Patent ID: 6433655
Filing Date: 2002-08-13
Classification: H01P

Abstract:
A dielectric filter comprising:a dielectric block having a substantially rectangular solid shape with a first end surface and a second end surface, and an outer conductor disposed on an outer surface of said dielectric block; a plurality of inner-conductor-coated resonance holes disposed inside the dielectric block extending between the first and second end surfaces; a portion of the first end surface adjacent to a first end portion of a first one of said inner-conductor-coated resonance holes being an open-circuited surface on which the outer conductor is not disposed, an input-output electrode being disposed on said outer surface and capacitance-coupled to said first end portion of said first inner-conductor-coated resonance hole; and a second one of said inner-conductor-coated resonance holes which is different from said first inner-conductor-coated resonance hole being connected at both said first and second end surfaces to said outer conductor, and an inner-conductorless portion being formed inside the second inner-conductor-coated resonance hole.