CN220122079U - Filter and communication device - Google Patents
Filter and communication device Download PDFInfo
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- CN220122079U CN220122079U CN202321707176.1U CN202321707176U CN220122079U CN 220122079 U CN220122079 U CN 220122079U CN 202321707176 U CN202321707176 U CN 202321707176U CN 220122079 U CN220122079 U CN 220122079U
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- pass structure
- insulating
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- 238000004891 communication Methods 0.000 title claims abstract description 13
- 238000009413 insulation Methods 0.000 claims abstract description 24
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 238000013461 design Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 238000009434 installation Methods 0.000 description 9
- 230000002950 deficient Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 230000003796 beauty Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
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Abstract
The utility model discloses a filter and a communication device, wherein the filter comprises a cavity, a cover plate and a low-pass structure, the cavity is provided with a mounting groove for mounting the low-pass structure, the low-pass structure comprises a high-impedance part and a low-impedance part which are sequentially and alternately connected, the filter also comprises an insulation component and an adjusting screw, the insulation component is arranged between the low-pass structure and the inner wall of the mounting groove, the low-pass structure and the mounting groove are insulated, and at least one opening opposite to the high-impedance part is arranged on the insulation component; the adjusting screw is arranged on the cover plate or the cavity, penetrates through the opening and is arranged corresponding to the high-impedance part. Through the design, the impedance matching of the low-pass structure can be changed, and the effect of adjusting indexes such as out-of-band rejection of the low-pass structure is further achieved, so that the influence caused by part tolerance is eliminated, and the problem that the out-of-band rejection is poor in the product is avoided.
Description
Technical Field
The present utility model relates to the field of communications, and in particular, to a filter and a communication device.
Background
With the rapid development of wireless communication technology, a higher requirement is put on the high-frequency harmonic suppression performance of communication equipment such as a communication base station, and at present, a low-pass structure is installed in a filter to suppress the far-end harmonic outside the pass band.
The existing filter generally comprises a cavity, a cover plate, a low-pass structure and an insulating sleeve, wherein the low-pass structure is generally formed by matching a metal coaxial inner core with alternately cascaded thickness with a coaxial outer wall to respectively realize equivalent parallel capacitance and series inductance, and the low-pass structure is arranged in an installation groove of the cavity. Because the size tolerance exists among the cavity, the cover plate, the low-pass structure, the insulating sleeve and other parts, the difference of the same product is easily caused, and the out-of-band rejection of the filter product is poor.
Disclosure of Invention
The utility model aims to provide a filter and a communication device, so as to avoid the problem of bad out-of-band rejection of the filter.
The utility model discloses a filter, which comprises a cavity, a cover plate and a low-pass structure, wherein the cavity is provided with a mounting groove for mounting the low-pass structure, and the low-pass structure comprises a high-impedance part and a low-impedance part which are alternately connected in sequence; the filter further comprises an insulation component and an adjusting screw, wherein the insulation component is arranged between the low-pass structure and the inner wall of the mounting groove, insulates the low-pass structure from the mounting groove, and is provided with at least one opening opposite to the high-impedance part; the adjusting screw is arranged on the cover plate or the cavity, penetrates through the opening and is arranged corresponding to the high-impedance part.
Optionally, the insulation component includes a plurality of insulation short pipes, where the insulation short pipes are arranged in one-to-one correspondence with the low impedance parts and encircle the low impedance parts to insulate the low impedance parts from the mounting groove; the gap between adjacent insulating stubs forms the opening.
Optionally, the length of the insulating stub is greater than the length of the low impedance portion.
Optionally, the insulating assembly is an integral insulating sleeve surrounding the high-impedance portion and the low-impedance portion simultaneously to insulate the low-impedance portion from the mounting groove; the insulating sleeve is hollowed out in the area corresponding to the high-impedance part to form the opening.
