CN104577330B - Multi-input/output antenna - Google Patents
Multi-input/output antenna Download PDFInfo
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- CN104577330B CN104577330B CN201310467470.4A CN201310467470A CN104577330B CN 104577330 B CN104577330 B CN 104577330B CN 201310467470 A CN201310467470 A CN 201310467470A CN 104577330 B CN104577330 B CN 104577330B
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- antenna
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- input
- vertical portion
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- 239000000758 substrate Substances 0.000 claims abstract description 49
- 238000002955 isolation Methods 0.000 claims abstract description 32
- 238000003780 insertion Methods 0.000 claims description 7
- 230000037431 insertion Effects 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims 1
- 239000002184 metal Substances 0.000 abstract description 9
- 238000004891 communication Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 7
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 206010057855 Hypotelorism of orbit Diseases 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Abstract
A kind of mimo antenna, is arranged on substrate, and the substrate includes the ground plane being printed on substrate, and the mimo antenna includes first antenna, the second antenna, bridge part.The bridge part is printed on the substrate, and is connected between the first antenna and the second antenna, wherein being provided with isolation channel between the ground plane and the bridge part so that the ground plane is not attached to the bridge part.The present invention is by being fabricated to 3 D antenna structure that metal combined with microstrip line by the first antenna and the second antenna and first antenna being connected with the second antenna by bridge part, and isolation channel is set between bridge part and ground plane, first antenna and the second isolation between antennae, efficiency are improved, so as to improve the communication quality of mimo antenna.
Description
Technical field
The present invention relates to antenna, more particularly to a kind of multi-input/output antenna.
Background technology
With the popularization of advancing by leaps and bounds for wireless communication technology, especially Web TV（Interactive
Personality TV, IPTV）So that TV has access to broadband network, and the Web TV of the type includes radio communication mold
Block.
Above-mentioned Web TV, which generally requires, is designed to relatively thin thickness, multiple-input and multiple-output (Multiple Input
Multiple Output, MIMO) antenna is one of its indispensable component, due to its thinner thickness, the liquid crystal metal of television internal
The hypotelorism of panel and mimo antenna, and then mimo antenna performance is had an impact, such as：The isolation variation of mimo antenna,
Efficiency step-down, gain become big.Therefore, how to design a kind of mimo antenna to overcome above mentioned problem be then a major challenge, also into
The target that need to improve for current industry.
The content of the invention
In view of this, it is necessary to provide a kind of mimo antenna, the liquid crystal metal decking that can reduce television internal is linear to day
The influence of energy simultaneously has excellent radiance.
An embodiment of the present invention provides a kind of mimo antenna, is arranged on substrate, and the substrate includes being printed in substrate
The ground plane on surface.The mimo antenna includes first antenna, the second antenna and bridge part.The bridge part is printed in the base
On plate, and it is connected between the first antenna and the second antenna.Wherein set between the ground plane and the bridge part
There is isolation channel so that the ground plane is not attached to the bridge part.
Preferably, the first antenna and second antenna are three-dimensional ironware antennas.
Preferably, the first antenna is symmetricly set in the both ends of the bridge part socket part with second center of antenna.
Preferably, the first antenna includes the first irradiation unit and the first feeding portion.First irradiation unit includes first
Vertical portion, the second vertical portion and the first main body.First vertical portion extends downwardly from an ending vertical of first main body
And with the substrate connection, the tie point of first vertical portion and the substrate be the first fixed part, second vertical portion
Extend downwardly from another ending vertical of first main body and be connected with first feeding portion, second vertical portion and institute
The tie point for stating the first feeding portion is the first load point.Second antenna includes the second irradiation unit and the second feeding portion.It is described
Second irradiation unit includes the 3rd vertical portion, the 4th vertical portion and the second main body.3rd vertical portion is from second main body
One ending vertical is extended downwardly and fixed with the substrate connection, the 3rd vertical portion and the tie point of the substrate for second
Portion, the 4th vertical portion extend downwardly from another ending vertical of second main body and are connected with second feeding portion,
4th vertical portion and the tie point of second feeding portion are the second load point.
