CN109818121A - Cavity body filter part and its cavity cover plate assembly - Google Patents
Cavity body filter part and its cavity cover plate assembly Download PDFInfo
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- CN109818121A CN109818121A CN201910167858.XA CN201910167858A CN109818121A CN 109818121 A CN109818121 A CN 109818121A CN 201910167858 A CN201910167858 A CN 201910167858A CN 109818121 A CN109818121 A CN 109818121A
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Abstract
The present invention relates to a kind of cavity body filter part and its cavity cover plate assemblies.Cover board include substrate, cover in outer surface of substrate metal layer and be formed in the sheet metal of substrate inner surface.Cover board position corresponding with resonant cavity and coupling channel offers debugging via hole.Traditional metal cover board is substituted using the cover board of printed board structure, metal layer and metal cavity cooperate, and form closed shielding space, sheet metal is coupled or is electrically connected with corresponding resonant column, to be effectively reduced resonance frequency.As it can be seen that can also reach corresponding index request in the case where not using the movable resonant column of tep reel, therefore only need lesser metal cavity height.The depth of metal cavity is inserted into, it can be achieved that resonance frequency and coupling amount are adjustable by control tuning plug.Moreover, tuning plug redundance is sheared, the flush with outer surface of end and cover board.Therefore, above-mentioned cavity body filter part is while guaranteeing superior electrical index, moreover it is possible to realize miniaturization, lightweight and low cost.
Description
Technical field
The present invention relates to mobile communication technology field, in particular to a kind of cavity body filter part and its cavity cover plate assembly.
Background technique
The introducing of 5G Missive MIMO technology, so that be significantly increased with antenna integrated integrated filter quantity, it is right
More stringent requirements are proposed for weight, volume, the cost of filter.Currently, common base station filters type has metal cavity filter
Wave device and Ceramic Dielectric Filter, although Ceramic Dielectric Filter has the advantages that lightweight and small size, current technique hair
It opens up not mature enough, produces consistency and cost in batches and all have biggish challenge.Currently, small in order to quickly 5G be promoted to build
Type metal cavity filter becomes preferred transition scheme.
But due to 5G filter small size, lightweight, the requirement of low cost, existing metal cavity filter it is small
Type scheme is not fully up to expectations.For example, using the movable resonant column of tep reel, for the reduction frequency in small size in order to more
Mend various errors and use self-locking screw rod or tap scheme and debug etc., cannot meet simultaneously small size, lightweight, it is low at
This requirement.
Summary of the invention
Based on this, it is necessary to for the defect of existing metal cavity filter, provide a kind of in guarantee superior electrical index
While, moreover it is possible to realize miniaturization, lightweight, low cost cavity body filter part and its cavity cover plate assembly.
A kind of cavity cover plate assembly, comprising:
Cover board, including with opposite outer surface and inner surface substrate, cover in the metal layer of the outer surface of substrate,
The preset coupling regime of substrate inner surface is formed with multiple sheet metals, and the preset tuning region of cover board offers multiple
Debug via hole；And
The tuning plug that can be sheared, the tuning plug can be arranged in the debugging via hole, and along the axis of the debugging via hole
To operationally sliding.
The predeterminated position of the substrate inner surface is covered with metal strip to form welding section in one of the embodiments,
Domain, the welding region are formed with the metallization shielding via hole for connecting the metal layer and the metal strip.
The tuning plug is metal needle in one of the embodiments, and the cross section of the metal needle is in polygon.
The tuning plug is self-tapping screw in one of the embodiments,.
A kind of cavity body filter part, comprising:
Metal cavity is the hollow structure of a side opening, is formed through coupling channel phase mutual coupling in the metal cavity
The multiple resonant cavities closed are provided with resonant column in each resonant cavity；And
Cavity cover plate assembly as described in any one of above preferred embodiment, in which:
The cover plate lid be set to the metal cavity opening, the multiple sheet metal respectively with the multiple resonant cavity pair
It answers, and each resonant column is coupled with the corresponding sheet metal and insulated with the metal layer, the debugging via hole difference
It is corresponding with the multiple resonant cavity and the coupling channel；
The tuning plug is arranged in the debugging via hole and protrudes into the metal cavity predetermined depth, and the tuning plug is prominent
It is sheared in the part of the outer surface.
The resonant column is integrally formed structures with the metal cavity in one of the embodiments,.
The resonant column is hollow columnar structures in one of the embodiments, and corresponding with the resonant column described
One end of tuning plug is non-contactly arranged in the resonant column.