Optionally, the insulating component is provided with one opening corresponding to each high-impedance part, and the filter is provided with one adjusting screw corresponding to each high-impedance part.
Optionally, the adjusting screws are all arranged on the cover plate and positioned on the same straight line; or, the adjusting screws are all arranged on the cavity and positioned on the same straight line.
Optionally, a plurality of the adjusting screws are all of the same model specification.
Optionally, the insulating component is an insulating coating sprayed on the low-pass structure; or the insulating component is a heat shrinkage tube sleeved on the low-pass structure; or the insulating component is an insulating tube sleeved on the low-pass structure.
Optionally, the low impedance portion has a circular or square cross section.
The utility model also discloses a communication device, which comprises the filter.
According to the utility model, the opening is arranged in the area of the insulating assembly corresponding to the high-impedance part, the adjusting screw corresponding to the opening is additionally arranged on the filter, and the depth of the adjusting screw in the mounting groove is changed by rotating the adjusting screw, so that the impedance matching of the high-impedance part is adjusted, and the effect of adjusting the low-pass structural index is further achieved, thereby eliminating the influence caused by part tolerance and avoiding the problem of out-of-band rejection of the filter product. Moreover, the index of the low-pass structure can be directly regulated by rotating the regulating screw outside the cavity, so that the influence caused by part tolerance is eliminated, and the cover removing and maintenance of defective products are not required, and the maintenance cost is greatly reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model. It is evident that the figures in the following description are only some embodiments of the utility model, from which other figures can be obtained without inventive effort for a person skilled in the art. In the drawings:
FIG. 1 is a schematic cross-sectional view of a filter according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of an embodiment of an opening design;
fig. 3 is a schematic diagram of an embodiment of another opening design.
10, a filter; 100. a cavity; 101. a mounting groove; 200. a cover plate; 300. a high impedance section; 400. a low impedance section; 500. an insulating assembly; 510. an insulating short tube; 520. an opening; 530. an insulating sleeve; 600. and adjusting the screw.
Detailed Description
It is to be understood that the terminology used herein, the specific structural and functional details disclosed are merely representative for the purpose of describing particular embodiments, but that the utility model may be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.
Terms of orientation or positional relationship such as "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like are described based on the orientation or relative positional relationship shown in the drawings, are merely for convenience of description of the present utility model, and do not indicate that the apparatus or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
The present utility model will be described in detail below with reference to the drawings and the optional embodiments, and it should be noted that, without conflict, new embodiments may be formed by any combination of the embodiments or technical features described below.
As shown in fig. 1 to 3, as a filter provided in an embodiment of the present utility model, the filter 10 includes a cavity 100, a cover plate 200 covering the cavity 100, and a low-pass structure. The low-pass structure includes high-impedance portions 300 and low-impedance portions 400 alternately connected in sequence, wherein the cross-sectional area of the high-impedance portions 300 is smaller than the cross-sectional area of the low-impedance portions 400. The cavity 100 is internally provided with a mounting groove 101, and the low-pass structure is mounted in the mounting groove 101.
The mounting groove 101 may be an integral structure with the cavity 100, for example, the mounting groove 101 may be molded in a mold together with the cavity 100 during the manufacturing process of the cavity 100, and for example, the cavity 100 may be machined first, and then the mounting groove 101 may be machined on the cavity 100. The mounting groove 101 may be connected to the cavity 100 separately, for example, a hollow cylindrical structure or a box-shaped structure is connected to the inner wall of the cavity 100 by welding, screwing, or the like, and at this time, a space enclosed by the inner wall of the cylindrical structure or the box-shaped structure is the mounting groove 101. The embodiment of the present utility model is not limited to the specific form of the installation groove 101.
