Surface acoustic wave filter
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United States of America Patent
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Sep 12, 2006
Grant Date -
Mar 24, 2005
app pub date -
Sep 14, 2004
filing date -
Sep 19, 2003
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A surface acoustic wave filter with little electromagnetic coupling between wires and improved attenuation characteristics is provided. This surface acoustic wave filter comprises: a package having a concavity in the shape of stairs made by laminating dielectrics, a surface acoustic wave element provided on the bottom face of the concavity, a plurality of wires for connecting between a plurality of electrodes provided on the surface of the surface acoustic wave element and a plurality of electrodes provided on one same plane portion of the stairs of the package in correspondence to a plurality of electrodes, and a dummy wire provided between the wires.
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