It in one of the embodiments, further include medium socket, the medium socket is sheathed on the tuning plug and is held on institute
It states between the outer wall of tuning plug and the inner wall of the resonant column.
The resonant column abuts with the corresponding sheet metal and realizes electrical connection in one of the embodiments,；
Or the top surface of the resonant column is arranged with the corresponding sheet metal interval, and the sheet metal and the metal
Layer electrical connection.
When the sheet metal is electrically connected with the metal layer in one of the embodiments, the cover board and the metal
The corresponding position of piece offers metallization connecting hole, to be electrically connected the sheet metal and the metal layer.
Above-mentioned cavity body filter part, traditional metal cover board, metal layer and metal are substituted using the cover board of printed board structure
Cavity cooperation, forms closed shielding space, sheet metal is coupled or is electrically connected with corresponding resonant column, to be effectively reduced
Resonance frequency.As it can be seen that can also reach corresponding index request in the case where not using the movable resonant column of tep reel, therefore only need
Lesser metal cavity height.The depth of metal cavity is inserted into, it can be achieved that resonance frequency and coupling amount can by control tuning plug
It adjusts.Moreover, tuning plug redundance is sheared, the flush with outer surface of end and cover board.Therefore, above-mentioned cavity body filter part exists
While guaranteeing superior electrical index, the miniaturization, lightweight and low cost of filter are realized.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of cavity body filter part in present pre-ferred embodiments；
Fig. 2 is the structural schematic diagram of cavity body filter part cover plate shown in Fig. 1；
Fig. 3 is the structural schematic diagram of another angle of cavity body filter part cover plate shown in Fig. 1.
Specific embodiment
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing
Give preferred embodiment of the invention.But the invention can be realized in many different forms, however it is not limited to herein
Described embodiment.On the contrary, purpose of providing these embodiments is keeps the understanding to the disclosure more saturating
It is thorough comprehensive.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement are for illustrative purposes only.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more phases
Any and all combinations of the listed item of pass.
Referring to Fig. 1, the present invention provides a kind of cavity body filter part 100 and cavity cover plate assembly (figure is not marked), the chamber
Fluid filter part 100 can be any one of communication devices such as filter, duplexer and combiner.Wherein, the present invention is preferable
Cavity body filter part 100 in embodiment includes metal cavity 110 and cavity cover plate assembly.Cavity cover plate assembly includes cover board
120 and tuning plug 130.
Metal cavity 110 is the hollow structure of a side opening.It is general elongated, cavity is formed with along longitudinally.Gold
Belong to and be formed with multiple resonant cavities (figure is not marked) in cavity 110, multiple resonant cavities are intercoupled simultaneously by coupling channel (not shown)
It is sequentially connected with, to constitute filtering access.The side wall of metal cavity 110 is provided with Signal connector 113, head and the tail two resonant cavities point
Corresponding Signal connector 113 is not connected, to realize the input or output of signal.Specifically, multiple resonant cavities are coaxial resonant cavity.
According to electrical specifications needs, inductive coupled or capacitive coupling is realized by windowing or winged bar between each resonant cavity.At this point, coupling is logical
Road then respectively corresponds to open a window or fly bar.
Resonant column 111 is provided in each resonant cavity.Specifically in the present embodiment, resonant column 111 is with metal cavity 110
Integrally formed structure.Wherein, resonant column 111 can by integrated die-casting or mach form and 110 one of metal cavity at
Type.Compared with the form of the moving reel resonant column used in conventional small filter, cost can be significantly reduced.
Please refer to figs. 2 and 3 together, and cover board 120 is covered on the opening of metal cavity 110.Therefore, cover board 120 and metal
Cavity 110 cooperates, and the closed shielding space transmitted for signal is formed inside metal cavity 110.Wherein, cover board 120 includes
Substrate 121, metal layer 123 and sheet metal 125.
Substrate 121 is isolation material, plate-like and match with 110 opening shape of metal cavity.Substrate 121 is towards metal
The surface of 110 inner wall of cavity is referred to as inner surface, and the surface of the opposite other side is referred to as outer surface.Metal layer 123 cover in
The outer surface of substrate 121.Specifically, metal layer 123 can be by the gold such as copper film, aluminium film that modes are formed such as being deposited, sputtering
Belong to film layer structure.
121 inner surface of substrate has preset coupling regime (figure is not marked), the position pair of coupling regime and multiple resonant cavities
It answers.Multiple sheet metals 125 are formed in coupling regime.That is, sheet metal 125 is corresponding with the position of multiple resonant cavities.Therefore,
Sheet metal 125 can realize coupling or electrical connection with the resonant column 111 in corresponding resonant cavity.Wherein, sheet metal 125 can pass through elder generation
In 121 inner surface entirety plated film of substrate, then etch to obtain preset shape and the metal foil structure positioned at predeterminated position.Sheet metal
125 is general rounded, certainly can also be in rectangle or other arbitrary shapes.
