CN213752979U - Filter - Google Patents
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- CN213752979U CN213752979U CN202022825511.0U CN202022825511U CN213752979U CN 213752979 U CN213752979 U CN 213752979U CN 202022825511 U CN202022825511 U CN 202022825511U CN 213752979 U CN213752979 U CN 213752979U
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- coupling hole
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/2002—Dielectric waveguide filters
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Abstract
The utility model provides a filter, through setting up first negative coupling hole at the upper surface of filter body, lower surface at the filter body sets up second negative coupling hole, make first negative coupling hole, second negative coupling hole is located the hookup location of two syntonizers of filter, can realize the capacitive coupling between these two syntonizers through the combined action of first negative coupling hole, second negative coupling hole, this filter need not to set up electrically conductive partition layer, the manufacturing procedure is simple, and the cost is low, because the existence of first negative coupling hole and second negative coupling hole, can greatly reduced the degree of depth of negative coupling hole, the deformation of negative coupling hole diapire is little during the sintering, the roughness is good, through making first negative coupling hole, the setting of second negative coupling hole mutually independent, can reduce the interference between these two negative coupling holes each other, influence to the electric property of filter is little, through making first negative coupling hole, through making, The axial leads of the second negative coupling holes are coincident, and the processing and the manufacturing are convenient.
Description
Technical Field
The present application relates to the field of electronic communication devices, and more particularly, to a filter.
Background
The traditional filter has the defects of large volume, high loss, low dielectric constant and the like, and cannot perfectly meet the arrival of the 5G communication era. Therefore, the dielectric waveguide filter has the advantages that the dielectric constant of the dielectric material is higher and the volume is smaller under the same resonance frequency. Along with the continuous improvement of the performance of the base station, the performance requirement of the filter is higher and higher, the traditional dielectric waveguide filter mostly adopts an inductive coupling mode, and is difficult to meet the specific electrical performance requirements such as the inhibition of the near end of the frequency band of the filter, and in order to solve the problem, a dielectric filter adopting capacitive coupling appears in the market, for example, international patent application WO 2018148905 a1 discloses a dielectric filter which realizes the capacitive coupling between resonant cavities by arranging a through hole and a conductive partition layer on a dielectric block, but the scheme needs to additionally arrange the conductive partition layer, has complex working procedures, needs to use additional equipment and has high cost, for example, Chinese utility model patent CN104604022B discloses a dielectric filter which realizes the capacitive coupling between resonators at two sides of a blind hole by drilling the blind hole on a body made of a solid dielectric material, but the blind hole in the scheme is deeper, the aperture is less, and the processing degree of difficulty is big to, the deformation that blind hole diapire caused because of epirelief or recessed when sintering is big, seriously influences the precision of blind hole, and then influences dielectric filter's electrical property.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming prior art's shortcoming, the utility model provides an adopt first negative coupling hole, the electric capacity coupling's of two blind hole combined action realization electric capacity coupling's of second negative coupling hole wave filter is provided, this wave filter need not to set up electrically conductive partition layer, manufacturing procedure is simple, low cost, because the existence of two blind holes, the degree of depth in can greatly reduced negative coupling hole, the deformation of negative coupling hole diapire during the sintering is little, the roughness is good, first negative coupling hole, the setting that the second negative coupling hole is independent mutually, can reduce the interference between each other, it is little to the influence of the electric property of wave filter.
In order to achieve the above object, the present invention adopts a technical solution that a filter includes at least two resonators, each resonator includes a resonator body made of a ceramic material and a resonance hole located on the resonator body, the resonance hole is a blind hole, and the resonance hole is used for adjusting the frequency of the resonator; all the resonator bodies constitute a filter body, the filter further comprising:
the negative coupling hole is a blind hole and comprises a first negative coupling hole and a second negative coupling hole, the first negative coupling hole is positioned on the upper surface of the filter body, and the second negative coupling hole is positioned on the lower surface of the filter body;
a conductive layer covering a surface of the filter body, an inner wall surface of the resonance hole, and an inner wall surface of the negative coupling hole;
the first negative coupling hole and the second negative coupling hole are arranged independently, and the axial lines of the first negative coupling hole and the second negative coupling hole are overlapped;
the first negative coupling hole and the second negative coupling hole are located at the connecting position of the two resonators and are connected with the two resonators, and the first negative coupling hole and the second negative coupling hole are used for realizing capacitive coupling between the two resonators.
Preferably, the projections of the first negative coupling hole and the second negative coupling hole in the vertical direction coincide with each other.
