%0 Conference Paper
%K thin films
%K Ferroelectric materials
%K Computer simulation
%K Permittivity
%K Electric field effects
%K Barium compounds
%K Magnesia
%K Barium strontium titanate
%K Ferroelectric thin film
%K Ferroelectric tunable microstrip Lange coupler
%K K-band
%K Waveguide couplers
%A G Subramanyam
%A F.A Miranda
%A R.R Romanofksy
%A F.W Van Keuls
%A C.L Canedy
%A S Aggarwal
%A T Venkatesan
%A Ramamoorthy Ramesh
%B IEEE MTT-S International Microwave Symposium Digest
%D 2000
%G eng
%P 1363-1366
%T Ferroelectric tunable microstrip Lange coupler for K-band applications
%V 3
%X We report on the modeled and experimentally verified performance of a gold/Ba0.6Sr0.4TiO3 (BSTO) ferroelectric/magnesium oxide (MgO) two-layered microstrip electrically tunable Lange coupler. Tight coupling of 3 dB or higher was obtained over a frequency range of 14 to 19 GHz. The coupled power level was electrically tunable from -11.5 to -5.5 dB at 20 GHz with an applied dc electric field of 1.6 V/μm. This work demonstrates another advantageous application for ferroelectric thin-films in passive microwave components at K-band frequencies.