Each resonant column 111 is coupled or is electrically connected with corresponding sheet metal 125, and is insulated with metal layer 123, thus not
Resonance frequency is effectively reduced under the premise of increasing by 111 structure of resonant column.
In one embodiment, resonant column 111 abuts with corresponding sheet metal 125 and realizes electrical connection, sheet metal 125 with
It insulate between metal layer 123.
Specifically, resonant column 111 is column structure, and top surface is extended to be contacted with corresponding sheet metal 125.Pass through weldering
It connects, resonant column 111 can be electrically connected with sheet metal 125.At this point, sheet metal 125 is equivalent to the resonance plate of resonant column 111, thus
The resonance frequency of resonant column 111 is significantly reduced with lower cost and lesser resonance column dimension.
In another embodiment, the top surface of resonant column 111 is spaced with corresponding sheet metal 125 and is arranged, and sheet metal 125
Be electrically connected with metal layer 123 and with cavity 110 altogether.In this way, passing through the capacitive between 111 top surface of sheet metal 125 and resonant column
Coupling, can be effectively reduced resonance frequency.Meanwhile the structure also improves the Q value of cavity body filter part 100, reduces insertion
Loss.
For realize sheet metal 125 with metal layer 123 is good is electrically connected, further, in the present embodiment, cover board 120
Position corresponding with sheet metal 125 offers metallization connecting hole 126, to be electrically connected sheet metal 125 and metal layer 123.
Specifically, metallization connecting hole 126 is metallization VIA, electric action is played, thus to be realized with a low cost gold
Category piece 125 is electrically connected with metal layer 123.Moreover, multiple weeks along sheet metal 125 are generally distributed on each sheet metal 125
To the metallization connecting hole 126 of setting.
Cover board 120 has preset tuning region (figure is not marked), the position in tuning region and multiple resonant cavities and coupling channel
Set correspondence.Moreover, tuning region offers multiple debugging via holes 127.That is, multiple debugging via holes 127 respectively with it is multiple
The position of resonant cavity and coupling channel is corresponding.Debugging via hole 127 is metallization VIA, and hole wall is electrically conductive.Via hole 127 is debugged to wrap
Two parts are included, a portion passes through on sheet metal 125, can be used for that the resonance frequency of resonant cavity is adjusted.Another portion
Divide the then coupling channel across two adjacent resonant cavities, can be used for adjusting the coupling amount of two neighboring resonant cavity
Section.
Wherein, debugging via hole 127 does not contact directly with sheet metal 125.Specifically, sheet metal 125 is opened along debugging via hole 127
The circumferential direction of mouth offers groove (not shown), and sheet metal 125 is isolated with debugging via hole 127.
Tuning plug 130 can be sheared.Specifically, tuning plug 130 can be thinner or softer metal rod, can also by
Breakpoint arrangement is arranged on tuning plug 130 to realize and can shear.Be with 130 quantity of tuning plug that be adapted to of debugging via hole 127 it is multiple, adding
It can be selected as needed when work cavity body filter part 100.Tuning plug 130 can be arranged in debugging via hole 127, and along debugging via hole
127 axial direction is operationally slided.Therefore, tuning plug 130 is operated, controllable tuning plug 130 protrudes into the depth in metal cavity 110
Degree.
Tuning plug 130 protrudes into the difference of depth, and coupling amount is also different, to realize the resonance frequency to each resonant cavity
And the adjusting of the coupling amount between two neighboring resonant cavity.When manufacturing cavity body filter part 100, first tuning plug 130 is penetrated
Via hole 127 is debugged, then by that can realize 100 electricity of cavity body filter part along the axial movement tuning plug 130 for debugging via hole 127
The debugging of gas parameter.After the completion of debugging, tuning plug 130 and metal layer 123 are welded, and by the modes such as shearing, machining
Except tuning plug 130 protrudes from the part of 120 outer surface of lid, the volume of cavity body filter part 100 can be further decreased.
Tuning plug 130 is generally metallic rod shaped structure, can be screw rod or polished rod.In one embodiment, tuning plug 130
For metal needle, and the cross section of metal needle is in polygon.Metal needle construction is simple, at low cost, can further decrease cavity filtering
The cost of device 100.Moreover, the cross section of metal needle is polygon, therefore can be with debugging 127 phase clamping of via hole.Therefore, metal needle
It is not easy to loosen in debugging process.Wherein, the cross section of common metal needle is square.
