Finite Element Analysis in Combination with Perfectly Matched Layer to the Numerical Modeling of Acoustic Devices in Piezoelectric Materials

Dbich Karim, Sylvain Ballandras, Thierry Laroche, Karl Wagner, Jean-Michel Brice, Xavier Perois

Institut Femto-st, Besan?on, France.
TDK, Munich, Germany.
TDK, Sophia Antipolis, France.

DOI: 10.4236/am.2013.45A008                

Abstract

The characterization of finite length Surface Acoustic Wave (SAW) and Bulk acoustic Wave (BAW) resonators is addressed here. The Finite Element Analysis (FEA) induces artificial wave reflections at the edges of the mesh. In fact, these ones do not contribute in practice to the corresponding experimental response. The Perfectly Matched Layer (PML) method, allows to suppress the boundary reflections. In this work, we first demonstrate the basis of PML adapted to FEA formalism. Next, the results of such a method are depicted allowing a discussion on the behavior of finite acoustic resonators.

Keywords

Finite Element Method; Perfectly Matched Layer; Surface Acoustic Wave; Piezoelcetric; Numerical Modeling

Conflicts of Interest

The authors declare no conflicts of interest.

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