrate to create a SAW;
causing said SAW to reflect from reflectors distributed among a group of slots, each of said slots arranged by both a pulse position and a phase position on said substrate; and
demodulating reflected portions of said SAW to yield a number encoded by both pulse position and pulse position. - View Dependent Claims (14, 15, 16, 17, 18, 21, 22, 23, 24)
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19-20. -20. (canceled)
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25. A method of manufacturing a surface acoustic wave (SAW) identification tag, comprising:
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forming a SAW transducer on a piezoelectric substrate; and
depositing reflectors among a group of slots on said substrate, each of said slots arranged by both a pulse position and a phase position, said reflectors encoding a number by both pulse position and phase position. - View Dependent Claims (26, 27, 28, 29, 30, 33, 34, 35, 36)
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31-32. -32. (canceled)
Specification