In another embodiment, tuning plug 130 can also be self-tapping screw.The self-tapping screw is different from common screw,
Do not include nut and bolt head, can be realized and be turned by similar means such as allen wrenches.Accordingly, debugging via hole 127 can be with
It is the through-hole that aperture is slightly less than self-tapping screw outer diameter.When debugging, tune can be strutted in smaller range by turning self-tapping screw
Via hole 127 is tried, realizes self tapping.At this point, self-tapping screw can cooperate closely in debugging process with debugging via hole 127 always, avoid
It loosens.
In the present embodiment, resonant column 111 is hollow columnar structures, and the one of tuning plug 130 corresponding with resonant column 111
End is non-contactly arranged in resonant column 111.The partially-tuned bar 130 refers to that the resonance frequency to each resonant cavity is adjusted
The tuning plug 130 of section.By the way that resonant column 111 and tuning plug 130 are socketed, it is possible to increase the relative area of the two, and then increase coupling
Resultant, to further decrease the resonance frequency of resonant cavity.
Further, in the present embodiment, cavity body filter part 100 further includes medium socket 140.Medium socket 140 is sheathed on
Tuning plug 130 is simultaneously held between the outer wall of tuning plug 130 and the inner wall of resonant column 111.
Specifically, medium socket 140 is generally the isolation materials such as plastics, rubber, silica gel, it is possible to increase tuning plug 130 and resonance
Frictional force between column 111.Therefore, utilization biggish frictional force between the two can play limit and fixation when adjusting,
Tuning plug 130 continues to be subjected to displacement after the completion of preventing tuning plug 130 from loosening and debugging.Meanwhile medium socket 140 can also prevent
111 short circuit of tuning plug 130 and resonant column, and the capacitive coupling amount of increase between the two is to further decrease resonance frequency.
In the present embodiment, cover board 120 is fixed on metal cavity 110 by welding.It is fastened with traditional screw
Mode compare, welding manner can reduce the height of metal cavity 110, to be conducive to the miniaturization of cavity body filter part 100.
Further, in the present embodiment, the predeterminated position of 121 inner surface of substrate is covered with metal strip 129 to form weldering
Connect region (figure is not marked).Metal strip 129 is also the metal layer structure of bar shaped, and molding mode can be identical as sheet metal 125.But
It is that metal strip 129 is isolated with sheet metal 125.Wherein, welding region and the profile of 110 cavity wall of metal cavity match.
Specifically, welding region is normally at the cavity wall between the edge and resonant cavity of cover board 120.Welding region is formed
There is the metallization of connection metal layer 123 and metal strip 129 shielding via hole 128, so that the two realization is electrically connected altogether.
When installing cover board 120, by the cavity wall of welding region alignment metal cavity 110, and by metal strip 129 and metal cavity
110 cavity wall realizes welding, thus fixed cover board 120.Metal strip 129 and metallization shielding via hole 128 cooperate, and realize metal layer
123 are electrically connected altogether with metal cavity 110.
Above-mentioned cavity body filter part 100 substitutes traditional metal cover board, metal layer using the cover board 120 of printed board structure
123 cooperate with metal cavity 110, form closed shielding space, sheet metal 125 is coupled with corresponding resonant column 111 or electricity
Connection, to be effectively reduced resonance frequency.As it can be seen that can also reach phase in the case where not using the movable resonant column of tep reel
The index request answered, therefore only need lesser 110 height of metal cavity.The depth of metal cavity 110 is inserted by control tuning plug 130
Degree is, it can be achieved that resonance frequency and coupling amount are adjustable.Moreover, 130 redundance of tuning plug is sheared, end and cover board 120
Flush with outer surface.Therefore, above-mentioned cavity body filter part 100 realizes miniaturization, light weight while guaranteeing superior electrical index
Change and inexpensive.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of cavity cover plate assembly characterized by comprising
Cover board, including with opposite outer surface and inner surface substrate, cover in the metal layer of the outer surface of substrate, it is described
The preset coupling regime of substrate inner surface is formed with multiple sheet metals, and the preset tuning region of cover board offers multiple debugging
Via hole；And
Multiple tuning plugs sheared of the debugging via hole are adapted to, the tuning plug can be arranged in the debugging via hole,
And it is operationally slided along the axial direction of the debugging via hole.
