A discrete Green's function is derived for surface acoustic wave device analysis, giving the currents in an infinite array of regular electrodes when a voltage is applied to one electrode. Simple formulas are obtained by using the quasi-static approximation, which assumes the frequency to be such that electrode reflections are insignificant. The function exhibits distortion associated with the nonuniform charge distribution, and is shown to be causal
Published in:
Microwave Theory and Techniques, IEEE Transactions on
(Volume:49
,
Issue:
4
)
Date of Publication: Apr 2001