Folded-cavity dielectric load adjustable filter and duplexer

Abstract

The invention discloses a folding cavity dielectric loading adjustable filter, which comprises a group of resonant cavities and a tuning mechanism, wherein the resonant cavities are coplanar on the top surface and the bottom surface respectively, and the resonant cavities are arranged in a non-linear staggered manner, and coupling windows are respectively arranged between each resonant cavity andits upper and lower resonant cavities. At least two through holes are formed on the top surface / bottom surface of each resonant cavity. The tuning mechanism comprises a mounting disk arranged in parallel with the top and bottom surfaces of the resonant cavity, A set of tuning dielectric rods with the same height and corresponding to the through holes are vertically mounted on the mounting disk, and each tuning dielectric rod can be extended into the corresponding resonant cavity through the corresponding through holes with the relative movement between the mounting disk and the resonant cavityat the same depth. The invention also discloses a folding cavity medium loading adjustable duplexer. The invention has the advantages of compact structure, precise frequency tuning, basically keepingthe bandwidth unchanged while tuning the frequency, low echo and no microwave signal leakage.

Description

technical field [0001] The invention relates to an adjustable filter and a duplexer, belonging to the technical field of microwave communication. Background technique [0002] Tunable filters are an important part of microwave reconstruction systems, and are widely used in frequency hopping radio stations, electronic countermeasures, multifunctional receivers, and dynamic frequency allocation systems. [0003] Tunable filters have many advantages. For example, a system using an adjustable filter can achieve frequency conversion through remote control without requiring workers to climb high iron towers, saving the cost of later-stage operation of the communication system; a filter can cover There are many frequency bands, in order to reduce the number of materials of the system manufacturer and reduce the entire material type; the switching frequency can be remotely controlled anytime and anywhere to maximize the use of spectrum resources. [0004] Common tunable filters are...

AI Technical Summary

Problems solved by technology

These forms of tunable filters are not a big problem when applied to higher frequencies; but for lower frequencies, such as the 6GH and 7 / 8GHz frequency bands of point-to-point communications or the Sub-6GHz frequency bands in 5G communication technology, if they are still used In the above solution, the size of the adjustable filter is too large, which is not conducive to system integration, and will cause the entire system to be too bulky and lack practical value

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