2. cavity cover plate assembly according to claim 1, which is characterized in that the predeterminated position of the substrate inner surface covers
There is metal strip to form welding region, the welding region is formed with the metallization screen for connecting the metal layer and the metal strip
Cover via hole.
3. cavity cover plate assembly according to claim 1, which is characterized in that the tuning plug is metal needle, and the gold
The cross section for belonging to needle is in polygon.
4. cavity cover plate assembly according to claim 1, which is characterized in that the tuning plug is self-tapping screw.
5. a kind of cavity body filter part characterized by comprising
Metal cavity is the hollow structure of a side opening, is formed through what coupling channel intercoupled in the metal cavity
Multiple resonant cavities are provided with resonant column in each resonant cavity；And
Such as the described in any item cavity cover plate assemblies of above-mentioned Claims 1-4, in which:
The cover plate lid is set to the opening of the metal cavity, and the multiple sheet metal is corresponding with the multiple resonant cavity respectively,
And each resonant column and corresponding sheet metal coupling and insulate with the metal layer, the debugging via hole respectively with institute
It states multiple resonant cavities and the coupling channel is corresponding；
The tuning plug is arranged in the debugging via hole and protrudes into the metal cavity predetermined depth, and the tuning plug protrudes from institute
The part for stating outer surface is sheared.
6. cavity body filter part according to claim 5, which is characterized in that the resonant column is one with the metal cavity
Body formed structure.
7. cavity body filter part according to claim 5, which is characterized in that the resonant column is hollow columnar structures, and
One end of the tuning plug corresponding with the resonant column is non-contactly arranged in the resonant column.
8. cavity body filter part according to claim 7, which is characterized in that further include medium socket, the medium socket is arranged
In the tuning plug and it is held between the outer wall of the tuning plug and the inner wall of the resonant column.
9. according to the described in any item cavity body filter parts of claim 5 to 7, which is characterized in that the resonant column with it is corresponding
The sheet metal abuts and realizes electrical connection；
Or the top surface of the resonant column is arranged with the corresponding sheet metal interval, and the sheet metal and metal layer electricity
Connection.
10. cavity body filter part according to claim 9, which is characterized in that the sheet metal is electrically connected with the metal layer
When connecing, cover board position corresponding with the sheet metal offers metallization connecting hole, to be electrically connected the sheet metal and institute
State metal layer.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811535232 | 2018-12-14 | ||
| CN2018115352321 | 2018-12-14 |
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| Publication Number | Publication Date |
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| CN109818121A true CN109818121A (en) | 2019-05-28 |
| CN109818121B CN109818121B (en) | 2023-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910167858.XA Active CN109818121B (en) | 2018-12-14 | 2019-03-06 | Cavity filter device and cavity cover plate assembly thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110677135A (en) * | 2019-10-28 | 2020-01-10 | 北京联恒众达科技中心(有限合伙) | Multichannel isolation filter box structure convenient to maintain and debug |
| CN111009709A (en) * | 2019-12-25 | 2020-04-14 | 京信通信技术(广州)有限公司 | Band elimination filter and combiner |
| CN112968287A (en) * | 2021-04-06 | 2021-06-15 | 广州智讯通信系统有限公司 | Tunable slot antenna and multi-band antenna system |
| CN114055606A (en) * | 2020-07-29 | 2022-02-18 | 广东博智林机器人有限公司 | Mould welt subassembly and mould device |
| CN114614223A (en) * | 2022-03-23 | 2022-06-10 | 京信射频技术(广州)有限公司 | Base station antenna and cavity filter |
| CN114927843A (en) * | 2022-05-16 | 2022-08-19 | 京信射频技术(广州)有限公司 | Filter and communication device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110677135A (en) * | 2019-10-28 | 2020-01-10 | 北京联恒众达科技中心(有限合伙) | Multichannel isolation filter box structure convenient to maintain and debug |
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| CN111009709B (en) * | 2019-12-25 | 2024-03-26 | 京信通信技术(广州)有限公司 | Band-stop filter and combiner |
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| CN114614223A (en) * | 2022-03-23 | 2022-06-10 | 京信射频技术(广州)有限公司 | Base station antenna and cavity filter |
| CN114614223B (en) * | 2022-03-23 | 2023-11-24 | 京信射频技术(广州)有限公司 | Base station antenna and cavity filter |
| CN114927843A (en) * | 2022-05-16 | 2022-08-19 | 京信射频技术(广州)有限公司 | Filter and communication device |
| CN114927843B (en) * | 2022-05-16 | 2023-11-24 | 京信射频技术(广州)有限公司 | Filter and communication device |
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|---|---|
| CN109818121B (en) | 2023-09-29 |
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