The filter 10 further includes an insulation assembly 500 and an adjusting screw 600, the insulation assembly 500 being disposed between the low-pass structure and the inner wall of the mounting groove 101 to avoid contact between the low-pass structure and the inner wall of the mounting groove 101 to insulate the low-pass structure from the mounting groove 101, and in particular, to insulate the low-impedance portion 400 from the mounting groove 101. The insulating assembly 500 is provided with at least one opening 520 opposite to the high-impedance portion 300, and since the cross-sectional area of the low-impedance portion 400 is larger than the cross-sectional area of the high-impedance portion 300, when the low-pass structure is mounted in the mounting groove 101, the low-impedance portion 400 abuts against the inner wall of the mounting groove 101 through the insulating assembly 500, and the position of the high-impedance portion 300 is suspended, that is, the space between the high-impedance portion 300 and the wall of the mounting groove 101, and when the insulating assembly 500 insulates the low-pass structure from the mounting groove 101, particularly when the insulating assembly 500 insulates the low-impedance portion 400 from the mounting groove 101, the high-impedance portion 300 can be insulated from the mounting groove 101 based on the space between the high-impedance portion 300 and the wall of the mounting groove 101, so that the position of the insulating assembly 500 corresponding to the high-impedance portion 300 is provided with the opening 520, and the insulating effect between the low-pass structure and the mounting groove 101 is not affected.
The adjusting screw 600 is disposed on the cover plate 200 or the cavity 100, corresponding to the high impedance part 300, and may be disposed on a side wall or a bottom wall of the cavity 100 when the adjusting screw 600 is disposed on the cavity 100; the specific installation position of the adjusting screw 600 may be determined according to the structure and position of the installation groove 101 and the position of the low-pass structure; in the embodiment of the present utility model, as shown in fig. 1, the adjusting screw 600 is disposed on the cover plate 200, and at this time, the cover plate 200 covers the notch on one side of the mounting groove 101, and the low-pass structure is insulated from the cover plate 200 by the insulation assembly 500, and in particular, the low-impedance portion 400 is insulated from the cover plate 200 by the insulation assembly 500, and the high-impedance portion 300 is spaced from the cover plate 200.
The adjusting screw 600 penetrates the opening 520, i.e., the adjusting screw 600 may protrude into the mounting groove 101 at the opening 520, and the adjusting screw 600 is disposed corresponding to and spaced apart from the high-impedance portion 300. The impedance matching of the low-pass structure is changed by controlling the length of the adjusting screw 600 extending into the mounting groove 101 and further changing the relative distance between the adjusting screw 600 and the high-impedance part 300.
According to the embodiment of the utility model, the opening 520 is arranged in the area of the insulating assembly 500 corresponding to the high-impedance part 300, the adjusting screw 600 corresponding to the opening 520 is additionally arranged on the filter 10, and the adjusting screw 600 is rotated to change the depth of the adjusting screw 600 in the mounting groove 101, so that the impedance matching of the high-impedance part 300 is adjusted, the impedance matching of the low-pass structure is changed, the effect of adjusting the radio frequency index of the low-pass structure is further achieved, the influence caused by part tolerance is eliminated, and the problem that the filter 10 has poor out-of-band suppression is avoided. Moreover, since the embodiment of the present utility model directly eliminates the influence caused by the tolerance of the parts by operating the rotation adjusting screw 600 outside the filter 10, the cap removing and repairing of defective products are not required, thereby greatly reducing the repairing cost.
In the embodiment of the present utility model, the low impedance part 400 of the low-pass structure may have a square or rectangular cross section; the low impedance portion 400 of the low-pass structure may have a circular cross section. Of course, the cross section of the low impedance portion 400 may be other shapes, which are not limited herein.
For the insulation assembly 500 in the embodiment of the present utility model, the insulation coating directly sprayed on the inner wall of the installation groove 101 of the cavity 100 may be an insulation coating sprayed on the low-pass structure, especially sprayed on the low-impedance portion 400, a heat shrinkage tube directly sleeved on the low-pass structure, especially sleeved on the low-impedance portion 400, an insulation tube (such as an insulation tube made of hard plastic, rubber, ceramic, etc.) with certain structural strength and supporting effect directly sleeved on the low-pass structure, especially sleeved on the low-impedance portion 400, or other forms may be adopted. It will be appreciated that the low pass structure or mounting groove 101 is not provided with the above-described insulating coating, heat shrink tube, insulating tube, or like material or structure at the location of the opening 520.
