CN111384564A - Dielectric resonator, dielectric filter and communication equipment - Google Patents
Dielectric resonator, dielectric filter and communication equipment Download PDFInfo
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- CN111384564A CN111384564A CN201910208696.XA CN201910208696A CN111384564A CN 111384564 A CN111384564 A CN 111384564A CN 201910208696 A CN201910208696 A CN 201910208696A CN 111384564 A CN111384564 A CN 111384564A
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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
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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 application discloses dielectric resonator, dielectric filter and communication equipment, this dielectric resonator includes: the medium body is provided with at least one blind hole; the metal layer covers the surface of the medium body; the first nut is arranged in the blind hole; and the first adjusting screw rod is arranged in the blind hole through a first nut. The thickness of dielectric resonator can be reduced, and then the volume of dielectric resonator is reduced.
Description
Technical Field
The application relates to the technical field of communication, 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 this application discovers in long-term research and development work, current dielectric filter includes the dielectric body, the apron, screw and nut, the dielectric body is provided with the blind hole, the apron is installed on the surface that the dielectric body set up the blind hole, the apron is provided with the through-hole that corresponds with the blind hole, the nut sets up in the through-hole, the screw stretches into the blind hole through the through-hole, because this dielectric filter need set up the screw and the nut of apron and protrusion apron on the dielectric body, consequently, lead to dielectric filter's thickness increase.
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;
a metal layer covering the surface of the dielectric body;
the first nut is arranged in the blind hole;
and the first adjusting screw rod is arranged in the blind hole through the first nut.
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 dielectric resonator at least comprises a dielectric body, a metal layer, a first nut and a first adjusting screw rod, wherein the first nut is arranged in the blind hole, the first adjusting screw rod is arranged in the blind hole through the first nut, the first nut and the first adjusting screw rod are prevented from protruding out of the dielectric body, the thickness of the dielectric resonator is reduced, and the size of the dielectric resonator is further reduced.
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 view of the first nut of FIG. 1 disposed within the first bore section;
FIG. 3 is a schematic view of the first nut of FIG. 1 mounted on a first carrier table;
fig. 4 is a schematic structural view of a dielectric resonator of a second embodiment of the present application;
FIG. 5 is a schematic view of the first adjustment screw of FIG. 4;
fig. 6 is a schematic structural view of a dielectric resonator according to a third embodiment of the present application;
fig. 7 is a schematic structural view of a dielectric resonator according to a fourth embodiment of the present application;
fig. 8 is a schematic structural view of a dielectric resonator of a fifth embodiment of the present application;
FIG. 9 is a schematic diagram of the structure of an alternative embodiment of the dielectric resonator of FIG. 8;
FIG. 10 is a schematic structural diagram 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 above-described drawings (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, a metal layer 12, a first nut 131, and a first adjusting screw 141.
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 first nut 131 is disposed in the blind hole 111, as shown in fig. 1, that is, the first nut 131 may be fixed on a sidewall of the blind hole 111 by welding or gluing. The first adjusting screw 141 is disposed in the blind hole 111 through the first nut 131, that is, the first adjusting screw 141 rotates relative to the first nut 131 to adjust the length of the first adjusting screw 141 in the blind hole 111.
As shown in fig. 2, the axis a of the blind hole 111 may be a centerline of the blind hole 111. The blind hole 111 comprises at least a first hole section 112 and a second hole section 113 arranged along the axis a, the cross-sectional area of the first hole section 112 perpendicular to the axis a is larger than the cross-sectional area of the second hole section 113 perpendicular to the axis a, i.e. the cross-sectional shape of the blind hole 111 along the axis a may be a step shape. In other embodiments, the blind bore 111 may be provided with other numbers of bore segments along the axis a, for example 3 bore segments, 5 bore segments. Since the cross-sectional area of the first bore section 112 perpendicular to the axis a is larger than the cross-sectional area of the second bore section 113 perpendicular to the axis a, the junction of the first bore section 112 and the second bore section 113 forms a first load bearing platform 115.
The first nut 131 is disposed in the first hole section 112, and the first nut 131 may be disposed above the first carrier block 115, i.e., the first nut 131 may be fixed on the sidewall of the first hole section 112 by electric welding or adhesive. The first adjusting screw 141 is disposed in the blind hole 111 through the first nut 131, that is, the first adjusting screw 141 rotates relative to the first nut 131 to adjust the length of the first adjusting screw 141 in the second hole section 113.
