Elastic wave control element using piezoelectric materials
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United States of America Patent
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-
Apr 15, 2003
Grant Date -
Feb 21, 2002
app pub date -
Aug 8, 2001
filing date -
Aug 10, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An elastic wave control element includes a piezoelectric material which is inserted into a propagation path for an elastic wave or installed in an oscillator to allow the elastic wave in a selected frequency to be damped, reflected, or transmitted. The piezoelectric material is provided with a pair of electrodes between which a negative capacitance circuit is connected to allow a loss factor of the negative capacitance circuit in a selected frequency or frequency band to be matched with a dielectric loss factor of the piezoelectric material.
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