A microwave resonator comprising a hollow tube comprising fan electrically conductive tube wall which defines a tube bore, the tube extending along a length axis from a first end to a second end; a first electrically conductive closing plate closing the first end of the tube; a second electrically conductive closing plate closing the second end of the tube; a plurality of dielectric resonant pucks, each puck comprising first and second end faces and a side wall extending therebetween, each puck being dimensioned such that its dominant mode is a doubly degenerate mode; the pucks being arranged within the tube bore spaced apart from each other and the closing plates, each puck being arranged with its end faces normal to the length axis and centered on the length axis and its side wall abutting the tube wall such that there is no air gap between the puck and tube wall which extends from one end face to the other of the puck, the puck adjacent to the first closing plate being termed the input puck; each puck being separated from the adjacent puck in the tube bore by a coupling gap, each coupling gap having ah electrically conductive iris plate arranged therein, each iris plate being arranged normal to the length axis, each iris plate comprising at least one coupling slot extending therethrough; an input microwave coupler adapted to receive a microwave signal and provide it to the input puck; each puck comprising a symmetry breaking structure for modifying the frequency of one of the degenerate modes relative to the other and the coupling between the two modes.

The disclosure discloses an irregular-shaped cavity multi-mode resonance structure and a filter with the resonance structure. The irregular-shaped cavity multi-mode resonance structure includes a cavity and a cover plate, wherein the cavity is internally provided with a dielectric resonance block and a dielectric support frame; at least one end face of the cavity is concave or convex, and at least one end face of the dielectric resonance block is convex or concave, the dielectric resonance block and the dielectric support frame form a triple-mode dielectric resonance rod; one end or any end of the cube-like dielectric resonance block is respectively connected with the dielectric support frame; the dielectric support frame is connected with an inner wall of the cavity; and the dielectric resonance block forms triple-mode resonance in three directions along the X, Y and Z axes of the cavity.

A radio-frequency filter with at least one dielectric multi-mode resonator is provided. The resonator includes a metal housing with a top surface, a bottom surface, four sectors between the top and bottom surfaces, and including a resonator cavity therein. The resonator further includes a dielectric body positioned inside the cavity, the dielectric body having a first thickness between the top and bottom surfaces of the cavity, wherein there is a gap between the sectors of the housing and the dielectric body, the dielectric body including a hollow on the surface facing the top surface of the housing and on the surface facing the bottom surface of the housing, the dielectric body thus having a second thickness at the location of the hollows, the second thickness being smaller than the first thickness.

This application discloses a filtering apparatus, including: a coupling channel distinguishing component, dividing a coupling channel between a first filtering component and a second filtering component into a plurality of independent coupling channels, and it includes a channel distinguishing component and at least one decoupling component, the channel distinguishing component is configured to divide the coupling channel into a plurality of independent channels, and the decoupling component is configured to decouple the plurality of independent channels into the plurality of independent coupling channels; and at least one adjusting component, each of the adjusting component is configured to adjust a preset coupling scheme of a corresponding independent coupling channel, each of the at least one adjusting component is located in the corresponding independent coupling channel, and each of the adjusting component is located in a corresponding projection area.

The disclosure provides a high-Q triple-mode cavity dielectric resonant hollow structure and a filter with the dielectric resonant structure. The structure includes a cavity and a cover plate, wherein the cavity is internally provided with a cube-like dielectric resonance block and a dielectric support frame; the cube-like dielectric resonance block and the dielectric support frame form a triple-mode dielectric resonance rod; air is arranged between the triple-mode dielectric resonance rod and an inner wall of the cavity; one end or any end of the cube-like dielectric resonance block is connected with the dielectric support frame respectively; the dielectric support frame is connected with an inner wall of the cavity; and the cube-like dielectric resonance block forms triple-mode resonance in directions of X, Y and Z-axes of the cavity.

A microwave resonator comprising a hollow tube comprising an electrically conductive tube wall which defines a tube bore, the tube extending along a length axis from a first end to a second end; a first electrically conductive closing plate closing the first end of the tube, the first electrically conductive closing plate comprising at least one coupling slot extending therethrough; a second electrically conducting closing plate closing the second end of the tube, the second electrically conductive closing plate comprising at least one coupling slot extending therethrough; a plurality of dielectric resonant pucks, each puck comprising first and second end faces and a side wall extending therebetween, each puck being dimensioned such that when in the tube its dominant mode is a doubly degenerate mode; the pucks being arranged within the tube bore spaced apart from each other and the closing plates, each puck being arranged centered on the length axis and its side wall abutting the tube wall such that there is no air gap between the puck and the tube wall which extends from one end face to the other of the puck, the puck adjacent to the first closing plate being termed the input puck; each puck being separated from the adjacent puck in the tube bore by a coupling gap, each coupling gap having an electrically conductive iris plate arranged therein, each iris plate being arranged normal to the length axis, each iris plate comprising at least one coupling slot extending therethrough; a single mode input microwave resonator adapted to provide a microwave signal to the input puck; each puck comprising a symmetry breaking structure for modifying the frequency of one of the degenerate modes relative to the other and the coupling between the two modes; each puck further comprising a central aperture extending from one end face to the other along the length axis; and, each central aperture comprising at least one electrically conductive insert arranged therein.

The present disclosure presents a dual-channel filter based on a dielectric resonator, which includes a metal cavity, a dielectric resonator, two tuning metal probes, and four feeding metal probes. The dielectric resonator is disposed at the center of the metal cavity. The four feeding metal probes are disposed around the metal cavity, and coupled to the dielectric resonator. The two tuning metal probes are connected to the metal cavity, and respectively located at a central position directly above and below the dielectric resonator. The dual-channel filter integrates two channel filters with good isolation between them, and has two input ports and two output ports.

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.

A dual-band filtering switch based on a single quad-mode dielectric resonator (DR) includes: a first printed circuit board (PCB) provided thereon with an input terminal; a second PCB provided thereon with an output terminal; a shielding shell arranged between the first and second PCBs and enclosing a shielding cavity together with the first and second PCBs; and a single quad-mode DR arranged in the shielding cavity. The first and second PCBs each include a feeding layer, a dielectric layer, and a ground layer that are stacked in sequence. The feeding layers of the first and second PCBs each include a microstrip line and a switching circuitry connected to the microstrip line, and the feeding layer is in contact with a surface of the DR to realize a switching function of the filtering switch. The proposed filtering switch feature low loss transmission and high selectivity with dual-band operation, miniaturization with the fewest resonators and friendly-integration, simultaneously.

A cross-coupled filter includes a resonant structure including a plurality of columns of resonant units, each column of resonant units includes at least two resonators. A dominant coupling mode of a coupling between two adjacent resonators in a same column is electrical coupling or magnetic coupling. Dominant coupling modes of a plurality of groups of two adjacent resonators in the same column alternate between electrical coupling and magnetic coupling. A dominant coupling mode of a coupling between two adjacent resonators in adjacent columns is electrical coupling or magnetic coupling. Dominant coupling modes of a plurality of groups of two resonators of two adjacent columns alternate between electrical coupling and magnetic coupling, to form at least a set of cross-coupling. The present disclosure realizes miniaturization and light weight in structural characteristics, and realizes low loss and good harmonic characteristics in electrical performance.