Patent ID: 6989722

Claim:
A dielectric filter comprising: a substantially rectangular dielectric block; a plurality of inner-conductor holes having respective apertures in a first end surface of said dielectric block and in a second end surface which is opposite to said first end surface of said dielectric block; a plurality of inner conductors formed respectively on inner surfaces of said plurality of inner-conductor holes; at least one concavity formed in one of a pair of opposed third and fourth end surfaces of the dielectric block, said pair of opposed third and fourth end surfaces forming side surfaces of the dielectric block in an array direction of said plurality of inner-conductor holes, said at least one concavity not extending onto the first and second end surfaces of the dielectric block and not intersecting any of the inner-conductor holes; and an outer conductor formed on an outer surface of said dielectric block including an inner surface of said at least one concavity.