| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve the electric characteristics of a SAW device provided with a plurality of SAW elements, and to prevent coupling between the SAW elements. <P>SOLUTION: The surface acoustic wave element is equipped with a first surface acoustic wave element part formed on the surface of a piezoelectric substrate and a second surface acoustic wave element part formed on the surface of the piezoelectric substrate adjacently to the first surface acoustic wave element part, wherein the first surface acoustic wave element part and the second surface acoustic wave element part both include a signal input terminal, a signal output terminal, a ground terminal, a signal path connecting the signal input terminal to the signal output terminal, a serial arm resonator serially connected onto the signal path, a branch path branched from the signal path to reach the ground terminal, and a parallel arm resonator connected onto the branch path. The signal path of at least one of the first surface acoustic wave element part and the second surface acoustic wave element part is arranged on the outer side from the center line of the surface acoustic wave element part. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
