Patent ID: 7728700

Claim:
A high frequency filter in a coaxial construction with at least one resonator, comprising: at least one resonator comprising a housing with an inner space, the housing comprising first and second end walls located offset with respect to one another in the axial direction, an external conductor provided between the first and second end walls, an internal conductor held by a lower end thereof on said first end wall and electrically connected to the first end wall, said internal conductor having a free upper end, the free upper end of the internal conductor opposing the lower end thereof at a spacing in front of the opposing second end wall, a thread receiver with an internal thread provided in the second end wall opposing the free end of the internal conductor or in a region of the free end of the internal conductor, the thread receiver having a thread pitch and a thread pitch angle, a tuning element with an external thread configured to be screwed in or unscrewed to a variable extent into the thread receiver, to provide a distancing space between the free ends of the internal conductor and the second end wall of the housing located opposite thereto, the external thread having a thread pitch and a thread pitch angle, the thread pitch or the thread pitch angle of the external thread of the tuning element differing from the thread pitch or the thread pitch angle of the internal thread of the thread receiver at least in a partial portion of a length of the internal thread and/or of the external thread, a difference between the thread pitches or the thread pitch angle between the external thread of the tuning element and the internal thread of the thread receiver being more than 0.5%.