Patent ID: 6914766
Filing Date: 2005-07-05
Classification: G01R,H01G

Abstract:
1. Variable or adjustable capacitor, in particular for high-frequency power filters, substantially comprising on the one hand a first component made of conductive material in the form of an at least partially hollow rod or bar, comprising a hole or perforation extending axially into the body of said first component to form a tube portion and on the other hand, a second component also made of conductive material in the form of a rod able to be fitted to a variable depth into said axial hole, the engagement depth of the second component in the first component determining the degree of capacitive coupling between them and therefore the value of the resulting capacitance, characterised in that the tube portion ( 2 ″) is provided on its internal face, preferably substantially over the whole depth of the axial hole ( 2 ′), with a layer ( 4 ) of dielectric material, the latter preferably extending in a continuous manner over the edge ( 2 ′″) defining the access aperture of said hole ( 2 ′) and onto an adjacent part of the external face of said tube portion ( 2 ″).