Tunable dielectric resonator and dielectric filter

The present invention discloses a tunable dielectric resonator and a dielectric filter. The dielectric resonator comprises a body dielectric block and a dielectric tuning piece. The body dielectric block is provided with a first protective surface, and the dielectric tuning piece is provided with a second protective surface. The dielectric tuning piece is arranged on the body dielectric block, and the first protective surface is partly or completed covered by the second protective surface. The dielectric filter comprises two or more dielectric resonators which are combined to form the dielectric filter. The dielectric resonator and the dielectric filter have the advantages of compact structure, small size, and small loss. Through changing the overlapped area of two protective surfaces in the body dielectric block and the dielectric tuning piece, the perturbation of resonance frequency is realized, the dielectric resonator and the dielectric filter are flexible and easy to use, and the range of application is wide at the same time.