CN209088073U - Antenna system and electronic equipment - Google Patents
Antenna system and electronic equipment Download PDFInfo
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- CN209088073U CN209088073U CN201822182430.6U CN201822182430U CN209088073U CN 209088073 U CN209088073 U CN 209088073U CN 201822182430 U CN201822182430 U CN 201822182430U CN 209088073 U CN209088073 U CN 209088073U
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Abstract
The utility model provides a kind of antenna system and electronic equipment, wherein antenna system, comprising: substrate；First antenna mould group, is installed on substrate；Second antenna modules, are installed on substrate；Wherein, substrate has the first second side adjacent while first, and first antenna mould group is located on substrate at the position on corresponding first side, and the second antenna modules are located on substrate at the position on corresponding second side.Pass through the technical solution of the utility model, two antenna modules are separately positioned at the position on two sides adjacent on substrate, compared to the scheme for being disposed on the substrate two opposite sides, the space of substrate side can be efficiently used, space utilization rate is improved, and then reduces the occupied space of antenna system；Meanwhile, it is capable to which two antenna modules are isolated, the integral radiation performance of antenna system is improved.
Description
Technical field
The utility model relates to fields of communication technology, in particular to a kind of antenna system and a kind of electronic equipment.
Background technique
Antenna is intelligent terminal transmitting/receiving wireless signal front end component, and work is when emitting, and antenna is by the high-frequency current in circuit
Or the guided wave on feeding transmission line is efficiently converted into certain polarized spatial electromagnetic wave, launches to defined direction,
When receiving, opposite transformation is carried out.The quality of antenna performance directly influences the speech quality and data downloading of intelligent terminal
Speed.With the fast development of wireless communication technique, consumer requires radio communication quality higher and higher, traditional single antenna
Transmit-receive technology is not only easy to be influenced by unfavorable factors such as multipath transmisstions, keeps link performance unstable, and data transmission speed
Rate is relatively low.For the multipath fading in mobile communication and improve link stability, MIMO (Multiple-Input
Multiple-Output, multi-input multi-output system) technology be current wireless communication field an important innovations research item
Mesh, by using more antennas (equipment end or base station end) in smart machine, so that transmitting terminal or receiving end receive more
Signal space stream can significantly improve channel capacity.Therefore it needs to make great efforts always to promote to meet the requirement of high rate data transmission
The evolution of MIMO technology, for example current 4 × 4MIMO has been increased to from 2 × 2.But more antennas also imply that occupancy is more
Space, accommodated in the limited equipment in space into more antennas obviously becomes more difficult, especially in upcoming 5G
(the 5th third-generation mobile communication technology) mobile terminal antenna system needs to meet 8 × 8MIMO.
For mobile terminal, peripheral components are more and more, such as camera, microphone, flash lamp, leave Antenna Design sky for
Between it is smaller and smaller, be limited to package size, installation mutiple antennas is highly difficult because under narrow terminating machine size, day
Spacing between line unit is small, causes the coupling between antenna stronger, and the close coupling between mimo antenna unit will make day
Radiation efficiency between line reduces, so that the advantage of mimo antenna technology can not be played.Therefore the antenna closely placed is reduced
Between coupling technical problem urgently to be resolved when becoming the design of Miniature Terminal MIMO scheme.
In addition, up to 10 (or even 10 or more) antenna elements are designed in narrow mobile phone, wherein 2 are LTE (Long
Term Evolution, long term evolution) antenna element, 8 5G antenna elements need to face many problems, such as antenna list
Arrangement problems between member, the isolating problem between antenna element.Especially current antenna for mobile phone designs on top and bottom end
The design of LTE antenna is contributed to, the intermediate space for being used to design 5G antenna element is thus correspondingly reduced, causes 5G days
Isolation between line unit closer to.The isolating problem how solved between antenna element is challenging.
So, the isolating problem between antenna element how is solved in the case where space length very little, improves antenna list
It is also a difficult point that the radiance of member, which is a urgent problem to be solved,.
Utility model content
The utility model aims to solve at least one of technical problems existing in the prior art or related technologies.
For this purpose, one of the utility model is designed to provide a kind of antenna system, substrate side can be efficiently used
Space, and solve the problems, such as in the decoupling in narrow mobile phone space between 5G antenna element.
