CN211700518U

CN211700518U - Filter and communication equipment using the same

Info

Publication number: CN211700518U
Application number: CN202020135708.9U
Authority: CN
Inventors: 王细冬
Original assignee: Shenzhen Tatfook Technology Co Ltd
Current assignee: Shenzhen Tatfook Technology Co Ltd
Priority date: 2020-01-21
Filing date: 2020-01-21
Publication date: 2020-10-16
Anticipated expiration: 2030-01-21

Abstract

The utility model relates to a filter and a communication device using the filter, which comprises a cavity of the filter, a resonator positioned in the cavity and a cover plate covering the cavity, wherein the resonator can be rotatably arranged on the cover plate around the axial lead of the resonator and is suspended in the cavity; the resonator coupling surface on the bottom surface of the resonator is opposite to the cavity coupling surface on the bottom of the cavity, when the resonator is rotated, the distance between the resonator coupling surface and the cavity coupling surface body is unchanged, and the effective coupling areas of the two coupling surfaces are correspondingly changed. Compared with the prior art, the utility model discloses adjusting screw is got rid of to the wave filter, has reduced the height of wave filter, compact structure, and the volume is littleer and debugging easy operation.

Description

Filter and communication equipment using the same

Technical Field

The utility model relates to a communication technology field, in particular to waveguide device especially relates to a wave filter.

Background

The filter for communication equipment can effectively inhibit useless signals and plays the roles of selecting signals, attenuating noise, filtering interference and the like. With the development of miniaturization and lightness of mobile communication devices and equipment base stations, filters in the mobile communication devices and the equipment base stations are required to be suitable for narrow assembling spaces in the mobile communication devices and the equipment base stations, and the requirements of smaller structures and better performance are met. Referring to fig. 1, the filter of the prior art includes a filter cavity 93, a resonator 95 installed in the cavity, a cover plate 94 covering the cavity, and an adjusting screw 99 erected on the cover plate by a locking nut 91; the depth of the adjusting screw rod is adjusted, so that the coupling area and the coupling distance of the resonator are changed to achieve the purpose of adjusting the coupling amount. The screw locking operation is not only troublesome, but also the adjusting screw and the locking nut are partially higher than the cover plate, the higher space is wasted space, the height of the filter cannot be minimized, and the requirement of miniaturization of the use environment is not met. In the screw rod adjusting mode, when the screw rod is repeatedly screwed and loosened, the thread is easy to slip, and a part of the thread of the screw rod extends into the cavity, so that the performance of the filter is deteriorated.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, provide a reduce height, conveniently adjust the wave filter of coupling volume.

The utility model provides a technical scheme that its technical problem adopted does:

a filter comprises a cavity of the filter, a resonator positioned in the cavity and a cover plate covering the cavity, wherein the resonator is particularly rotatably arranged on the cover plate around the axis of the resonator and is suspended in the cavity; the resonator coupling surface on the bottom surface of the resonator is opposite to the cavity coupling surface on the bottom of the cavity, when the resonator is rotated, the distance between the resonator coupling surface and the cavity coupling surface is unchanged, and the effective coupling areas of the two coupling surfaces are correspondingly changed.

Further, the method comprises the following steps:

the resonator coupling surface is any shape of a circle rotated with the axis of the resonator as the center.

The cavity coupling surface is any shape of a circle rotated centering on the axis of the resonator.

The shapes of the resonator coupling surface and the cavity coupling surface body can be the same or different.

The resonator coupling surface comprises a plane or a curved surface.

The cavity coupling surface comprises a plane or a curved surface, is arranged at a convex part or a concave part of the bottom surface of the cavity and comprises a plane or a curved surface.

The resonator is riveted on the cover plate through the elastic device, the resonator is tightly contacted with the cover plate surface, and the resonator can rotate around the axis of the resonator.

The elastic device comprises a disc spring, an elastic pad or a rubber pad.

The filter comprises one or more than one resonator, and when the number of the resonators is more than one, the resonators are arranged in each cavity of the filter in a one-to-one correspondence mode.

The utility model discloses still provide a communication equipment, use foretell wave filter, communication equipment is including the dustcoat, antenna array, wave filter, shield cover, PCB board and the radiator of arranging in proper order, a allies oneself with of wave filter is participated in and is connected with the antenna, and another allies oneself with and participated in and pass through the shield cover and link to each other with the PCB board.

Compared with the prior art, the utility model discloses adjusting screw is got rid of to the wave filter, has reduced the height of wave filter, compact structure, and the volume is littleer and debugging easy operation, more is applicable to miniaturized demands such as mobile communication device.

Drawings

FIG. 1 is a schematic diagram of the structure of components within the cavity of a prior art filter;

fig. 2 is a schematic cross-sectional view of an orthographic projection of each component in a cavity according to a first preferred embodiment of the filter of the present invention;

fig. 3 is a schematic diagram of the effective coupling of two coupling surfaces of the filter of the present invention;

fig. 4 is a schematic diagram of an axial side projection of a resonator of the filter of the present invention;

fig. 5 is a schematic cross-sectional view of an orthographic projection of each component in a cavity according to a second preferred embodiment of the filter of the present invention;

fig. 6 is a schematic cross-sectional view of an orthographic projection of each component in a cavity according to a third preferred embodiment of the filter of the present invention;

fig. 7 is a schematic diagram of an axonometric projection of a filter according to a fourth preferred embodiment of the filter of the present invention.

