Patent ID: 7453334

Claim:
A surface acoustic wave (SAW) filter having at least one resonator, the resonators comprising: a piezoelectric substrate having a surface supporting SAW propagation therewith; transversely opposing first and second bus bars longitudinally disposed on the surface; a plurality of grating pads transversely extending inwardly along the surface from each of the first and second opposing bus bars; a plurality of interdigital transducer electrodes disposed along a longitudinal axis on the surface for defining an acoustic aperture across overlapping interdigital transducer electrodes within a transverse dimension thereof, wherein each of the plurality of interdigital electrodes extends from one of the plurality of grating pads, and wherein a metalization ratio for the plurality of grating pads is substantially different from a metalization ratio for the plurality of interdigital transducer electrodes, wherein a height dimension of the grating pads is different than a height dimension of the interdigital transducer electrodes; and a plurality of reflector electrodes disposed on the surface of the piezoelectric substrate on opposing longitudinal sides of the plurality of interdigital electrodes.