Ferroelectric tunable microstrip Lange coupler for K-band applications

Publication Type:

Conference Paper

Authors:

G. Subramanyam; F.A. Miranda; R.R. Romanofksy; F.W. Van Keuls; C.L. Canedy; S. Aggarwal; T. Venkatesan; Ramamoorthy Ramesh

Source:

IEEE MTT-S International Microwave Symposium Digest, Volume 3, p.1363-1366 (2000)

Keywords:

Barium compounds, Barium strontium titanate, Computer simulation, Electric field effects, Ferroelectric materials, ferroelectric thin film, Ferroelectric tunable microstrip Lange coupler, K-band, Magnesia, Permittivity, thin films, Waveguide couplers

Abstract:

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.

Notes:

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