CN211700515U - Dielectric filter and communication apparatus - Google Patents
Dielectric filter and communication apparatus Download PDFInfo
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- CN211700515U CN211700515U CN202020820650.1U CN202020820650U CN211700515U CN 211700515 U CN211700515 U CN 211700515U CN 202020820650 U CN202020820650 U CN 202020820650U CN 211700515 U CN211700515 U CN 211700515U
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- 239000002184 metal Substances 0.000 claims abstract description 100
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- 230000008878 coupling Effects 0.000 claims description 7
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
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- 238000012545 processing Methods 0.000 abstract description 2
- 238000007747 plating Methods 0.000 description 14
- 238000010586 diagram Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000009713 electroplating Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000007772 electroless plating Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
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Abstract
The utility model provides a dielectric filter and communication equipment relates to wireless communication's technical field, and dielectric filter includes: a dielectric body and a metal cavity; the medium body is provided with a plurality of frequency blind holes, and the plurality of frequency blind holes divide the medium body into a plurality of resonant cavities; metal cavities are loaded at the bottom of the dielectric body and correspond to the resonant cavities, and the resonant cavities and the corresponding metal cavities form resonant units of the dielectric filter; the hollow area of the metal cavity is also provided with a metal probe, and the axial direction of the metal probe corresponds to the axial direction of the metal cavity; one end of the metal probe is connected to the lower surface of the medium body along the longitudinal direction, and the other end of the metal probe is connected to the bottom of the metal cavity. The embodiment of the utility model provides a dielectric filter and communication equipment can effectively reduce the volume and the weight of wave filter, and not only processing is convenient, has also further satisfied the communication demand to miniaturized development on the basis of realizing the performance.
Description
Technical Field
The utility model belongs to the technical field of wireless communication's technique and specifically relates to a dielectric filter and communications facilities are related to.
Background
With the rapid development of communication technology, wireless communication devices are increasingly tending to be miniaturized, and the requirements of wireless communication devices for high-sensitivity transmission/reception of signals are also increasingly high, so that filters are also becoming more and more important in wireless communication. Compared with the conventional cavity resonator, the filter has the advantages of low loss, low cost, high temperature stability, good harmonic suppression and the like.
However, the existing filters used in low-frequency band communication mostly have a phenomenon of large volume, and are difficult to meet the communication requirement of the wireless communication equipment developing towards miniaturization.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention is directed to a dielectric filter and a communication device to alleviate the above technical problems.
In a first aspect, an embodiment of the present invention provides a dielectric filter, including: a dielectric body and a metal cavity; the medium body is provided with a plurality of frequency blind holes, and the plurality of frequency blind holes divide the medium body into a plurality of resonant cavities; the metal cavity is loaded at the bottom of the resonant cavity, and the resonant cavity and the corresponding metal cavity form a resonant unit of the dielectric filter; the hollow area of the metal cavity is also provided with a metal probe, and the axial direction of the metal probe corresponds to the axial direction of the metal cavity; one end of the metal probe is connected to the lower surface of the medium body, and the other end of the metal probe is connected to the bottom of the metal cavity.
Preferably, in a preferred embodiment, the dielectric filter further includes a connection groove provided between two adjacent resonance units, for performing coupling adjustment between the resonance units.
Preferably, in a preferred embodiment, the connecting groove is a hollow groove, and the connecting groove is communicated or not communicated with the frequency blind holes of two adjacent resonance units.
Preferably, in a preferred embodiment, the connecting groove is disposed at the top of the frequency blind hole.
Preferably, in a preferred embodiment, the fastening portion of the hollow region of the metal cavity and the dielectric body is further provided with a first non-plated region and a plated region for tuning the frequency of the dielectric filter.
Preferably, in a preferred embodiment, the dielectric filter further includes an input/output port; the input and output port comprises a first port and a second port, wherein the first port and the second port are respectively arranged at the positions corresponding to the first resonant cavity and the last resonant cavity.
Preferably, in a preferred embodiment, the first port and the second port include a blind hole and a second non-plating area disposed at a predetermined position of the blind hole; wherein the axial direction of the blind hole extends to the inside of the dielectric body.
Preferably, in a preferred embodiment, the metal cavity and the dielectric body are connected by welding.
Preferably, in a preferred embodiment, the dielectric filter is further provided with a metalized plating layer, and the metalized plating layer is arranged on the outer surface of the dielectric body.