Preferably, first fixed part and second fixed part are respectively positioned at relative two edges of the substrate.
Preferably, the bridge part includes rectangular portion, first connecting portion and second connecting portion.Described first connecting portion one end
The rectangular portion is connected to, the other end is connected to the first load point of the first antenna.Second connecting portion one end connection
In the rectangular portion, the other end is connected to the second load point of the second antenna.
Preferably, the first connecting portion, second connecting portion are L-type structure.
Preferably, the both ends of the isolation channel extend along the direction of first main body, second main body respectively, described
The length of isolation channel is less than the length of the bridge part.
Preferably, the isolation channel is the list structure for being located at the substrate.
Preferably, the length of the bridge part is equal to the half of the wavelength for the electromagnetic wave that antenna transmitting receives.
The present invention by the first antenna and the second antenna by being fabricated to the 3 D antenna structure that metal combined with microstrip line
And first antenna is connected with the second antenna by bridge part, and isolation channel is set between bridge part and ground plane, improves the
One antenna and the second isolation between antennae, efficiency, so as to improve the communication quality of mimo antenna.
Brief description of the drawings
Fig. 1 is the schematic perspective view in the embodiment of mimo antenna one of the present invention.
Fig. 2 is the vertical view scale diagrams in the embodiment of mimo antenna one of the present invention.
Fig. 3 is the backsight scale diagrams in the embodiment of the first irradiation unit one of first antenna of the present invention.
Fig. 4 is the schematic diagram of isolation between first antenna and the second antenna in an embodiment of the present invention.
Main element symbol description
Mimo antenna 100
Substrate 10
Ground plane 20
First antenna 30
First irradiation unit 31
First main body 310
First disk 310a
First vertical portion 312
First fixed part 314
Second vertical portion 316
First bar shaped portion 316a
First insertion section 316b
First load point 318
First feeding portion 32
Second antenna 40
Second irradiation unit 41
Second main body 410
Second disk 410a
3rd vertical portion 412
Second fixed part 414
4th vertical portion 416
Second bar shaped portion 416a
Second insertion section 416b
Second load point 418
Second feeding portion 42
Bridge part 50
First connecting portion 502
Rectangular portion 504
Second connecting portion 506
Isolation channel 60
Following embodiment will combine above-mentioned accompanying drawing and further illustrate the present invention.
Embodiment
Fig. 1 is the schematic perspective view of mimo antenna 100 in an embodiment of the present invention.In the present embodiment, MIMO days
Line 100 is arranged on substrate 10, and substrate 10 is provided with ground plane 20, and ground plane 20 is the metal level being printed on substrate 10.
Mimo antenna 100 includes the first antenna 30 for transceiving electromagnetic ripple, the second antenna 40, bridge part for transceiving electromagnetic ripple
50.Wherein, isolation channel 60 is additionally provided between ground plane 20 and bridge part 50 so that ground plane 20 and bridge part 50 not phase
Even.
First antenna 30 includes the first irradiation unit 31 and the first feeding portion 32.First feeding portion 32 is to be arranged on substrate 10
Microstrip line, for feed-in electromagnetic wave signal.First irradiation unit 31 is metal ironware structure, for radiated electromagnetic wave signal.
In the present embodiment, the first irradiation unit 31 includes the first main body 310, the first vertical portion 312, the first fixed part
314 and second vertical portion 316.First main body 310 is the radiating principal of the first irradiation unit 31, and the is additionally provided with the first main body 310
One disk 310a, to facilitate the first irradiation unit of Placement 31 on substrate 10.First fixed part 314 is used for the first radiation
Portion 31 is fixed on substrate 10.First vertical portion 312 extends downwardly from an ending vertical of the first main body 310, and with substrate 10
It is connected on the first fixed part 314.Second vertical portion 316 extends downwardly from another ending vertical of the first main body 310 and with first
Feeding portion 32 connects, and the tie point of the second vertical portion 316 and the first feeding portion 32 is the first load point 318, the first load point 318
The electromagnetic wave signal of the feed-in of first feeding portion 32 is transmitted to the first irradiation unit 31.