Another of the utility model is designed to provide a kind of electronic equipment.
To achieve the above object, the technical solution of the utility model first aspect provides a kind of antenna system, comprising: base
Plate；First antenna mould group, is installed on substrate；Second antenna modules, are installed on substrate；Wherein, substrate have the first side with
And with first at adjacent second, first antenna mould group is located on substrate at the position on corresponding first side, the second antenna modules
On substrate at the position on corresponding second side.
In the technical scheme, by the way that two antenna modules to be separately positioned on to the position on two sides adjacent on substrate
Place can efficiently use the space of substrate side compared to the scheme for being disposed on the substrate two opposite sides, improve space benefit
With rate, and then reduce the occupied space of antenna system；Meanwhile, it is capable to which two antenna modules are isolated, aerial system is improved
The integral radiation performance of system.
In addition, the antenna system in above-mentioned technical proposal provided by the utility model can also have following supplementary technology special
Sign:
In the above-mentioned technical solutions, it is preferable that first antenna mould group is 5G antenna；And/or second antenna modules be LTE days
Line.
In the technical scheme, on the basis of existing LTE antenna, it is provided with 5G antenna in the side of substrate, is solved
Under 5G communication network, multi-antenna-unit design problem in antenna system guarantees the integral radiation performance of antenna system, with
Meet the requirement of upcoming 5G communication era.
In any of the above-described technical solution, it is preferable that further include: floor section, part cover substrate, not by floor on substrate
The part of portion's covering forms antenna headroom area, and first antenna mould group and/or the second antenna modules are located in antenna headroom area.
In the technical scheme, at least one of first antenna mould group and the second antenna modules are arranged in antenna headroom
In area, to realize the isolation between mutiple antennas mould group, the coupling phenomenon between each antenna modules is avoided, to improve antenna
The integral radiation performance of system.
In any of the above-described technical solution, it is preferable that the first side be it is multiple, at the position that each first side is corresponded on substrate
It is provided with first antenna mould group；And/or second side be it is multiple, correspond to and be provided at the position on each second side second day on substrate
Line mould group.
In the technical scheme, first while and second while be multiple, and first is arranged at the position on each first side
Antenna modules, at the position on each second side be arranged the second antenna modules, enable antenna system transmitting terminal or receiving end
More signal space streams are enough received, channel capacity can be significantly improved.
In any of the above-described technical solution, it is preferable that first antenna mould group includes the mutiple antennas positioned at substrate the same side
Unit, two neighboring antenna element are connected by decoupling assembly；And/or antenna element is monopole antenna structure.
In the technical scheme, multiple antenna elements positioned at substrate the same side constitute first antenna mould group, to meet
The demand of more antenna elements is used under 5G communication network in antenna system, so that transmitting terminal or receiving end receive more letters
Number spatial flow, can significantly improve channel capacity.In addition, decoupling assembly is able to solve because the coupling between antenna element will make
Obtain the problem of radiation efficiency between antenna reduces.
In any of the above-described technical solution, it is preferable that decoupling assembly includes: neutralization line, and two neighboring antenna element passes through
Line is neutralized to be connected.
In the technical scheme, two neighboring antenna element is using line connection is neutralized, be equivalent to two antenna elements it
Between the new mutual coupling that is added to, the isolation between two antenna elements adjustable in this way, so as to solve because of antenna list
The problem of coupling between member will make the radiation efficiency between antenna reduce realizes the isolation between mutiple antennas unit,
Improve the integral radiation performance of antenna system.
In any of the above-described technical solution, it is preferable that decoupling assembly further include: lamped element, setting is in and on line.
In the technical scheme, two neighboring antenna element is connected using line is neutralized, and setting lump member in and on line
Part, can further increase the controllability of isolation between two antenna elements, and the better isolation of optimization further mentions
The integral radiation performance of high antenna system.
In any of the above-described technical solution, it is preferable that lamped element is capacitor and/or inductance.
In the technical scheme, lamped element is at least one of capacitor and inductance, is solved because between antenna element
The problem of coupling will make the radiation efficiency between antenna reduce, to realize the isolation between mutiple antennas unit.
