Abstract
The existence of an intersection point of electric field strength dependencies of permittivity of ferroelectrics at different temperatures is theoretically described by Ginzburg-Devonshire (GD) theory and experimentally confirmed by studying (Ba 0.3Sr 0.7)TiO 3 (BSTO) and SrTiO 3 (STO) thin film varactors. GD analysis enables one to propose a way to improve the thermal stability of ferroelectric microwave devices. In particular, parameters of a L-band digital (0°/180°) phase-shifter fabricated from thick BSTO film varactors were stabilized in the temperature range T = (210-310) K by application of variable to DC control voltages.
Original language | American English |
---|---|
Pages (from-to) | 1337-1345 |
Number of pages | 9 |
Journal | Integrated Ferroelectrics |
Volume | 58 |
DOIs | |
State | Published - 2003 |
NREL Publication Number
- NREL/JA-520-36016
Keywords
- Ferroelectric film
- Permittivity
- Phase shifter
- Thermal stabilization
- Tunability