This thesis presents two approaches to solving the diffraction problem for SAW devices on anisotropic substrates. Diffraction is a nonlinear second-order effect which alters SAW performance, and some of the difficulty in predicting the actual effect is the anisotropy of acoustic materials, which makes the Fresnel Integral solution non-trivial. An accurate model for diffraction effects will allow compensation to be made without iterations in expensive and time consuming fabrication and testing processes, especially since it is difficult to isolate diffraction from other second-order effects. Of the two methods of modelling, one is a Fresnel Integral evaluation approach, and the other rearranges the diffraction integral and takes advantage of symmetries for its solution. The two models are developed and compared, and results are shown for various conditions of interest.
Master of Science (M.S.)
College of Engineering
Length of Campus-only Access
Masters Thesis (Open Access)
Roberts, Melanie A., "Diffraction Modelling for SAW Devices on Anisotropic Substrates" (1987). Retrospective Theses and Dissertations. 5080.