Tuner to tune resonant frequency of dielectric resonator filter

The 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 including a groove portion, a first projection portion, a pillar and a second projection portion; and a disc including a first groove portion and a second 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 top of the first groove portion. The second projection portion is inserted to the second groove portion, and the lower side of the disc and the lower side of the second projection portion form a flat face with respect to each other. 本发明涉及种用于对介质谐振器滤波器的谐振频率进行调谐的调谐器，其中该调谐器的组件在调谐器中能够保持稳定的接合，该调谐器用来对介质谐振器的谐振频率进行微调。该调谐器包括螺栓单元以及盘部，该螺栓单元包括凹槽单元、第肩部单元、柱部和第二肩部单元；该盘部包括第凹槽单元和第二凹槽单元，并且该柱部插入到该盘部的该第凹槽单元中，该螺栓单元的该第肩部被该第凹槽单