Microwave study of tunable planar capacitors using mn-doped Ba0.6Sr0.4Tio3 ceramics.
This paper deals with the microwave study of coplanar tunable capacitors using Mn-doped Ba(0.6)Sr(0.4)TiO(3) ceramics. These ceramics are developed to improve performance at microwave frequencies (i.e., compromise between tuning capabilities and insertion losses). Interdigitated capacitors were first fabricated on thick Mn-doped BST ceramics. The capacitors showed reduced tuning factor because of a parasitic capacitance between the contact pads. The use of Mn-doped BST/ SiO(2) bilayers led to a significant enhancement of the capacitor performance (57% of agility under 200 V at 1 GHz).
Laur
Vincent
V
Research Institute XLIM UMR 6172, Universite de Limoges/Centre National de la Recherche Scientifique, Limoges, France.
Costes
Romain
R
Houndonougbo
Fiffamen
F
Madrangeas
Valérie
V
Cros
Dominique
D
Paté
Michel
M
Ganne
Jean-Pierre
JP
D002516:Ceramics / Q000737:chemistry*; D025802:Electric Capacitance; D004581:Electronics / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008422:Materials Testing; D008872:Microwaves