SAW Velocity Calculations from a Unit Cell Model
Application ID: 107661
FEM simulation can be used to obtain a SAW velocity and some related parameters (squared electromechanical coupling coefficient, reflectivity, etc.) for different typical configurations. Such parameters are input data for various analytical and semi-analytical methods of SAW device design, like the Delta-Function model, the COM method, etc.
A unit cell model with periodic conditions and the Eigenfrequency study is the typical setup. In this entry, the unit cell for a center frequency of about 433 MHz on 128ᵒ YX cut LiNbO3 crystal with aluminum IDTs is investigated.
Three configurations are shown:
- Free surface case: No IDT, no electric terminals
- IDT case: Two typical aluminum grounded electrodes
- Grounded surface case: No IDT, the fully grounded surface
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