| 摘要 |
The present invention relates to a tuner to tune the resonant frequency of a dielectric resonator filter and, particularly, to a tuner to finely adjust the resonant frequency of a dielectric resonator filter and to keep a stable coupled state of constituent elements thereof. The tuner comprises: a bolt portion in which a groove portion is formed at the upper end of a body thereof with thread, a first projection portion is formed along the outer periphery of the body on the downside, a pillar extends on the downside of the first projection portion, and a second projection portion is formed along the outer periphery of the pillar at the lower end of the pillar; and a disc in which a first groove portion corresponding to the width of the pillar is formed such that the pillar is inserted to the center portion of a disc-shaped body thereof, and a second groove portion having a size for receiving the second projection portion is formed to subsequently pass through the body thereof, on the downside of the first groove portion. Also, the pillar is inserted into the first groove portion of the disc, and the first projection portion of the bolt portion is caught at the upper end of the first groove portion. The second projection portion is inserted to the second groove portion, and the lower end of the disc and the lower end of the second projection portion form a flat face with respect to each other. |
