Abstract: A mixed-mode dielectric waveguide filter is provided. The mixed-mode dielectric waveguide filter includes a first multi-mode resonant cavity having at least two resonant modes, and a pair of first single-mode resonant cavities, wherein the pair of first single-mode resonant cavities correspond to the first multi-mode resonant cavity, and are directly coupled to a respective resonant mode of the first multi-mode resonant cavity to form a series topology with the first multi-mode resonant cavity, and wherein a parallel topology is formed between resonant modes of the first multi-mode resonant cavity.

Abstract: A dual-mode dielectric waveguide filter and a filtering apparatus are provided. The dual-mode dielectric waveguide filter includes a first dielectric cavity including a first dielectric body, a second dielectric cavity including a second dielectric body, electric field directions of the first dielectric cavity and the second dielectric cavity being perpendicular to each other, and a coupling portion connected with the first dielectric body and the second dielectric body to provide a coupling of the first dielectric cavity and the second dielectric cavity, where the first dielectric body and the second dielectric body are both formed in a rectangular parallelepiped shape, the first dielectric body and the second dielectric body are arranged in a stacked manner in a first direction, and two end faces of the first dielectric cavity and the second dielectric cavity in the third direction are formed as a coupling end face.

Abstract: A dielectric waveguide filter includes first resonant cavities, which are connected to form upper resonant cavities, and second resonant cavities, which are connected to form lower resonant cavities, wherein the upper and lower resonant cavities are correspondingly overlapped; each of the first resonant cavities has a first window coupling structure, wherein the first window coupling structure includes a first window opened at a position where the magnetic field distribution of a high-order mode in each of the first resonant cavities is the weakest, and/or a second window opened at a position where the electric field distribution of the high-order mode in each of the first resonant cavities is the strongest; and each of the second resonant cavities has a second window coupling structure corresponding to the first window coupling structure, and the first and second window coupling structures cooperate to eliminate the high-order modes of the dielectric waveguide filter.

Abstract: A dielectric filter includes a plurality of resonators, wherein each resonator included in the plurality of resonators includes a tuning hole; and at least one stepped hole for adjusting capacitive coupling, wherein the at least one stepped hole is disposed between two adjacent resonators included in the plurality of the resonators, wherein the stepped hole comprises a large hole and a small through hole at a bottom center of the large hole, wherein a first sidewall and a first annular bottom of the large hole are configured with a metal conductive layer, and wherein at least one of a second sidewall of the small through hole and a second annular portion outside a bottom of the small through hole is not covered with the conductive layer.

Abstract: The disclosure discloses a dielectric waveguide filter, comprising a plurality of first resonant cavities, each two of which are connected to form upper resonant cavities and a plurality of second resonant cavities, each two of which are connected to form lower resonant cavities, wherein the upper resonant cavities and the lower resonant cavities are correspondingly overlapped; each first resonant cavity has a first window coupling structure, wherein the first window coupling structure comprises: at least one of a first window opened at a position where the magnetic field distribution of a high-order mode in the first resonant cavity is the weakest, and a second window opened at a position where the electric field distribution of the high-order mode in the first resonant cavity is the strongest; and each second resonant cavity has a second window coupling structure corresponding to the first window coupling structure.

Abstract: A dielectric filter includes a plurality of resonators, wherein each resonator included in the plurality of resonators includes a tuning hole; and at least one stepped hole for adjusting capacitive coupling, wherein the at least one stepped hole is disposed between two adjacent resonators included in the plurality of the resonators, wherein the stepped hole comprises a large hole and a small through hole at a bottom center of the large hole, wherein a first sidewall and a first annular bottom of the large hole are configured with a metal conductive layer, and wherein at least one of a second sidewall of the small through hole and a second annular portion outside a bottom of the small through hole is not covered with the conductive layer.