Surface Acoustic Wave Devices on Frequency Harmonics. Features of Calculating SAW Parameters by the Finite Element Method

This work is devoted to problems arising in calculation of parameters of surface acoustic waves (SAWs) of the main and multiple frequency harmonics using the finite element method. The technique and main features of the SAW analysis by a numerical method are considered. Simple one-wavelength test cells were chosen as the main mode of the study. It is shown that, using these SAW parameters in the analytical modified coupling-of-modes model, one can preliminarily calculate amplitude–frequency responses of SAW devices using higher-order frequency harmonics. The calculation results are compared with experimental measurements of the transfer coefficients of SAW filter and SAW delay line.