CN110165423A - Broadband miniature antenna - Google Patents
Broadband miniature antenna Download PDFInfo
- Publication number
- CN110165423A CN110165423A CN201910267298.5A CN201910267298A CN110165423A CN 110165423 A CN110165423 A CN 110165423A CN 201910267298 A CN201910267298 A CN 201910267298A CN 110165423 A CN110165423 A CN 110165423A
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- Prior art keywords
- feed
- ground level
- substrate
- radiant panel
- feed structure
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000000758 substrate Substances 0.000 claims abstract description 55
- 230000008859 change Effects 0.000 claims abstract description 19
- 230000005284 excitation Effects 0.000 claims description 16
- 238000005516 engineering process Methods 0.000 claims description 8
- 238000001465 metallisation Methods 0.000 claims description 8
- 238000002360 preparation method Methods 0.000 claims description 5
- 230000009977 dual effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 10
- 230000005404 monopole Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Waveguide Aerials (AREA)
- Details Of Aerials (AREA)
Abstract
The present invention relates to a kind of broadband miniature antennas, including radiating element, feed substrate and reflecting plate, the feed substrate to be set on the reflecting plate, and the radiating element is set on the feed substrate；It is provided with ground level and feed structure on the feed substrate, is isolated between the ground level and the feed structure, without electrical connection；The radiating element includes gradual change feed structure, radiant panel and short-circuit minor matters；The radiant panel is set on the feed substrate, and the radiant panel is electrically connected by the gradual change feed structure and the feed structure；The radiant panel is electrically connected by the short-circuit minor matters and the ground level.Antenna provided by the invention has the characteristics that broadband, miniaturization, low section, can satisfy the requirement of portable class and family's class product.
Description
Technical field
The present invention relates to wireless communication technology fields, more particularly, to a kind of broadband miniature antenna.
Background technique
Currently, portable class and family's class product gradually apply the function of wireless access, and in order to meet portable class and family
The miniaturization of front yard class product, precise treatment needs, the antenna being built in product needs to have miniaturization, broadband, low directionality
The characteristics of.The present invention provides a kind of antenna of broadband miniaturization to meet the above demand.
Summary of the invention
Present invention address that portable class and family's class product provide one for antenna miniaturization, wide band requirement
Kind broadband miniature antenna.
To realize the above goal of the invention, the technical solution adopted is that:
Broadband miniature antenna, including radiating element, feed substrate and reflecting plate, the feed substrate are set to described
On reflecting plate, the radiating element is set on the feed substrate；Ground level and feed knot are provided on the feed substrate
Structure is isolated between the ground level and the feed structure, without electrical connection；The radiating element includes gradual change feed knot
Structure, radiant panel and short-circuit minor matters；The radiant panel is set on the feed substrate, and the radiant panel is fed by the gradual change
Structure and the feed structure are electrically connected；The radiant panel is electrically connected by the short-circuit minor matters and the ground level.
In above scheme, the radiant panel of broadband miniature antenna provided by the invention is fed by the gradual change
What structure and the feed structure were electrically connected, the gradual change feed structure can effectively expand the impedance bandwidth of antenna, realize
The wideband of antenna designs.When the only described gradual change feed structure and the radiant panel, antenna is in high-frequency resonant.And the present invention mentions
The broadband miniature antenna of confession is additionally arranged the short-circuit minor matters, and make the radiant panel by the short-circuit minor matters with described
Plane electrical connection, can become short-circuit port (Low ESR shape for the open circuit port (high impedance status) of traditional monopole sub-antenna
State), current path is elongated, the resonance of low frequency point is introduced, to realize the wideband design of antenna.And the feed substrate is set to
On the reflecting plate, the radiant panel be set to it is described feed substrate on stepped construction, it can be achieved that antenna Miniaturization Design.
To sum up, antenna provided by the invention has the characteristics that broadband, miniaturization.
Preferably, the radiant panel is erected at the feed substrate by the gradual change feed structure and the short-circuit minor matters
On.The radiant panel is set up by the gradual change feed structure and the short-circuit minor matters, without other support members, is realized
Effective use to the radiating element component.
