Dielectric filter

A dielectric filter (1), comprising:

• a first single-mode dielectric resonator (110), a second single-mode dielectric resonator (120), and a triple-mode dielectric resonator (130) arranged side by side in sequence in a first direction (Y),
• the first single-mode dielectric resonator, the second single-mode dielectric resonator, and the triple-mode dielectric resonator being coupled by coupling windows provided between opposite surfaces of adjacent ones of the first single-mode dielectric resonator, the second single-mode dielectric resonator, and the triple-mode dielectric resonator,
• characterized in that, the coupling windows between the first single-mode dielectric resonator (110) and the second single-mode dielectric resonator (120) comprise a first main coupling window (111) and a first cross coupling window (112),
• a length of the first main coupling window (111) measured along a second direction (X) is greater than half of a length measured along the second direction, of a filter cross section where the first main coupling window is located, and a width of the first main coupling window (111) measured along a third direction (Z) is less than half of a width measured along the third direction, of the filter cross section where the first main coupling window is located, the first direction, the second direction and the third direction being three dimensional extension directions of the dielectric filter,
• a length of the first cross coupling window (112) measured along the second direction is less than the length of the first main coupling window (111) measured along the second direction,
• wherein the coupling windows between the second single-mode dielectric resonator (120) and the triple-mode dielectric resonator (130) comprise a first mode coupling window (121), a second mode coupling window (122) and a third mode coupling window (123);
• the first mode coupling window (121), viewed in terms of a shape of a filter cross section where it is located, is located near a first edge of the shape and is centrally arranged in an extension direction of the first edge, the second mode coupling window (122), viewed in terms of a shape of a filter cross section where it is located, is located near a second edge of the shape adjacent to the first edge and is centrally arranged in an extension direction of the second edge, and the third mode coupling window (123), viewed in terms of a shape of a filter cross section where it is located, is located in a corner region of the shape that is opposite to an angle defined by the first edge and the second edge.

A dielectric filter, comprising:

• a first single-mode dielectric resonator, a second single-mode dielectric resonator, a triple-mode dielectric resonator, and a third single-mode dielectric resonator arranged side by side in sequence in a first direction (Y),
• the first single-mode dielectric resonator, the second single-mode dielectric resonator, the triple-mode dielectric resonator, and the third single-mode dielectric resonator being coupled by coupling windows provided therebetween,
• characterized in that, the coupling windows between the first single-mode dielectric resonator and the second single-mode dielectric resonator comprise a first main coupling window and a first cross coupling window,
• a length of the first main coupling window measured along a second direction (X) is greater than half of a length measured along the second direction, of a filter cross section where the first main coupling window is located, and a width of the first main coupling window measured along a third direction (Z) is less than half of a width measured along the third direction, of the filter cross section where the first main coupling window is located, the first direction, the second direction and the third direction being three dimensional extension directions of the dielectric filter,
• a length of the first cross coupling window measured along the second direction is less than the length of the first main coupling window measured along the second direction,
• and the coupling windows between the triple-mode dielectric resonator and the third single-mode dielectric resonator comprise a first mode transmission coupling window, a second mode transmission coupling window and a third mode transmission coupling window, wherein the first mode transmission coupling window, viewed in terms of a shape of a filter cross section where it is located, is located near a first edge of the shape and is centrally arranged in an extension direction of the first edge, the second mode transmission coupling window, viewed in terms of a shape of a filter cross section where it is located, is located near a second edge of the shape adjacent to the first edge and is centrally arranged in an extension direction of the second edge, and the third mode transmission coupling window, viewed in terms of a shape of a filter cross section where it is located, is located in a corner region of the shape that is opposite to an angle defined by the first edge and the second edge.