Bulk waves radiated from an interdigital metallic transducer deposited on an anisotropic substrate

16 January 1987

journal article
Published by Institution of Engineering and Technology (IET) in Electronics Letters

Vol. 23 (2) , 68-69
https://doi.org/10.1049/el:19870049

Abstract

The whole acoustic field emanating from a metallic interdigital transducer (IDT) deposited on an anisotropic half-space is computed. Extending the classical Lamb approach, it is shown that the field can be expressed by an integral whose singularities give rise to both Rayleigh surfaces waves (SAWs) and well collimated bulk waves (BAWs). For a Y-cut, Z-propagation quartz crystal a horizontal shear wave is excited; it is shown that the orientation and width of the main lobe can be chosen by changing the frequency.

Keywords

IDT
BAW
ANISOTROPIC HALF-SPACE
INTERDIGITAL METALLIC TRANSDUCER
MAIN LOBE ORIENTATION
ANISOTROPIC SUBSTRATE
WHOLE ACOUSTIC FIELD
MAIN LOBE WIDTH
SINGULARITIES
Z-PROPAGATION QUARTZ CRYSTAL
SAW
Y-CUT
METALLIC INTERDIGITAL TRANSDUCER
HORIZONTAL SHEAR WAVE
COLLIMATED BULK WAVES
INTEGRAL
FREQUENCY DEPENDENCE
RAYLEIGH SURFACES WAVES
CLASSICAL LAMB APPROACH

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