In a second aspect, the present invention provides a communication device, which is configured with the dielectric filter of the first aspect.
The embodiment of the utility model provides a following beneficial effect has been brought:
the embodiment of the utility model provides a dielectric filter and communication equipment, through set up a plurality of frequency blind holes on the dielectric body, can divide the dielectric body into a plurality of resonant cavities, and, the bottom of dielectric body and the position department that every resonant cavity corresponds are loaded with the metal cavity, resonant cavity and the metal cavity that corresponds form dielectric filter's resonance unit, and, still be provided with metal probe in the metal cavity, can realize the frequency control to dielectric filter at the design stage, thereby make dielectric filter realize required performance. Meanwhile, the mode of loading the metal cavity can effectively reduce the whole volume and weight of the dielectric filter, so that the dielectric filter is convenient to process, and the communication requirement for miniaturization development is further met on the basis of realizing performance.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
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 embodiments or the technical solutions in 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 for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a dielectric filter according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another dielectric filter according to an embodiment of the present invention;
fig. 3 is a schematic perspective view of a dielectric filter according to an embodiment of the present invention;
fig. 4 is a front view of a dielectric filter according to an embodiment of the present invention;
fig. 5 is a side view of a dielectric filter according to an embodiment of the present invention;
fig. 6 is a top view of a dielectric filter according to an embodiment of the present invention;
fig. 7 is a schematic perspective view of a metal cavity according to an embodiment of the present invention;
fig. 8 is a frequency response diagram of a dielectric filter according to an embodiment of the present invention.
Icon: 100-a dielectric body; 101-frequency blind hole; 200-a metal cavity; 201-metal probes; 104-a connecting groove; 305 — a first port; 306-a second port; 301-the top of the cavity wall of the metal cavity; 302-the top of the metal probe; 303-a first non-plating region; 304-a plating area; 307-blind holes; 308-second electroless plated area.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.
At present, with the rapid development of communication technology, wireless communication devices tend to be miniaturized more and more, but the filter used in low frequency band communication generally has a phenomenon of large volume, so that a filter with small volume, light weight, excellent performance and low cost is sought and important. Based on this, the embodiment of the utility model provides a dielectric filter and communication equipment can improve the phenomenon that the volume is bigger than usual of wave filter among the prior art.
To facilitate understanding of the present embodiment, a dielectric filter disclosed in the embodiments of the present invention will be described in detail first.
In a possible implementation manner, the present invention provides a dielectric filter, and in particular, the present invention provides a dielectric filter, including: a dielectric body and a metal cavity; the medium body is provided with a plurality of frequency blind holes, and the plurality of frequency blind holes divide the medium body into a plurality of resonant cavities;
and metal cavities are loaded at the bottom of the dielectric body and at positions corresponding to the resonant cavities, and the resonant cavities and the corresponding metal cavities form resonant units of the dielectric filter.
Specifically, the metal cavities are disposed on the lower surface of the dielectric body, and the number of the metal cavities corresponds to the number of the resonant units, so that each resonant unit is loaded with one metal cavity.
For the sake of understanding, fig. 1 shows a schematic structural diagram of a dielectric filter, and for the sake of description, the dielectric filter is described by taking an example in which 5 resonant units are disposed on the dielectric body.
As shown in fig. 1, the resonator comprises a dielectric body 100 and 5 frequency blind holes 101 arranged on the dielectric body 100, and a metal cavity 200 loaded by each resonant unit.
Specifically, the hollow region of the metal cavity 200 is also provided with a metal probe, and since fig. 1 shows a front view of the dielectric filter, the metal probe disposed inside the metal cavity is indicated by a dotted line, i.e., a metal probe 201 shown by a dotted line in fig. 1, and an axial direction of the metal probe corresponds to an axial direction of the metal cavity; one end of the metal probe is connected to the lower surface of the medium body, and the other end of the metal probe is connected to the bottom of the metal cavity.
Specifically, the direction shown by the Y-axis in fig. 1 is the longitudinal direction of the dielectric body, i.e., the axial direction of the metal probe and the metal cavity.
Further, the metal cavity is a hollow metal cavity, and therefore, the connection area of the metal cavity and each resonance unit is the top of the cavity wall of the metal cavity, and the area where the top of the metal probe is in contact with the medium body.
