WO2017096534A1

WO2017096534A1 - Cross-coupling device for filters, and filter

Info

Publication number: WO2017096534A1
Application number: PCT/CN2015/096708
Authority: WO
Inventors: 胡健; 田涛; 张亚明; 沈振
Original assignee: 华为技术有限公司
Priority date: 2015-12-08
Filing date: 2015-12-08
Publication date: 2017-06-15
Also published as: CN108370076A; CN108370076B

Abstract

Embodiments of the present invention provide a cross-coupling device for filters, and a filter. The cross-coupling device for filters comprises: a cross-coupling rod for cross-coupling and a fixing block for fixing the cross-coupling rod. The cross-coupling device is embedded in an opening provided on a separation rib between a first cavity and a second cavity in a filter, so that a first side of the fixing block is located in the first cavity and a second side of the fixing block is located in the second cavity. In the embodiments of the present invention, by embedding a cross-coupling device in an opening provided on a separation rib between two cavities of a filter, the effective space occupied by the cross-coupling device in the cavities is reduced, thereby facilitating miniaturization design of the filter while improving the performance of the filter.

Description

Filter cross-coupling device and filter

Technical field

The present invention relates to the field of communications, and more particularly to cross-coupling devices and filters for filters.

Background technique

There are generally two transmission paths in the energy transfer of a filter, one is a coupling path between adjacent cavities, and the other is a cross-coupling path between non-adjacent cavities, which can enhance the band of the filter. External suppression, the cross-coupling path can be achieved by providing a cross-coupling device. At present, the structure of the cross-coupling device of the Transverse Magnetic (TM) mode dielectric filter is relatively complicated, and the cross-coupling device needs to be installed and fixed by adding a fixing device to the cavity of the TM mode dielectric filter. As shown in FIG. 1, in the implementation of the TM mode dielectric filter, the

fixed bosses

305 and 307 on which the cross-coupled sheets are mounted are respectively fabricated in the cavity requiring cross-coupling, and the cross-coupling consisting of 3041, 3042 and 3043 is performed. The sheets 304 are respectively mounted and fixed to the

bosses

305 and 307 by screws 306, wherein the

mounting bosses

305 and 307 of the screws project a part of the structure on the cavity in order to support the cross-coupling piece 304. Since the fixing device (i.e., the bosses 305 and 307) occupies more effective use space of the cavity, the performance of the resonator is degraded, and the filter is also miniaturized.

Summary of the invention

Embodiments of the present invention provide a cross-coupling device and a filter of a filter, which can improve the performance of the filter and facilitate the miniaturization design of the filter.

In a first aspect, a cross-coupling device for a filter is provided, comprising: a cross-coupling rod for cross-coupling and a fixed block for fixing the cross-coupling rod, the cross-coupling device being used for embedding in a filter An opening provided on the spacer between the first cavity and the second cavity such that a first side of the fixed block is located in the first cavity, and a second side of the fixed block is located in the second cavity .

In the embodiment of the present invention, by embedding the cross-coupling device in the opening provided on the isolation rib between the two cavities of the filter, the effective space occupied by the cross-coupling device in the cavity is reduced, thereby improving the performance of the filter. At the same time, it is conducive to the miniaturization of the filter.

In addition, since the cross-coupling structure of the embodiment of the present invention does not need to process the boss and the threaded hole in the cavity of the filter, the processing process can be reduced. Moreover, the cross coupling of the embodiment of the present invention The device can be flexibly separated from the cavity by an opening embedded in the barrier rib between the two chambers.

With reference to the first aspect, in a first possible implementation, the fixing block is provided with a groove or a hole, and the cross-coupling rod penetrates the fixing block through the groove or the hole, the cross-coupling rod Extending the first length of the first side of the fixing block and then bending and folding back in a first direction to fix the first end on the first side of the fixing block, the cross-coupling rod extending out The second length preset by the second side of the fixing block is bent back and folded back in a second direction opposite to the first direction to fix the second end on the second side of the fixing block.

