CN109841934B - Enhanced capacitive coupling structure of filter and filter - Google Patents
Enhanced capacitive coupling structure of filter and filter Download PDFInfo
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- CN109841934B CN109841934B CN201910157359.2A CN201910157359A CN109841934B CN 109841934 B CN109841934 B CN 109841934B CN 201910157359 A CN201910157359 A CN 201910157359A CN 109841934 B CN109841934 B CN 109841934B
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Abstract
The invention provides an enhanced capacitive coupling structure of a filter, which comprises a cavity, a coupling flying rod and a support body, wherein the cavity is provided with a plurality of coupling flying rods; the support body is fixed in the cavity, the coupling flying rod is fixed on the support body, and two ends of the coupling flying rod are respectively provided with a non-metal material layer. Therefore, the capacitive coupling device can greatly increase the capacitive coupling and reduce the assembly difficulty and debugging difficulty of the product in a limited filter space range.
Description
Technical Field
The invention relates to the technical field of filters in the field of wireless communication, in particular to an enhanced capacitive coupling structure of a filter and the filter.
Background
With the gradual advance of 5G technology and the beginning of commercial use of 5G products, the demand of customers for 5G products and low-frequency filter products is more and more urgent. However, 5G products tend to be miniaturized, the structural space of the products is severely limited, and the conventional filter design scheme is difficult to meet the requirements of customers. Capacitive coupling of some products is difficult to be made strong due to the limitation of the spatial structure of the product, and especially, the product with wide bandwidth coupling and strong requirement is provided. Or the manufacturing cost of the product is too high, so that a lot of products cannot be normally produced in large quantity. With the current conventional design of capacitive coupling of the filter, the form of adding disks or increasing the length cannot be realized.
At present, the space given by customers of 5G miniaturized products and low-frequency band products is extremely limited, and the traditional filter design scheme has the following problems. (1) The space is small and capacitive coupling is difficult to realize. (2) The coupling support is very close to the resonant rod or the resonant disk, so that the reliability problem exists, and meanwhile, the consistency is poor.
In view of the above, the prior art is obviously inconvenient and disadvantageous in practical use, and needs to be improved.
Disclosure of Invention
In view of the above-mentioned drawbacks, an object of the present invention is to provide an enhanced capacitive coupling structure of a filter and a filter, which can greatly increase capacitive coupling and reduce assembly difficulty and debugging difficulty of a product in a limited space range.
In order to achieve the above object, the present invention provides an enhanced capacitive coupling structure of a filter, which includes a cavity, a coupling fly rod and a support; the support body is fixed in the cavity, the coupling flying rod is fixed on the support body, and two ends of the coupling flying rod are respectively provided with a non-metal material layer.
According to the enhanced capacitive coupling structure of the filter, the non-metal material layer is made of ceramic medium, silica gel or plastic.
According to the enhancement type capacitive coupling structure of the filter, the non-metal material layer is of a hollow shell structure.
According to the enhancement type capacitive coupling structure of the filter, the thickness of the non-metal material layer is 0.1-2 mm.
According to the enhanced capacitive coupling structure of the filter, the thickness of the non-metal material layer is 1 mm.
According to the enhanced capacitive coupling structure of the filter, the supporting body is fixed in the clamping groove of the cavity.
According to the enhanced capacitive coupling structure of the filter, the coupling flying bar is made of metal, and the coupling flying bar is fixed at the middle position of the supporting body.
The enhancement type capacitive coupling structure of the filter further comprises a cover plate, and the cover plate is fixed on the cavity.
The enhanced capacitive coupling structure of the filter further comprises at least one resonant rod and at least one resonant platform, wherein the resonant platform is fixed in the cavity, the resonant rod penetrates through the cover plate and is installed on the resonant platform, and the resonant rod is fixed on the cover plate through a locking nut.
The invention also provides a filter comprising the enhanced capacitive coupling structure.
The two ends of the coupling flying rod of the enhanced capacitive coupling structure of the filter are respectively provided with the non-metal material layers so as to increase the capacitive coupling of the coupling flying rod, thereby shortening the length of the coupling flying rod within a limited space range, greatly increasing the capacitive coupling, and simultaneously reducing the assembly difficulty and debugging difficulty of the product so as to meet the design target requirement of the product.
Drawings
Fig. 1 is a schematic diagram of the structure of the enhanced capacitive coupling structure of the filter of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that references in the specification to "one embodiment," "an example embodiment," etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not intended to refer to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to effect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
Moreover, where certain terms are used throughout the description and following claims to refer to particular components or features, those skilled in the art will understand that manufacturers may refer to a component or feature by different names or terms. This specification and the claims that follow do not intend to distinguish between components or features that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. In addition, the term "connected" as used herein includes any direct and indirect electrical connection. Indirect electrical connection means include connection by other means.
Fig. 1 shows the principle structure of the enhanced capacitive coupling structure of the filter of the present invention, which includes a cavity 6, a coupling fly rod 8 and a support body 1. The support body 1 is fixed in the cavity 6, the coupling flying rod 8 is fixed on the support body 1, and two ends of the coupling flying rod 8 are respectively provided with the non-metal material layers 7. According to the invention, the nonmetal material layers 7 are added at the two ends of the coupling flying rod 8, so that the capacitive coupling of the coupling flying rod 8 can be greatly increased, and the stronger capacitive coupling can be realized in a cavity with limited space or a miniaturized 5G product, thereby achieving the design target requirement of the product.
