Patent ID: 7486159

Claim:
A surface acoustic wave device comprising: a substrate; a plurality of terminals disposed on the substrate and including at least an unbalanced terminal and two balanced terminals; at least two surface acoustic wave elements disposed on the substrate between the unbalanced terminal and the balanced terminals; and a plurality of signal lines connected to the at least two surface acoustic wave elements; wherein at least two of the plurality of signal lines connected to the at least two surface acoustic wave elements intersect one another with an insulating film disposed therebetween; one of the at least two surface acoustic wave elements defines a first element that is connected to the unbalanced terminal and to a ground pad; another of the at least two surface acoustic wave elements defines a second element; at least two of the plurality of signal lines define signal wirings arranged to connect the second element to the first element; at least one of the plurality of signal lines defines a ground wiring arranged to connect the first element to the ground pad; at least one of the signal wirings and the ground wiring intersect with the insulating film disposed therebetween; the ground pad is disposed outside of an area enclosed by the first element, the second element and the signal wirings; and the ground wiring includes a first layer which is not disposed in the vicinity of the insulating film and a second layer which is disposed in the vicinity of the insulating film.