Title :
Analysis of the complete spectrum of acoustic waves on 36° rot YX-LiTaO3 by means of Wigner distribution
Author :
Dill, R. ; Kappacher, C.
Author_Institution :
Siemens AG, Munich, Germany
Abstract :
The complete spectrum of acoustic waves on 36° rot YX-LiTaO 3 is analyzed. To this end, the transfer function of a delay line on this substrate at the fundamental (265 MHz) and at the third harmonic frequency (795 MHz) is measured. These filter characteristics are analyzed by means of a mixed time/frequency representation, the smoothed pseudo-Wigner distribution (SPWD). The SPWD has been proven to be well suited for identifying all coupled acoustic waves, for calculating their velocities, and for delineating their trajectories
Keywords :
lithium compounds; surface acoustic wave filters; surface acoustic waves; transfer functions; transient response; ultrasonic delay lines; ultrasonic velocity; 265 MHz; 795 MHz; LiTaO3 substrate; SAW filters; acoustic wave spectrum; acoustic wave trajectory delineation; acoustic wave velocity; coupled acoustic waves; delay line; filter characteristics; impulse response; mixed time/frequency representation; smoothed pseudo-Wigner distribution; third harmonic frequency; transfer function; Acoustic transducers; Acoustic waves; Delay lines; Filters; Geometry; Metallization; Surface acoustic waves; Surface treatment; Transfer functions; Ultrasonic transducers;
Conference_Titel :
Ultrasonics Symposium, 1990. Proceedings., IEEE 1990
Conference_Location :
Honolulu, HI
DOI :
10.1109/ULTSYM.1990.171340
