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Dielectric filter

A dielectric filter and resonator technology, applied in the field of filters, can solve the problems of inconvenient debugging and affecting production efficiency.

Active Publication Date: 2017-06-27
COMBA TELECOM TECH (GUANGZHOU) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When there is a combiner, multiple signals in the filter share one cover, which is particularly inconvenient for debugging and affects production efficiency

Method used

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  • Dielectric filter

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Embodiment Construction

[0017] The present invention will be described in detail below in conjunction with the drawings and embodiments.

[0018] See figure 1 , figure 1 It is a partial perspective view of an embodiment of the TE mode dielectric filter port of the present invention, such as figure 1 As shown, it includes a cover 11, a cavity 12, a first resonator 13, a second resonator 14, a third resonator 15, a flying rod 16 and a tuning rod 17.

[0019] Wherein, the cover plate 11 is arranged above the cavity 12.

[0020] The first resonator 13, the second resonator 14, and the third resonator 15 are respectively placed in the cavity 12, and the first resonator 13 and the second resonator 14 are shielded by a metal wall, and the third resonator 15 and The first resonator 13 and the second resonator 14 are coupled to form a cross-coupled state.

[0021] The first resonator 13 includes a resonant cavity 131 and a resonant column 132 disposed in the resonant cavity 131, the second resonator 14 includes a ...

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PUM

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Abstract

The invention discloses a dielectric filter, which comprises a cavity and a cover plate covering the cavity, two resonators shielded by metal walls are arranged in the cavity, each resonator includes a resonant cavity and a Resonant columns in the cavity. The dielectric filter also includes a flying rod that penetrates the metal wall and is insulated from the metal wall; the flying rod has two side arms, which are respectively located in the two resonant cavities of the two resonators, and are used to resonate with the corresponding resonant cavities respectively. Column phase coupling; at least one side arm of the flying rod is located on the side facing away from the resonant column, and a tuning rod that penetrates the cover plate and goes deep into the corresponding resonant cavity is provided. Coupling strength between fly rod sidearm and resonant column. Through the above method, the dielectric filter of the present invention can adjust the coupling strength between the fly rod and the resonant column without removing the cover plate of the dielectric filter.

Description

Technical field [0001] The present invention relates to the field of filters, in particular to a dielectric filter. Background technique [0002] In modern mobile communication technology, microwave radio frequency devices are an important part. As a basic radio frequency unit, the filter has a series of indicators such as insertion loss, out-of-band suppression, 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 achieve a high quality factor (Q value) when the cavity size is limited, resulting in certain restrictions on out-of-band suppression and insertion loss. In addition, the silver plating treatment on the metal surface will also have a certain impact on the passive intermodulation index. [0003] At present, dielectric filters are gradually applied to various communication base stations due to their low loss and high selectivity. Its adva...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/205
Inventor 丁海
Owner COMBA TELECOM TECH (GUANGZHOU) CO LTD
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