Tuneable microwave devices including fringe effect capacitor incorporating ferroelectric films
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United States of America Patent
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Feb 24, 1998
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N/A
app pub date -
Jun 7, 1995
filing date -
Dec 1, 1992
priority date (Note) -
Expired
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Abstract
The present invention relates to a tuneable fringe effect capacitor for conducting radio frequency energy. The capacitor includes a thin film of ferroelectric material, a pair of films of a conductive material deposited on the ferroelectric film with a gap between the films, and a substrate for the ferroelectric material and the conductive films. The capacitance value across the gap is varied by applying a voltage to the ferroelectric material and thereby altering the dielectric constant of the ferroelectric material.
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