Patent ID: 6703760
Filing Date: 2004-03-09
Classification: H03H

Abstract:
A surface acoustic wave device comprisinga piezoelectric substrate, at least two first interdigital transducers provided on a surface of the piezoelectric substrate; at least two second interdigital transducers provided on the surface of the piezoelectric substrate; and a coupler having a plurality of metal strips and disposed on the piezoelectric substrate, the coupler located between a pair of said at least two first interdigital transducers, and between a pair of said at least two second interdigital transducers so as to be adjacent to the first and second interdigital transducers; wherein the surface acoustic wave device operates using a shear horizontal surface acoustic wave and the coupler transmits shear horizontal surface acoustic waves without reflecting the shear horizontal surface acoustic waves; and said piezoelectric substrate includes a first edge and a second edge that reflect the shear horizontal surface acoustic waves transmitted by the coupler.