In any of the above-described technical solution, it is preferable that the distance between two neighboring antenna element is identical or different.
In the technical scheme, the position for the first side of substrate being arranged according to identical distance is spaced in mutiple antennas unit
Place is set, the coupling between two neighboring antenna element can be made same or similar, when being decoupled, convenient for using same specification
Decoupling assembly, thus promoted production installation convenience, reduce error rate, reduce production cost；By mutiple antennas unit it
Between be set to different distances, the distance between each antenna element can be suitably adjusted according to the size in space, with root
Suitable decoupling assembly, or even the desirable decoupling assembly that disappears are selected according to the coupling power between two neighboring antenna element, is being guaranteed
In the case where the integral radiation performance of antenna system, component is reduced, simplifies structure, reduces production cost.
The technical solution of the utility model second aspect provides a kind of electronic equipment, including such as the utility model first party
The antenna system that any technical solution provides in face.
In the technical scheme, electronic equipment uses the antenna system of the utility model first aspect, and which solve in 5G
Under communication network, multi-antenna-unit design problem in antenna system, in addition, electronic equipment also has appointing for above-mentioned antenna system
One technical effect, details are not described herein.
Electronic equipment can be mobile phone or tablet computer, and certainly, electronic equipment is not limited thereto, and is also applied for other shiftings
Dynamic terminal, will not enumerate herein, since these technical solutions can be realized the purpose of this utility model, and without de-
Design philosophy and objective from the utility model, thus should be within the protection scope of the present utility model.
The additional aspect and advantage of the utility model will become obviously in following description section, or practical new by this
The practice of type is recognized.
Detailed description of the invention
Fig. 1 shows the structural schematic diagram of one embodiment antenna system according to the present utility model；
Fig. 2 shows the structural schematic diagrams of the antenna system of another embodiment according to the present utility model.
Corresponding relationship in Fig. 1 and Fig. 2 between appended drawing reference and component names are as follows:
10 substrates, 102 first sides, 104 second sides, 20 floor section, 30 first antenna mould groups, 302 first antenna units,
304 second antenna elements, 306 third antenna units, 308 the 4th antenna elements, 40 second antenna modules, 50 antenna headroom areas,
502 first empty regions, 504 second empty regions, in 60 and line, 70 lamped elements.
Specific embodiment
In order to be more clearly understood that the above objects, features, and advantages of the utility model, with reference to the accompanying drawing and have
The utility model is further described in detail in body embodiment.It should be noted that in the absence of conflict, this Shen
The feature in embodiment and embodiment please can be combined with each other.
Many details are explained in the following description in order to fully understand the utility model, still, this is practical
Novel to be implemented using other than the one described here other modes, therefore, the protection scope of the utility model is simultaneously
It is not limited to the limitation of following public specific embodiment.
It is carried out below with reference to antenna system and electronic equipment of the Fig. 1 and Fig. 2 to embodiment according to the present utility model specific
Explanation.
As shown in Figure 1, the antenna system of one embodiment according to the present utility model, comprising: substrate 10；First antenna mould
Group 30, installation is on the substrate 10；Second antenna modules 40, installation is on the substrate 10；Wherein, substrate 10 have the first side 102 with
And with first at 102 adjacent second 104, first antenna mould group 30 is located on substrate 10 at the position on corresponding first side 102,
Second antenna modules 40 are located on substrate 10 at the position on corresponding second side 104.
In this embodiment, by the way that two antenna modules to be respectively set to the position on two adjacent on the substrate 10 sides
Place can efficiently use the space of 10 side of substrate compared to the scheme being arranged on two opposite on the substrate 10 sides, improve
Space utilization rate, and then reduce the occupied space of antenna system；Meanwhile, it is capable to which two antenna modules are isolated, improve
The integral radiation performance of antenna system.
Further, first antenna mould group 30 is 5G antenna；Second antenna modules 40 are LTE antenna.
In this embodiment, on the basis of existing LTE antenna, it is provided with 5G antenna in the side of substrate 10, is solved
Under 5G communication network, multi-antenna-unit design problem in antenna system guarantees the integral radiation performance of antenna system, with
Meet the requirement of upcoming 5G communication era.