In the present embodiment, the first main body 310, the first vertical portion 312 and the second vertical portion 316 form a n shape or lacked
Mouth rectangular shape.First main body 310 is wider than its elsewhere at the first disk 310a, and the first disk 310a is circular configuration.The
One vertical portion 312 is in strip.First fixed part 314 is L-shaped.Second vertical portion 316 includes the first bar shaped portion 316a and the
One insertion section 316b.
Second antenna 40 includes the second irradiation unit 41 and the second feeding portion 42.Second feeding portion 42 is to be arranged on substrate 10
Microstrip line, for feed-in electromagnetic wave signal.Second irradiation unit 41 is metal ironware structure, for radiated electromagnetic wave signal.
In the present embodiment, the second irradiation unit 41 includes the second main body 410, the 3rd vertical portion 412, the second fixed part
414 and the 4th vertical portion 416.Second main body 410 is the radiating principal of the second irradiation unit 41, also has second in the second main body 410
Disk 410a, to facilitate the second irradiation unit of Placement 41 on substrate 10.Second fixed part 414 is used for the second irradiation unit
41 are fixed on substrate 10.3rd vertical portion 412 extends downwardly from an ending vertical of the second main body 410 and connected with substrate 10
In the second fixed part 414.4th vertical portion 416 extended downwardly from another ending vertical of the second main body 410 and with the second feed-in
Portion 42 connects, and the tie point of the 4th vertical portion 416 and the second feeding portion 42 is the second load point 418, and the second load point 418 is by
The electromagnetic wave signal of the feed-in of two feeding portion 42 is transmitted to the second irradiation unit 41.
In the present embodiment, the second main body 410, the 3rd vertical portion 412 and the 4th vertical portion 416 form a n shape or lacked
Mouth rectangular shape.Second main body 410 is wider than its elsewhere at the second disk 410a, and the second disk 410a is circular configuration.The
Three vertical portions 412 are in strip.Second fixed part 414 is L-shaped.4th vertical portion 416 includes the second bar shaped portion 416a and the
Two insertion section 416b.
In the present embodiment, the paster of the first fixed part 314 is welded in the front of substrate 10, and the first insertion section 316b is passed through
Substrate 10 and the reverse side for being welded in substrate 10, the ends of the first bar shaped portion 316a mono- are connected with the first main body 310, the first bar shaped portion
316a another end is connected with the first load point 318.The paster of second fixed part 414 is welded in the front of substrate 10, and second inserts
Entering portion 416b through substrate 10 and be welded in the reverse side of substrate 10, the ends of the second bar shaped portion 416a mono- are connected with the second main body 410,
Second bar shaped portion 416a another end is connected with the second load point 418.In other embodiments, can also be according to different need
Ask and change different welding manners.
In the present embodiment, the first feeding portion 32 and the second feeding portion 42 are rectangular configuration.In the other of the present invention
In embodiment, the first feeding portion 32 and the structure of the second feeding portion 42 or other geometries.
In the present embodiment, the first irradiation unit 31 is identical with the structure of the second irradiation unit 41, the first irradiation unit 31 and second
Irradiation unit 41 can share one set of die, and the first irradiation unit 31 and the center symmetric setting of the second irradiation unit 41 are in the two of bridge part 50
End, namely the center symmetric setting of 30 and second antenna of first antenna 40 is in the both ends of bridge part 50.
Bridge part 50 is used to connect the antenna 40 of first antenna 30 and second, and bridge part 50 connects including rectangular portion 504, first
Portion 502 and second connecting portion 506.In the present embodiment, bridge part 50 is printed on substrate 10.In the present embodiment,
One connecting portion 502 and second connecting portion 506 are L-type structure, and the one end of first connecting portion 502 is connected to rectangular portion 504, the other end
It is connected to the second vertical portion 316 and the first load point 318 of first antenna 30.The one end of second connecting portion 506 is connected to rectangular portion
504, the other end is connected to the 4th vertical portion 416 and the second load point 418 of the second antenna 40.In the present embodiment, bridge
The length in portion 50 is equal to the outward flange of first connecting portion 502 to the outer peripheral air line distance of second connecting portion 506, bridge part 50
Length be preferably the half of the wavelength of electromagnetic wave that mimo antenna 100 is launched or received, the antenna 40 of first antenna 30 and second
Linked together by bridge part 50, increase the isolation between the antenna 40 of first antenna 30 and second, reduce due in TV
The liquid crystal metal decking and the hypotelorism of mimo antenna 100 in portion have an impact to antenna performance so that the gain of mimo antenna 100
It is more stable, also improve the efficiency of mimo antenna 100.
