A coaxial resonator is provided. The coaxial resonator has a first side and a second side, the coaxial resonator comprising a dielectric disc having a first surface, a second surface and a hole, wherein the second side of the coaxial resonator is connected to the first surface of the dielectric disc, wherein the coaxial resonator further comprises a conductive element connected to second surface of the dielectric disc. A filter comprising a housing, comprising a lid/cover and a chassis having one or more cavities adapted for receiving a coaxial resonator is also provided.

A coaxial resonator is provided. The coaxial resonator has a first side and a second side, the coaxial resonator comprising a dielectric disc having a first surface, a second surface and a hole, wherein the second side of the coaxial resonator is connected to the first surface of the dielectric disc, wherein the coaxial resonator further comprises a conductive element connected to second surface of the dielectric disc. A filter comprising a housing, comprising a lid/cover and a chassis having one or more cavities adapted for receiving a coaxial resonator is also provided.

The present invention comprises: a conductive chassis having a cavity resonator; a conductive cover to cover the cavity resonator; a resonant element arranged in the cavity resonator, one end of the resonant element being connected with the chassis and the other end being open end; and a movable conductor arranged in a space between the open end of the resonant element and the conductive cover. As a result, a tunable band-pass filter which is inexpensive and of a simple structure and which can change a resonance frequency of a cavity resonator and the coupling amount between cavity resonators easily is realized.

The present invention comprises: a conductive chassis having a cavity resonator; a conductive cover to cover the cavity resonator; a resonant element arranged in the cavity resonator, one end of the resonant element being connected with the chassis and the other end being open end; and a movable conductor arranged in a space between the open end of the resonant element and the conductive cover. As a result, a tunable band-pass filter which is inexpensive and of a simple structure and which can change a resonance frequency of a cavity resonator and the coupling amount between cavity resonators easily is realized.

The present application provides a dielectric resonator, a dielectric filter, a base station and a method for fabricating the dielectric resonator or the dielectric filter. The dielectric resonator includes: a solid dielectric resonator body, a blind hole located on one side of the solid dielectric resonator body, a metalized layer covering both a surface of the solid dielectric resonator body and a surface of the blind hole, and a demetallized notch located at the metalized layer on the surface of the blind hole. The dielectric resonator provided in the present application can implement tuning of the dielectric resonator, and reduce impact on the resonance frequency of the dielectric resonator after the dielectric resonator is tuned, where the impact caused by that the demetallized notch is covered by a metal material in an assembly process of the dielectric resonator, and signal energy that is leaked from the notch is reduced.

The present application provides a dielectric resonator, a dielectric filter, a base station and a method for fabricating the dielectric resonator or the dielectric filter. The dielectric resonator includes: a solid dielectric resonator body, a blind hole located on one side of the solid dielectric resonator body, a metalized layer covering both a surface of the solid dielectric resonator body and a surface of the blind hole, and a demetallized notch located at the metalized layer on the surface of the blind hole. The dielectric resonator provided in the present application can implement tuning of the dielectric resonator, and reduce impact on the resonance frequency of the dielectric resonator after the dielectric resonator is tuned, where the impact caused by that the demetallized notch is covered by a metal material in an assembly process of the dielectric resonator, and signal energy that is leaked from the notch is reduced.

The present invention relates to a multi-mode resonator comprising: a housing in which a cavity corresponding to a substantially single accommodating space is arranged; and multiple resonance ribs which are arranged at a predetermined interval therebetween in the cavity, have lower ends fixed to a floor surface of the housing, have upper ends facing each other, and generate a resonance signal by multiple coupling therebetween.

The present invention relates to a multimode resonator comprising: a housing provided with a cavity substantially corresponding to one accommodation space; a plurality of resonance arms arranged at preset intervals from each other in the cavity and generating resonance signals by complex mutual coupling; and a plurality of resonance legs for respectively supporting the plurality of resonance arms.

The invention relates to an improved tunable high frequency filter of coaxial construction, characterized, inter alia, by the following features: The high frequency filter comprises an outer conductor housing (24) having an inner conductor (10) and a housing cover (22); the resonator (1) comprises a tuning element (30) arranged opposite the inner conductor (10), which in the housing cover (22) is held position-adjustably in the axial position of the tuning element (30), at least indirectly, and which extends into the internal space of the resonator; the tuning element (30) comprises a dielectric material, or is formed from a dielectric material such that between the outer thread (32) and the inner thread (41), current transitions are avoided.

The invention relates to an improved tunable high frequency filter of coaxial construction, characterized, inter alia, by the following features: The high frequency filter comprises an outer conductor housing (24) having an inner conductor (10) and a housing cover (22); the resonator (1) comprises a tuning element (30) arranged opposite the inner conductor (10), which in the housing cover (22) is held position-adjustably in the axial position of the tuning element (30), at least indirectly, and which extends into the internal space of the resonator; the tuning element (30) comprises a dielectric material, or is formed from a dielectric material such that between the outer thread (32) and the inner thread (41), current transitions are avoided.