Analysis of saw propagation under a periodic multi-electrode-type grating

Abstract

A general approach is proposed to model complicated cells, made of an arbitrary number of electrodes and electrical ports. Simulations are based on a periodic FEM/BEM analysis, and emphasis is put on the study of one wavelength long cell. The proposed method is applied to well known basic cells and Rayleigh waves for validation, and comparisons to experimental results are given. Using this approach, propagation losses due to bulk radiation in DART cells are evaluated. Finally, discussion is opened about the phase references required for accurate simulation of complicated cells showing directivity in a non- periodic environment.