Title :
Ferroelectric films in microwave technique: physics, characterization, and tunable devices
Author_Institution :
St. Petersburg Electrotech. Univ., Russia
Abstract :
The aim of investigations of barium-strontium titanate solid solution BaxSr1-xTiO3 BSTO films and ceramic layers is a realization of tunable components for microwave tunable filters and microwave tunable phase shifters for steerable antenna arrays. The experiment with a tunable resonator on a strontium titanate (STO) single crystal is also discussed. The conducting plates of the resonator are performed from YBCO epitaxial films. The high-temperature superconductors (HTS) plates make possible to apply the biasing voltage to the (STO) resonator. The dielectric response of ferroelectric materials strongly depends on temperature. In this connection, one of the intriguing characteristics of the ferroelectric tunable devices is the range of operational temperature.
Keywords :
barium compounds; dielectric resonators; ferroelectric ceramics; ferroelectric thin films; high-temperature superconductors; microwave filters; microwave phase shifters; permittivity; strontium compounds; superconducting epitaxial layers; yttrium compounds; BaxSr1-xTiO3; YBa2Cu3O7-δ-SrTiO3-YBa2Cu3O7-δ; antenna arrays; barium-strontium titanate solid solution; biasing voltage; ceramic layers; dielectric properties; ferroelectric films; ferroelectric materials; ferroelectric tunable devices; high-temperature superconductor plates; microelectro mechanical structures; microwave loss; microwave tunable filters; permittivity; phase shifters; tunable devices; Ferroelectric films; High temperature superconductors; Microwave antenna arrays; Microwave devices; Microwave theory and techniques; Phased arrays; Physics; Strontium; Superconducting microwave devices; Titanium compounds;
Conference_Titel :
Physics and Engineering of Microwaves, Millimeter, and Submillimeter Waves, 2004. MSMW 04. The Fifth International Kharkov Symposium on
Print_ISBN :
0-7803-8411-3
DOI :
10.1109/MSMW.2004.1345789