Isolation channel 60 is arranged between ground plane 20 and bridge part 50, so that ground plane 20 and bridge part 50 not phase
Even, the list structure of the straight line specially between ground plane 20 and bridge part 50.The both ends of isolation channel 60 are respectively along first day
The direction of first main body 310 of line 30 and the second main body 410 of the second antenna 40 extends.In the present embodiment, isolation channel 60
Length be less than bridge part 50 length.Isolation channel 60 avoids the edge current of ground plane 20 to the antenna of first antenna 30 and second
40 interference, increase the isolation between the antenna 40 of first antenna 30 and second, and then improve the communication product of mimo antenna 100
Matter.
It should be noted that in order to further increase the isolation of the antenna 40 of first antenna 30 and second, first antenna 30
The both ends of substrate 10, the first fixed part 314 of first antenna 30 and the of the second antenna 40 are respectively arranged at the second antenna 40
Two fixed parts 414 are located at two relative edges of substrate 10, so add the physics of the antenna 40 of first antenna 30 and second away from
From the isolation of the raising antenna 40 of first antenna 30 and second.
Fig. 2 is the vertical view scale diagrams of mimo antenna 100 in an embodiment of the present invention.In the present embodiment, base
The width of plate 10 is 40.0 millimeters, and the first feeding portion 32 is identical with the width of the second feeding portion 42, is 1.0 millimeters.First spoke
The length for penetrating portion 31 is 9.7 millimeters, and width is 4.5 millimeters, and the width of the first main body 310 is 2.0 millimeters, the first disk 310a's
A diameter of 3.0 millimeters, each several part size of the second irradiation unit 41 is identical with each several part size of the first irradiation unit 31.Bridge part 50
Length be 19.7 millimeters, the length of isolation channel 60 and width are respectively 14.3 millimeters, 0.8 millimeter.The first of first antenna 30
The spacing of 3rd vertical portion 412 of the antenna 40 of vertical portion 312 and second is 37.4 millimeters.However, the present invention does not limit above chi
Very little, in other embodiments of the invention, above-mentioned each part can also have other sizes.
Fig. 3 is the backsight scale diagrams of the first irradiation unit 31 of first antenna 30 in an embodiment of the present invention.At this
In embodiment, because the first irradiation unit 31 of first antenna 30 and the structure of the second irradiation unit 41 of the second antenna 40 are identical, therefore
This only provides the scale diagrams of the first irradiation unit 31 of first antenna 30, and following only with the first irradiation unit of first antenna 30
31 size is described in detail.
In the present embodiment, the length of the first main body 310 of the first irradiation unit 31 is 9.7 millimeters, the first vertical portion 312
Length be 4.0 millimeters, the length of the second vertical portion 316 is 5.0 millimeters, and the width of the first fixed part 314 is 2.5 millimeters.So
And the present invention does not limit dimensions above, in other embodiments of the invention, the first irradiation unit 31 can also have other sizes.
Fig. 4 is the schematic diagram of isolation between the antenna 40 of first antenna 30 and second in an embodiment of the present invention.Wherein,
The frequency range that X-axis works for mimo antenna 100, Y-axis isolation between the antenna 40 of first antenna 30 and second.It can be seen that
When mimo antenna 100 works in tri- frequencies of 2.4GHz, 2.45GHz and 2.5GHz, the antenna 40 of first antenna 30 and second it
Between isolation be respectively -14.42dB, -16.57dB and -10.36dB, be respectively less than -10dB, be also respectively provided with preferable isolation.
