Title :
Leaky wave propagation in layered structures
Author :
Naumenko, N.F. ; Didenko, I.S.
Author_Institution :
Steel & Alloys Inst., Moscow, Russia
Abstract :
The propagation characteristics of leaky waves in layered structures are analyzed as functions of overlay thickness. The behavior of different types of degenerate leaky waves with negligible attenuation, existing in quartz and lithium tetraborate, are studied when a thin film of ZnO or Al is deposited on the substrate. In particular, the propagation characteristics of a leaky wave are analyzed when its velocity approaches that of the limiting bulk wave. The general features in the behavior of leaky waves in layered structures are established as well as some peculiarities caused by the occurrence of a concavity on the slowness surface of a substrate material
Keywords :
acoustic wave propagation; acoustic wave velocity; aluminium; lithium compounds; quartz; surface acoustic wave devices; surface acoustic waves; zinc compounds; Al-LiB3O5; ZnO-SiO2; concavity; degenerate leaky waves; layered structures; leaky wave propagation; overlay thickness; propagation characteristics; slowness surface; Artificial intelligence; Attenuation; Crystals; Frequency; Substrates; Surface acoustic wave devices; Surface acoustic waves; Surface waves; Temperature; Zinc oxide;
Conference_Titel :
Ultrasonics Symposium, 1998. Proceedings., 1998 IEEE
Conference_Location :
Sendai
Print_ISBN :
0-7803-4095-7
DOI :
10.1109/ULTSYM.1998.762120
