Surface acoustic wave identification tag having enhanced data content and methods of operation and manufacture thereof
AssigneeRF SAW Components, Incorporated
InventorClinton S. Hartmann
Life of this patent
Estimating the term…
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.
Claims37
A surface acoustic wave (SAW) identification tag, comprising:
- a piezoelectric substrate having a SAW transducer located thereon;
- a group of reflector locations on said substrate, each of said reflector locations arranged by both a pulse position and a phase;
- and
- a number of reflectors distributed among said reflector locations such that said reflectors encode a number simultaneously by both said pulse position and said phase.
A surface acoustic wave (SAW) identification tag, comprising:
- a piezoelectric substrate having a SAW transducer located thereon;
- a group of reflector locations on said substrate, each of said reflector locations arranged by both a pulse position and a phase;
- and
- a number of reflectors distributed among said reflector locations such that said reflectors encode a number simultaneously by both said pulse position and said phase wherein said number includes an error detection portion.
A method of operating a surface acoustic wave (SAW) identification tag, comprising:
- 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 reflector locations on said substrate, each of said reflector locations arranged by both a pulse position and a phase;
- and
- demodulating reflected portions of said SAW to yield a number encoded simultaneously by both said pulse position and said phase.
A method of operating a surface acoustic wave (SAW) identification tag, comprising:
- 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 reflector locations on said substrate, each of said reflector locations arranged by both a pulse position and a phase;
- and
- demodulating reflected portions of said SAW to yield a number encoded simultaneously by both said pulse position and said phase wherein said number includes an error detection portion.
A method of manufacturing a surface acoustic wave (SAW) identification tag, comprising:
- forming a SAW transducer on a piezoelectric substrate;
- and
- depositing reflectors among reflector locations arranged in a group on said substrate, each of said reflector locations having both a pulse position and a phase, said reflectors simultaneously encoding a number by both pulse position and phase.
A method of manufacturing a surface acoustic wave (SAW) identification tag, comprising:
- forming a SAW transducer on a piezoelectric substrate;
- and
- depositing reflectors among reflector locations arranged in a group on said substrate, each of said reflector locations having both a pulse position and a phase, said reflectors simultaneously encoding a number by both pulse position and phase wherein said number includes an error detection portion.
A surface acoustic wave (SAW) identification tag, comprising:
- a piezoelectric substrate having a SAW transducer located thereon;
- a group of reflector locations on said substrate, each of said reflector locations arranged by both a pulse position and a phase wherein said phase is defined relative to neighboring reflector locations;
- and
- a number of reflectors distributed among said reflector locations such that said reflectors encode a number simultaneously by both said pulse position and said phase.
A surface acoustic wave (SAW) identification tag, comprising:
- a piezoelectric substrate having a SAW transducer located thereon;
- a group of reflector locations on said substrate, each of said reflector locations arranged by both a pulse position and a phase wherein non-uniform spacing is utilized for said pulse position;
- and
- a number of reflectors distributed among said reflector locations such that said reflectors encode a number simultaneously by both said pulse position and said phase.
A surface acoustic wave (SAW) identification tag, comprising:
- a piezoelectric substrate having a SAW transducer located thereon;
- a group of reflector locations on said substrate, each of said reflector locations arranged by both a pulse position and a phase wherein non-uniform spacing is utilized for said phase;
- and
- a number of reflectors distributed among said reflector locations such that said reflectors encode a number simultaneously by both said pulse position and said phase.
A surface acoustic wave (SAW) identification tag, comprising:
- a piezoelectric substrate having a SAW transducer located thereon;
- a group of reflector locations on said substrate, each of said reflector locations arranged by both a pulse position and a phase wherein non-uniform spacing is utilized for both said pulse position and said phase;
- and
- a number of reflectors distributed among said reflector locations such that said reflectors encode a number simultaneously by both said pulse position and said phase.
A surface acoustic wave (SAW) identification tag, comprising:
- a piezoelectric substrate having a SAW transducer located thereon;
- a group of reflector locations on said substrate, each of said reflector locations arranged by both a pulse position and a phase;
- and
- a number of reflectors distributed among said reflector locations such that said reflectors encode a number simultaneously by both said pulse position and said phase wherein a minimum reflector spacing rule is followed when determining the placement of said reflectors distributed among said reflector locations.
A surface acoustic wave (SAW) identification tag, comprising:
- a piezoelectric substrate having a SAW transducer located thereon wherein said SAW transducer has a unidirectional character;
- a group of reflector locations on said substrate, each of said reflector locations arranged by both a pulse position and a phase;
- and
- a number of reflectors distributed among said reflector locations such that said reflectors encode a number simultaneously by both said pulse position and said phase.
A surface acoustic wave (SAW) identification tag, comprising:
- a piezoelectric substrate having a SAW transducer located thereon;
- a group of reflector locations on said substrate, each of said reflector locations arranged by both a pulse position and a phase wherein said phase of reflector locations is implemented using fine grain spatial adjustment of reflector elements by a fraction of a SAW wavelength on the device surface;
- and
- a number of reflectors distributed among said reflector locations such that said reflectors encode a number simultaneously by both said pulse position and said phase.
Dependencies are inferred from the claim text.