Reader for a high information capacity SAW identification tag and method of use thereof
AssigneeRF SAW Components, Incorporated
InventorClinton S. Hartmann
Life of this patent
Estimating the term…
Abstract
The present invention provides for a surface acoustic wave (SAW) identification tag reader and for methods of operating and manufacturing the same. In one embodiment, the SAW identification tag reader includes: (1) a transmitter capable of sending an interrogation signal that excites a SAW transducer located on a piezoelectric substrate, the piezoelectric substrate having a group of slots arranged by both pulse position and phase position, and a number of reflectors distributed among the slots such that the reflectors return to the transducer a return signal containing a number encoded by both pulse position and phase position; and (2) a receiver for detecting the return signal and decoding the number.
Claims34
A surface acoustic wave (SAW) identification tag reader, comprising:
- a transmitter capable of sending an interrogation signal that excites a SAW transducer located on a piezoelectric substrate, said piezoelectric substrate having a group of slots arranged by both pulse position and phase position, and a number of reflectors distributed among said slots such that said reflectors return to said transducer a return signal containing a number encoded by both pulse position and phase position;
- and
- a receiver for detecting said return signal and decoding said number.
A method of operating a surface acoustic wave (SAW) identification tag reader, comprising:
- transmitting an interrogation signal to excite a SAW transducer located on a piezoelectric substrate to create a SAW, said piezoelectric substrate having a group of slots arranged by both pulse position and phase position;
- causing said SAW to reflect from a number of reflectors located on said piezoelectric substrate, said number of reflectors distributed among said slots such that said reflector return to said transducer a return signal containing a number encoded by both pulse position and phase position;
- detecting said return signal with a receiver;
- and
- decoding said number.
A method of manufacturing a surface acoustic wave (SAW) identification tag reader, comprising:
- providing a transmitter capable of sending an interrogation signal that excites a SAW transducer located on a piezoelectric substrate to create a SAW, said piezoelectric substrate having a group of slots arranged by both pulse position and phase position, and a number of reflectors distributed among said slots such that said reflectors return to said transducer a return signal containing a number encoded by both pulse position and phase position;
- and
- providing a receiver for detecting said return signal and decoding said number.
Dependencies are inferred from the claim text.