Concave triple-mode cavity resonance structure and filter with the resonance structure

A concave triple-mode cavity resonance structure, comprising a cavity and a cover plate, wherein the cavity is internally provided with a dielectric resonant block and a dielectric support frame;

• the cavity takes a cube-like shape and at least one end face is concave;
• the dielectric resonant block takes a cube-like shape;
• the dielectric support frame is connected with the dielectric resonant block and an inner wall of the cavity, respectively;
• the dielectric resonant block and the dielectric support frame form a triple-mode dielectric resonator;
• a dielectric constant of the dielectric support frame is smaller than a dielectric constant of the dielectric resonant block;
• a ratio K of a size of a single side of the inner wall of the cavity to a size of a corresponding single side of the dielectric resonant block is:
• when K is greater than or equal to a transition point 1 and is smaller than or equal to a transition point 2, a Q value of a higher-order mode adjacent to a base mode is transited into a Q value of the base mode of the triple-mode cavity resonance structure, a base-mode resonant frequency after transition is equal to a base-mode resonant frequency prior to transition, a Q value of the base mode after transition is greater than a Q value of the base mode prior to transition, and a Q value of the higher-order mode adjacent to the base mode after transition is smaller than a Q value of the higher-order mode adjacent to the base mode prior to transition;
• the triple-mode dielectric resonance structure is internally provided with a coupling structure for changing an orthogonal property of a degenerate triple-mode electromagnetic field in the cavity;
• and
• the triple-mode dielectric resonance structure is internally provided with a frequency tuning device for changing a resonant frequency of the degenerate triple-mode in the cavity.

A concave triple-mode cavity resonance structure, comprising a cavity and a cover plate, wherein the cavity is internally provided with a dielectric resonant block and a dielectric support frame;

• the cavity takes a cube-like shape and at least one end face is concave;
• the dielectric resonant block takes a cube-like shape and at least one end face is concave;
• the dielectric support frame is connected with the dielectric resonant block and an inner wall of the cavity, respectively;
• the dielectric resonant block and the dielectric support frame form a triple-mode dielectric resonator;
• a dielectric constant of the dielectric support frame is smaller than a dielectric constant of the dielectric resonant block;
• a ratio K of a size of a single side of the inner wall of the cavity to a size of a corresponding single side of the dielectric resonant block is:
• when K is greater than or equal to a transition point 1 and is smaller than or equal to a transition point 2, a Q value of a higher-order mode adjacent to a base mode is transited into a Q value of the base mode of the triple-mode dielectric resonance structure, a base-mode resonant frequency after transition is equal to a base-mode resonant frequency prior to transition, a Q value of the base mode after transition is greater than a Q value of the base mode prior to transition, and a Q value of the higher-order mode adjacent to the base mode after transition is smaller than a Q value of the higher-order mode adjacent to the base mode prior to transition;
• the triple-mode dielectric resonance structure is internally provided with a coupling structure for changing an orthogonal property of a degenerate triple-mode electromagnetic field in the cavity;
• and
• the triple-mode dielectric resonance structure is internally provided with a frequency tuning device for changing a resonant frequency of the degenerate triple-mode in the cavity.