Preferably, the orifices of the first negative coupling hole and the second negative coupling hole are provided with chamfers.
Preferably, the bottom wall of the first negative coupling hole is parallel to the bottom wall of the second negative coupling hole.
Preferably, the opening of the first negative coupling hole on the upper surface of the filter body is any one of square, circle, ellipse and polygon.
Preferably, the opening of the second negative coupling hole on the lower surface of the filter body is any one of square, circle, ellipse and polygon.
Preferably, the first negative coupling hole and the second negative coupling hole have hole depths greater than or equal to two times the thickness of the conductive layer.
Preferably, the second negative coupling hole has a hole depth greater than a hole depth of the first negative coupling hole.
Preferably, the axis of the negative coupling hole is parallel to the axis of the resonance hole.
Further preferably, the resonance holes on the two resonators are different in size.
Because of above-mentioned technical scheme's application, compared with the prior art, the utility model have the following advantage:
the utility model provides a filter, through setting up first negative coupling hole at the upper surface of filter body, lower surface at the filter body sets up second negative coupling hole, make first negative coupling hole, second negative coupling hole is located the hookup location of two syntonizers of filter, can realize the capacitive coupling between these two syntonizers through the combined action of first negative coupling hole, second negative coupling hole, this filter need not to set up electrically conductive partition layer, the manufacturing procedure is simple, and the cost is low, because the existence of first negative coupling hole and second negative coupling hole, can greatly reduced the degree of depth of negative coupling hole, the deformation of negative coupling hole diapire is little during the sintering, the roughness is good, through making first negative coupling hole, the setting of second negative coupling hole mutually independent, can reduce the interference between these two negative coupling holes each other, influence to the electric property of filter is little, through making first negative coupling hole, through making, The axial leads of the second negative coupling holes are coincident, and the processing and the manufacturing are convenient.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a perspective schematic view of a preferred embodiment of the present invention.
Fig. 2 is a schematic top view of fig. 1.
Fig. 3 is a sectional view taken along a-a in fig. 2.
Fig. 4 is a schematic perspective view of a second embodiment of the present invention.
Fig. 5 is a top view of fig. 4.
Fig. 6 is a schematic perspective view of a third embodiment of the present invention.
Fig. 7 is a top view of fig. 6.
Wherein: 10. a filter; 101. a filter body; 20. a first resonator; 201. a first resonator body; 202. a first resonance hole; 203. chamfering; 30. a second resonator; 301. a second resonator body; 302. a second resonance hole; 303. chamfering; 41. a first negative coupling aperture; 411. chamfering; 42. a second negative coupling aperture; 421. chamfering; 50. and a conductive layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be described in detail below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in fig. 1, and are only for convenience of description and simplification of description, but do not indicate or imply that the device 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 invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1-3, the present invention provides a filter 10, including two resonators, namely a first resonator 20 and a second resonator 30, wherein the first resonator 20 includes a first resonator body 201 made of a ceramic material and a first resonance hole 202 located on an upper surface of the first resonator body 201, the first resonance hole 202 is a blind hole, and the first resonance hole 202 is used for tuning a resonance frequency of the first resonator 20; the second resonator 30 includes a second resonator body 301 made of a ceramic material and a second resonance hole 302 located on an upper surface of the second resonator body 301, the second resonance hole 302 is a blind hole, and the second resonance hole 302 is used for tuning a resonance frequency of the second resonator 30; the first resonator body 201 and the second resonator body 301 jointly form the filter body 101, the filter 10 further includes a negative coupling hole and a conductive layer 50, wherein the negative coupling hole is a blind hole and includes a first negative coupling hole 41 and a second negative coupling hole 42, the first negative coupling hole 41 is located on the upper surface of the filter body 101, the second negative coupling hole 42 is located on the lower surface of the filter body 101, the conductive layer 50 covers the surface of the filter body 101, the inner wall surface of the first resonance hole 202, the inner wall surface of the second resonance hole 302, the inner wall surface of the first negative coupling hole 41 and the inner wall surface of the second negative coupling hole 42, and the conductive layer 50 is made of silver.
The first negative coupling hole 41 and the second negative coupling hole 42 are provided independently of each other, which means that they are not communicated with each other, nor communicated with the first resonance hole 202 or the second resonance hole 203, and the axial lines of the first negative coupling hole 41 and the second negative coupling hole 42 coincide with each other; the first negative coupling hole 41 and the second negative coupling hole 42 are located at the connection position of the first resonator 20 and the second resonator 30 and connect the two resonators, and the first negative coupling hole 41 and the second negative coupling hole 42 are used for realizing capacitive coupling between the two resonators.
