Ceramic medium waveguide filter based on capacitive cross coupling flying rod

Abstract

The invention discloses a ceramic medium waveguide filter based on a capacitive cross coupling flying rod. The filter comprises a coupling membrane sheet and an adjustable flying rod. The coupling membrane sheet used for separating two cavity bodies and carrying out fine adjustment on coupling quantity is arranged between adjacent two cavity bodies. The adjustable flying rod used for adjusting thecapacitive coupling quantity between adjacent resonators is arranged between adjacent two resonance columns. The adjustable flying rod comprises a medium unit and a silver layer unit, wherein the medium unit and the silver layer are up-down connected and are adjustable in size. The silver layer unit is parallel to the plane formed by the resonance columns in the arranging direction. The exteriorof the silver layer unit is connected with an electric screw driver which is used for adjusting the area of the silver layer unit. According to the invention, the filter is novel in design, simple instructure and convenient and highly efficient to use and is characterized by convenient debugging and flexible and precise adjustment; capacitive coupling of multi-cavity cross coupling of three cavities and the like is achieved; excellent performance of the filter is ensured; cost is saved; the filter is safe and reliable; production efficiency and application effects are greatly improved; and more selections are provided for radio frequency engineers to design the filter.

Description

technical field [0001] The invention relates to the technical field of communication equipment, and more specifically relates to a ceramic dielectric waveguide filter based on a capacitive cross-coupling fly rod. Background technique [0002] As we all know, the existing flying rod materials and forms are mainly made of metal materials, and the flying rod base is installed inside the cavity for use. This kind of installation by machining is not only a cumbersome process, it cannot be adjusted after installation, and it is inconvenient to debug. It needs to disassemble the metal cover, take out the flying rod and change the length or shape of the flying rod by machining, and then put it into the cavity for testing. And then to complete a debugging. However, repeated machining and performance testing operations seriously affect the performance of the filter, and the debugging is complicated and the production efficiency is low. [0003] In addition, in the ceramic dielectric...

AI Technical Summary

Problems solved by technology

However, in practical applications, it is often encountered that when the two windows are opened to the maximum, the coupling requirements cannot be met.

Moreover, in the case of multi-cavity cross-coupling such as three cavities, it is easy to realize inductive coupling between two cavities, but it is difficult to realize capacitive coupling, which affects filter performance and use efficiency

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