Title :
General-purpose simulator for leaky surface acoustic wave devices based on coupling-of-modes theory
Author :
Hashimoto, Ken-ga ; Yamaguchi, Masatsune
Author_Institution :
Dept. of Electr. & Electron. Eng., Chiba Univ., Japan
Abstract :
The paper describes the development of a general-purpose simulator for high performance leaky surface acoustic wave (LSAW) devices. The derivation of the coupling-of-modes (COM) parameters for the simulator is based on a method developed originally for surface transverse wave devices: the method can skillfully takes the effect of back-scattered bulk acoustic waves into consideration. All the COM parameters for the analysis are determined as a function of electrode thickness, and the simulation itself is carried out in exactly the same may with the conventional COM analysis. A ladder-type LSAW filter on 36°YX-LiTaO 3 and an interdigitated-interdigital transducer type filter employing longitudinal-type LSAWs on (011)-Li2B4O 7 are analysed, which concludes how effectively the developed simulator is applicable to assessing LSAW device performances, present simulator is demonstrated
Keywords :
coupled mode analysis; simulation; surface acoustic wave devices; surface acoustic wave filters; (011)-Li2B4O7; 36°YX-LiTaO3; Li2B4O7; LiTaO3; coupling-of-modes theory; general-purpose simulator; interdigitated-interdigital transducer type filter; ladder-type LSAW filter; leaky surface acoustic wave device; longitudinal-type LSAW; Acoustic transducers; Acoustic waves; Analytical models; Dispersion; Electrodes; Electrons; Filters; Piezoelectric transducers; Surface acoustic wave devices; Surface acoustic waves;
Conference_Titel :
Ultrasonics Symposium, 1996. Proceedings., 1996 IEEE
Conference_Location :
San Antonio, TX
Print_ISBN :
0-7803-3615-1
DOI :
10.1109/ULTSYM.1996.583819
