CN111384491A - Dielectric resonator, dielectric filter and communication equipment - Google Patents
Dielectric resonator, dielectric filter and communication equipment Download PDFInfo
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- CN111384491A CN111384491A CN201910209462.7A CN201910209462A CN111384491A CN 111384491 A CN111384491 A CN 111384491A CN 201910209462 A CN201910209462 A CN 201910209462A CN 111384491 A CN111384491 A CN 111384491A
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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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P7/00—Resonators of the waveguide type
- H01P7/10—Dielectric resonators
- H01P7/105—Multimode resonators
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Abstract
The application discloses dielectric resonator, dielectric filter and communication equipment, this dielectric resonator includes: the medium body is provided with at least one blind hole, and the blind hole extends towards the inside of the medium body along the surface of the medium body; a metal layer covering the surface of the dielectric body; the cross section of the blind hole along the axis of the blind hole is in a step shape. This application has multiple regulation mode, improves and adjusts the precision.
Description
Technical Field
The application relates to the technical field of communication equipment, in particular to a dielectric resonator, a dielectric filter and communication equipment applied to a 5G communication system.
Background
At present, wireless communication technology is rapidly developed, a wireless communication system needs a high-performance dielectric filter, and the main performance of the dielectric filter is frequency selection and filtering. In the 5G communication system, since the number of the transmission and reception channels is increased from 8 of the original 4G communication system to 64 or even 128, the dielectric filter of the 5G communication system has the characteristics of miniaturization, high performance and the like.
The inventor of the application discovers in long-term research and development work that the existing dielectric resonator comprises a dielectric body, a blind hole is arranged on the dielectric body, the cross section of the blind hole along the axis is rectangular, the resonant frequency of the dielectric resonator is adjusted by adjusting the rectangular area, and the adjusting mode is single.
Disclosure of Invention
In order to solve the above problems of the dielectric filter in the prior art, the present application provides a dielectric resonator, a dielectric filter and a communication device applied to a 5G communication system.
In order to solve the above problem, an embodiment of the present application provides a dielectric resonator, including:
the medium body is provided with at least one blind hole, and the blind hole extends towards the inside of the medium body along the surface of the medium body;
a metal layer covering the surface of the dielectric body;
the cross section of the blind hole along the axis of the blind hole is in a step shape.
In order to solve the above technical problem, the present invention further provides a dielectric filter, which includes at least two of the above dielectric resonators, and a coupling structure is disposed between two adjacent dielectric resonators.
In order to solve the above technical problem, the present invention further provides a communication device, which includes an antenna and the above dielectric filter, wherein the antenna is coupled to the dielectric filter.
Compared with the prior art, the medium body of this application is provided with at least one blind hole, and the cross sectional shape of blind hole along the axis of blind hole is the ladder shape, and wherein the blind hole includes first hole section, second hole section and third hole section at least, through the cross sectional area of adjusting the cross sectional area of first hole section, second hole section and the cross sectional area of third hole section respectively to the parameter of adjustment medium resonator has multiple regulation mode, improves the regulation precision.
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 embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural view of a dielectric resonator of a first embodiment of the present application;
fig. 2 is a schematic structural view of a dielectric resonator according to a second embodiment of the present application;
FIG. 3 is a schematic view of the adjustment screw of FIG. 2;
fig. 4 is a schematic structural view of a dielectric resonator of a third embodiment of the present application;
fig. 5 is a schematic structural view of a dielectric resonator according to a fourth embodiment of the present application;
fig. 6 is a schematic structural view of a dielectric resonator according to a fifth embodiment of the present application;
fig. 7 is a schematic structural view of a dielectric resonator according to a sixth embodiment of the present application;
fig. 8 is a schematic structural view of a dielectric resonator of a seventh embodiment of the present application;
figure 9 is a schematic view of another configuration of the dielectric resonator of figure 8;
fig. 10 is a schematic structural view of a dielectric filter according to a first embodiment of the present application;
fig. 11 is a schematic structural diagram of a communication device according to the first embodiment of the present application.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be noted that the following examples are only illustrative of the present application, and do not limit the scope of the present application. Likewise, the following examples are only some examples and not all examples of the present application, and all other examples obtained by a person of ordinary skill in the art without any inventive step are within the scope of the present application.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a dielectric resonator according to a first embodiment of the present application. The dielectric resonator 10 of the present application is applied to a 5G communication system, and the dielectric resonator 10 includes a dielectric body 11 and a metal layer 12.