The present invention by the antenna 40 of first antenna 30 and second by being fabricated to the three-dimensional antenna that metal combined with microstrip line
First antenna 30 is simultaneously connected by structure by bridge part 50 with the second antenna 40, and is set between bridge part 50 and ground plane 20
Isolation channel 60, improve the antenna 40 of first antenna 30 and second between isolation, efficiency, so as to improve the communication product of mimo antenna
Matter.
Claims (15)
1. a kind of multi-input/output antenna, is arranged on substrate, the substrate includes the ground plane for being printed in substrate surface, institute
Stating multi-input/output antenna includes first antenna and the second antenna, it is characterised in that the multi-input/output antenna also wraps
Bridge part is included, the bridge part is printed on the substrate, and is connected between the first antenna and the second antenna；
Wherein, it is provided with isolation channel between the ground plane and the bridge part so that the ground plane and the bridge part
It is not attached to：
The bridge part includes：Rectangular portion；First connecting portion, one end are connected to the rectangular portion, and the other end is connected to described
First load point of one antenna；Second connecting portion, one end are connected to the rectangular portion, and the other end is connected to the second of the second antenna
Load point, the rectangular portion, first connecting portion and second connecting portion form the shape of falling a M structure.
2. multi-input/output antenna as claimed in claim 1, it is characterised in that the first antenna and second antenna
It is three-dimensional ironware antenna.
3. multi-input/output antenna as claimed in claim 1, it is characterised in that the first antenna and second antenna
Center symmetric setting is in the both ends of the bridge part.
4. multi-input/output antenna as claimed in claim 1, it is characterised in that the first antenna includes the first irradiation unit
And first feeding portion, first irradiation unit include the first vertical portion, the second vertical portion and the first main body, first vertical portion
Extended downwardly from an ending vertical of first main body and with the substrate connection, first vertical portion and the substrate
Tie point is the first fixed part, second vertical portion extended downwardly from another ending vertical of first main body and with it is described
First feeding portion connects, and second vertical portion and the tie point of first feeding portion are the first load point, first feedback
Enter portion to be arranged on the substrate；
Second antenna includes the second irradiation unit and the second feeding portion, and second irradiation unit includes the 3rd vertical portion, the 4th
Vertical portion and the second main body, the 3rd vertical portion extended downwardly from an ending vertical of second main body and with the substrate
The tie point of connection, the 3rd vertical portion and the substrate is the second fixed part, and the 4th vertical portion is led from described second
Another ending vertical of body is extended downwardly and is connected with second feeding portion, the 4th vertical portion and second feeding portion
Tie point be the second load point.
5. multi-input/output antenna as claimed in claim 4, it is characterised in that be additionally provided with the first circle in first main body
Disk, first main body is wider than the width of its elsewhere at first disk, and the second disk is additionally provided with second main body,
Second main body is wider than the width of its elsewhere at second disk.
6. multi-input/output antenna as claimed in claim 4, it is characterised in that first fixed part is solid with described second
Portion is determined respectively positioned at two relative edges of the substrate.
7. multi-input/output antenna as claimed in claim 4, it is characterised in that first fixed part, described second are consolidated
It is L-type structure to determine portion.
8. multi-input/output antenna as claimed in claim 4, it is characterised in that first vertical portion, the described 3rd erect
Straight portion is strip structure.
9. multi-input/output antenna as claimed in claim 4, it is characterised in that second vertical portion includes：
First bar shaped portion, one end are connected to the first main body, and the other end is connected to the first load point；
First insertion section, one end are connected to the first bar shaped portion and the first load point, and the other end is through substrate and to be welded in substrate anti-
Face；
4th vertical portion includes：
Second bar shaped portion, one end are connected to the second main body, and the other end is connected to the second load point；
Second insertion section, one end are connected to the second bar shaped portion and the second load point, and the other end is through substrate and to be welded in substrate anti-
Face.
10. multi-input/output antenna as claimed in claim 4, it is characterised in that first main body, described first vertical
Portion and second vertical portion form a n shape structure, second main body, the 3rd vertical portion and the 4th vertical portion
Form a n shape structure.
11. multi-input/output antenna as claimed in claim 4, it is characterised in that the both ends of the isolation channel are respectively along institute
The direction extension of the first main body, second main body is stated, the length of the isolation channel is less than the length of the bridge part.
