Accession Number : ADD001262
Title : Stabilization and Control of Acoustic Surface Wave Devices.
Descriptive Note : Patent Application,
Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C
Personal Author(s) : Epstein,Max
Report Date : 19 May 1975
Pagination or Media Count : 13
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.
Descriptors : *Thin films, *Acoustic delay lines, Substrates, Electroacoustic transducers, Patents
Subject Categories : Solid State Physics
Distribution Statement : APPROVED FOR PUBLIC RELEASE