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US 3,931,598 AGranted
Normal reflective array compressor and method
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorWayne L. Bongianni
Life of this patent
Estimating the term…
Abstract
Surface acoustic waves on a piezoelectric crystal substrate beat with the bulk shear wave energy generated by the incident surface wave and which pass through the thickness of the substrate to produce a beat signal which is collected and is useful in pulse systems.
Claims5
An acoustic wave device comprising:
- a piezoelectric substrate having oppositely disposed flat surfaces;
- an input transducer on one surface of said substrate for launching acoustic surface waves traveling down said surface;
- an output transducer on the other opposite surface of said transducer for collecting acoustic surface waves traveling on said opposite surface in a direction opposite to the direction of travel on said one surface;
- said input and output transducers comprising metallic electrodes, the electrodes of said input transducer being in line with corresponding electrodes of said output transducer;
- arrays of electrode fingers on each of said surfaces, each said array having spacings between adjacent electrodes thereof which vary along the length of the substrate over which the acoustic surface wave is adapted to travel;
- the widths of the electrodes and the spacings between them of both arrays being the same with corresponding electrodes and spacings of both arrays on said opposite surfaces being in line with each other.
3 more elements
Dependencies are inferred from the claim text.