In the embodiment of the present utility model, the insulating assembly 500 may be provided with one opening 520 corresponding to only one high impedance portion 300, may be provided with a plurality of openings 520 corresponding to a plurality of high impedance portions 300, or may be provided with one opening 520 corresponding to each high impedance portion 300.
When there are a plurality of openings 520, one adjusting screw 600 may be disposed corresponding to each opening 520, or only one or a part of the openings 520 may be disposed corresponding to the adjusting screw 600. That is, the number of the adjusting screws 600 is also one or more, the adjusting screws 600 may be provided only at the cover plate 200 or the cavity 100 corresponding to the high impedance portion 300 of one or a part thereof, and then the impedance matching of the low-pass structure may be changed only by adjusting the one or more adjusting screws 600.
In addition, when the filter 10 is provided with a plurality of adjusting screws 600, the adjusting screws 600 may be disposed on the cover plate 200, or may be disposed on the side wall or the bottom wall of the cavity 100, and the adjusting screws 600 are all on the same straight line, so as to facilitate design and adjustment, and ensure the beauty of the product. Moreover, the adjusting screws 600 can be of the same model specification, so that the installation is convenient; of course, different model specifications can be adopted, so that the portable electronic device is suitable for various use environments.
Optionally, the insulating assembly 500 is provided with an opening 520 corresponding to each high impedance portion 300, and an adjusting screw 600 is disposed at the position of the cover plate 200 or the cavity 100 corresponding to each high impedance portion 300, based on this, the impedance matching of the low-pass structure can be changed by adjusting individual or all adjusting screws 600 therein, so that the adjusting range is wide, the debugging process is convenient, and the problem that the required radio frequency index cannot be aligned only by one or a few adjusting screws 600 is avoided.
The following two embodiments are specifically described herein, and it should be noted that the opening 520 in the embodiment of the present utility model is not limited to these two designs.
As an embodiment of the opening 520, as shown in fig. 2, the insulating assembly 500 is composed of a plurality of insulating short pipes 510 spaced apart and arranged in parallel, each insulating short pipe 510 is independent, the insulating short pipes 510 are arranged in one-to-one correspondence with the low impedance portions 400, and only the corresponding low impedance portions 400 are surrounded and sleeved to insulate the low impedance portions 400 from the inner wall of the mounting groove 101; the high impedance portion 300 is not provided with the insulating stub 510 or other insulating medium, and thus, a gap between adjacent insulating stubs 510 faces the high impedance portion 300, and an opening 520 corresponding to the high impedance portion 300 is formed.
In the present embodiment, the length of the insulation stub 510 is longer than the length of the low impedance portion 400. When the mounting deviation occurs, the insulating stub 510 can also wrap the corresponding low-resistance portion 400, avoiding the end of the low-resistance portion 400 from contacting the inner wall of the mounting groove 101.
In this embodiment, since the insulating short tube 510 is sleeved on the low impedance part 400 only, each high impedance part 300 is not separated from the inner wall of the installation groove 101 by the insulating medium, at this time, one adjusting screw 600 may be provided at the cover plate 200 or the cavity 100 corresponding to each high impedance part 300, and then the impedance matching of the low-pass structure may be changed by adjusting individual or all of the adjusting screws 600 therein.
As another embodiment of the opening 520, as shown in fig. 3, the insulating assembly 500 is a one-piece insulating sleeve 530, and the insulating sleeve 530 surrounds both the high impedance part 300 and the low impedance part 400 to insulate the low impedance part 400 from the inner wall of the mounting groove 101; by partially digging through the insulating sleeve 530, the area of the insulating sleeve 530 corresponding to the high-impedance portion 300 is hollowed out to form the opening 520.