In other embodiments, as shown in fig. 3, the first nut 131 may be disposed on the first carrier plate 115, and the first nut 131 may be fixed on the first carrier plate 115 by welding or gluing.
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 first bore section 112, and the shape of the cross-section of the first nut 131 may be the same as the shape of the cross-section of the first bore section 112, 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 first bore section 112, for example, the shape of the cross-section of the first bore section 112 is circular and the shape of the cross-section of the first nut 131 is hexagonal.
The present embodiment may adjust the cross-sectional area of the first hole section 112 and the cross-sectional area of the second hole section 113, respectively, to achieve adjustment of the parameters of the dielectric resonator 10. When the cross-sectional area of the first hole section 112 and the cross-sectional area of the second hole section 113 are fixed values, it is necessary to adjust parameters of the dielectric resonator 10 by the first adjustment screw 141. Wherein, the longer the length of the first adjusting screw rod 141 in the second hole section 113, the lower the resonance frequency of the dielectric resonator 10; the shorter the length of the first adjustment screw 141 within 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 it is necessary to adjust the length of the first adjustment screw 141 within the second bore section 113, the second bore section 113 does not need to be covered with the metal layer 12.
The dielectric resonator 10 of this embodiment at least includes the dielectric body 11, the metal layer 12, the first nut 131 and the first adjusting screw 141, the dielectric body 11 is provided with a blind hole 111, the blind hole 111 at least includes the first hole section 112 and the second hole section 113 that set up along axis a, the first nut 131 is disposed in the first hole section 112, the first adjusting screw 141 is disposed in the blind hole 111 through the first nut 131, avoid the first nut 131 and the first adjusting screw 141 to protrude in the dielectric body 11, reduce the thickness of the dielectric resonator 10, and then reduce the volume of the dielectric resonator 10.
The present application 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. 4, the first adjustment screw 241 of the dielectric resonator includes a first rod segment 242 and a second rod segment 243 disposed along the axis a, and the cross-sectional area of the first rod segment 242 perpendicular to the axis a is smaller than the cross-sectional area of the second rod segment 243 perpendicular to the axis a. Compared with an adjusting screw with a constant diameter, the cross-sectional area of the second rod section 243 is set to be larger than that of the first rod section 242, so that the gap between the second rod section 243 and the second hole section 113 is reduced, and the leakage of an electromagnetic field can be reduced.
As shown in fig. 5, the material of the surface of the first adjusting screw 241 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 241, thereby improving the performance of the dielectric resonator. Further, the material of other regions of the first adjusting screw 241 may be a non-metal 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 241 of the present application is made of metal materials, and other areas are made of non-metal materials, so that the cost is reduced.
Wherein, the cross-sectional area of the second rod section 243 perpendicular to the axis a may be equal to the cross-sectional area of the second hole section 113 perpendicular to the axis a, the gap between the second rod section 243 and the second hole section 113 can be further reduced, and the leakage of the electromagnetic field of the dielectric resonator can be avoided.
The first rod section 242 is provided with threads, and the second rod section 243 can adopt a smooth design, that is, the outer surface of the second rod section 243 is smooth, so that the second rod section 243 is tightly matched with the second hole section 113, the threads of the first adjusting screw rod 241 can be prevented from wearing the inner wall of the blind hole 111, and the performance index of the dielectric filter is improved.
Furthermore, the first rod segment 242 may be partially threaded, that is, the end of the first rod segment 242 close to the first nut 131 is threaded, and the end of the first rod segment 242 close to the second rod segment 243 is designed to be smooth, so as to ensure that the threads of the first rod segment 242 do not extend into the second hole segment 113.
The present application provides the dielectric resonator of the third embodiment, as shown in fig. 6, the blind hole 111 of the dielectric resonator further comprises a third hole segment 114, and the cross-sectional area of the second hole segment 113 perpendicular to the axis a is larger than the cross-sectional area of the third hole segment 114 perpendicular to the axis a, so that the junction of the second hole segment 113 and the third hole segment 114 forms a second loading stage 116.
