Abstract
It is an essential feature in surface acoustic wave(SAW) device applications to know the propagation characteristics. In this paper, the characteristics of Rayleigh waves on LiTaO_3 are computed by changing arbitrarily both cut and propagation direction. The results are shown in a set of maps of equal velocity, equal power flow angle, equal electro-mechanical coupling constant and equal temperature coefficient of delay time. From these maps it is possible to know the characteristics of SAW propagation for every substrate with arbitrary cut and propagation direction. Therefore these maps are very useful for the selection of new substrate of LiTaO_3. Also the computed results of temperature coefficients for X-cut, Y-cut and Z-cut LiTaO_3 are compared with the reported experimental values, and these are in good agreement with each other.
