Title :
Numerical and experimental analysis of complex surface acoustic wave fields
Author :
Streibl, M. ; Kutschera, H.-J. ; Sauer, W. ; Wixforth, A.
Author_Institution :
Sektion Phys., Ludwig-Maximilians-Univ., Munchen, Germany
Abstract :
Sophisticated high frequency signal processing as well as sensor applications based on surface acoustic waves (SAW) often require a complex transducer layout. We present a simple numerical technique based on a Huygens-type construction to calculate acoustic wave fields for an arbitrary given transducer layout. Approximating the slowness curve of different substrate materials by a parabolic function, we calculate the SAW far field with superposition of circular waves emitted by distributed point sources. Our numerical results for different transducer geometries are in excellent agreement with measurements of the acoustic wave field by an X-ray topographic technique
Keywords :
acoustic field; surface acoustic wave sensors; surface acoustic wave signal processing; surface acoustic wave transducers; Huygens-type construction; SAW far field; X-ray topographic technique; acoustic wave field; acoustic wave fields; circular waves; complex surface acoustic wave fields; distributed point sources; high frequency signal processing; parabolic function; sensor applications; slowness curve; substrate materials; superposition; transducer geometries; transducer layout; Acoustic beams; Acoustic transducers; Acoustic waves; Anisotropic magnetoresistance; Fingers; Frequency; Geometrical optics; Geometry; Structural beams; Surface acoustic waves;
Conference_Titel :
Ultrasonics Symposium, 2000 IEEE
Conference_Location :
San Juan
Print_ISBN :
0-7803-6365-5
DOI :
10.1109/ULTSYM.2000.922540
