The filter consists of several rods acting as resonators and arranged in a hollow conductor (1). One end of each rod is connected to the hollow conductor and the other is capacitively loaded. The mutual separations of the rods are selected to form inductive couplings between them. Each capacitively loaded rod end protrudes into a chamber (19-22) formed in the hollow conductor by conducting separating walls (16-18). The capacitively loaded ends (8-11) are thickened wrt. the rest of the rod lengths. The individual rod ends carry tuning elements which protrude into the hollow conductor.
