Folded strip line type dielectric resonator and multilayer dielectric filter using the same

摘要

A dielectric resonator of a folded strip line type structure in which an electrode is formed on the outer circumferential portion of a cutout- carrying U-shaped dielectric substrate exclusive of the upper and lower surfaces thereof and either one of two end surfaces at the opened portion of the cutout. An island electrode formed in the vicinity of a non- electrode-carrying end surface out of the two end surfaces at the opened portion of the cutout is used as an input-output coupling electrode. The inner wall surface of the cutout can be formed wavily, and a separate dielectric member can be fitted into the cutout.