Combining-dividing structure of cavity radio frequency device and cavity radio frequency device adopting same

Abstract

The invention discloses a combining-dividing structure of a cavity radio frequency device. The combining-dividing structure comprises a first access and a second access, which are arranged in a cavity, wherein combining output of signals can be realized by the first access and the second access through a combining port, the combining port comprises a port joint, an inner conductor arranged in the port joint and a metal sleeve sleeved on the inner conductor, an insulation layer is arranged between the inner conductor and the metal sleeve, wherein the first access is realized by a medium filter and comprises at least one medium harmonic oscillator, and an arc-shaped lead is introduced from the inner conductor and is coupled with the medium harmonic oscillator which is adjacent to the combining port; the second access is realized by a metal coaxial filter and comprises at least one resonant column, and a lead is introduced from the metal sleeve and is electrically connected with the resonant column, which is adjacent to the combining port, in the metal coaxial filter. The invention further discloses the cavity radio frequency device adopting the combining-dividing structure. The cavity radio frequency device has the advantages of novel structural design, simple structure and good intermodulation, and is suitable for mass production.

Description

technical field [0001] The invention relates to a signal splitting and combining technology, in particular to a splitting and combining structure of a dielectric filter and a metal coaxial filter and a cavity radio frequency device adopting the structure. Background technique [0002] In modern mobile communication technology, radio frequency devices have become an indispensable and important part. As a basic radio frequency unit, the filter has a series of indicators such as insertion loss, out-of-band rejection, passive intermodulation and power capacity, which have an important impact on the performance of the whole machine. Due to its own loss, the traditional metal coaxial cavity filter cannot obtain a high quality factor (Q value) when the cavity size is limited, resulting in certain restrictions on out-of-band rejection, insertion loss and other indicators , and the metal surface silver plating treatment and other links will also have a certain impact on the passive ...

AI Technical Summary

Problems solved by technology

Due to its own loss, the traditional metal coaxial cavity filter cannot obtain a high quality factor (Q value) when the cavity size is limited, resulting in certain restrictions on indicators such as out-of-band rejection and insertion loss. , and the metal surface silver plating treatment and other links will also have a certain impact on the passive intermodulation index

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