Mutual admittances of an infinite periodic surface acoustic waves transducer using an original coupled FEM/BIE numerical model

In this paper, mutual admittances of a Surface Acoustic Waves (SAW) transducer, infinitely periodic in one direction, are computed using a new numerical coupled Finite Element Method (FEM) / Boundary Integral Equation (BIE) technique. This coupled FEM/BIE numerical model allows the computation of the harmonic admittance of the transducer. We are going to show that using numerical techniques the mutual admittance of the SAW transducer can be derived from the harmonic admittance. Numerical simulations will be shown for a periodic SAW transducer built on Quartz.