Dielectric filter

Abstract

The present disclosure relates to a dielectric filter. It comprises a first single-mode dielectric resonator, a second single-mode dielectric resonator, and a triple-mode dielectric resonator arranged side by side in sequence in a first direction, adjacent dielectric resonators being coupled by coupling windows provided between their opposite surfaces, 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 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 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 a length of the first main coupling window measured along the second direction.