The invention not only breaks the conventional design thought of the filter, but also can more conveniently and reliably realize strong capacitive coupling, and can not be influenced by the structural space, thereby achieving the required coupling strength, avoiding the problem of reliability risk caused by a very special structural form, and improving the competitiveness of the product.
In this embodiment, the non-metal material layer 7 is a hollow shell structure. Preferably, the non-metallic material layer 7 is made of a material such as ceramic dielectric, silicon gel or plastic (e.g., teflon). It should be reminded that the material of the non-metal material layer 7 of the present invention is not limited to ceramic dielectric, silica gel or plastic, and can be any non-metal insulating material. The non-metallic material layer 7 can greatly increase the capacitive coupling of the coupling flying bar 8, thereby reducing the design requirement of the capacitive coupling support body of a miniaturized product with limited space.
Preferably, the thickness of the non-metallic material layer 7 is 0.1-2 mm, and the effect of enhancing capacitive coupling can be achieved by proper thickness. Most preferably, the thickness of the non-metallic material layer 7 is 1 mm.
Preferably, the coupling fly rod 8 is made of metal, and the coupling fly rod 8 is fixed at a middle position of the support body 1. In the present embodiment, the supporting body 1 is fixed in the slot of the cavity 6.
Preferably, the enhanced capacitive coupling structure of the filter further comprises a cover plate 2, and the cover plate 2 is fixed on the cavity 6. The cover plate 2 can be installed and fixed on the surface of a wall body.
Preferably, the enhanced capacitive coupling structure of the filter further comprises at least one resonant rod 3 and at least one resonant platform 5, the resonant platform 5 is fixed in the cavity 6, the resonant rod 3 is installed on the resonant platform 5 through the cover plate 2, and the resonant rod 3 is fixed on the cover plate 2 through the lock nut 4. Of course, the resonant rod 3 can be fixed on the cover plate by other connecting methods such as welding.
The invention also provides a filter comprising the enhanced capacitive coupling structure.
The enhancement type capacitive coupling structure of the filter is suitable for the design of a space structure with limited form, or a low-frequency-band cavity, or a wider coupling bandwidth, or a 5G miniaturized product.
In summary, the two ends of the coupling flying rod of the enhanced capacitive coupling structure of the filter of the present invention are respectively provided with the non-metallic material layer to increase the capacitive coupling of the coupling flying rod, thereby shortening the length of the coupling flying rod within a limited space range, not only greatly increasing the capacitive coupling, but also reducing the assembly difficulty and the debugging difficulty of the product, so as to achieve the target requirement of the product design.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. An enhanced capacitive coupling structure of a filter is characterized by comprising a cavity, a coupling flying rod and a support body; the supporting body is fixed in the cavity, the coupling flying rod is fixed on the supporting body, and two ends of the coupling flying rod are respectively provided with a non-metal material layer; the non-metal material layer is of a hollow shell structure; the thickness of the non-metal material layer is 0.1-2 mm; the coupling flying bar is made of metal.
2. The enhanced capacitive coupling structure of claim 1 wherein said layer of non-metallic material is made of ceramic dielectric, silica gel or plastic.
3. The enhanced capacitive coupling structure of claim 1 wherein said layer of non-metallic material is 1 millimeter thick.
4. The enhanced capacitive coupling structure of claim 1, wherein the support is fixed in a slot of the cavity.
5. The enhanced capacitive coupling structure of claim 1 wherein said coupling flybar is fixed at a central location of said support.
6. The filter enhanced capacitive coupling structure of claim 1 further comprising a cover plate secured to said cavity.
7. The enhanced capacitive coupling structure of claim 1, further comprising at least one resonating bar and at least one resonating table, wherein the resonating table is fixed in the cavity, the resonating bar is mounted on the resonating table through the cover plate, and the resonating bar is fixed on the cover plate through a locking nut.
8. A filter comprising an enhanced capacitive coupling structure as claimed in any one of claims 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910157359.2A CN109841934B (en) | 2019-03-01 | 2019-03-01 | Enhanced capacitive coupling structure of filter and filter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910157359.2A CN109841934B (en) | 2019-03-01 | 2019-03-01 | Enhanced capacitive coupling structure of filter and filter |
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| Publication Number | Publication Date |
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| CN109841934A CN109841934A (en) | 2019-06-04 |
| CN109841934B true CN109841934B (en) | 2021-10-22 |
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| CN113725569A (en) * | 2021-09-13 | 2021-11-30 | 宁波华瓷通信技术股份有限公司 | Filter coupling quantity reinforcing structure |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205921059U (en) * | 2016-08-03 | 2017-02-01 | 武汉凡谷电子技术股份有限公司 | Cavity filter who contains adjustable capacitance coupling structure |
| CN206820097U (en) * | 2017-05-27 | 2017-12-29 | 罗森伯格技术（昆山）有限公司 | A kind of wave filter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8217737B2 (en) * | 2009-10-30 | 2012-07-10 | Alcatel Lucent | Coupler for tuning resonant cavities |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205921059U (en) * | 2016-08-03 | 2017-02-01 | 武汉凡谷电子技术股份有限公司 | Cavity filter who contains adjustable capacitance coupling structure |
| CN206820097U (en) * | 2017-05-27 | 2017-12-29 | 罗森伯格技术（昆山）有限公司 | A kind of wave filter |
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| CN109841934A (en) | 2019-06-04 |
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