In practical use, the metal cavity can be round, square or any other shape; and the metal probe in the hollow area in the metal cavity can be in a round shape, a square shape or any other shape so as to meet the design requirement of frequency adjustment.
Further, in fig. 1, 5 frequency blind holes are included, and thus, 5 resonant cells may be formed, it being understood that the embodiment of fig. 1 including 5 frequency blind holes is only one possible exemplary manner. In other embodiments, the number of resonant cells may be set according to actual use.
Further, in fig. 1, set up with the form that a plurality of frequency blind holes were arranged in proper order, in other embodiments, a plurality of frequency blind holes can also be anomalous arrangement mode on the medium body, specifically also can set up according to the in-service use condition, the embodiment of the utility model provides a do not restrict to this yet.
The embodiment of the utility model provides a dielectric filter, through set up a plurality of frequency blind holes on dielectric body, can divide dielectric body into a plurality of resonant cavities, and, dielectric body's bottom is loaded with the metal cavity with the position department that every resonant cavity corresponds, and resonant cavity and the metal cavity that corresponds form dielectric filter's resonance unit to, still be provided with metal probe in the metal cavity, can realize the frequency control to dielectric filter at the design stage, thereby make dielectric filter realize required performance. Meanwhile, the mode of loading the metal cavity can effectively reduce the whole volume and weight of the filter, so that the filter is convenient to process, and the communication requirement for miniaturization development is further met on the basis of realizing performance.
In practical use, the dielectric filter further includes a connecting groove disposed between two adjacent resonant units for performing coupling adjustment between the resonant units;
the connecting groove is a hollow groove, and in order to realize coupling adjustment of different design requirements, the connecting groove is communicated or not communicated with the frequency blind holes of the two adjacent resonance units.
Further, the connecting groove may be configured in any other shape such as a square, a circle, or a trapezoid.
Further, the frequency blind holes are usually embedded into the dielectric body to divide the dielectric body into a plurality of resonant cavities, two adjacent frequency blind holes are connected through the connecting groove, and the connecting groove can also be set in a blind groove form and is set between the two adjacent frequency blind holes to connect or disconnect the two adjacent frequency blind holes, so that coupling adjustment between the resonant units is performed.
Further, for the convenience of understanding, fig. 2 shows a schematic structural diagram of another dielectric filter, and fig. 2 also illustrates an example in which a dielectric body is provided with 5 resonant units.
Specifically, in fig. 2, the frequency blind hole is illustrated as a circular blind hole, and the metal cavity is also circular, and a plurality of resonant units are sequentially arranged to form a resonant array, as shown in fig. 2, including: the frequency blind hole is formed in the dielectric body 100, the frequency blind hole 101, and a metal cavity 200 loaded by each resonant cavity, a metal probe 201 and a connecting groove 104 arranged in a hollow area of the metal cavity 200.
Further, as shown in fig. 2, the connection groove 104 is provided at the top of the frequency blind hole in the longitudinal direction, i.e. the connection groove is provided on the dielectric body and along the upper surface of the Y-axis, wherein the connection groove is provided in a square shape in fig. 2 and in the form of a blind groove.
In addition, in fig. 2, a connection groove is disposed between every two adjacent frequency blind holes, and the connection groove is respectively connected to the two adjacent frequency blind holes, so that the two adjacent frequency blind holes are communicated.
Further, the aperture size of spread groove also can set to the same dimension or unidimensional according to the demand, and specific form that sets up all can set up according to the in-service use condition, the embodiment of the utility model provides a do not restrict this.
Further, on the basis of fig. 2, fig. 3 also shows a schematic perspective structure diagram of a dielectric filter.
As shown in fig. 3, the dielectric body 100, the frequency blind via 101, the metal cavity 200, the metal probe 201 and the connecting slot 104 shown in fig. 2 are included.
Specifically, in the dielectric filter shown in fig. 3, the dielectric body may be divided into 5 resonant cavities by providing frequency blind holes on the dielectric body, the resonant units formed by two adjacent frequency blind holes are connected through the connecting groove to perform coupling adjustment between the resonant units, each resonant unit is loaded with one metal cavity, the metal cavity is disposed on the lower surface of the dielectric body along the longitudinal direction, the hollow region in the metal cavity is provided with one metal probe, the connection region between the metal cavity and each resonant unit is 301 and 302 in fig. 3, that is, the top 301 of the cavity wall of the metal cavity, and the region where the top 302 of the metal probe contacts the dielectric body.
