Ferroelectric materials and applications?

Hi All,

Can anyone direct me to information about ferroelectric materials
for microwave/antenna applications ?

Anything will help - Basics, Analysis, applications etc.

Tnx alot,
P.

Ferroelectrics (BST-based) are claimed for tunable components in microwave: tunable filters, tunable phase shifters, tunable antennas, etc.

Here some related links:
http://www.paratek.com/

http://www.agilematerials.com/

http://www.ngimat.com/rf/index.html

If you have more detailed questions, feel free to ask.
Several IEEE articles exists about this topic.