With reference to the first aspect or the first possible implementation, in a second possible implementation, a fixing hole is respectively disposed on the first side and the second side of the fixing block, and the first end of the cross coupling rod A fixing hole inserted into the first side is fixed, and a second end of the cross-coupling rod is inserted into a fixing hole on the second side for fixing.

Alternatively, the end of the cross-coupling rod and the fixing hole on the fixing block may be fixed by welding.

In the embodiment of the present invention, by fixing the end portion of the cross-coupling rod into the fixing hole of the fixing block, the fixing is avoided by using another mounting device (such as a screw), the material is saved, the cost is reduced, and the height is improved. Assembly efficiency.

In combination with the first aspect or the first or second possible implementation manner, in a third possible implementation, at least one of the two sides of the fixing block facing the isolation rib at the opening A limited structure is fixed at the side position for fixing.

In the embodiment of the invention, the fixing block and the spacer rib can be better fixed by providing the limiting structure on the fixing block.

In a second aspect, a filter is provided, comprising: a cavity having a plurality of cavities, wherein at least two of the plurality of cavities are disposed between the first aspect or any of the possible implementations described above Cross-coupling device for the filter.

In conjunction with the second aspect, in a first possible implementation of the second aspect, an opening is formed in the spacer between the two chambers, and the cross-coupling device is embedded in the opening.

Optionally, the filter is a TM mode dielectric filter.

DRAWINGS

1 is a schematic diagram of a cross-coupling device in a prior art filter;

2 is a schematic structural diagram of a cross-coupling device of a filter according to an embodiment of the present invention;

3 is a schematic perspective view of a cross-coupling device of a filter in accordance with an embodiment of the present invention;

4 is a schematic perspective view of a fixing block of a cross-coupling device of a filter according to an embodiment of the present invention;

5 is a schematic diagram of a cross-coupling rod of a cross-coupling device of a filter according to an embodiment of the present invention;

Figure 6 is a schematic perspective view of a filter in accordance with an embodiment of the present invention.

Figure 7 is a schematic top plan view of a filter in accordance with an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be described below with reference to the accompanying drawings in the embodiments of the present invention.

FIG. 2 is a schematic structural diagram of a cross-coupling device 200 of a filter according to an embodiment of the present invention. 3 is a schematic perspective view of a cross-coupling device 200 of a filter in accordance with an embodiment of the present invention. As shown in FIG. 2 or FIG. 3, the cross-coupling device 200 includes a cross-coupling rod 210 for cross-coupling and a fixed block 220 for securing the cross-coupling rod 210. The cross-coupling rods 210 and the fixing blocks 220 may be made of a metal material, and the metal materials may be the same or different.

It should be noted that the cross-coupling rod 210 and the fixing block 220 may also be made of a metal-plated material. The internal material of the embodiment of the present invention is not limited. For example, the internal material may be metal or non-metal.

For example, the metal material of the cross-coupling rod 210 may be silver plated on the copper surface, and the metal material of the fixing block 220 may be silver plated on the aluminum surface.

As shown in FIG. 2 to FIG. 4, the fixing block 220 is provided with a groove 221 through which the cross-coupling rod 210 can pass through the fixing hole 220. However, the embodiment of the present invention is not limited thereto. The fixing block 220 may further be provided with a hole, and the fixing block 210 may pass through the fixing block 220 through the hole.

The cross-coupling rod 210 extends from a predetermined length of one side of the fixing block 220 and then is bent and folded back in the first direction so that one end is fixed on one side of the fixing block 220, and the cross-coupling rod 210 protrudes from the other side of the fixing block 220. The predetermined length is then bent in a second direction opposite to the first direction and then folded back so that the other end is fixed on the other side of the fixed block.

