Title :
A ferroelectric tunable microstrip Lange coupler for K-band applications
Author :
Subramanyam, G. ; Miranda, F.A. ; Romanofsky, R.R. ; Van Keuls, F.W. ; Canedy, C.L. ; Aggarval, S. ; Venkatesan, T. ; Ramesh, R.
Author_Institution :
Dept. of Electr. Comput. Eng., Dayton Univ., OH, USA
Abstract :
We report on the modeled and experimentally verified performance of a gold/Ba/sub 0.6/Sr/sub 0.4/TiO/sub 3/ (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//spl mu/m. This work demonstrates another advantageous application for ferroelectric thin-films in passive microwave components at K-band frequencies.
Keywords :
Barium compounds; Ferroelectric devices; Ferroelectric thin films; Gold; Magnesium compounds; Microstrip couplers; Strontium compounds; 14 to 19 GHz; Au-Ba/sub 0.6/Sr/sub 0.4/TiO/sub 3/-MgO; K-band applications; applied dc electric field; coupled power level; ferroelectric thin-films; ferroelectric tunable microstrip Lange coupler; passive microwave components; two-layered microstrip device; Conductors; Dielectric losses; Dielectric substrates; Ferroelectric materials; Fingers; Frequency; K-band; Microstrip; Thin films; Titanium compounds;
Conference_Titel :
Microwave Symposium Digest. 2000 IEEE MTT-S International
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-7803-5687-X
DOI :
10.1109/MWSYM.2000.861794
