CN111146534A - Dielectric filter and communication device - Google Patents
Dielectric filter and communication device Download PDFInfo
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- CN111146534A CN111146534A CN202010042514.9A CN202010042514A CN111146534A CN 111146534 A CN111146534 A CN 111146534A CN 202010042514 A CN202010042514 A CN 202010042514A CN 111146534 A CN111146534 A CN 111146534A
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- dielectric
- dielectric filter
- electrodes
- tuning hole
- resonator
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- 238000004891 communication Methods 0.000 title claims abstract description 12
- 230000005540 biological transmission Effects 0.000 claims abstract description 24
- 239000003989 dielectric material Substances 0.000 claims abstract description 11
- 239000007787 solid Substances 0.000 claims abstract description 11
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical group [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 18
- 229910052709 silver Inorganic materials 0.000 claims description 18
- 239000004332 silver Substances 0.000 claims description 18
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 13
- 229910052802 copper Inorganic materials 0.000 claims description 13
- 239000010949 copper Substances 0.000 claims description 13
- 229910010293 ceramic material Inorganic materials 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 description 11
- 230000008878 coupling Effects 0.000 description 7
- 238000010168 coupling process Methods 0.000 description 7
- 238000005859 coupling reaction Methods 0.000 description 7
- 238000006880 cross-coupling reaction Methods 0.000 description 5
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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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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- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention provides a dielectric filter and a communication device, which comprise at least three connected dielectric resonators, wherein each dielectric resonator comprises a body made of solid dielectric materials and a tuning hole positioned on the surface of the body, the bodies of all the dielectric resonators form the body of the dielectric filter, the surface of the body of the dielectric filter and the surface of the tuning hole are covered with a conductive layer, two electrodes are respectively arranged on the surfaces of the two dielectric resonators positioned on one sides of an input port and an output port, a transmission line is arranged on a carrier, and when the carrier is fixed on the dielectric resonators, the transmission line is suitable for connecting the two electrodes and transmitting electric signals. The two electrodes are arranged on the surface of the resonator, the transmission line for connecting the electrodes is arranged on the external carrier, and the two electrodes are connected through the connection between the external carrier and the resonator body.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a dielectric filter and a communication device.
Background
5G communication is the leading communication technology at present, and various communication companies compete to develop research on relevant aspects. The Sub 6GHz adopts MIMO technology, so a large number of filters are required to be integrated inside the antenna, and thus higher requirements are imposed on the size and weight of the filters. The traditional metal filter cannot be integrated with an antenna due to too large volume and weight.
The miniaturized dielectric filter realized by adopting the high dielectric constant material is an effective solution for realizing a Sub 6GHz MIMO communication system at present because the size and the weight of the miniaturized dielectric filter are lower than 1/100 of the traditional filter. The dielectric filter adopts a body made of solid dielectric materials (such as ceramic materials with high dielectric constant), and the surface of the body is metalized (such as silver plating) to form a dielectric resonator; the dielectric filter is formed by a plurality of dielectric resonators connected in series and coupling between the respective resonators (including direct coupling between adjacent dielectric resonators and cross coupling between non-adjacent dielectric resonators). The coupling between the resonators can be divided into positive coupling (also referred to as inductive coupling) and negative coupling (also referred to as capacitive coupling) according to polarity. The dielectric filter is easier to realize cross coupling with positive polarity, but is more difficult to realize cross coupling with negative polarity.
In order to realize the negative cross coupling of the dielectric filter, a flying rod with a metalized surface is adopted to connect two dielectric resonators in the prior art, and the conventional flying rod is mainly made of a metal material and is matched with a flying rod seat to be arranged in a cavity for use. This kind of installation through machining, not only the process is loaded down with trivial details, can not adjust after the installation, and the debugging is inconvenient, and it need take apart metal cover plate, takes out the fly rod and adopts the machining mode to change the length or the shape of fly rod, and the cavity test is packed into again, and then accomplishes one-time debugging. However, the continuous and repeated machining and performance testing operations seriously affect the performance of the filter, and the debugging is complex and the production efficiency is low.
