Scattering Matrix Analysis of Surface Acoustic Wave Reflectors and Transducers

65 p.Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1980.The phased periodic array scattering parameters {1} have been modified and corrected for use as a single electrode, mixed units, scattering matrix consisting of one electrical and two acoustic ports. These scattering parameter analytical expressions are functions of material constants, electrode geometry, and frequency. The three port single electrode scattering matrices are acoustically cascaded to produce a three port device scattering matrix which takes into account all finger interactions (acoustic and electric) for the combined effects of piezoelectric and mechanical scattering. The analysis agrees well with experimental measurements of input admittance, electro-acoustic transfer function, and acoustic transmission and reflection coefficients as functions of frequency. Analysis results for the complete modeling of transducers with floating electrodes are also presented.U of I OnlyRestricted to the U of I community idenfinitely during batch ingest of legacy ETD