The direction in which the cross-coupling rod 210 protrudes from the fixed block 220 is away from the fixed block 220, and the direction of the foldback is in the direction of the fixed block 220. In other words, the direction of the foldback may be opposite to the direction in which the cross-coupling rod 210 protrudes from the fixed block 220. It can be understood that it can be the opposite of a plane, It can also be the opposite of the three-dimensional dimension.

The portions of the cross-coupling rod 210 extending from both sides of the fixing block 220 may respectively have a U-shaped bent structure, as shown in FIG. 2 or FIG. The embodiment of the present invention does not limit the angle of the bend in the U-shaped bending structure, and may be, for example, a right angle bend or a round corner bend.

The first direction and the second direction may be opposite directions on the same plane, or may be opposite directions on different planes. In other words, the cross-coupling bar 210 may be a planar structure or a three-dimensional structure, which is not limited by the embodiment of the present invention.

Optionally, the cross-coupling rod 210 extends through the fixed block 220 in a third direction, wherein the third direction is perpendicular to the first direction and the second direction, respectively.

At this time, the cross-coupling rod 210 is S-shaped as shown in FIG.

It should be noted that the cross-coupling rod 210 may have a cylindrical shape, a square column shape, or a sheet shape.

As shown in FIG. 6, the cross-coupling device 200 is used to embed the opening provided in the spacer rib 300 between the two cavities 100 in the filter, so that the two sides of the fixing block 220 fixed to the cross-coupling rod 210 are respectively located at two. In the cavity 100, FIG. 7 is a schematic plan view. It should be understood that only the two cavities in which the cross-coupling device 200 is mounted are shown in Figures 6 and 7, and the filter may also include other cavities.

The spacer ribs 300 are used to isolate the two cavities 100. The spacer ribs 300 may be made of a metal material such as aluminum. In the embodiment of the present invention, in order to embed the cross-coupling device on the spacer rib 300, an opening may be provided in the spacer rib 300 to embed the cross-coupling device 200 in the opening.

The height of the fixing block 220 may be the same as the height of the isolation bar 300. At this time, the height of the opening of the isolation bar 300 is the same as the height of the isolation bar 300. Alternatively, the height of the fixing block 220 is smaller than the height of the spacer rib, and at this time, an opening is provided in the upper half of the spacer rib 300, and the height at the opening is the same as the height of the fixed block 220.

The shape of the fixing block 220 is not limited in the embodiment of the present invention, as long as the fixing block can be embedded in the opening provided on the spacer between the two cavities. For example, the fixing block 220 may be a rectangular parallelepiped, a cylindrical body, an elliptical cylinder or the like. It should be understood that the shape and size of the opening provided in the spacer rib may be adapted to the shape size of the fixed block 220.

In the embodiment of the present invention, by providing an opening in the spacer between the two cavities, the fixing block for fixing the cross-coupling rod in the cross-coupling device is embedded in the opening of the isolation rib of the two cavities, thereby reducing the cross-coupling. The effective space occupied by the device in the cavity can improve the performance of the filter and facilitate the miniaturization of the filter.

In addition, since the cross-coupling structure of the embodiment of the present invention does not need to process the mounting boss and the threaded hole in the cavity of the filter, the processing process can be reduced. Moreover, the cross-coupling device of the embodiment of the invention is embedded in the opening of the spacer between the two cavities, and does not need to be fixed by using additional fixing elements (such as screws), has a simple structure, is simple to assemble, and can be flexibly separated from the cavity. .

Moreover, the coupling strength can be adjusted by adjusting the length of the cross-coupling rod 210. Since the cross-coupling device 200 is embedded in the spacer rib 300, it is not required to be fixed by an additional fixing member (such as a screw), and thus can be flexibly separated from the cavity of the filter. So that it is easy to adjust the strength of the coupling. For example, the cross-coupling device in the filter can be replaced as a whole with a cross-coupling device having a different cross-coupling rod length. Alternatively, the cross-coupling rods in the cross-coupling device can be replaced with cross-couplers of different lengths.

A resonator 101 is disposed in the cavity 100.

