Excitation of Shear Elastic Waves by an Interdigital Transducer Operated at Its Surface-Wave Center Frequency

1 June 1972

journal article
research article
Published by AIP Publishing in Journal of Applied Physics

Vol. 43 (6) , 2498-2501
https://doi.org/10.1063/1.1661549

Abstract

The excitation of shear elastic waves by an interdigital transducer operated at its surface‐wave center frequency is discussed. It is shown experimentally for the high‐coupling orientation of LiNbO3 that the shear‐wave power radiated by an interdigital transducer may be an appreciable part of the input electrical power even at the surface‐wave center frequency. The mode conversion of surface waves to shear waves at a receiving transducer is also considered. It is shown that the shear‐wave radiation pattern of an electrically driven interdigital transducer is well described by treating the transducer as a phased‐array antenna.

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