Further, the embodiment of the utility model provides a dielectric filter still is provided with first non-electroplating district and electroplating district at the hollow region in metal cavity and the mutual lock joint part of medium body for tune dielectric filter's frequency.
Specifically, as shown in fig. 3, the first electroless plating region 303 and the plating region 304 are shown, wherein the first electroless plating region 303 and the plating region 304 in fig. 3 are configured in a circular shape or a circular ring shape, in other embodiments, the shape of the first electroless plating region and the plating region may also be any other shape, and any other size, and may be further configured according to the actual use situation, which is not limited by the embodiment of the present invention.
Further, the dielectric filter provided by the embodiment of the present invention further includes an input/output port; specifically, the input/output port includes a first port and a second port, such as the first port 305 and the second port 306 shown in fig. 2 and fig. 3, wherein the first port 305 and the second port 306 are respectively disposed at the first and the last two positions corresponding to the resonant cavities, wherein, in the embodiment shown in fig. 2 and fig. 3, the resonant units are sequentially arranged to form an array, at this time, the first and the last positions of the array, that is, the positions where the first port and the second port are not disposed, in other embodiments, if the plurality of frequency blind holes are irregularly arranged on the dielectric body, at this time, the first and the last positions may be designated at the design stage, that is, the first and the last resonant cavities are designated, so as to facilitate the arrangement of the first port and the second port, and particularly, the arrangement may be performed according to an actual use situation, which is not limited by the embodiments of the present invention.
In specific implementation, the first port and the second port comprise a blind hole and a second non-electroplating area arranged at a preset position of the blind hole; for convenience of illustration, only the blind hole 307 of the second port 306 and the second non-plating region 308 are shown in fig. 3, wherein the axial direction of the blind hole extends to the inside of the dielectric body, and in fig. 3, the axial direction of the first port and the second port is shown to be consistent with the longitudinal direction of the dielectric body, that is, along the Y-axis, thereby constituting a miniaturized dielectric filter suitable for low frequency bands.
The second non-plating area 308 is disposed around the blind hole 307, and the shape of the blind hole and the second non-plating area may be circular, or may also be oval, square, or any other shape, etc., where fig. 3 only shows a circular implementation manner, and in other implementation manners, the shape of the blind hole and the second non-plating area may also be set according to an actual use situation, which is not limited by the embodiment of the present invention.
Further, in fig. 1 to 3, the resonant cavities divided by the resonant holes correspond to the metal cavities one to one, but in actual use, the metal probe of the metal cavity does not necessarily need to correspond to the center of the bottom of the resonant hole, and can be adjusted according to actual design requirements.
Furthermore, the frequency adjusting mode of the dielectric filter can realize the debugging of the frequency by polishing the area of the electroplating area.
In addition, the metal cavity and the dielectric body can be connected in a welding mode, and the dielectric filter can be further provided with a metalized coating which is arranged on the outer surface of the dielectric body to shield signal leakage.
Further, fig. 4 also shows a front view of a dielectric filter, corresponding to the dielectric filter shown in fig. 3, including the dielectric body 100, the frequency blind via 101, the metal cavity 200, the metal probe 201 and the connection groove 104, and the first port 305 and the second port 306.
Further, fig. 5 also shows a side view of the dielectric filter, and fig. 6 shows a top view of the dielectric filter, corresponding to a front view of the dielectric filter shown in fig. 4. Further, fig. 7 also shows a schematic perspective structure of a metal cavity, and fig. 7 also shows a metal probe 201 in an inner hollow region.
In the embodiment of the present invention, the dielectric filter shown in the above drawings is described by taking an example in which the dielectric body is provided with 5 resonance units, and fig. 8 further shows a frequency response diagram of the dielectric filter including 5 resonance units.
It should be understood that the dielectric filter provided by the embodiments of the present invention is not limited to the implementation that includes 5 resonant units shown in the above drawings, and in other embodiments, the number of resonant units, and the shapes or parameters of the frequency blind holes, the metal cavities, the connecting grooves, the non-plating areas, the plating areas, and other structures may have other setting manners, and particularly, the present invention is not limited thereto.