Wherein, the medium body 11 is provided with at least one blind hole 111, and the blind hole 111 extends along the surface of the medium body 11 to the inside of the medium body 11. Specifically, the dielectric body 11 may be provided with a blind hole 111 to change the structure of the dielectric body 11, so as to change the electromagnetic field in the dielectric body 11, and thus change the frequency of the dielectric resonator 10. The blind hole 111 may extend vertically from the surface of the dielectric body 11 to the inside of the dielectric body 11; in other embodiments, the blind holes 111 may extend from the surface of the media body 11 to the interior of the media body 11 by other means of extension, such as a zig-zag extension.
The metal layer 12 covers the surface of the dielectric body 11 and the tangential electric field of the metal layer 12 is zero, so that the metal layer 12 serves to confine the electromagnetic field within the dielectric body 11 to form standing wave oscillations. The material of the metal layer 12 can be silver, copper, aluminum, titanium or gold; for example: the material of the metal layer 12 may be silver, and the silver paste is electrosprayed on the surface of the dielectric body 11 to form the metal layer 12 on the surface of the dielectric body 11; alternatively, the material of the metal layer 12 may be a metal thin film, such as a silver thin film, which is welded on the surface of the dielectric body 11 by electric welding to form the metal layer 12 on the surface of the dielectric body 11.
The axis a of the blind hole 111 may be a center line of the blind hole 111, and a cross-sectional shape of the blind hole 111 along the axis a is a stepped shape. Specifically, the blind hole 111 may include a first hole segment 112, a second hole segment 113, and a third hole segment 114 arranged in this order along the axis a, a cross-sectional area of the first hole segment 112 perpendicular to the axis a being larger than a cross-sectional area of the second hole segment 113 perpendicular to the axis a, and a cross-sectional area of the second hole segment 113 perpendicular to the axis a being larger than a cross-sectional area of the third hole segment 114 perpendicular to the axis a. In other embodiments, the blind bore 111 may be provided with other numbers of bore segments along the axis a, for example 2 bore segments, 5 bore segments.
In this embodiment, the cross-sectional area of the first hole section 112, the cross-sectional area of the second hole section 113, and the cross-sectional area of the third hole section 114 may be adjusted, so as to adjust the parameters of the dielectric resonator 10; for example, the cross-sectional area of the first hole section 112 and the cross-sectional area of the third hole section 114 are adjusted, or the cross-sectional area of the second hole section 113 and the cross-sectional area of the third hole section 114 are adjusted, or the cross-sectional area of the first hole section 112 and the cross-sectional area of the second hole section 113 are adjusted, so that various adjustment modes are provided, and the adjustment accuracy is improved.
As shown in FIG. 1, the junction of the second bore section 113 and the third bore section 114 forms a first carrier table 115, since the cross-sectional area of the second bore section 113 perpendicular to the axis A is greater than the cross-sectional area of the third bore section 114 perpendicular to the axis A; the cross-sectional area of the first bore section 112 perpendicular to the axis a is greater than the cross-sectional area of the second bore section 113 perpendicular to the axis a, and the junction of the first bore section 112 and the second bore section 113 forms a second bearing platform 116.
When the cross-sectional area of the first hole section 112, the cross-sectional area of the second hole section 113, and the cross-sectional area of the third hole section 114 are fixed, it is necessary to adjust the parameters of the dielectric resonator 10 by the adjustment screw. The present application thus provides a dielectric resonator of the second embodiment, which is described on the basis of the dielectric resonator 10 of the first embodiment.
As shown in fig. 2, the dielectric resonator 10 further includes a first nut 131 and a first adjusting screw 132, the first nut 131 may be disposed on the first stage 115, and the first adjusting screw 132 is disposed in the second and third hole sections 113 and 114 of the blind hole 111 through the first nut 131.
