Patent ID: 8531255

Claim:
A two-track surface acoustic wave (SAW) device comprising: a substrate; a first SAW track disposed on the substrate, such that the first SAW track has a first acoustic cavity; a second SAW track disposed on the substrate and comprising an interconnecting grating, such that the second SAW track has a second acoustic cavity, which is divided into two acoustic cavities by the interconnecting grating, wherein the two acoustic cavities are acoustically coupled to one another; a first re-radiation interconnection disposed on the substrate and electrically coupling the first SAW track to the second SAW track; a second re-radiation interconnection disposed on the substrate and electrically coupling the first SAW track to the second SAW track; and wherein a length of the interconnecting grating is between about sixteen wavelengths and about thirty wavelengths of a surface acoustic wave of the two-track SAW device.