Disclosure of Invention
Therefore, the invention aims to solve the technical problems that the dielectric filter in the prior art is complex to process by adopting the dielectric flying rod, cannot be adjusted after being installed, is complex to debug and has low production efficiency.
To this end, the present invention provides a dielectric filter, comprising:
at least three connected dielectric resonators, each dielectric resonator comprising a body of solid dielectric material and a tuning hole in the surface of the body; the bodies of all the dielectric resonators form the body of the dielectric filter; the surface of the body of the dielectric filter and the surface of the tuning hole are covered with a conductive layer; the method is characterized in that:
the two electrodes are respectively arranged on the surfaces of the two dielectric resonators on one side of the input and output port;
a transmission line disposed on the carrier; the transmission line is adapted to connect the two electrodes when the carrier is fixed to the dielectric resonator.
Any one of the electrodes is formed on the surface of the dielectric resonator by the conductive layer.
The electrodes are round, square or triangular.
The depth of the tuning hole, the area of the conducting layer covered in the tuning hole and the position of the conducting layer in the tuning hole are all related to the resonant frequency of the dielectric resonator in which the tuning hole is located.
The thickness of the conductive layer is greater than or equal to the skin depth.
The conducting layer is a silver layer.
The carrier is a PCB.
The transmission line is a copper layer, a silver-plated wire or a silver-plated transmission rod of the PCB.
The solid dielectric material is a ceramic material.
All dielectric resonator bodies are integrally formed by the same solid dielectric material.
The invention provides a communication device comprising at least one dielectric filter as described above.
The technical scheme of the invention has the following advantages:
1. the invention provides a dielectric filter, at least three connected dielectric resonators, each dielectric resonator comprises a body made of solid dielectric material and a tuning hole positioned on the surface of the body, the bodies of all the dielectric resonators form the body of the dielectric filter, the surface of the body of the dielectric filter and the surface of the tuning hole are covered with conducting layers, two electrodes are respectively arranged on the surfaces of the two dielectric resonators positioned on one side of an input/output port, a transmission line is arranged on a carrier, and when the carrier is fixed on the dielectric resonators, the transmission line is suitable for connecting the two electrodes and transmitting electric signals. The two electrodes are arranged on the surface of the resonator, the transmission line for connecting the electrodes is arranged on the external carrier, and the two electrodes are connected through the connection between the external carrier and the resonator body.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of a dielectric filter according to the present invention;
FIG. 2 is a schematic diagram of a tuning hole structure in a dielectric filter according to the present invention;
fig. 3 is a frequency response curve of a dielectric filter according to the present invention.
Description of reference numerals:
1-a ceramic body; 11-a silver layer; 2-an electrode; 3-input-output port; 4-a tuning hole; 5-a transmission line; 6-PCB; 61-a ground copper layer; 62-PCB via holes; 63-abdicating holes; 7-green oil.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within 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 orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" 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 should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
The embodiment provides a dielectric filter, which comprises at least three connected dielectric resonators, wherein each dielectric resonator comprises a body made of solid dielectric material and a tuning hole 4 positioned on the surface of the body, and the bodies of all the dielectric resonators form the body of the dielectric filter. As shown in fig. 1, in this embodiment, four dielectric resonators are provided, each dielectric resonator has one tuning hole 4, the four dielectric resonators are arranged in a matrix, and five, six, and so on dielectric resonators may be provided. In this embodiment, the solid dielectric material is a ceramic material, and the body of the dielectric resonator is the ceramic body 1, but other materials may be adopted, depending on the specific requirements. In this embodiment, all the dielectric resonator bodies are integrally formed by using the same ceramic body 1, as shown in fig. 2, that is, four tuning holes 4 are distributed on the same ceramic body 1 in a shape like a Chinese character 'tian'.
