Dyadic Green's functions for SAW and leaky wave devices

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 T/sub 13/, T/sub 23/ and T/sub 33/ stresses and the electrical displacement D on each of the u/sub 1/, u/sub 2/, u/sub 3/ displacements and on the electrical potential /spl phi/. The sixteen-element Green's functions for representative SAW (ST-X quartz) and leaky wave (64/spl deg/ lithium niobate) substrates are presented.