Surface acoustic wave device capable of suppressing spurious response due to non-harmonic higher-order modes
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United States of America Patent
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Feb 12, 2002
Grant Date -
N/A
app pub date -
Jan 27, 2000
filing date -
Jan 27, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
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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