12. multi-input/output antenna as claimed in claim 1, it is characterised in that the first connecting portion, second connecting portion
It is L-type structure.
13. multi-input/output antenna as claimed in claim 1, it is characterised in that the first connecting portion is connected to described
The width of first load point of the width of rectangular portion than being connected to the first antenna is wide, and the second connecting portion is connected to described
The width of second load point of the width of rectangular portion than being connected to second antenna is wide.
14. multi-input/output antenna as claimed in claim 1, it is characterised in that the isolation channel is to be located at the substrate
List structure.
15. multi-input/output antenna as claimed in claim 1, it is characterised in that the length of the bridge part is equal to described
The half of the wavelength for the electromagnetic wave that antenna transmitting receives.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310467470.4A CN104577330B (en) | 2013-10-09 | 2013-10-09 | Multi-input/output antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310467470.4A CN104577330B (en) | 2013-10-09 | 2013-10-09 | Multi-input/output antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104577330A CN104577330A (en) | 2015-04-29 |
| CN104577330B true CN104577330B (en) | 2018-02-13 |
Family
ID=53092867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310467470.4A Active CN104577330B (en) | 2013-10-09 | 2013-10-09 | Multi-input/output antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104577330B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6704169B2 (en) * | 2016-05-31 | 2020-06-03 | パナソニックＩｐマネジメント株式会社 | Dielectric substrate and antenna device |
| CN109861000A (en) * | 2019-03-01 | 2019-06-07 | 深圳市信维通信股份有限公司 | Compact 5G mimo antenna system and mobile terminal |
| TWI790824B (en) * | 2021-11-18 | 2023-01-21 | 和碩聯合科技股份有限公司 | Three-dimensional antenna module |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101615719A (en) * | 2008-06-27 | 2009-12-30 | 华硕电脑股份有限公司 | Antenna assembly |
| JP2011077608A (en) * | 2009-09-29 | 2011-04-14 | Alps Electric Co Ltd | Antenna device |
| CN102110881A (en) * | 2009-12-25 | 2011-06-29 | 鸿富锦精密工业（深圳）有限公司 | Multi-band antenna |
| CN102280696A (en) * | 2011-04-28 | 2011-12-14 | 上海交通大学 | Half-wave transmission decoupling small-space microstrip array antenna |
| CN102544705A (en) * | 2010-11-23 | 2012-07-04 | 株式会社Mobitech | MIMO antenna having plurality of isolation adjustment portions |
-
2013
- 2013-10-09 CN CN201310467470.4A patent/CN104577330B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101615719A (en) * | 2008-06-27 | 2009-12-30 | 华硕电脑股份有限公司 | Antenna assembly |
| JP2011077608A (en) * | 2009-09-29 | 2011-04-14 | Alps Electric Co Ltd | Antenna device |
| CN102110881A (en) * | 2009-12-25 | 2011-06-29 | 鸿富锦精密工业（深圳）有限公司 | Multi-band antenna |
| CN102544705A (en) * | 2010-11-23 | 2012-07-04 | 株式会社Mobitech | MIMO antenna having plurality of isolation adjustment portions |
| CN102280696A (en) * | 2011-04-28 | 2011-12-14 | 上海交通大学 | Half-wave transmission decoupling small-space microstrip array antenna |
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| Publication number | Publication date |
|---|---|
| CN104577330A (en) | 2015-04-29 |
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Denomination of invention: MIMO antenna Effective date of registration: 20210531 Granted publication date: 20180213 Pledgee: Weitang sub branch of Zhejiang Jiashan Rural Commercial Bank Co.,Ltd. Pledgor: Jiashan Weitang Asset Management Co.,Ltd. Registration number: Y2021980004130 |
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Denomination of invention: Multiple input multiple output antenna Effective date of registration: 20231127 Granted publication date: 20180213 Pledgee: Weitang sub branch of Zhejiang Jiashan Rural Commercial Bank Co.,Ltd. Pledgor: Jiashan Weitang Asset Management Co.,Ltd. Registration number: Y2023330002807 |
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