Doubly Rotated Cut SAW Devices.
Final rept. 15 Aug 79-15 Aug 81,
MOTOROLA INC SCOTTSDALE AZ GOVERNMENT ELECTRONICS DIV
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The objective of this program is the exploratory development of doubly rotated cuts of quartz possessing superior Surface Acoustic Wave SAW properties for applications involving environmentally hardened devices. The key properties examined and optimized both theoretically and experimentally are first, second and third order Temperature Coefficients of Delay TCD, piezoelectric coupling factor, power flow angle, Bulk Acoustic Wave BAW inverse velocity surfaces, degeneracies and leaky waves, and sensitivities of the above quantities to misorientations and manufacturing tolerances. The program consists of two major task areas comprising an interactive numericalexperimental approach. Task I involves the numerical computation of the key SAW Properties for doubly rotated quartz substrates for the purpose of locating promising angular ranges with properties superior to the singly rotated cuts now in existence.
- Line, Surface and Bulk Acoustic Wave Devices