Accession Number : ADD011582

Title :   Compensation of Acoustic Wave Devices.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Ballato,A

Report Date : 01 Mar 1985

Pagination or Media Count : 16

Abstract : Compensation for the effects of environmentally caused changes and aging on piezoelectric acoustic wave devices is electrically provided by the application of a signal, such as a DC bias voltage, to the finger elements of an interdigital transducer formed on the surface of the acoustic wave device. This produces very large field concentrations at the finger edges which act to magnify the electric field and accordingly the electroacoustic effect which alters the acoustic waves and reflected bulk acoustic waves propagating in a piezoelectric substrate between input and output interdigital transducers.

Descriptors :   *PATENT APPLICATIONS, *ACOUSTIC EQUIPMENT, ACOUSTIC WAVES, ELECTRIC FIELDS, EDGES, FINGERS, ACOUSTIC REFLECTION, WAVE PROPAGATION, BIAS, DIRECT CURRENT, VOLTAGE, ELECTROACOUSTIC TRANSDUCERS, PIEZOELECTRIC MATERIALS, TRANSDUCERS

Subject Categories : Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE