Dielectric Resonator, Assembly Method Therefor, and Dielectric Filter

A dielectric resonator, comprising:

• a sealing cover, a dielectric resonant column, a metal cavity, and an electrically-conductive elastic structure body, the dielectric resonant column located within the metal cavity, wherein:
• the sealing cover is connected to an upper surface of the dielectric resonant column, and the sealing cover is located at an upper end face of the metal cavity, and the sealing cover is configured to seal the metal cavity;
• the metal cavity is provided with a groove at bottom, and the electrically-conductive elastic structure body is located within the groove at the bottom of the metal cavity, and the electrically-conductive elastic structure body is configured to support the dielectric resonant column, and the depth of the groove causes a lower surface of the dielectric resonant column to be lower than an inner bottom surface of the metal cavity after the sealing cover seals the metal cavity;
• and
• a lower end face of the dielectric resonant column is in contact with the electrically-conductive elastic structure body.