Title :
A 310° K-band phaseshifter using tunable BaSrTiO3 interdigitated capacitors
Author :
Vélu, G. ; Blary, K. ; Burgnies, L. ; Carru, J.C. ; Delos, E. ; Marteau, A. ; Lippens, D.
Author_Institution :
LEMCEL, Univ. du Littoral-Cote d´´Opale, Calais, France
Abstract :
BaSrTiO3 thin films were deposited by low-cost sol-gel techniques and exhibit relative permittivity of 300 and loss tangent of 0.012 with a roll off above 5 GHz. Subsequently the films were used for fabricating coplanar waveguide phaseshifters using tunable finger-shaped capacitors. A 310° phaseshift was thus obtained at 30 GHz and 35 V of tuning voltage with 3.6 dB of insertion loss yielding a figure of merit of 85°/dB.
Keywords :
barium compounds; capacitors; coplanar waveguide components; microwave phase shifters; sol-gel processing; strontium compounds; thin film devices; 3.6 dB; 30 GHz; 310° k-band phaseshifter; 35 V; BaSrTiO3; coplanar waveguide phaseshifters; insertion loss; low-cost sol-gel techniques; tunable finger-shaped capacitors; tunable interdigitated capacitors; Binary search trees; Capacitors; Dielectric loss measurement; Ferroelectric films; Ferroelectric materials; Frequency measurement; K-band; Permittivity; Sputtering; Voltage;
Conference_Titel :
Microwave Conference, 2005 European
Print_ISBN :
2-9600551-2-8
DOI :
10.1109/EUMC.2005.1608942
