A 2D model for bulk acoustic wave devices using a dyadic Green´s function of laminar plate

We have presented a model dedicated to the simulation of acoustic devices built on laminar plates. The important aspect of this model is that it is based on the computation of a spatial Green´s function which can be completely derived as spectral variables (slowness and angular frequency) are always separated and its singular behavior always integrable. Once this function obtained, we have shown how to simulate finite length electrode excitation of bulk waves. Computation delays may be large when computing the spatial Green´s function, but this must be done only once. The spatial Green´s function then can be interpolated, yielding notable computation gain. Consequently, a standard BAW device can be accurately simulated in a few seconds. We intend to extend this model to account for electrode mass loading and eventually to 3D problems.