Title :
Acoustic-surface-wave properties of Bi12SiO20 and related compounds
Author :
Pratt, R.G. ; Simpson, G. ; O´Connor, C.W.
Author_Institution :
Mullard Research Laboratories, Redhill, UK
Abstract :
Surface-wave velocities and electromechanical-coupling coefficients on the three principal planes of Bi12SiO20 are presented as a function of the propagation direction. The measured values show that Bi12SiO20 is a more useful material for acoustic-surface-wave devices than the better known Bi12GeO20. It has a higher electromechanical-coupling coefficient, so that devices made with it have a lower untuned insertion loss.
Keywords :
acoustic surface wave devices; acoustic surface waves; acoustoelectric effects; bismuth compounds; piezoelectric materials; piezoelectricity; Bi12SiO20; acoustic surface wave devices; acoustic surface waves; bismuth compounds; electromechanical coupling coefficients; piezoelectric materials; piezoelectricity;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19740293
