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Two different devices topology are proposed to implement parallel-plate capacitors using Ba0.6Sr0.4TiO3 (BST) thin films. At 1 MHz frequency, the maximum tunability 1.3:1 is obtained with 32 V DC bias. The new topology capacitors have much higher tunability compared with conventional capacitors at the same total capacitance. Phase shifters, which are loaded variable structure capacitors have also been implemented. The circuits provide a maximum 190° and 262° phase shift at 18 GHz at room temperature.
References
-
-
1)
-
Van Keuls, F.W., Mueller, C.H., Miranda, F.A., Romanovsky, R.R., Canedy, C.L., Aggarwal, S., Venkatesan, T., Ramesh, R., Horwitz, J.S., Chang, W., Kim, W.: `Room temperature thin film Ba', IEEE MTT-S Int. Microw. Symp. Dig., June 1999, Anaheim, CA, USA, Anaheim Convention Centre,.
-
2)
-
A. Tombak ,
J. Maria ,
F.T. Ayguavives ,
J. Zhang ,
G.T. Stauf ,
A.I. Kingon ,
A. Mortazawi
.
Tunable barium strontium titanate thin film capacitors for RF and microwave applications.
IEEE Microw. Wirel. Compon. Lett.
,
1 ,
3 -
5
-
3)
-
B. Acikel ,
T.R. Taylor ,
P.J. Hansen ,
J.S. Speck ,
R.A. York
.
A new high performance phase shifter using (Ba; Sr)TiO3thin films.
IEEE Microw. Wireless Compon. Lett.
,
7 ,
237 -
239
-
4)
-
F. De Flaviis ,
N.G. Alexopoulos ,
O.M. Stafsudd
.
Planar microwave integrated phase shifter design with high purity ferroelectric material.
IEEE Trans. Microw. Theory Tech.
,
963 -
969
-
5)
-
L.-Y. Chen ,
R. Forse ,
D. Chase ,
R. York
.
Analog tunable matching network using integrated thin-film BST capacitors.
IEEE MTT-S Int. Microw. Symp. Dig.
,
261 -
264
-
6)
-
A. Tombak ,
J.-P. Maria ,
F.T. Ayguavives ,
J. Zhang ,
G.T. Stauf ,
A.I. Kingon ,
A. Mortazawi
.
Voltage-controlled RF filters employing thin-film barium–strontium–titanate tunable capacitors.
IEEE Trans. Microw. Theory Tech.
,
2 ,
462 -
467
-
7)
-
B. Acikel ,
Y. Liu ,
A.S. Nagra ,
T.R. Taylor ,
P.J. Hansen ,
J.S. Speck ,
R.A. York
.
Phase-shifters using BaSrTiO3thin films on sapphire and glass substrate.
IEEE MTT-S Int. Microw. Symp. Dig.
,
1191 -
1194
http://iet.metastore.ingenta.com/content/journals/10.1049/el.2010.3538
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content/journals/10.1049/el.2010.3538
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