The dielectric resonator further includes a second nut 132 and a second adjusting screw 142, the second nut 132 is disposed on the second bearing platform 116, and the second adjusting screw 142 is disposed in the blind hole 111 through the second nut 132, wherein the second nut 132 is the same as the first nut 131, and the second adjusting screw 142 is the same as the first adjusting screw 141, which is not described herein again.
In the assembly process of the dielectric resonator, firstly, the second nut 132 is arranged on the second bearing table 116, the second adjusting screw 142 is arranged in the blind hole 111 through the second nut 132, and the second adjusting screw 142 is adjusted; then, the first nut 131 is disposed on the first stage 115, the first adjustment screw 141 is disposed in the blind hole 111 through the first nut 131, and the first adjustment screw 141 is adjusted.
The present application provides a dielectric resonator of a fourth 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 fifth 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 the size of the first blind via 117 is not equal to the 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 a cross-sectional area of the first blind hole 117 perpendicular to the axis a and a cross-sectional area of the second blind hole 118 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, or the third adjusting screw of the above embodiments, which will not be described herein.
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 at least:
the medium body is provided with at least one blind hole;
a metal layer covering the surface of the dielectric body;
the first nut is arranged in the blind hole;
and the first adjusting screw rod is arranged in the blind hole through the first nut.
2. The dielectric resonator of claim 1, wherein the blind hole further comprises a first hole section and a second hole section disposed along an axis of the blind hole, a cross-sectional area of the first hole section perpendicular to the axis being larger than a cross-sectional area of the second hole section perpendicular to the axis, the first nut being disposed within the first hole section.
3. The dielectric resonator of claim 2, wherein a junction of the first and second hole segments forms a first stage on which the first nut is disposed.
4. The dielectric resonator of claim 3, 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 section is of a smooth design, and the first rod section is partially provided with threads.
5. The dielectric resonator of claim 4, wherein a cross-sectional area of the second rod segment perpendicular to the axis is equal to a cross-sectional area of the second hole segment perpendicular to the axis.
6. A dielectric resonator according to claim 3, wherein the metal layer covers the first hole segment.
7. The dielectric resonator of claim 2, wherein the blind hole further comprises a third hole segment, the second hole segment having a larger cross-sectional area perpendicular to the axis than the third hole segment; a second bearing table is formed at the joint of the second hole section and the third hole section;
the dielectric resonator further comprises a second nut and a second adjusting screw rod, the second nut is arranged on the second bearing table, and the second adjusting screw rod is arranged in the blind hole through the second nut.
8. The dielectric resonator of claim 1, wherein the at least one blind via comprises a first blind via and a second blind via, the first blind via being of a size that is not equal to the size of the second blind via.
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 |
|---|---|---|---|
| CN2018125874 | 2018-12-29 | ||
| CNPCT/CN2018/125874 | 2018-12-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111384564A true CN111384564A (en) | 2020-07-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910208696.XA Withdrawn CN111384564A (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) | CN111384564A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111682291A (en) * | 2020-07-24 | 2020-09-18 | 中国电子科技集团公司第二十六研究所 | Dielectric filter coupling conversion structure and communication equipment |
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| WO2015124949A1 (en) * | 2014-02-24 | 2015-08-27 | Radio Design Limited | Ceramic waveguide filter apparatus |
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| CN105680125A (en) * | 2014-09-30 | 2016-06-15 | 天工方案公司 | Ceramic filter using stepped impedance resonators |
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| CN208208952U (en) * | 2018-01-23 | 2018-12-07 | 苏州艾通华通讯有限公司 | A kind of novel broad band low frequency resonator |
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|---|---|---|---|---|
| CN2598164Y (en) * | 2003-01-13 | 2004-01-07 | 奥雷通讯设备(上海)有限公司 | Electromagnetic coupling structure for coaxial cavity resonator |
| JP2007208556A (en) * | 2006-01-31 | 2007-08-16 | Ngk Spark Plug Co Ltd | Dielectric electronic part |
| KR101307107B1 (en) * | 2011-11-08 | 2013-09-11 | 주식회사 에이스테크놀로지 | Dielectric Resonator Filter |
| CN202888366U (en) * | 2012-10-12 | 2013-04-17 | 深圳市大富科技股份有限公司 | Filter cover plate and filter |
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Application publication date: 20200707 |