Surface acoustic wave filter
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United States of America Patent
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Jun 23, 1998
Issued Date -
N/A
app pub date -
Jun 27, 1996
filing date -
Jul 8, 1993
priority date (Note) -
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Abstract
A surface acoustic wave (SAW) filter includes a plurality of interdigital transducers located on a piezoelectric substrate along a surface wave propagation direction, at least a single one-port SAW resonator being connected in parallel with an output side of the SAW filter, while the resonance frequency (f.sub.0) of the SAW resonator is set in frequency region level which is lower than the pass band of the SAW filter.
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