A new approach to broadband SAW diffraction theory

The authors describe an innovative technique for determining a two-dimensional impulse response diffraction model for a SAW (surface acoustic wave) device from the wave equation using an impulse driver. The approach presented is unique in that it determines the point-to-point impulse response for the isotropic case using the basic wave equation of motion, and utilizes a double integral reduction technique to determine the tap-to-tap response. This takes into account diffraction effects, and provides an impulse response which is valid for the broadband case. Results of the analysis are presented for both the isotropic and anisotropic case