Dielectric resonator and filter

The utility model discloses a dielectric resonator and a filter. The antenna comprises a cavity, a cover plate covering the cavity and a dielectric resonance rod installed in the cavity, the cavity comprises a bottom wall opposite to the cover plate and side walls extending upwards from the periphery of the bottom wall, and the two ends of the dielectric resonance rod are connected with the cover plate and the bottom wall respectively. The dielectric resonance rod is also provided with a support arm abutting against the side wall, and the side wall is provided with an elastic part elastically abutting against the support arm. According to the utility model, at least one elastic part is arranged on the side wall of the cavity and elastically abuts against the support arm of the dielectric resonance rod, so that the dielectric resonance rod is well grounded, the reliability of the product under harsh conditions of high and low temperatures, temperature circulation and the like is improved through the elastic de