Creating a SAW Finger Pair using Geometric Shapes

Surface acoustic wave (SAW) filters utilise interdigital transducers on a piezoelectric substrate, where an input transducer converts an electrical signal to an acoustic wave. The propagated mechanical energy is converted back to an electrical signal at the output; the output of the filter is dependent on the frequency response of the device, which OnScale enables engineers to analyse in 3D to determine full device performance.

This video demonstrates how to create a simple 3D model of a SAW device. In it, we have modeled a saw finger pair. SAW devices are usually made up of many of these pairs which create the interdigital transducers (IDTs). 

Note: If you wish to create a full SAW device, you can use OnScale's patterning feature to pattern out this SAW finger pair.

This video covers: 

  • Geometry creation
  • Material assignment
  • Time function definition
  • Mesh settings
  • Pressure loading
  • Outputs requests
  • Simulation set up 
  • Running on the cloud, downloading results and post processing the results