Title :
P-Matrix based calculations of the potential and kinetic power in resonating SAW-structures
Author :
Kubat, F. ; Ruile, W. ; Reindl, L.
Author_Institution :
Inst. of Electr. Inf. Technol., Technische Univ. Clausthal, Germany
Abstract :
Acoustomigration of metal structures is a phenomenon which may occur in Surface Acoustic Wave (SAW) devices operating at high power levels. This deteriorates the performance or can even destroy the SAW device. Acoustomigration is caused by the stored acoustic energy, which can be very high in resonating structures with good quality factors. We extended our P-Matrix based model to calculate. the stored energy in arbitrary SAW structures. We present a method to calculate the total power distribution, and the kinetic and potential power and their relative position within the structure. We discuss the corresponding time, behavior in resonating and non-resonating structures; Acoustomigration patterns have been compared to the calculated results.
Keywords :
interdigital transducers; surface acoustic wave devices; P-Matrix based calculations; acoustomigration; good quality factors; high power levels; kinetic power; performance deterioration; potential; resonating SAW-structures; resonating structures; stored acoustic energy; Acoustic devices; Acoustic propagation; Acoustic testing; Acoustic waves; Kinetic theory; Power distribution; Resonance; Resonant frequency; Surface acoustic wave devices; Surface acoustic waves;
Conference_Titel :
Ultrasonics Symposium, 2002. Proceedings. 2002 IEEE
Print_ISBN :
0-7803-7582-3
DOI :
10.1109/ULTSYM.2002.1193413