In another embodiment of the utility model, further includes: floor section 20, part covers substrate 10, on substrate 10
The part not covered by floor section 20 forms antenna headroom area, and first antenna mould group 30 and/or the second antenna modules 40 are located at day
In line clearance zone.
In this embodiment, at least one of first antenna mould group 30 and the second antenna modules 40 are arranged net in antenna
In dead zone, to realize the isolation between mutiple antennas mould group, the coupling phenomenon between each antenna modules is avoided, to improve day
The integral radiation performance of linear system system.
In the present embodiment, for the ease of the isolation of first antenna mould group 30 and the second antenna modules 40, on substrate 10 not
By the first empty regions that the antenna headroom area that the part that floor section 20 covers is formed includes at the position on the first side 102
502 and the second empty regions 504 at the position on the second side 104, and by first antenna mould group 30 and the second antenna modules
40 are separately positioned in above-mentioned two empty regions, to realize the isolation between two neighboring antenna modules, avoid the occurrence of coupling
Close phenomenon.
As shown in Fig. 2, in another embodiment of the utility model, the first side 102 be it is multiple, it is corresponding every on substrate 10
First antenna mould group 30 is provided at the position on a first side 102.
Further, the second side 104 is multiple, corresponds on substrate 10 and is provided with second at the position on each second side 104
Antenna modules 40.
In this embodiment, first 104 is multiple at 102 and second, and is set at the position on each first side 102
First antenna mould group 30 is set, the second antenna modules 40 are set at the position on each second side 104, so that the transmitting of antenna system
End or receiving end can receive more signal space streams, can significantly improve channel capacity.
It is understood that first 104 when being multiple, encloses the substrate 10 for setting out polygon at 102 and second, such as four
The substrate 10 of side shape, first at 102 and second 104 is two, and two the first sides 102 are oppositely arranged, two the second sides 104
It is oppositely arranged, so that first antenna mould group 30 and the second antenna modules 40 are successively spaced setting along the circumferential direction of substrate 10.
In any of the above-described embodiment, it is preferable that first antenna mould group 30 includes positioned at multiple days of 10 the same side of substrate
Line unit, two neighboring antenna element are connected by decoupling assembly.
In this embodiment, multiple antenna elements positioned at 10 the same side of substrate constitute first antenna mould group 30, to meet
More antenna elements are used in antenna system under 5G communication network, so that transmitting terminal or receiving end receive more signals skies
Between flow, channel capacity can be significantly improved.In addition, decoupling assembly is able to solve because the coupling between antenna element will make day
The problem of radiation efficiency between line reduces.
Specifically, decoupling assembly includes but is not limited to following technical scheme:
Embodiment 1 (as depicted in figs. 1 and 2)
Line 60 is neutralized, two neighboring antenna element is connected by neutralizing line 60.
In this embodiment, two neighboring antenna element is connected using line 60 is neutralized, be equivalent to two antenna elements it
Between the new mutual coupling that is added to, the isolation between two antenna elements adjustable in this way, so as to solve because of antenna list
The problem of coupling between member will make the radiation efficiency between antenna reduce realizes the isolation between mutiple antennas unit,
Improve the integral radiation performance of antenna system.
Embodiment 2 (as depicted in figs. 1 and 2)
Lamped element 70 is provided in connecting two neighboring antenna element and on line 60, when antenna element is multiple,
Line 60 is neutralized also to be multiple, lamped element 70 can be arranged in lamped element 70 according to the actual situation at least one and on line 60.
In this embodiment, two neighboring antenna element is connected using line 60 is neutralized, and in and lump is arranged on line 60
Element 70, so that the controllability of isolation between two antenna elements is further increased, the better isolation of optimization, preferably
Ground, lamped element are set to the middle position for neutralizing line.
To further provide for improving the integral radiation performance of antenna system, the lamped element 70 being arranged in and on line 60,
Lamped element 70 can be for inductively or capacitively or the resonance circuit of capacitor and inductance composition, but the utility model be not limited to
This, any equivalent circuit.
In some embodiments, the distance between two neighboring antenna element is identical.
