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

Volume

13

Issue

2

fYear

2003

fDate

6/1/2003 12:00:00 AM

Firstpage

716

Lastpage

719

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;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2003.814013

Filename

1211703