Development of Circuit Models for SAW Resonators.
Final technical rept. 29 Oct 76-31 Jan 78,
TEXAS INSTRUMENTS INC DALLAS CENTRAL RESEARCH LABS
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Three approaches for calculating the surface acoustic wave SAW velocity in the periodic reflector array of a SAW resonator have been undertaken. A theoretical model of the velocity in the array could be used to improve existing resonator models and thus to improve device performance. All three approaches involve approximate theoretical calculations. The first two approaches--a variational method and a perturbation theory--were not sufficiently accurate in their simplest implementation. More accurate field approximations than those previously available are needed to give the required accuracy. A finite element calculation aimed at obtaining better field estimates has been completed. The only step remaining when the contract terminated was the utilization of the more accurate field approximations obtained by the finite element method in an improved perturbation calculation. Author
- Line, Surface and Bulk Acoustic Wave Devices