Patent ID: 7064471

Claim:
A surface acoustic wave (SAW) device comprising: first and second comb-shaped electrodes which are provided axially opposite to each other on a piezoelectric substrate; a pair of first reflectors and a pair of second reflectors which are provided, on the piezoelectric substrate, at opposite sides of the first comb-shaped electrode along propagation direction of a surface wave generated from the first comb-shaped electrode and at opposite sides of the second comb-shaped electrode along a propagation direction of a surface wave generated from the second comb-shaped electrode, respectively, and are electrically isolated from the first and second comb-shaped electrodes, respectively; and a plurality of auxiliary electrodes for surrounding the first and second comb-shaped electrodes, the pair of first reflectors and the pair of second reflectors, which are electrically independent of each other and have different widths locally.