Archives of Acoustics, 30, 4, pp. 515–519, 2005

Spectral theory of unidirectional transducers

E. DANICKI
Institute of Fundamental Technological Research Polish Academy of Sciences

A spectral theory of single-phase unidirectional transducers of the surface acoustic waves
is presented. It helps to evaluate the stop-band width where the directionality takes place, and
allows one to optimize the transducer structure in order to obtain its symmetric frequency
response, with maximum directionality at the stop-band center.
Keywords: surface acoustic waves, interdigital transducers
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