In the present embodiment, the axial lines of the first resonance hole 202 and the second resonance hole 302 are parallel to each other and parallel to the axial lines of the first negative coupling hole 41 and the second negative coupling hole 42, but the sizes of the first resonance hole 202 and the second resonance hole 302 are different, which means that the inner diameters and/or the depths of the first resonance hole 202 and the second resonance hole 302 are different, the axial lines of the first resonance hole 202 and the second resonance hole 302 form a virtual plane, and the axial lines of the first negative coupling hole 41 and the second negative coupling hole 42 are located outside the plane.
In the present embodiment, the opening of the first negative coupling hole 41 at the upper surface of the filter body 101 is circular, and the opening of the second negative coupling hole 42 at the lower surface of the filter body 101 is also circular. In other embodiments, the opening of the first negative coupling hole 41 on the upper surface of the filter body 101 and the opening of the second negative coupling hole 42 on the lower surface of the filter body 101 may be any shape such as square, oval, polygon, etc., fig. 4 to 5 show a second embodiment in which the opening of the first negative coupling hole 41 on the upper surface of the filter body 101 and the opening of the second negative coupling hole 42 on the lower surface of the filter body 101 are polygons, and fig. 6 to 7 show a third embodiment in which the opening of the first negative coupling hole 41 on the upper surface of the filter body 101 and the opening of the second negative coupling hole 42 on the lower surface of the filter body 101 are ovals.
The bottom wall of the first negative coupling hole 41 and the bottom wall of the second negative coupling hole 42 are parallel to each other and are parallel to the upper surface and the lower surface of the filter body 101, the projections of the first negative coupling hole 41 and the second negative coupling hole 42 in the vertical direction are overlapped, and the overlapped state refers to complete overlapping.
In order to prevent the orifices of the first and second negative coupling holes 41 and 42 from being uneven or cracked during sintering, the orifices of the first and second negative coupling holes 41 and 42 are chamfered, and similarly, the orifices of the first and second resonance holes 202 and 302 are also chamfered.
The utility model provides a filter, through setting up first negative coupling hole at the upper surface of filter body, lower surface at the filter body sets up second negative coupling hole, make first negative coupling hole, second negative coupling hole is located the hookup location of two syntonizers of filter, can realize the capacitive coupling between these two syntonizers through the combined action of first negative coupling hole, second negative coupling hole, this filter need not to set up electrically conductive partition layer, the manufacturing procedure is simple, and the cost is low, because the existence of first negative coupling hole and second negative coupling hole, can greatly reduced the degree of depth of negative coupling hole, the deformation of negative coupling hole diapire is little during the sintering, the roughness is good, through making first negative coupling hole, the setting of second negative coupling hole mutually independent, can reduce the interference between these two negative coupling holes each other, influence to the electric property of filter is little, through making first negative coupling hole, through making, The axial leads of the second negative coupling holes are coincident, and the processing and the manufacturing are convenient.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing is directed to embodiments of the present application and it is noted that numerous modifications and adaptations may be made by those skilled in the art without departing from the principles of the present application and are intended to be within the scope of the present application.
Claims (10)
1. A filter comprising at least two resonators, each resonator comprising a resonator body made of a ceramic material and a resonance aperture in the resonator body, the resonance aperture being a blind aperture, the resonance aperture being for adjusting the frequency of the resonator; all the resonator bodies constitute a filter body, the filter further comprising:
the negative coupling hole is a blind hole and comprises a first negative coupling hole and a second negative coupling hole, the first negative coupling hole is positioned on the upper surface of the filter body, and the second negative coupling hole is positioned on the lower surface of the filter body;
a conductive layer covering a surface of the filter body, an inner wall surface of the resonance hole, and an inner wall surface of the negative coupling hole;
the method is characterized in that:
the first negative coupling hole and the second negative coupling hole are arranged independently, and the axial lines of the first negative coupling hole and the second negative coupling hole are overlapped;
the first negative coupling hole and the second negative coupling hole are located at the connecting position of the two resonators and are connected with the two resonators, and the first negative coupling hole and the second negative coupling hole are used for realizing capacitive coupling between the two resonators.
2. The filter of claim 1, wherein the projections of the first negative coupling hole and the second negative coupling hole in the vertical direction coincide with each other.
3. The filter of claim 1, wherein the apertures of the first negative coupling hole and the second negative coupling hole are provided with chamfers.
4. The filter of claim 1, wherein the bottom wall of the first negative coupling hole and the bottom wall of the second negative coupling hole are parallel.
