Abstract :
The effective permittivity is widely used to compute the Green´s function for SAW and leaky wave devices. In general, the effect of mass loading due to surface electrodes is ignored, and a single Green´s function is obtained. In this paper, we examine a method, based on previous work by Adler and Peach, in which additional Green´s function components describe the effects of T13, T23 and T 33 stresses and the electrical displacement D on each of the u1, u2, u3 displacements and on the electrical potential φ. The sixteen-element Green´s functions for representative SAW (ST-X quartz) and leaky wave (64° lithium niobate) substrates are presented
Keywords :
Green´s function methods; lithium compounds; permittivity; quartz; surface acoustic wave devices; Dyadic Greens functions; Greens function; LiNbO3; SAW devices; ST-X quartz; SiO2; effective permittivity; electrical displacement; electrical potential; leaky wave devices; lithium niobate; mass loading; stresses; surface electrodes; Acoustic transducers; Acoustic waves; Electric potential; Electrodes; Green´s function methods; Lithium niobate; Maxwell equations; Permittivity; Stress; Surface acoustic waves;