Preferably, the quantity of the short-circuit minor matters is two, and described two short circuit minor matters are symmetricly set on the radiant panel
Opposite two sides.Described two short circuit minor matters are symmetricly set on the opposite two sides of the radiant panel, it can be achieved that the radiant panel
Effective support so that the structure of antenna entirety is more compact.
Preferably, the radiant panel uses meander technology in preparation.Meander technology is by will similar monopole antenna
Vertical current becomes part of horizontal current distribution by way of folding.This technology can effectively realize that the low section of antenna is set
Meter.
It preferably, further include microstrip line, the feed structure is electrical by the microstrip line and the gradual change feed structure
Connection.
Preferably, the microstrip line is arranged on the feed substrate, and the microstrip line is isolated with the ground level, not into
Row electrical connection.
Further, as a preferred embodiment, the feed structure, the microstrip line are in the feed substrate
It is upper to use coplanar waveguide structure.Coplanar waveguide structure refers to the feed structure, microstrip line preparation in same plane
On, coplanar waveguide structure have the advantages that be easy production, convenient for be installed in parallel component and improve installation elements current densities.
Preferably, be provided with excitation port on the feed substrate, the excitation port is isolated with the ground level, not into
Row electrical connection；The excitation port and the feed structure are electrically connected.It is provided with the excitation port, can be incited somebody to action when in use
50 ohm coaxial cable levels are welded at this.
Preferably, the feed substrate is dual platen, and the ground level includes being separately positioned on the feed substrate first
First ground level and the second ground level in face, the second face, first ground level and second ground level and the feed are tied
Structure, the microstrip line are isolated between the excitation port, without electrical connection；First ground level and second ground
Plane and the short-circuit minor matters are electrically connected；The feed structure, the excitation port and the microstrip line are arranged in the feedback
First face of electric substrate.
Preferably, feed first face of substrate, first ground level on the second face, second ground level pass through
The metallization VIA being provided on the feed substrate is electrically connected.The data of the metallization VIA are when specifically used
It can be adjusted according to the actual situation, the metallization VIA is more, and earthing effect is better.
Preferably, the feed substrate is connect with the reflecting plate.
Further, as preferred embodiment, in the specific implementation, between the feed substrate and the reflecting plate
Can also vacantly it be arranged, between the two without connection.
Preferably, the feed substrate is connect by least 4 rivets with the reflecting plate.
Compared with prior art, the beneficial effects of the present invention are:
1. antenna provided by the invention has the characteristics that broadband, miniaturization, low section, portable class and family can satisfy
The requirement of class product.
2. the structure of antenna provided by the invention is simple, preparation process is simple, and what is be applied to is common in field
Device, whole cost are low.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of antenna.
Fig. 2 is radiating element, the structural schematic diagram for feeding substrate.
Fig. 3 is the schematic diagram of the input impedance of antenna.
The schematic diagram that Fig. 4 is that whether there is short circuit minor matters influence antenna reflection coefficient.
Fig. 5 is schematic diagram of the antenna height to reflective index impacts.
Fig. 6 is emulation 3D antenna pattern of the antenna in four different frequency ranges.
Fig. 7 is the simulated gain schematic diagram of antenna.
Specific embodiment
The attached figures are only used for illustrative purposes and cannot be understood as limitating the patent；
Below in conjunction with drawings and examples, the present invention is further elaborated.
Embodiment 1
As shown in Figure 1, 2, broadband miniature antenna provided in this embodiment includes radiating element 1, feed substrate 2 and anti-
Penetrate plate 3, the reflecting plate 3, the feed substrate 2 are laminated in order between the radiating element 1, and the feed substrate 2 passes through
At least 4 rivets are connect with the reflecting plate 3.Wherein ground level 21 and feed structure 22, institute are provided on the feed substrate 2
It states and is isolated between ground level 21 and the feed structure 22, without electrical connection.
