Title :
Measurements of SAW effective velocity angular-variation under metal strip gratings and their application to ASPW analysis
Author :
Hikino, Osamu ; Ikeda, Hiroaki ; Shiba, Takashi ; Yuhara, Akitsuna
fDate :
Oct. 31 1994-Nov. 3 1994
Abstract :
Measurements of SAW effective velocity angular-variation under metal strip gratings, using a comb-filter method are described. A distinctive characteristic was newly observed at higher frequency; the minimum observed at propagation angle 0° of the above angular-variation of LiNbO3-128° rotYX single crystal. The minimum is originated by SAW dispersion considered to be mainly due to stored energy effect. Moreover, as an example to utilize the above measurement results for an analysis of SAW second order effects, the frequency response of a 480 MHz SAW filter was calculated including SAW diffraction effect using angular spectrum of plane wave (ASPW) method. The simulation result was in good agreement with the experimental one
Keywords :
acoustic wave diffraction; digital simulation; frequency response; lithium compounds; piezoelectric materials; surface acoustic wave filters; 480 MHz; LiNbO3; SAW diffraction effect; SAW dispersion; SAW effective velocity angular-variation; SAW second order effects; angular spectrum; angular-variation; comb-filter method; frequency response; metal strip gratings; plane wave method; simulation; stored energy effect; Acoustic diffraction; Comb filters; Lithium materials/devices; Piezoelectric materials/devices; Surface acoustic wave filters;
Conference_Titel :
Ultrasonics Symposium, 1994. Proceedings., 1994 IEEE
Conference_Location :
Cannes, France
Print_ISBN :
0-7803-2012-3
DOI :
10.1109/ULTSYM.1994.401593
