Saw resonator
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United States of America Patent
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-
Nov 25, 2008
Grant Date -
Mar 1, 2007
app pub date -
Aug 17, 2006
filing date -
Aug 25, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A surface acoustic wave (SAW) resonator, including: a first interdigital transducer composed of a pair of interdigital electrodes provided in a propagation direction of a surface acoustic wave; a second interdigital transducer composed of a pair of interdigital electrodes provided in parallel to the first interdigital transducer; and a switch that alternately switches the pair of interdigital electrodes of the first interdigital transducer and the pair of interdigital electrodes of the second interdigital transducer; wherein 7.lamda..ltoreq.B.ltoreq.33.lamda. where .lamda. is a wavelength of a surface acoustic wave, and B is an addition of a width a1 of an engaged section of electrode fingers of the first interdigital transducer, a width a2 of an engaged section of electrode fingers of the second interdigital transducer, and a distance b between the engaged sections of both interdigital transducers.
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