Patent ID: 6163237
Filing Date: 2000-12-19
Classification: H01P

Abstract:
A dielectric filter, comprising:a dielectric block having substantially rectangular shape, said dielectric block including first and second surfaces opposed to each other, third and fourth surfaces opposed to each other and extending between said first and second surfaces, and fifth and sixth surfaces opposed to each other and extending between said first and second surfaces;a plurality of through holes extending between said first and second surfaces;an inner conductor provided on a respective inner surface of each of said through holes except for a non-conductive portion, each said non-conductive portion being disposed on said inner surface of the corresponding said through hole in the vicinity of said first surface of said dielectric block;an outer conductor provided on said third and fourth surfaces of said dielectric block; anda line conductor provided on said first surface of said dielectric block, a part of said outer conductor provided on said third surface of said dielectric block and a part of said outer conductor provided on said fourth surface of said dielectric block being connected to each other via said line conductor;thereby a plurality of resonators comprising a combination of a TEM mode resonator and a TE mode resonator, or a combination of a TEM mode resonator and a TM mode resonator being provided;at least three input/output external electrodes being provided on said fifth and sixth surfaces of said dielectric block; said input/output external electrodes including either: a TE or TM mode input electrode and a TEM mode input electrode, or a TE or TM mode output electrode and a TEM mode output electrode.