Wherein, the cross-sectional area of the first nut 131 perpendicular to the axis a may be equal to or less than the cross-sectional area of the second hole section 113, and the first nut 131 may be fixed on the first bearing platform 115 by means of electric welding. The shape of the cross-section of the first nut 131 may be the same as the shape of the cross-section of the second bore section 113, for example, the shape of the cross-section of the first nut 131 is hexagonal or circular. In other embodiments, the shape of the cross-section of the first nut 131 is different from the shape of the cross-section of the second bore section 113, for example, the cross-section of the second bore section 113 is circular and the cross-section of the first nut 131 is hexagonal.
The present embodiment can adjust the resonant frequency of the dielectric resonator 10 by adjusting the length of the first adjusting screw 132 in the third hole section 114 to change the electromagnetic field in the dielectric body 11. The longer the length of the first adjustment screw 132 located within the third bore section 114, the lower the resonant frequency of the dielectric resonator 10; the shorter the length of the first adjustment screw 132 located within the third bore segment 114, the higher the resonant frequency of the dielectric resonator 10.
In order to avoid electromagnetic fields from leaking out of the first and second hole segments 112, 113, the metal layer 12 further covers the first and second hole segments 112, 113. Since the resonant frequency of the dielectric resonator 10 is adjusted by adjusting the length of the first adjustment screw 132 located in the third hole section 114, the third hole section 114 does not need to be covered with the metal layer 12.
As shown in fig. 3, the material of the surface of the first adjusting screw 132 may be a metal material, specifically, a metal material such as silver, copper, aluminum, titanium, or gold, so as to prevent the electromagnetic field in the dielectric resonator 10 from leaking through the first adjusting screw 132, and improve the performance of the dielectric resonator 10. Further, the material of other regions of the first adjustment screw 132 may be a non-metallic material, such as plastic, etc. Compared with the prior art that all the adjusting screws are made of metal materials, the surface of the first adjusting screw 132 is made of metal materials, and other areas are made of non-metal materials, so that the cost can be reduced.
The application provides a dielectric resonator of the third embodiment, as shown in fig. 4, the dielectric resonator 10 further includes a second nut 133 and a second adjusting screw 134, the second nut 133 may be disposed on the second bearing platform 116, and the second adjusting screw 134 is disposed in the first hole section 112 and the second hole section 113 of the blind hole 111 through the second nut 133. The second nut 133 is the same as the first nut 131, and the second adjusting screw 134 is the same as the first adjusting screw 132, which are not described herein again.
The present embodiment can adjust the resonant frequency of the dielectric resonator 10 by adjusting the length of the second adjusting screw 134 in the second hole section 113 to change the electromagnetic field in the dielectric body 11. The longer the length of the second adjusting screw 134 located in the second hole section 113, the lower the resonance frequency of the dielectric resonator 10; the shorter the length of the second adjustment screw 134 located in the second hole section 113, the higher the resonance frequency of the dielectric resonator 10.
In order to avoid leakage of the electromagnetic field from the first hole section 112, the metal layer 12 further covers the first hole section 112. Since the resonance frequency of the dielectric resonator 10 is adjusted by adjusting the length of the second adjustment screw 134 located in the second hole section 113, the second hole section 113 and the third hole section 114 need not be covered with the metal layer 12.
The present application provides a dielectric resonator of a fourth embodiment, and as shown in fig. 5, the dielectric resonator of the present embodiment includes a first nut 131, a first adjusting screw 132, a second nut 133, and a second adjusting screw 134 of the above-described embodiments. When the dielectric resonator is assembled, first, a first nut 131 and a first adjusting screw 132 are arranged on the first bearing table 115, and the first adjusting screw 132 is adjusted; then, a second nut 133 and a second adjusting screw 134 are provided on the second bearing table 116, and the second adjusting screw 134 is adjusted. Compared with the dielectric resonator disclosed in the second embodiment and the third embodiment, the dielectric resonator can adjust the parameters of the dielectric resonator through the first adjusting screw 132 and the second adjusting screw 134, respectively, so as to improve the adjustment accuracy of the dielectric resonator.