In this embodiment, the first side 102 for substrate 10 being arranged according to identical distance is spaced in mutiple antennas unit
Position at, the coupling between two neighboring antenna element can be made same or similar, when being decoupled, convenient for using same
The decoupling assembly of specification reduces error rate to promote the convenience of production installation, reduces production cost.
As depicted in figs. 1 and 2, in other embodiments of the utility model, between two neighboring antenna element away from
From difference.
In this embodiment, it will be set to different distances between mutiple antennas unit, it can be according to the big of space
It is small suitably to adjust the distance between each antenna element, it is suitable to be selected according to the coupling power between two neighboring antenna element
Decoupling assembly, or even the desirable decoupling assembly that disappears reduces component in the case where guaranteeing the integral radiation performance of antenna system,
Simplify structure, reduces production cost.
Specifically, when first antenna mould group 30 is four antenna elements for being located at 10 the same side of substrate, i.e. first antenna list
First 302, second antenna element 304, third antenna unit 306 and the 4th antenna element 308, wherein first antenna unit 302 with
The distance between second antenna element 304 less than the distance between the second antenna element 304 and third antenna unit 306, and
It connects and is arranged inductively or capacitively on the neutralization line 60 of the second antenna element 304 and third antenna unit 306, to solve because of antenna
The problem of coupling between unit will make the radiation efficiency between antenna reduce.
The electronic equipment of one embodiment according to the present utility model, including as any of the above-described embodiment of the utility model mentions
The antenna system of confession.
In this embodiment, electronic equipment the utility model first aspect which solve under 5G communication network, antenna
Multi-antenna-unit design problem in system, in addition, electronic equipment also has any technical effect of above-mentioned antenna system, herein
It repeats no more.
Electronic equipment can be the mobile terminals such as mobile phone or tablet computer, and certainly, electronic equipment is not limited thereto, and is also fitted
For other electronic equipments, will not enumerate herein, since these technical solutions can be realized the purpose of this utility model,
And without being detached from the design philosophy and objective of the utility model, thus should be within the protection scope of the present utility model.
It is noted that further include other elements in the terminal body of the application, for example, processor, battery module,
Wireless communication module, multi-media module, touch panel module, audio-frequency module, interface module and memory module etc..
According to the antenna system of the application specific embodiment, applied to the 5G intelligence hand with multiaerial system
Machine is solved the problems, such as in the decoupling in narrow mobile phone space between the antenna element of 5G antenna system.
As shown in Fig. 2, antenna system includes first antenna mould group 30 (eight 5G antenna elements) and the second antenna modules 40
(four LTE antenna components), wherein LTE antenna component is evenly distributed on two opposite the second sides 104, i.e., and each second
It is each on side 104 that there are two LTE antenna components；5G antenna element is on two opposite the first sides 102, i.e., each first side
Each four 5G antenna elements on 102, wherein first antenna unit 302 and the second antenna element 304 are symmetrically placed, third antenna list
Member 306 and the 4th antenna element 308 are symmetrically placed.
LTE antenna unit is 2G/3G/4G antenna, and groundwork frequency range is 698~960/1710~2690MHz；5G days
Line unit mainly works in 3400~3800MHz, and 5G antenna element is monopole antenna structure, is set to antenna headroom area 50
In.
It is decoupled as a whole positioned at the first antenna mould group 30 (being 5G antenna element) on same first side 102
Radiance is improved, specifically, between first antenna unit 302 and the second antenna element 304, third antenna unit 306 and the
Between four antenna elements 308, between the second antenna element 304 and third antenna unit 306, it is all made of neutralization line 60 and is connected, into
One step, lamped element 70 can be loaded among the neutralization line 60 between the second antenna element 304 and third antenna unit 306
(inductance or capacity cell).
Further, the distance between first antenna unit 302 and the second antenna element 304 are less than the second antenna element
The distance between 304 and third antenna unit 306；First radiation of first antenna unit 302 and the second antenna element 304 composition
Group and the second radiation group that third antenna unit 306 and the 4th antenna element 308 form are symmetrical；First radiation group and second
By being connected in third with line 60 between radiation group.