In the present embodiment, the radiating element 1 includes gradual change feed structure 11, radiant panel 12 and short-circuit minor matters 13；It is described
Radiant panel 12 is set on the feed substrate 2, and the radiant panel 12 is tied by the gradual change feed structure 11 with the feed
Structure 22 is electrically connected；The radiant panel 12 is electrically connected by the short-circuit minor matters 13 with the ground level 21.
In the present embodiment, the radiant panel 12 uses meander technology in preparation.Meander technology passes through will similar monopole
The vertical current of antenna becomes part of horizontal current distribution by way of folding.This technology can effectively realize the low of antenna
Section Design.
In the present embodiment, the quantity for the short-circuit minor matters 13 that antenna includes is two, is symmetrically arranged at described
The two sides of radiant panel 12；The radiant panel 12 is erected at the feedback by the gradual change feed structure 11 and the short-circuit minor matters 13
On electric substrate 2.The radiant panel 12 is set up by the gradual change feed structure 11 and the short-circuit minor matters 13, without others
Support member realizes the effective use to 1 component of radiating element.
In a more specific embodiment, the quantity of the short-circuit minor matters 13 can be two or more, can be according to specific application
Scene setting.
Wherein, the reflecting plate 3 of the antenna of the present embodiment is aluminium sheet.In the present embodiment, size can be 100mm ×
100mm × 1.0mm, the feed substrate 2 are high frequency substrate F4B, and dielectric constant is 2.65, and thickness is that base is fed described in 1.0mm
2 size of plate is 50mm × 50mm × 1.0mm.The radiating element 1 is the monopole antenna of metal plate material, and metal plate thickness is
0.5mm, the size of the radiating element 1 are 30mm × 12.5mm × 10mm.
Embodiment 2
As shown in Figure 1, 2, antenna provided in this embodiment is additionally arranged microstrip line 6 on the basis of the antenna of embodiment 1,
Wherein the microstrip line 6 is arranged on the feed substrate 2, and the microstrip line 6 is isolated with the ground level 21, without electrical
Connection；The feed structure 22 is electrically connected by the microstrip line 6 with the gradual change feed structure 11, meanwhile, the feed
Excitation port 7 is provided on substrate 2, the excitation port 7 is isolated with the ground level 21, without electrical connection；It is described to swash
It encourages port 7 and the feed structure 22 is electrically connected.It is provided with the excitation port 7, it when in use can be by 50 ohm coaxials electricity
Cable level is welded at this.
Further, as a preferred embodiment, in the present embodiment, the feed structure 22, the microstrip line 6
Coplanar waveguide structure is used on feed substrate 2.Coplanar waveguide structure refers to that the feed structure 22, the microstrip line 6 are made
It is standby in the same plane, coplanar waveguide structure, which has, is easy production, convenient for being installed in parallel component and improve installation elements circuit
The advantages of density.
Wherein, the feed substrate 2 is dual platen, and the ground level 21 includes being separately positioned on the feed substrate 2 the
On one side, first ground level 211 and the second ground level 212 in the second face, first ground level 211 and second ground level
It is isolated between 212 and the feed structure 22, the microstrip line 6, the excitation port 7, without electrical connection；Described first
Ground level 211 and second ground level 212 and the short-circuit minor matters 13 are electrically connected；The feed structure 22, the excitation
The first face of the feed substrate 2 is arranged in port 7 and the microstrip line 6.First Horizon on feed 2 two sides of substrate
Face 211, second ground level 212 are electrically connected by 50 metallization VIAs 8.The quantity of the metallization VIA 8
It can be adjusted according to the actual situation when specifically used, the metallization VIA more than 8, earthing effect is better.Such as Fig. 2 institute
Show, the surrounding of the feed substrate 2, surrounding, the surrounding of the feed structure 22 of the short-circuit minor matters 13 offer several
The metallization VIA 8.
Fig. 3,4,5,6,7 are the test result figure of the antenna of the present embodiment.
Fig. 3 is the schematic diagram of the input impedance of antenna.It can be seen from the figure that antenna has in 2~3GHz of low-frequency range
Very high resistance and capacitance characteristic.In 3.0~5.0GHz frequency range, the resistance value (real part of input impedance) of antenna is close to 50 Europe
Nurse, reactance value (imaginary part of input impedance) is close to 0, and in 5.0~6.0GHz frequency range, antenna has lower resistance and inductance special
Property.
