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Filter cover plate, filter and processing method for filter cover plate

A filter and cover plate technology, which is applied in the field of filters, can solve problems affecting the volume of the resonant cavity, and achieve the effects of improving performance, reducing thickness, and increasing volume

Inactive Publication Date: 2016-02-03
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main technical problem to be solved by the present invention is to provide a filter cover plate, a filter and a filter cover plate processing method to solve the problem in the prior art that the volume of the resonant cavity is affected by the thickness of the filter cover plate

Method used

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  • Filter cover plate, filter and processing method for filter cover plate
  • Filter cover plate, filter and processing method for filter cover plate
  • Filter cover plate, filter and processing method for filter cover plate

Examples

Experimental program
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Effect test

Embodiment 1

[0026] This embodiment provides a filter cover plate, on which a flanged threaded through-hole for installing a tuning screw is provided, and a thread matched with the tuning screw is arranged in the flanged threaded through-hole. The flanged threaded through hole may be a one-way flanged threaded through hole or a two-way flanged threaded through hole. The one-way flanging threaded through hole means that it only flangs toward one side of the cover plate, and it can be flanged toward the inner side of the filter cover plate (the inner side of the cover plate refers to the side facing the filter cavity), or it can be turned toward the filter The outer flange of the cover. The bidirectional threaded through hole means that it is flanged toward the inner and outer sides of the filter cover plate.

[0027] In order to further illustrate the filter cover plate provided in this embodiment, an exemplary description is used below to describe it. See figure 2 , figure 2 This emb...

Embodiment 2

[0033] This embodiment provides a filter, which includes a filter cover and a cavity, and the filter cover is the filter cover provided in the first embodiment above. The filter cover is fixed on the cavity. At least one resonant column is also provided in the filter, and the flanged threaded through hole is located at the position corresponding to the resonant column in the cavity on the filter cover plate. After the cover plate is installed on the cavity, through the flanged screw thread The tuning screw that holes into the cavity fits right inside the resonating post. At least one resonant cavity can be arranged in the cavity of the filter, and when there is only one resonant cavity in the filter, the cavity of the filter is the cavity of the resonant cavity. When multiple resonant cavities are provided in the filter, it means that there are multiple sub-cavities in the filter, and each sub-cavity is isolated by isolation ribs in the filter cavity. For the coaxial cavity ...

Embodiment 3

[0036] This embodiment provides a filter cover processing method, please refer to Image 6 , Image 6 It is a schematic flow sheet of the processing method, the method comprising the steps of:

[0037] Step S601: Processing the cover plate material to obtain the cover plate base.

[0038] Step S602: using a mold to punch out flanged holes at the positions where the tuning screws are installed on the base of the cover plate. The punching and flanging hole specifically may include: punching a flanging pre-hole, and flanging at the flanging pre-hole with a mold.

[0039] Step S603: tapping in the flanging hole.

[0040] In the above step S602, the flanging hole can be unidirectional or bidirectional, so punching the flanging hole at the position where the tuning screw is installed on the base of the cover plate with a mold can be used to install the tuning screw on the base of the cover plate with a mold. At the position of the screw, punch one-way flanging holes toward the i...

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Abstract

The invention discloses a filter cover plate, a filter and a processing method for the filter cover plate. A flanged thread through hole used for mounting a tuning screw is formed in the filter cover plate provided by the invention; the cover plate provided with the flanged thread through hole has the characteristics that the flanged thread through hole has a certain depth; the thickness of other places in the cover plate is thinner than the thickness in the place of the flanged thread through hole; therefore, the flanged thread through hole is formed in the filter cover plate and the tuning screw is fixed in the flanged thread through hole, the thickness of the cover plate can be reduced, and enough thread numbers of the tuning screw can be ensured for fixing the tuning screw so as to ensure the stability of the tuning screw; and the overall thickness of the filter cover plate is reduced, so that the volume of the resonant cavity of filter is enlarged, the quality factor Q value is further increased, the insertion consumption of the filter is reduced, and the performance of the filter is improved consequently.

Description

technical field [0001] The invention relates to the field of filters, in particular to a filter cover, a filter and a processing method for the filter cover. Background technique [0002] Existing filters are generally composed of a plurality of resonant cavities, and the resonant cavity is formed by the cooperation of the cavity of the filter and the cover plate of the filter. Taking the coaxial cavity filter as an example, the structure of the resonant cavity is as follows figure 1 As shown, it includes fastening nut 101 , threaded through hole 102 , filter cover plate 103 , resonant cavity cavity 104 (which is also a part of filter cavity), resonant post 105 , and tuning screw 106 . The lower surface of the resonance column 105 is fixed on the bottom of the cavity 104 . The filter cover plate 103 and the resonant cavity body 104 are sealed by screws to form a closed cavity. The tuning screw 106 enters the cavity through the threaded through hole 102 on the cover plate ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/207H01P11/00
CPCH01P7/06H01P1/207H01P11/007
Inventor 戴晓文康玉龙
Owner ZTE CORP
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