| 摘要 |
PURPOSE:To make the decision of the reflecting coefficient of the resonator and the transfer coefficient independently of each other by selecting the distance between the center of a finger unit arranged at the outermost side and a reflected end face to an integral number of multiple of nearly 1/2 of the resonance wavelength of a surface acoustic wave. CONSTITUTION:A transducer 4 is provided on a lithium tantalate substrate 3 in a surface acoustic wave resonator of the strip type utilizing the surface acoustic wave resonator of an SH (shear holizontal) type and having a reflected plane provided along with a face orthogonal to the propagating direction of the resonated surface acoustic wave. Further, the distance A is prolonged by selecting the distance A between the center of the finger unit provided at the outermost side and the reflected end face to an integral number of multiple of nearly 1/2 of the resonated surface acoustic wave. Thus, in dicing the reflected end face, the possibility of damaging the finger unit is precluded and the decision of the transfer coefficient of the transducer and that of the resonator are made independent freely. |