The surface of the ceramic body 1 is covered with a conductive layer, the conductive layer can be a copper layer, a tin layer, a silver layer 11 or an aluminum layer and other metal layers, and the thickness of the conductive layer is larger than or equal to the skin depth. In this embodiment, the conductive layer is a silver layer 11, and covers the surface of the ceramic body 1, thereby realizing a complete and closed electromagnetic field transmission structure. The tuning hole 4 is covered by a silver layer 11, and the depth of the tuning hole 4, the area of the silver layer 11 covered in the tuning hole 4 and the position of the silver layer 11 in the tuning hole 4 are all related to the resonance frequency of the dielectric resonator in which the tuning hole 4 is located, for example, the silver layer 11 is distributed on the bottom of the tuning hole 4 in a ring shape, or distributed on the inner wall of the tuning hole 4 in a strip shape, and so on.
On the surface of one side of the ceramic body 1 opposite to the tuning hole 4, the silver layer 11 in a closed ring shape is partially removed by means of material removal, the silver layer 11 remained in the middle forms the electrode 2, the silver layer 11 is also removed in one circle at the periphery of the two input and output ports 3, and the removed part is coated with green oil 7. As shown in fig. 1, in this embodiment, the electrode 2 having a size of an inner circle of a circular ring is obtained by removing the circular ring-shaped silver layer 11, and of course, the electrode 2 obtained by removing the silver layer 11 may also have a square shape or a triangular shape, depending on the specific requirements.
The transmission line 5 can be objects capable of transmitting electric signals, such as a copper layer of a PCB, a silver-plated wire or a silver-plated transmission rod, and the transmission line 5 is arranged on a carrier, in the embodiment, the transmission line 5 adopts the copper layer of the PCB, the carrier is PCB6, the copper layer is positioned on PCB6, as shown in FIG. 1, the surface of the PCB6 is covered with the copper layer, a dumbbell-shaped copper layer transmission line is formed by removing the copper layer, a removed part is coated with green oil 7, a plurality of PCB through holes 62 are formed in the periphery of the removed part to play a role in shielding and grounding, the copper layer of the rest part forms a grounding copper layer 61, and a abdicating hole 63 corresponding to an input/. The PCB6 is soldered on the surface of the ceramic body 1 by soldering tin, and a gap of 0.2mm-0.4mm is left between the PCB6 and the ceramic body 1. The two ends of the transmission line 5 and the silver layers 11 of the two electrodes 2 are welded together by welding tin, thereby realizing the transmission of the electric field. Of course, the carrier may also be air (i.e. directly connecting the two electrodes on the ceramic body by means of a copper layer or silver-plated wire, etc.) or ceramic, etc., as desired. Fig. 3 is a frequency response curve of the dielectric filter in the present embodiment.
The two electrodes 2 are arranged on the surface of the resonator, the transmission line 5 for connecting the electrodes 2 is arranged on the external carrier, and the two electrodes 2 are connected through the connection of the external carrier and the resonator body, so that the structure is simple, the adjustment is easy, and the negative cross coupling is convenient to realize.
Example 2
The present embodiment provides a communication device including at least one dielectric filter of embodiment 1.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (11)
1. A dielectric filter comprising at least three connected dielectric resonators, each dielectric resonator comprising a body of solid dielectric material and a tuning hole (4) in a surface of the body; the bodies of all the dielectric resonators form the body of the dielectric filter; the surface of the body of the dielectric filter and the surface of the tuning hole (4) are covered with a conductive layer; the method is characterized in that:
the two electrodes (2) are respectively arranged on the surfaces of the two dielectric resonators on one side of the input and output port (3);
a transmission line (5) arranged on the carrier; the transmission line is adapted to connect two of the electrodes (2) when the carrier is fixed to the dielectric resonator.
2. A dielectric filter according to claim 1, characterized in that any of the electrodes (2) is formed by the conductive layer on the surface of the dielectric resonator.
3. A dielectric filter according to claim 2, characterized in that the electrodes (2) are circular, square or triangular.
