Dielectric resonator and method adjusting a dielectric resonator

摘要

A dielectric resonator comprises a dielectric block (21) having an outer surface including first and second end surfaces substantially parallel to each other and a side surface extending between the first and second end surfaces. An external conductor (25) is formed on the outer surface of the dielectric block (21). At least one through hole (23) extends through the dielectric body (21) and an internal conductor (24) is provided in the at least one through hole. A predetermined portion of the side surface of the dielectric block (21) is shaped so that a first portion of the external conductor (25) at the shaped portion of the side surface is closer to the internal conductors (24) in the at least one through hole (23) as compared with a second portion of the external conductor on portions of the outer surface of the dielectric block other than the shaped portion. A non-conductive portion is provided at an inner surface of the at least one through hole wherein a surface of said non-conductive portion is flush with said inner surface of the at least one through hole. Signal input and output electrodes are provided on the outer surface of the dielectric body for providing capacitive connection with the internal conductor of the at least one through hole.