Detailed Description

The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

In a first embodiment, as shown in fig. 2 to 4, a filter includes a resonator 35 of the filter, which is suspended in a cavity 31 of the filter by a resilient device 303, such as a disc spring, riveted to a cover plate 34, the resilient device 303 can ensure that the resonator is in close contact with the cover plate surface and cannot rotate after being riveted, that is, the resonator can rotate around its own central axis, and a resonator coupling surface 300 is formed on a bottom surface of the resonator 35; the shape of the coupling surface of the resonator is any shape except a circle which rotates around the axis of the resonator, such as a triangle, a polygon, a star, any figure with irregular outer edge, an ellipse, or a circle with the axis of the resonator as the center of circle.

A cavity coupling surface is arranged on the bottom surface of the cavity opposite to the resonator coupling; referring to fig. 3, the overlapping portion of the two coupling surfaces is the effective coupling area.

The cavity coupling surface is located at a protrusion or a recess, in this case a protrusion, at the bottom of the cavity opposite to the coupling surface of the resonator 35. The coupling surface cavity 31 may be a plane or a curved surface, and the shape of the coupling surface cavity is any shape except a circle rotating around the axis of the resonator, such as a triangle, a polygon, a star, an irregular figure on the outer edge, an ellipse, or a circle without the axis of the resonator as the center of a circle. The cavity coupling surface and the resonator coupling surface are also the same shape, and may also be different.

The coupling quantity of the filter depends on the distance between the two coupling surfaces and the effective coupling area of the two coupling surfaces; the coupling quantity is inversely proportional to the distance and directly proportional to the area; after the resonator and the cover plate are riveted, the distance between the coupling surface of the resonator and the coupling surface of the cavity is fixed.

When the direction of the resonator is adjusted, the effective coupling area of the resonator and the resonator can be changed, so that the adjusting function is achieved. Therefore, an adjusting screw rod of the traditional filter extending outside the resonant cavity is effectively omitted, the height of the filter is effectively reduced, the installation space is reduced, and the manufacturing cost is reduced; meanwhile, the filter has few structural parts, is simple to debug and operate (the direction of the resonator can be adjusted), has no thread locking mechanism, does not have the risk of product failure caused by thread sliding, and does not loosen. The threads of the existing screw rod adjusting mode are easy to slip when the screw rod is repeatedly screwed and loosened, and a part of the threads of the screw rod extends into the cavity, so that the performance of the filter is poor.

The filter structure in this embodiment can set up the counter bore on the apron for the regulation part of syntonizer is not higher than the apron face completely, more makes things convenient for the assembly and satisfies more narrow and small usage space needs.

Second embodiment, referring to fig. 5, the structure of the filter in this example is substantially similar to that of the first embodiment, except that the resonator coupling surfaces 300 of the filter in this example are curved surfaces.

Third embodiment, referring to fig. 6, the structure of the filter in this example is substantially similar to that in the second embodiment, except that the resonator coupling surfaces 300 of the filter in this example are curved surfaces different from those in the second embodiment.

Of course, the resonator coupling surfaces may be curved, planar, or a combination thereof.

Fourth embodiment, referring to fig. 7, the filter in this embodiment is a filter composed of a plurality of resonators, each resonator is disposed in a cavity in the filter housing in a one-to-one correspondence, and the structure in each cavity is as described in the previous embodiments. Are not described in detail herein; the filter may have one or more resonators as desired.

The communication equipment using the filter in the previous embodiments comprises an outer cover, an antenna array, the filter, a shielding cover, a PCB and a heat radiator which are arranged in sequence, wherein one external connecting pin of the filter is connected with the antenna, and the other external connecting pin of the filter passes through the shielding cover to be connected with the PCB.

Therefore, an adjusting screw rod of the traditional filter extending outside the resonant cavity is effectively omitted, the height of the filter is effectively reduced, and the installation space and the manufacturing cost are reduced; the requirement of small size and light weight of communication equipment is met.

It should be understood that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same, and those skilled in the art can modify the technical solutions described in the above embodiments, or make equivalent substitutions for some technical features; and that such modifications and substitutions are intended to be included within the scope of the appended claims.

Claims

1. A filter, including the cavity of the filter, resonator that lies in this cavity and the apron of lid on the cavity, characterized by:

the resonator can be rotatably arranged on the cover plate around the axial lead of the resonator and is suspended in the cavity; the resonator coupling surface on the bottom surface of the resonator is opposite to the cavity coupling surface on the bottom of the cavity, when the resonator is rotated, the distance between the resonator coupling surface and the cavity coupling surface is unchanged, and the effective coupling areas of the two coupling surfaces are correspondingly changed.

2. A filter according to claim 1, characterized in that:

3. A filter according to claim 1, characterized in that:

4. A filter according to claim 1, characterized in that:

5. A filter according to claim 1, characterized in that:

the resonator coupling surface comprises a planar surface or a curved surface.

6. A filter according to claim 1, characterized in that:

the cavity coupling surface comprises a plane or a curved surface and is arranged at a convex part or a concave part of the bottom surface of the cavity.

7. A filter according to claim 1, characterized in that:

8. The filter of claim 7, wherein:

the elastic device comprises a disc spring, an elastic pad or a rubber pad.

9. A filter according to claim 1, characterized in that:

10. Communication device applying a filter according to any of claims 1 to 9, characterized in that:

the communication equipment comprises an outer cover, an antenna array, a filter, a shielding cover, a PCB and a radiator which are sequentially arranged, wherein one external connecting pin of the filter is connected with the antenna, and the other external connecting pin penetrates through the shielding cover to be connected with the PCB.