Abstract: A triple-mode resonator includes a main body having a block of a dielectric material and an overlay of conductive material on the block; a first set of coupling windows provided in the overlay of conductive material on a first face of the main body to be coupled with a first single-mode resonator, and through which signals can be coupled into the main body; and a second set of coupling windows provided in the overlay of conductive material on a second face of the main body to be coupled with a second single-mode resonator, and through which signals can be coupled out of the main body, wherein the first and second sets of coupling windows each include an annular coupling window and a plurality of neighboring coupling windows located adjacent to the annular coupling window.

Abstract: The present disclosure relates to a dielectric cavity resonator, comprising: a metallic resonance cavity having a cuboid shape defining three orthogonal axes x, y, z substantially aligned with walls of the metallic resonance cavity and having a central axis extending in the z direction; a dielectric core provided in the metallic resonance cavity, the dielectric core comprising: a central part extending coaxially with respect to the central axis of the metallic resonance cavity; and four columnar parts arranged around the central part and integrally formed with the central part and each extending in the z direction and having a petal-like shape in an x-y cross-section perpendicular to the z direction, every two adjacent columnar parts being spaced by a groove, the dielectric core being centrosymmetric and axisymmetric in each x-y cross-section perpendicular to the z direction, wherein the metallic resonance cavity has a square cross-section, and in each petal-like cross-section, each columnar part extends in a

Abstract: The present disclosure relates to a triple-mode resonator, comprising: a main body made of a dielectric material and having a cuboid shape defining three orthogonal axes (x, y, z) substantially aligned with faces of the main body; and a conductive coating covering all of the main body except portions of the faces of the main body which defines at least one coupling aperture through which a signal can be coupled into and/or out of the main body, wherein the coupling aperture has a closed shape comprising a first and a second main edges extending along two of the axes respectively and a third main edge extending neither parallel nor perpendicular to the first and second main edges, the general shape and size and location of the coupling aperture is mainly determined by the first, second and third main edges, and the coupling aperture is configured in such a manner that desired three dominant resonance modes can be excited independently in the resonator by an input signal introduced therethrough.

Abstract: A resonator apparatus, a filter apparatus as well as a radio frequency and microwave device are disclosed. According to an embodiment, the resonator apparatus comprises an electrically conductive case and a dual-mode dielectric resonator provided in the electrically conductive case. The dual-mode dielectric resonator comprises a first dielectric block having a shape of a columnar body whose cross section is a cruciform. A mode coupling structure for coupling two resonant modes of the dual-mode dielectric resonator is provided in the columnar body. A bottom face of the columnar body is supported by an inner face of the electrically conductive case or by a supporting member provided on the inner face of the electrically conductive case. In at least one extending direction of a first extending direction and a second extending direction of the cruciform which are perpendicular to each other, lateral end faces of the columnar body are spaced apart from inner faces of the electrically conductive case.