Dual Mode Dielectric Filter

Abstract

The invention discloses a dual-mode dielectric filter, which belongs to the technical field of communication. The dual-mode dielectric filter includes: an input end, a plurality of resonant cavities and an output end connected in sequence; the first and last resonant cavities in the plurality of resonant cavities are single-mode resonant cavities, and the remaining resonant cavities are dual-mode A resonant cavity; the dual-mode resonant cavity has a cube structure, and the dual-mode resonance cavity realizes dual-mode resonance through the orthogonal degenerate modes of the cube structure. The input end and the output end of the present invention are at both ends of the dual-mode dielectric filter, which facilitates the vertical connection of the dual-mode dielectric filter and the antenna element. In addition, the first and the last resonant cavity in the plurality of resonant cavities are single-mode resonant cavities, and the remaining resonant cavities are dual-mode resonant cavities, and the dual-mode resonant cavities have a cube structure, and the dual-mode resonator cavities pass through the orthogonality of the cube structure. The degenerate mode of , realizes dual-mode resonance, therefore, the dual-mode dielectric filter can be made less loaded, larger in Q value, and smaller in insertion loss.

Description

technical field [0001] Embodiments of the present invention relate to the field of communication technologies, and in particular, to a dual-mode dielectric filter. Background technique [0002] Sub 6GHz in 5G (5th Generation) communication adopts MIMO (Multi-Input Multi-Output) technology, which requires a large number of filters to be integrated inside the antenna. Therefore, the loss of filters, out-of-band suppression, power Capacity, volume, weight, etc. have higher requirements. If a traditional metal filter is selected, the volume and weight of the traditional metal filter are too large to be integrated inside the antenna. If a small dielectric waveguide filter is selected, the above requirements can be met. Therefore, the dielectric filter has become a hot research topic at present. [0003] The dielectric filter in the related art includes a plurality of resonant cavities, and each resonant cavity adopts the working mode of the main mode, so that one resonant cavit...

AI Technical Summary

Problems solved by technology

Such a dielectric filter has the following disadvantages: 1) The quality factor Q value is small, and the insertion loss is large; 2) The input and output ends are on the back of the dielectric filter, and cannot be connected vertically to the antenna oscillator

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