Accession Number:

AD0753385

Title:

Geometrical Acoustics at Microwave Frequencies

Descriptive Note:

Annual rept. 1 Nov 1971-31 Oct 1972

Corporate Author:

STANFORD UNIV CA MICROWAVE LAB

Personal Author(s):

• Auld, B. A.
• Farnow, S.

Report Date:

1972-12-01

Pagination or Media Count:

21.0

Abstract:

The purpose of this investigation is to study focusing and deflection of microwave acoustic bulk wave and surface wave beams in inhomogeneous anisotropic solids and to evaluate potential device application of these effects. Initially, the emphasis was on strictly geometrical effects and on inhomogeneities induced by means of magnetic and electric fields applied to ferromagnetic and semiconducting crystals. The investigation was later expanded to include diffraction effects and optically induced inhomogeneities, using mechanisms such as photoconductivity in piezoelectric media.

Descriptors:

• *TRANSDUCERS
• SCATTERING
• MAGNETIC FIELDS
• ELECTRIC FIELDS
• LITHIUM COMPOUNDS
• ULTRASONIC RADIATION
• CADMIUM SULFIDES
• NIOBATES
• PHOTOCONDUCTIVITY
• MICROWAVE FREQUENCY
• SEMICONDUCTOR DEVICES
• PIEZOELECTRIC CRYSTALS

Subject Categories:

• Line, Surface and Bulk Acoustic Wave Devices

Distribution Statement:

APPROVED FOR PUBLIC RELEASE