In this embodiment, it is only necessary to ensure that the area of the hollowed-out area of the insulating sleeve 530 is larger than the cross-sectional area of the adjusting screw 600, so that the adjusting screw 600 can extend into the mounting groove 101. With the design of the present embodiment, the insulating member 500 and each low impedance portion 400 can be mounted together with only one mounting, which is advantageous in improving the mounting efficiency.
In the present embodiment, the hollow area may be designed only for one high-impedance portion 300 corresponding to the insulating sleeve 530, or may be designed for a plurality of high-impedance portions 300 corresponding to the insulating sleeve 530.
Of course, the insulation assembly 500 may be designed in other forms as long as the adjustment screw 600 can be inserted into the installation groove 101 while insulation between the low impedance part 400 and the installation groove 101 is ensured.
The embodiment of the utility model also discloses a communication device, which comprises the filter 10.
The foregoing is a further detailed description of the utility model in connection with specific embodiments, and it is not intended that the utility model be limited to such description. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the utility model, and these should be considered to be within the scope of the utility model.
Claims (10)
1. The utility model provides a wave filter, includes cavity, apron and low-pass structure, the cavity has been seted up and has been used for installing the mounting groove of low-pass structure, low-pass structure is including high impedance portion and the low impedance portion of alternate connection in proper order, its characterized in that, wave filter still includes:
the insulation component is arranged between the low-pass structure and the inner wall of the mounting groove, insulates the low-pass structure from the mounting groove, and is provided with at least one opening opposite to the high-impedance part;
the adjusting screw is arranged on the cover plate or the cavity, penetrates through the opening and is arranged corresponding to the high-impedance part.
2. The filter of claim 1, wherein the insulating assembly includes a plurality of insulating stubs, the insulating stubs being disposed in one-to-one correspondence with the low impedance portions and surrounding the low impedance portions to insulate the low impedance portions from the mounting slots;
the gap between adjacent insulating stubs forms the opening.
3. The filter of claim 2, wherein the length of the insulating stub is greater than the length of the low impedance portion.
4. The filter of claim 1 wherein said insulating assembly is a unitary insulating sleeve surrounding both said high impedance portion and said low impedance portion to insulate said low impedance portion from said mounting slot;
the insulating sleeve is hollowed out in the area corresponding to the high-impedance part to form the opening.
5. The filter of claim 1, wherein said dielectric member is provided with one of said openings for each of said high impedance portions, and said filter is provided with one of said adjusting screws for each of said high impedance portions.
6. The filter of claim 5, wherein a plurality of said adjusting screws are disposed on said cover plate and are positioned on a same line; or, the adjusting screws are all arranged on the cavity and positioned on the same straight line.
7. The filter of claim 6 wherein a plurality of said adjusting screws are of the same model specification.
8. The filter of claim 1, wherein the filter is configured to filter the filter,
the insulation component is an insulation coating sprayed on the low-pass structure; or alternatively
The insulation component is a heat shrinkage tube sleeved on the low-pass structure; or alternatively
The insulating component is an insulating tube sleeved on the low-pass structure.
9. The filter of claim 1, wherein the low impedance portion is circular or square in cross-section.
10. A communication device comprising a filter according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321707176.1U CN220122079U (en) | 2023-06-29 | 2023-06-29 | Filter and communication device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321707176.1U CN220122079U (en) | 2023-06-29 | 2023-06-29 | Filter and communication device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220122079U true CN220122079U (en) | 2023-12-01 |
Family
ID=88894374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321707176.1U Active CN220122079U (en) | 2023-06-29 | 2023-06-29 | Filter and communication device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220122079U (en) |
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2023
- 2023-06-29 CN CN202321707176.1U patent/CN220122079U/en active Active
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