Patent ID: 8872605

Claim:
HF cavity filter comprising: a housing with a housing floor and a housing wall which rises from the housing floor, and at least one inner conductor which is arranged in the interior of the housing, wherein the housing with the housing floor and the housing wall and the inner conductor consist of metal, a housing cover is placed on a surrounding edge of the housing wall, the housing cover has multiple fixing holes, which align with corresponding holes in the housing wall, the housing cover seals the housing, in which multiple fixing screws, which penetrate the fixing holes in the housing cover and are screwed into holes which are axially aligned to it in the housing wall of the housing, the housing cover consists of a dielectric board material, which under the effect of the fixing screws is at least slightly deformable, on the underside of the dielectric board material facing the interior of the housing and thus the edge of the housing wall facing away from the housing floor, an electrically conductive layer is formed, and rests mechanically firmly on the edge under the effect of the fixing screws, and is contacted galvanically with the electrically conductive edge of the housing, wherein: the housing cover consists of a printed circuit board, at least one additional hole is made in the printed circuit board, into which a tuning socket is inserted, which on its outer circumference, in sections or surrounding it, includes a stop ring, which in the fitted state rests on the electrically conductive layer, the tuning socket, which consists of electrically conductive material, or is provided with an electrically conductive surface, being soldered to the electrically conductive layer, in the region of the stop ring, the tuning element can be twisted into the tuning socket to different distances, on the printed circuit board, at least one electrically conductive structure is formed, and the dielectrically conductive structure includes at least one track and/or at least one SMT component and/or at least one HF overcoupling device.