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Single-cavity filter with load coupling plate

A coupling plate and filter technology, applied in the filter field, can solve the problem of high natural frequency of the filter, achieve the effect of reducing the resonance frequency, increasing the coupling capacitance, and reliable performance

Inactive Publication Date: 2013-01-16
KAELUS COMM EQUIP SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using the resonance mode of conventional loading flange, under a certain size, the natural frequency of the filter is higher

Method used

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  • Single-cavity filter with load coupling plate

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Embodiment

[0017] Such as figure 1 As shown, a single-cavity filter with a loading coupling plate is provided. The cover plate 1 covers the cavity 5 to form a closed resonant cavity. On the board, there is a gap between the flange plate 21 of the resonant column 2 and the cover plate 1 . A loading coupling plate 3 is arranged under the flange 21 and is fixed on the side wall of the cavity 5 by fixing screws 41 . The diameter of the loading coupling plate 3 is larger than that of the flange 21 , which is used to increase the coupling capacitance and reduce the resonance frequency without changing the size of the cavity 5 and the resonance column 2 .

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Abstract

The invention relates to a single-cavity filter with a load coupling plate, which comprises a cavity, a cover plate and a resonant column, wherein the cavity is covered with the cover plate to form a closed resonant cavity; the resonant column is fixed in the cavity; a ring flange is arranged at the top of the resonant column; a gap is formed between the ring flange and the cover plate; the single-cavity filter further comprises the load coupling plate; the resonant column is sleeved with the load coupling plate; and the load coupling plate is fixed on the cavity. Compared with the prior art, the single-cavity filter has the advantages of simple process, reliable performances, lower resonant frequency and the like.

Description

technical field [0001] The invention relates to a filter, in particular to a single-cavity filter provided with a loading coupling plate. Background technique [0002] Microwave resonators are widely used in microwave signal sources, microwave filters and other related technologies, and are a basic microwave component. [0003] Considering the selectivity and power capacity of the circuit, sometimes the traditional resonant rod-loaded flange cannot reach the required resonant frequency. [0004] Resonant frequency of a single cavity L is closely related to the size of the resonant rod. The longer and thinner the resonant rod, the larger the L, the lower the frequency; the shorter and thicker the resonant rod, the smaller the L, the higher the frequency. C can be reflected by the size of the gap between the resonant rod and the cover plate and the size of the flange of the resonant rod. The larger the flange, the smaller the gap, the larger the C, the lower the frequency...

Claims

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Application Information

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IPC IPC(8): H01P1/207
Inventor 陈雪峰
Owner KAELUS COMM EQUIP SHANGHAI
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