The present application provides a dielectric resonator of a fifth embodiment, as shown in fig. 6, whose first adjustment screw 132 includes a first rod section 135 and a second rod section 136 disposed along an axis a, and a cross-sectional area of the first rod section 135 perpendicular to the axis a is smaller than a cross-sectional area of the second rod section 136 perpendicular to the axis a. Compared with the adjusting screw 13 with the same diameter, the second rod section 136 of the adjusting screw 13 close to the bottom wall of the blind hole 111 is designed to be thicker than other parts, so that the gap between the second rod section 136 and the third hole section 114 is reduced, and the leakage of an electromagnetic field can be reduced.
Wherein the cross-sectional area of the second rod segment 136 perpendicular to the axis a may be equal to the cross-sectional area of the third hole segment 114 perpendicular to the axis a, the gap between the second rod segment 136 and the third hole segment 114 can be further reduced, and leakage of the electromagnetic field can be avoided.
In addition, the second rod segment 136 may adopt a smooth design, so that the second rod segment 136 is tightly matched with the third hole segment 114, the abrasion of the thread of the first adjusting screw 132 on the inner wall of the blind hole 111 can be avoided, and the performance index of the dielectric filter is improved. The second adjusting screw 134 may have the same structure as the first adjusting screw 132, and will not be described herein.
The present application provides a dielectric resonator of a sixth embodiment, as shown in fig. 7, the first hole section 112 is provided with a first thread 1121, the second hole section 113 is provided with a second thread 1131, the third hole section 114 is provided with a third thread 1141, the dielectric resonator further includes a first adjusting screw 731, a second adjusting screw 732, and a third adjusting screw 733, the third adjusting screw 733 is provided in the third hole section 114 through the third thread 1141, the second adjusting screw 732 is provided in the second hole section 113 through the second thread 1131, and the first adjusting screw 731 is provided in the first hole section 112 through the first thread 1121.
In the assembly process of the dielectric resonator, first, the third adjusting screw 733 is disposed in the third hole section 114 through the third thread 1141, and the position of the third adjusting screw 733 is adjusted; then, the second adjusting screw 732 is arranged in the second hole section 113 through the second thread 1131, and the position of the second adjusting screw 732 is adjusted; finally, the first adjustment screw 731 is disposed in the first hole section 112 through the first thread 1121, and the position of the first adjustment screw 731 is adjusted.
Compared with the dielectric resonator of the embodiment, the dielectric resonator of the embodiment does not need to be additionally provided with a nut, and the cost of the dielectric resonator can be reduced.
The present application provides the dielectric resonator of the seventh embodiment, as shown in fig. 8, the at least one blind via 111 includes a first blind via 117 and a second blind via 118, wherein a size of the first blind via 117 is not equal to a size of the second blind via 118. The first blind via 117 and the second blind via 118 can be the blind via 111 disclosed in the above embodiments, and are not described herein again.
Wherein the first blind hole 117 and the second blind hole 118 may be provided on the same surface of the dielectric body 11. The resonant frequency of the dielectric resonator is adjusted by providing the cross-sectional area of the first blind hole 116 perpendicular to the axis a and the cross-sectional area of the second blind hole 117 perpendicular to the axis a.
In other embodiments, as shown in FIG. 9, a first blind hole 117 is provided in a first surface of the media body 11 and a second blind hole 118 is provided in a second surface of the media body 11, wherein the first surface of the media body 11 is disposed opposite the second surface of the media body 11.
The present application further provides a dielectric filter of the first embodiment, as shown in fig. 10, a dielectric filter 80 is applied to a 5G communication system, the dielectric filter 80 includes at least two dielectric resonators 81, wherein dielectric bodies of the at least two dielectric resonators 81 are integrally formed, so as to improve the manufacturing efficiency of the dielectric filter 80. The dielectric resonator 81 may be the dielectric resonator disclosed in the above embodiments, and will not be described herein.
A coupling structure 82 is provided between the two adjacent dielectric resonators 81, and the coupling structure 82 is used to connect the two adjacent dielectric resonators 81. A third blind hole 821 is disposed between two adjacent dielectric resonators 81, and the structure of the third blind hole 821 is the same as that of the blind hole 111, which is not described herein again.
