Stabilization and Control of Acoustic Surface Wave Devices.
Abstract
The patent application describes a thin film acoustic surface wave device having input and output transducers selectively spaced apart by a prescribed distance. Signals applied to the input transducer are propagated along the surface of the thin film and received by the output transducer. A delay is established which is proportional to the prescribed spacing and to the strain (i.e. tension or compression) which is applied to the device. The thin film surface acoustic wave device is manipulated by an appropriate application of the strain which in turn advantageously provides a variation in phase velocity. Such phase variation may be accurately controlled to yield variable oscillators, variable filters and other devices which vary as a function of the phase velocity. Also, means are provided for inducing strain electrically and mechanically so that the phase velocity across the surface of the substrate may be controlled.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 19, 1975
- Accession Number
- ADD001262
Entities
People
- Max Epstein
Organizations
- United States Department of the Navy