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A surface acoustic wave device which includes a piezoelectric substrate, and an interdigital transducer formed on a planar surface of the piezoelectric substrate, and having first and second bus bars, a first plurality of electrode fingers connected to the first bus bar, and a second plurality of el

A surface acoustic wave device which includes a piezoelectric substrate, and an interdigital transducer formed on a planar surface of the piezoelectric substrate, and having first and second bus bars, a first plurality of electrode fingers connected to the first bus bar, and a second plurality of electrode fingers connected to the second bus bar. The first and second plurality of electrode fingers of the interdigital transducer have an electrode cross region in which the first and second plurality of electrode fingers are arranged alternatively. Each boundary between the first and second bus bars and a grating region of the first and second plurality of electrode fingers is arranged such that the boundary is not substantially parallel, with a transmission direction of surface acoustic waves excited by the interdigital transducer.

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1. A surface acoustic wave device comprising:a piezoelectric substrate; and an interdigital transducer formed on a planar surface of said piezoelectric substrate, said interdigital transducer having first and second bus bars, and a first and a second plurality of rectilinear and mutually parallel el

1. A surface acoustic wave device comprising:a piezoelectric substrate; and an interdigital transducer formed on a planar surface of said piezoelectric substrate, said interdigital transducer having first and second bus bars, and a first and a second plurality of rectilinear and mutually parallel electrode fingers connected to said first and second bus bars respectively wherein said first and second plurality of electrode fingers of said interdigital transducer have an electrode cross region in which said first and second plurality of electrode fingers are arranged alternatively; and each of boundary lines between said first and second bus bars and a grating region composed of said first and second plurality of electrode fingers is arranged such that each of said boundary lines is not substantially parallel, with respect to a transmission direction of surface acoustic waves excited by said interdigital transducer.