The third blind via 821 may be used to tune a coupling parameter of the coupling structure 82, for example, the coupling parameter may be a coupling bandwidth. The dielectric filter 80 further includes an adjusting screw 84, and the adjusting screw 84 may include the first adjusting screw, the second adjusting screw and/or the third adjusting screw of the above embodiments, which will not be described herein again.
The present application further provides a communication device of the first embodiment, as shown in fig. 11, the communication device 100 is applied to a 5G communication system, the communication device 100 includes an antenna 101 and a dielectric filter 102, the antenna 101 is coupled to the dielectric filter 102, and the dielectric filter 102 is the dielectric filter disclosed in the foregoing embodiments and is not described herein again. The communication device 100 may be a base station or a terminal for a 5G communication system, and the terminal may specifically be a mobile phone, a tablet computer, a wearable device with a 5G communication function, and the like.
It should be noted that the above embodiments belong to the same inventive concept, and the description of each embodiment has a different emphasis, and reference may be made to the description in other embodiments where the description in individual embodiments is not detailed.
The protection circuit and the control system provided by the embodiment of the present application are described in detail above, and a specific example is applied in the description to explain the principle and the embodiment of the present application, and the description of the above embodiment is only used to help understand the method and the core idea of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. A dielectric resonator, characterized in that the dielectric resonator comprises:
the medium body is provided with at least one blind hole, and the blind hole extends towards the inside of the medium body along the surface of the medium body;
a metal layer covering the surface of the dielectric body;
the cross section of the blind hole along the axis of the blind hole is in a step shape.
2. The dielectric resonator of claim 1, wherein the blind hole comprises at least a first hole section, a second hole section, and a third hole section arranged in that order along the axis, the first hole section having a larger cross-sectional area perpendicular to the axis than the second hole section, and the second hole section having a larger cross-sectional area perpendicular to the axis than the third hole section.
3. A dielectric resonator according to claim 2, wherein the junction of the second and third hole sections forms a first stage and the junction of the first and second hole sections forms a second stage.
4. The dielectric resonator of claim 3, further comprising a first nut disposed on the first stage and a first adjusting screw disposed within the blind hole via the first nut; the metal layer covers the first hole section and the second hole section.
5. The dielectric resonator of claim 4, wherein the first adjustment screw comprises a first rod segment and a second rod segment disposed along the axis, the first rod segment having a smaller cross-sectional area perpendicular to the axis than the second rod segment; the second rod segment has a cross-sectional area perpendicular to the axis equal to a cross-sectional area of the third bore segment perpendicular to the axis.
6. The dielectric resonator of claim 3, further comprising a second nut disposed on the second stage and a second adjustment screw disposed within the blind hole via the second nut; the metal layer covers the first hole section.
7. A dielectric resonator according to claim 2, characterized in that the first hole section is provided with a first thread, the second hole section is provided with a second thread and the third hole section is provided with a third thread.
8. The dielectric resonator of claim 7, further comprising a first adjustment screw, a second adjustment screw, and a third adjustment screw, the third adjustment screw disposed within the third bore section by the third thread, the second adjustment screw disposed within the second bore section by the second thread, the first adjustment screw disposed within the first bore section by the first thread;
the at least one blind hole comprises a first blind hole and a second blind hole, and the size of the first blind hole is not equal to that of the second blind hole.
9. A dielectric filter comprising at least two dielectric resonators as claimed in any one of claims 1 to 8, a coupling structure being provided between adjacent two of said dielectric resonators.
10. A communication device, characterized in that the communication device comprises an antenna and a dielectric filter according to claim 9, the antenna being coupled to the dielectric filter.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2018125873 | 2018-12-29 | ||
| CNPCT/CN2018/125873 | 2018-12-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111384491A true CN111384491A (en) | 2020-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910209462.7A Withdrawn CN111384491A (en) | 2018-12-29 | 2019-03-19 | Dielectric resonator, dielectric filter and communication equipment |
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| Country | Link |
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| CN (1) | CN111384491A (en) |
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| CN114976537A (en) * | 2021-02-27 | 2022-08-30 | 上海华为技术有限公司 | Dielectric resonator, dielectric filter and communication equipment |
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Application publication date: 20200707 |