Patent ID: 6448871
Filing Date: 2002-09-10
Classification: H01P

Abstract:
A dielectric filter comprising:a plurality of internal-conductor holes, each having an internal conductor formed on a surface thereof inside a dielectric block which has a substantially rectangular parallelepiped shape, each hole having two ends and the portions in the vicinity of both ends being open ends, and an external conductor formed on the outer surface of said dielectric block; a pair of balanced terminals, each being coupled to the vicinity of a respective one of the open ends of the internal conductor formed in a predetermined one of said internal-conductor holes; and an unbalanced terminal which is coupled to the vicinity of one of the open ends of the internal conductor formed in another one of said internal-conductor holes, wherein the sizes of the cross sections of said internal-conductor hole in which is formed the internal conductor to which said balanced terminal is coupled and said internal-conductor hole in which is formed the internal conductor to which said unbalanced terminal is coupled are different.