To sum up, the embodiment of the utility model provides a dielectric filter can realize the miniaturized dielectric filter of a low frequency band, through carrying out certain adjustment that sets up on a fritter dielectric body to load certain metal cavity, can realize the required performance, simultaneously, above-mentioned novel dielectric filter has that the regulative mode is simple, and processing is convenient, and flexible operation's characteristics provide new direction for current low frequency band dielectric filter's miniaturized development.
Further, on the basis of the dielectric filter provided by the above embodiment, the embodiment of the present invention also provides a communication device, and the communication device is provided with the above dielectric filter.
The embodiment of the utility model provides a communication equipment, the dielectric filter who provides with above-mentioned embodiment has the same technical characteristic, so also can solve the same technical problem, reaches the same technological effect.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the communication device described above may refer to the corresponding process in the foregoing embodiment, and is not described herein again.
In addition, in the description of the embodiments of the present invention, 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 meaning of the above terms in the present invention can be understood in specific cases for those skilled in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, 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.
Finally, it should be noted that: the above embodiments are only specific embodiments of the present invention, and are not intended to limit the technical solution of the present invention, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: those skilled in the art can still modify or easily conceive of changes in the technical solutions described in the foregoing embodiments or make equivalent substitutions for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A dielectric filter, comprising: a dielectric body and a metal cavity;
the medium body is provided with a plurality of frequency blind holes, and the plurality of frequency blind holes divide the medium body into a plurality of resonant cavities;
the metal cavity is loaded at the position corresponding to each resonant cavity at the bottom of the dielectric body, and the resonant cavities and the corresponding metal cavities form a resonant unit of the dielectric filter;
the hollow area of the metal cavity is also provided with a metal probe, and the axial direction of the metal probe corresponds to the axial direction of the metal cavity;
one end of the metal probe is connected to the lower surface of the medium body, and the other end of the metal probe is connected to the bottom of the metal cavity.
2. A dielectric filter as recited in claim 1, further comprising coupling grooves provided between adjacent two of the resonant cells for coupling adjustment between the resonant cells.
3. A dielectric filter as recited in claim 2, wherein the connecting slots are hollow slots, and the connecting slots are in communication with or not in communication with the frequency blind holes of two adjacent resonance units.
4. A dielectric filter as recited in claim 3, wherein the connection slots are disposed at the top of the frequency blind holes.
5. A dielectric filter according to claim 1, wherein the hollow region of the metal cavity and the dielectric body are further provided with a first non-plated region and a plated region for tuning the frequency of the dielectric filter.
6. The dielectric filter of claim 1, further comprising an input-output port;
the input and output port comprises a first port and a second port, wherein the first port and the second port are respectively arranged at the positions corresponding to the first resonant cavity and the last resonant cavity.
7. The dielectric filter of claim 6, wherein the first port and the second port comprise a blind via and a second electroless plated area disposed at a predetermined location of the blind via;
wherein an axial direction of the blind hole extends to an interior of the dielectric body.
8. The dielectric filter of claim 1, wherein the metal cavity is connected to the dielectric body by welding.
9. A dielectric filter as claimed in any one of claims 1 to 8, wherein the dielectric filter is further provided with a metallised coating, the metallised coating being provided on an outer surface of the dielectric body.
10. A communication apparatus, characterized in that the communication apparatus is provided with the dielectric filter according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020820650.1U CN211700515U (en) | 2020-05-15 | 2020-05-15 | Dielectric filter and communication apparatus |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020820650.1U CN211700515U (en) | 2020-05-15 | 2020-05-15 | Dielectric filter and communication apparatus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111403874A (en) * | 2020-05-15 | 2020-07-10 | 摩比天线技术（深圳）有限公司 | Dielectric filter and communication apparatus |
| CN113300064A (en) * | 2021-04-27 | 2021-08-24 | 大富科技(安徽)股份有限公司 | Hybrid cavity, filter and communication base station |
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2020
- 2020-05-15 CN CN202020820650.1U patent/CN211700515U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111403874A (en) * | 2020-05-15 | 2020-07-10 | 摩比天线技术（深圳）有限公司 | Dielectric filter and communication apparatus |
| CN113300064A (en) * | 2021-04-27 | 2021-08-24 | 大富科技(安徽)股份有限公司 | Hybrid cavity, filter and communication base station |
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