The technical solution of the utility model is had been described in detail above with reference to the accompanying drawings, the utility model provides a kind of aerial system
System and electronic equipment, by being separately positioned on two antenna modules at the position on two sides adjacent on substrate, compared to setting
The scheme on opposite two sides on substrate is set, the space of substrate side can be efficiently used, improves space utilization rate, in turn
Reduce the occupied space of antenna system；Meanwhile, it is capable to which two antenna modules are isolated, the whole spoke of antenna system is improved
Penetrate performance.
In the present invention, term " first ", " second ", " third " are only used for the purpose of description, and should not be understood as
Indication or suggestion relative importance；Term " multiple " then refers to two or more, unless otherwise restricted clearly.Term " peace
Dress ", " connected ", " connection ", the terms such as " fixation " shall be understood in a broad sense, can also be with for example, " connection " may be a fixed connection
It is to be detachably connected, or be integrally connected；" connected " can be directly connected, can also be indirectly connected through an intermediary.It is right
For those skilled in the art, can understand as the case may be above-mentioned term in the present invention specifically contain
Justice.
In the description of the utility model, it is to be understood that term " on ", "lower", "left", "right", "front", "rear" etc. refer to
The orientation or positional relationship shown be based on the orientation or positional relationship shown in the drawings, be merely for convenience of description the utility model and
Simplify description, rather than the device or unit of indication or suggestion meaning there must be specific direction, with specific orientation construction
And operation, it is thus impossible to be construed as a limitation of the present invention.
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Mean that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least the one of the utility model
In a embodiment or example.In the present specification, schematic expression of the above terms be not necessarily referring to it is identical implementation or
Example.Moreover, the particular features, structures, materials, or characteristics of description can be in any one or more of the embodiments or examples
It can be combined in any suitable manner.
The above is only the preferred embodiments of the utility model, are not intended to limit the utility model, for this field
Technical staff for, various modifications and changes may be made to the present invention.Within the spirit and principle of the utility model,
Any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of antenna system is used for electronic equipment characterized by comprising
Substrate；
First antenna mould group, installation is on the substrate；
Second antenna modules, installation is on the substrate；
Wherein, the substrate has the first second side adjacent while described first, and the first antenna mould group is located at
At the position for corresponding to first side on the substrate, second antenna modules, which are located on the substrate, corresponds to second side
Position at.
2. antenna system according to claim 1, which is characterized in that the first antenna mould group is 5G antenna；And/or
Second antenna modules are LTE antenna.
3. antenna system according to claim 1 or 2, which is characterized in that further include:
Floor section partially covers the substrate, and the part not covered by the floor section on the substrate forms antenna headroom area,
The first antenna mould group and/or the second antenna modules are located in the antenna headroom area.
4. antenna system according to claim 3, which is characterized in that first side is multiple, correspondence on the substrate
The first antenna mould group is provided at the position on each first side；And/or
Second side be it is multiple, corresponded on the substrate and be provided with the second antenna mould at the position on each second side
Group.
5. antenna system according to claim 1 or 2, which is characterized in that the first antenna mould group includes positioned at described
The mutiple antennas unit of substrate the same side, the two neighboring antenna element are connected by decoupling assembly；And/or
The antenna element is monopole antenna structure.
6. antenna system according to claim 5, which is characterized in that the decoupling assembly includes:
Line is neutralized, the two neighboring antenna element is connected by the neutralization line.
7. antenna system according to claim 6, which is characterized in that the decoupling assembly further include:
Lamped element, setting is in described and on line.
8. antenna system according to claim 7, which is characterized in that the lamped element is capacitor and/or inductance.
9. antenna system according to claim 6, which is characterized in that the distance between two neighboring described antenna element phase
It is same or different.
10. a kind of electronic equipment, which is characterized in that including antenna system as claimed in any one of claims 1-9 wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822182430.6U CN209088073U (en) | 2018-12-25 | 2018-12-25 | Antenna system and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822182430.6U CN209088073U (en) | 2018-12-25 | 2018-12-25 | Antenna system and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209088073U true CN209088073U (en) | 2019-07-09 |
Family
ID=67127271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822182430.6U Active CN209088073U (en) | 2018-12-25 | 2018-12-25 | Antenna system and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209088073U (en) |
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2018
- 2018-12-25 CN CN201822182430.6U patent/CN209088073U/en active Active
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