Title :
Tunable microwave filters using ferroelectric materials
Author :
Vendik, Irina ; Vendik, Orest ; Pleskachev, Vladimir ; Nikol´ski, M.
Author_Institution :
Dept. of Microelectron. & Radio Eng., St.-Petersburg Electrotech. Univ., Russia
fDate :
6/1/2003 12:00:00 AM
Abstract :
A new design approach for a microstrip tunable filter on a two-layered substrate with BSTO thin films is suggested. The coupling factor of a ferroelectric capacitor connected to the microstrip resonators of the filter is considered to make possible the design of the filter with constant pass band width while tuning. Results of the filter characteristic simulation and measurement are presented. Tunable coplanar resonator on single crystal STO disk is also considered.
Keywords :
band-pass filters; barium compounds; circuit tuning; ferroelectric capacitors; ferroelectric thin films; microstrip filters; microstrip resonators; microwave filters; resonator filters; strontium compounds; BSTO thin film; BaSrTiO3; STO single crystal disk; SrTiO3; band-pass filter; coplanar resonator; coupling factor; ferroelectric capacitor; ferroelectric material; microstrip resonator; tunable microwave filter; two-layered substrate; Band pass filters; Capacitors; Ferroelectric films; Ferroelectric materials; Microstrip components; Microstrip filters; Microstrip resonators; Microwave filters; Q factor; Resonator filters;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2003.814013
