Title :
20 GHz tunable filter based on ferroelectric (Ba,Sr)TiO3 film varactors
Author :
Keis, V.N. ; Kozyrev, A.B. ; Khazov, M.L. ; Sok, J. ; Lee, J.S.
Author_Institution :
Microwave Cryoelectron. Lab., St. Petersburg Electrotech. Univ., Russia
fDate :
5/28/1998 12:00:00 AM
Abstract :
The tunability and dielectric losses of ferroelectric (Ba,Sr)TiO 3 film varactors were measured under DC voltage at microwave frequencies (~20 GHz). A new microwave two-pole tunable waveguide filter containing four ferroelectric (Ba,Sr)TiO3 film varactors was designed and tested. The frequency tuning of the filter results from the variation in capacitance of ferroelectric varactors with DC controlling voltage
Keywords :
barium compounds; circuit tuning; dielectric losses; ferroelectric thin films; microwave filters; strontium compounds; varactors; waveguide filters; (BaSr)TiO3; 20 GHz; DC controlling voltage; DC voltage; capacitance variation; dielectric losses; ferroelectric film varactors; frequency tuning; microwave frequencies; tunable filter; two-pole waveguide filter;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19980784