Patent ID: 7518470
Filing Date: 2009-04-14
Classification: H03H

Abstract:
1. A surface acoustic wave element comprising: a piezoelectric substrate; and a plurality of IDT electrodes of an odd number not less than three, wherein the plurality of IDT electrodes are formed along a propagation direction of surface acoustic waves propagating on the piezoelectric substrate, wherein a first IDT electrode and a second IDT electrode are disposed on both sides of a third IDT electrode, wherein the third IDT electrode is located at the center of the plurality of IDT electrodes, wherein the first IDT electrode is connected to a first reference potential terminal and the second IDT electrode is connected to a second reference potential terminal, and the first and second reference potential terminals are formed asymmetrically with respect to a virtual central axis that passes through the center of the third IDT electrode and provided in a direction perpendicular to the propagation direction, wherein the magnitudes of inductance components generated at the first and second reference potential terminals are not less than 0.1 nH and not more than 0.3 nH.