Small dielectric dual-mode filter without shell

Abstract

The embodiment of the invention discloses a small dielectric dual-mode filter without a shell, and belongs to the technical field of communication. The filter comprises n resonant cavities connected in series through a metal rod, wherein a metal sheet is arranged between every two adjacent resonant cavities, the first resonant cavity and the last resonant cavity in the n resonant cavities are metal resonant cavities, the remaining n-2 resonant cavities in the n resonant cavities are dielectric dual-mode resonant cavities, the dielectric dual-mode resonant cavities are of a symmetrical polygonal structure, metallization of the surfaces of the dielectric dual-mode resonant cavities is achieved, and the n resonant cavities are coupled through coupling windows on the metal sheets. According tothe filter provided by the embodiment of the invention, a metal shell does not need to be arranged outside the dielectric dual-mode resonant cavity, so that the filter has the advantages of being compact in size, small in loss, large in power capacity, high in out-of-band rejection and good in harmonic performance so as to effectively improve the anti-interference capacity and the frequency spectrum utilization rate of a 5G communication system, reduce the power consumption of the 5G communication system and improve the coverage range of the 5G communication system.

Description

technical field [0001] The embodiment of the present invention relates to the field of communication technology, in particular to a small-sized dielectric double-mode filter without a casing. Background technique [0002] Sub 6GHz in 5G (5th Generation) communication adopts MIMO (Multi-Input Multi-Output) technology, which needs to integrate a large number of filters inside the antenna. Therefore, the loss of filters, out-of-band rejection, power Capacity, volume, weight, etc. have higher requirements. [0003] If a traditional metal filter is selected, it cannot be integrated inside the antenna due to its volume and weight. If a small dielectric waveguide filter is selected, although the size of the small dielectric waveguide filter is small, its insertion loss is large and its power capacity is low. Contents of the invention [0004] An embodiment of the present invention provides a small-sized dielectric double-mode filter without a housing, which is used to solve the...

AI Technical Summary

Problems solved by technology

[0003] If the traditional metal filter is selected, it cannot be integrated inside the antenna due to the size and weight of the traditional metal filter.

If a small dielectric waveguide filter is selected, although the size of the small dielectric waveguide filter is small, its insertion loss is large and its power capacity is low

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