| 摘要 |
PROBLEM TO BE SOLVED: To miniaturize a surface acoustic wave device wherein a plurality of surface acoustic wave elements are connected in parallel relationship and arranged on the same substrate, and to make temperature characteristic superior in wide temperature range. SOLUTION: A plurality of surface acoustic wave elements are arranged so that the respective propagation directionsψare different from each other on a main surface of a quartz plate cut out with Euler angles of (0°, 113-135°,±(40-49°)). When Euler angle is set to (0°,θ,ψ), difference of propagation directions can be made small by setting the respective propagation anglesψto be within the range of 0.3295θ+3.3318°±1.125°. As a result, angle which the surface acoustic wave elements make becomes small, and miniaturization of the surface acoustic wave device is attained. COPYRIGHT: (C)2004,JPO&NCIPI
|