Optionally, two fixing holes 222 are respectively disposed on the two sides of the fixing block 220 fixed to the cross-coupling rod 210, and two ends of the cross-coupling rod 210 are respectively inserted into the two fixing holes 222 for fixing.

The fixing hole 222 is used for fixing the cross-coupling rod 210. The depth, position and shape of the fixing hole 222 are not limited in the embodiment of the present invention.

Alternatively, the end of the cross-coupling rod 210 and the fixing hole 222 on the fixing block 220 may be fixed by welding. The end portion of the cross-coupling rod 210 and the fixing block 220 may be directly fixed by welding, which is not limited in the embodiment of the present invention.

At this point, the coupling strength can be adjusted by replacing the cross-coupling device. For example, when it is necessary to adjust the coupling strength, the cross-coupling device is taken out of the filter and another cross-coupling device having a different length of the cross-coupling rod is mounted.

It should be understood that the end of the cross-coupling rod 210 can also be fixed to the fixing hole 222 on the fixing block 220 in other detachable manners. The coupling strength can be modulated by replacing the cross-coupling rod at this time.

Optionally, a fixing structure is fixed on the fixing block 220 at a position of at least one of the two side positions facing the isolation ribs 300 at the opening.

The implementation of the present invention is not limited to the limiting structure. For example, the limiting structure may be the limiting slot 223 shown in FIG. 2 to FIG. 4, and may also be other limiting structures capable of fixing the fixing block 220 and the spacer 300. .

For example, the width of the limiting groove 223 may be greater than or equal to the thickness of the spacer rib 300. Thus, the limiting slot 223 can clamp the spacer rib 300 in the limiting slot 223, thereby causing the cross-coupling device 200 The fixed block 220 in the middle can be better fixed with the spacer ribs 300.

Another embodiment of the present invention also provides a filter comprising: a cavity having a plurality of cavities between which at least two of the plurality of cavities are provided with a cross-coupling device 200 in accordance with an embodiment of the present invention.

Optionally, an opening is provided in the spacer between the two cavities, and the cross-coupling device 200 is embedded in the opening.

Optionally, the filter is a TM mode dielectric filter. However, the embodiment of the present invention is not limited thereto. For example, the filter may also be a Transverse Electric (TE) mode dielectric filter.

The above is only a preferred embodiment of the technical solution of the present invention, and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

A cross-coupling device for a filter, comprising:

a cross-coupling rod for cross-coupling and a fixed block for fixing the cross-coupling rod,

The cross-coupling device is configured to be embedded in an opening provided on the spacer between the first cavity and the second cavity in the filter such that a first side of the fixed block is located in the first cavity, the fixed block The second side is located in the second cavity.
The cross-coupling device according to claim 1, wherein

a groove or a hole is disposed on the fixing block, the cross-coupling rod penetrates the fixing block through the groove or the hole, and the cross-coupling rod protrudes from the first side of the fixing block to be preset first After the length is bent in the first direction and then folded back, the first end is fixed on the first side of the fixing block, and the cross-coupling rod protrudes from the second side of the fixing block to be preset by the second length. The second direction opposite to the first direction is bent and then folded back to fix the second end on the second side of the fixing block.
The cross-coupling device according to claim 1 or 2, wherein a fixing hole is respectively disposed on the first side and the second side of the fixing block, and the first end of the cross-coupling rod is inserted into the first side The upper fixing hole is fixed, and the second end of the cross-coupling rod is inserted into the fixing hole on the second side for fixing.
The cross-coupling device according to any one of claims 1 to 3, wherein a limit position is set at at least one of two side positions on the fixed block opposite to the spacer at the opening The structure is fixed.
A filter, comprising:

A cavity having a plurality of cavities, and at least two of the plurality of cavities are provided with the cross-coupling device according to any one of claims 1 to 4.
A filter according to claim 5, wherein an opening is provided in the spacer between the two chambers, and the cross-coupling means is embedded in the opening.