5. The filter of claim 1, wherein the opening of the first negative coupling hole on the upper surface of the filter body is any one of square, circular, oval and polygonal.
6. The filter of claim 1, wherein the opening of the second negative coupling hole on the lower surface of the filter body is any one of square, circular, oval and polygonal.
7. The filter of claim 1, wherein the first negative coupling hole and the second negative coupling hole have a hole depth equal to or greater than twice the thickness of the conductive layer.
8. The filter of claim 1, wherein the second negative coupling hole has a larger hole depth than the first negative coupling hole.
9. The filter of claim 1, wherein the axis of the negative coupling hole is parallel to the axis of the resonance hole.
10. A filter according to any of claims 1-9, characterised in that the resonance holes on the two resonators are of different sizes.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911404563 | 2019-12-31 | ||
| CN2019114045636 | 2019-12-31 |
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| CN213752979U true CN213752979U (en) | 2021-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020726403.5U Active CN211629271U (en) | 2019-12-31 | 2020-05-06 | Dielectric filter and radio transceiver apparatus including the same |
| CN202010371431.4A Pending CN111403872A (en) | 2019-12-31 | 2020-05-06 | Dielectric filter and radio transceiver apparatus including the same |
| CN202022825511.0U Active CN213752979U (en) | 2019-12-31 | 2020-11-30 | Filter |
| CN202011371708.XA Pending CN112542666A (en) | 2019-12-31 | 2020-11-30 | Filter |
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| CN202020726403.5U Active CN211629271U (en) | 2019-12-31 | 2020-05-06 | Dielectric filter and radio transceiver apparatus including the same |
| CN202010371431.4A Pending CN111403872A (en) | 2019-12-31 | 2020-05-06 | Dielectric filter and radio transceiver apparatus including the same |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011371708.XA Pending CN112542666A (en) | 2019-12-31 | 2020-11-30 | Filter |
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| WO (1) | WO2021135621A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211629271U (en) * | 2019-12-31 | 2020-10-02 | 江苏灿勤科技股份有限公司 | Dielectric filter and radio transceiver apparatus including the same |
| CN112072239A (en) * | 2020-08-28 | 2020-12-11 | 潮州三环（集团）股份有限公司 | Dielectric filter and manufacturing method thereof |
| CN112072240B (en) * | 2020-08-28 | 2021-11-16 | 潮州三环（集团）股份有限公司 | Dielectric waveguide filter and manufacturing method thereof |
| CN114583430B (en) * | 2020-11-30 | 2023-06-06 | 华为技术有限公司 | Resonator, dielectric filter, and communication device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001085905A (en) * | 1999-09-17 | 2001-03-30 | Tokin Corp | Dielectric filter |
| CN110137638B (en) * | 2019-04-26 | 2021-05-11 | 摩比科技（深圳）有限公司 | Ceramic waveguide filter |
| CN110534851B (en) * | 2019-09-28 | 2024-05-28 | 江西一创新材料有限公司 | Dielectric filter and dielectric filter coupling structure for realizing symmetrical transmission zero point |
| CN210628462U (en) * | 2019-10-31 | 2020-05-26 | 摩比科技（深圳）有限公司 | Waveguide filter |
| CN111129667B (en) * | 2019-11-25 | 2021-02-12 | 江苏希奥飞尔微电子科技有限公司 | Negative coupling structure applied to dielectric waveguide filter and dielectric waveguide filter |
| CN211629271U (en) * | 2019-12-31 | 2020-10-02 | 江苏灿勤科技股份有限公司 | Dielectric filter and radio transceiver apparatus including the same |
| CN111740193A (en) * | 2020-06-23 | 2020-10-02 | 大富科技(安徽)股份有限公司 | Dielectric filter and communication base station |
| CN111834715A (en) * | 2020-06-23 | 2020-10-27 | 大富科技(安徽)股份有限公司 | Dielectric filter coupling structure, dielectric filter and communication base station |
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2020
- 2020-05-06 CN CN202020726403.5U patent/CN211629271U/en active Active
- 2020-05-06 CN CN202010371431.4A patent/CN111403872A/en active Pending
- 2020-11-03 WO PCT/CN2020/126106 patent/WO2021135621A1/en active Application Filing
- 2020-11-30 CN CN202022825511.0U patent/CN213752979U/en active Active
- 2020-11-30 CN CN202011371708.XA patent/CN112542666A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021135621A1 (en) | 2021-07-08 |
| CN211629271U (en) | 2020-10-02 |
| CN111403872A (en) | 2020-07-10 |
| CN112542666A (en) | 2021-03-23 |
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