Patent ID: 6087909
Filing Date: 2000-07-11
Classification: H01P

Abstract:
A dielectric filter, comprising:a dielectric block having two ends opposed to each other;an outer conductor disposed on an outer surface of said dielectric block;a plurality of resonator holes extending between said two ends of said dielectric block, each hole having a respective inner surface on which an inner conductor is provided, each inner conductor being connected to said outer conductor at one end to form a short-circuited end of the corresponding hole, and being isolated from said outer conductor at the other end to form an open-circuited end of the corresponding hole;at least one of said resonator holes comprising a large-sectional-area portion and a small-sectional-area portion arranged so that said at least one hole has different respective inner diameters at said open-circuited end and said short-circuited-end; andthe cross-sectional shape of said large-sectional-area portion being an elongated shape having a longitudinal axis, said longitudinal axis being slanted with respect to a plane in which said plurality of resonator holes are arranged.