Patent ID: 6147855
Filing Date: 2000-11-14
Classification: H01G

Abstract:
A variable capacitor, comprising:at least two coplanar, electroconductive members having at least one coplanar, dielectric member therebetween to electrically isolate said electroconductive members to form a capacitor plate;a fixed set of at least one of said capacitor plates, each electroconductive member of which is adapted to be separately electrically connected to an electrical circuit; anda movable group having at least one member comprising at least two coplanar electroconductive areas with at least one coplanar, dielectric area therebetween to electrically isolate said electroconductive areas, said movable group positioned to, and insulated from, said fixed set of capacitor plates, said movable group being adapted for rotation of 90.degree. or less about an axis perpendicular to a surface plane of said first set of plates to vary an amount by which said electroconductive areas of said movable group overlap the surface plane of both of said coplanar, electrically electroconductive members of said fixed set of capacitor plates, to provide variable capacitive coupling therebetween, wherein full variation in capacitive coupling is provided with 90.degree. or less rotation of said movable group about said axis.