4. A dielectric filter according to claim 1, characterized in that the depth of the tuning hole (4) and the area of the conductive layer covered in the tuning hole (4) and the position of the conductive layer in the tuning hole (4) are related to the resonance frequency of the dielectric resonator in which the tuning hole (4) is located.
5. The dielectric filter of claim 1, wherein the thickness of the conductive layer is greater than or equal to a skin depth.
6. A dielectric filter as claimed in claim 5, characterized in that the electrically conductive layer is a silver layer (11).
7. A dielectric filter according to claim 1, characterized in that the carrier is a PCB (6).
8. A dielectric filter according to claim 7, characterized in that the transmission line (5) is a copper layer of a PCB, a silver plated wire or a silver plated transmission rod.
9. A dielectric filter as claimed in claim 1, wherein the solid dielectric material is a ceramic material.
10. A dielectric filter as claimed in claim 9, wherein all of the dielectric resonator bodies are integrally formed of the same solid dielectric material.
11. A communication device comprising at least one dielectric filter according to any one of claims 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010042514.9A CN111146534A (en) | 2020-01-15 | 2020-01-15 | Dielectric filter and communication device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010042514.9A CN111146534A (en) | 2020-01-15 | 2020-01-15 | Dielectric filter and communication device |
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| Publication Number | Publication Date |
|---|---|
| CN111146534A true CN111146534A (en) | 2020-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010042514.9A Pending CN111146534A (en) | 2020-01-15 | 2020-01-15 | Dielectric filter and communication device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111864319A (en) * | 2020-08-04 | 2020-10-30 | 南通大学 | Dielectric waveguide filter |
| CN114792876A (en) * | 2021-01-25 | 2022-07-26 | 南京以太通信技术有限公司 | Method for manufacturing dielectric filter and method for manufacturing electrode thereof |
| WO2022267951A1 (en) * | 2021-06-25 | 2022-12-29 | 华为技术有限公司 | Four-cornered element structure, dielectric filter, and base station device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160380322A1 (en) * | 2011-12-03 | 2016-12-29 | Alexandre Rogozine | Dielectric Waveguide Filter with Cross-Coupling RF Signal Transmission Structure |
| CN209766609U (en) * | 2019-04-09 | 2019-12-10 | 摩比科技（深圳）有限公司 | Symmetrical zero structure of dielectric waveguide filter and filter thereof |
| CN211295334U (en) * | 2020-01-15 | 2020-08-18 | 深圳市大富科技股份有限公司 | Dielectric filter and communication device |
-
2020
- 2020-01-15 CN CN202010042514.9A patent/CN111146534A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160380322A1 (en) * | 2011-12-03 | 2016-12-29 | Alexandre Rogozine | Dielectric Waveguide Filter with Cross-Coupling RF Signal Transmission Structure |
| CN209766609U (en) * | 2019-04-09 | 2019-12-10 | 摩比科技（深圳）有限公司 | Symmetrical zero structure of dielectric waveguide filter and filter thereof |
| CN211295334U (en) * | 2020-01-15 | 2020-08-18 | 深圳市大富科技股份有限公司 | Dielectric filter and communication device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111864319A (en) * | 2020-08-04 | 2020-10-30 | 南通大学 | Dielectric waveguide filter |
| CN111864319B (en) * | 2020-08-04 | 2021-08-27 | 南通大学 | Dielectric waveguide filter |
| CN114792876A (en) * | 2021-01-25 | 2022-07-26 | 南京以太通信技术有限公司 | Method for manufacturing dielectric filter and method for manufacturing electrode thereof |
| CN114792876B (en) * | 2021-01-25 | 2024-04-02 | 南京以太通信技术有限公司 | Method for manufacturing dielectric filter and method for manufacturing electrode thereof |
| WO2022267951A1 (en) * | 2021-06-25 | 2022-12-29 | 华为技术有限公司 | Four-cornered element structure, dielectric filter, and base station device |
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