Fig. 4 is that whether there is or not the schematic diagrames that the short-circuit minor matters 13 influence antenna reflection coefficient.Described in being not provided with when antenna
When short-circuit minor matters 13, for antenna similar to traditional monopole antenna, antenna terminal belongs to capacitive load, and open-end, antenna tool
There is high-impedance behavior.The resonance frequency point of antenna is in 5.26GHz.When in one group of the addition of the antenna two sides symmetrical short-circuit minor matters 13
When, antenna introduces perception load in folded portion, and has low impedance characteristic, and current path is elongated.Antenna is in low frequency 3.33GHz
Introduce new resonance point.Originally the resonance point of high frequency is displaced to 4.77GHz.The impedance bandwidth (S11 < -15dB) of antenna is at this time
3.16~5.13GHz.Relative bandwidth is 47.5%, and bandwidth is extended.
Fig. 5 is schematic diagram of the antenna height to reflective index impacts.With the increase of antenna height, the radiating element 1
On current path it is elongated, resonance point is toward low frequency field offset.Meanwhile antenna becomes closer to 50 Europe in the input impedance of high frequency
Nurse.When antenna height is 10cm, the impedance bandwidth (S11 < -15dB) of antenna is 3.16~5.13GHz.
Fig. 6 is emulation 3D antenna pattern of the antenna in four different frequency ranges.3.3GHz, 3.6GHz, 4.8GHz,
Antenna has good low directionality at 5.0GHz, and gain is 4.79dBi, 5.33dBi, 5.42dBi and 5.88dBi respectively.
Fig. 7 is the simulated gain schematic diagram of antenna.Gain variation range of the antenna in 3.16~5.13 frequency ranges is 4.79
~7.4dBi, change in gain are less than 3dB, and antenna gain is relatively stable.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this
Made any modifications, equivalent replacements, and improvements etc., should be included in the claims in the present invention within the spirit and principle of invention
Protection scope within.
Claims (10)
1. broadband miniature antenna, including radiating element (1), feed substrate (2) and reflecting plate (3), the feed substrate (2)
It is set on the reflecting plate (3), the radiating element (1) is set on the feed substrate (2)；The feed substrate (2)
On be provided with ground level (21) and feed structure (22), be isolated between the ground level (21) and the feed structure (22), no
It is electrically connected；It is characterized by: the radiating element (1) includes gradual change feed structure (11), radiant panel (12) and short circuit
Minor matters (13)；The radiant panel (12) is set on the feed substrate (2), and the radiant panel (12) is fed by the gradual change
Structure (11) and the feed structure (22) are electrically connected；The radiant panel (12) passes through short-circuit minor matters (13) and described
Plane (21) electrical connection.
2. broadband miniature antenna according to claim 1, it is characterised in that: the radiant panel (12) by it is described gradually
Become feed structure (11) and the short-circuit minor matters (13) are erected on the feed substrate (2).
3. broadband miniature antenna according to claim 1 or 2, it is characterised in that: the number of the short circuit minor matters (13)
Amount is two, and described two short circuit minor matters (13) are symmetricly set on the opposite two sides of the radiant panel (12).
4. broadband miniature antenna according to claim 3, it is characterised in that: the radiant panel (12) is adopted in preparation
With meander technology.
5. broadband miniature antenna according to claim 3, it is characterised in that: further include microstrip line (6), the feed
Structure (22) is electrically connected by the microstrip line (6) and the gradual change feed structure (11).
6. broadband miniature antenna according to claim 5, it is characterised in that: the microstrip line (6) is arranged described
It feeds on substrate (2), the microstrip line (6) is isolated with the ground level (21), without electrical connection.
7. broadband miniature antenna according to claim 6, it is characterised in that: the feed structure (22), described micro-
Band line (6) uses coplanar waveguide structure on the feed substrate (2).
8. broadband miniature antenna according to claim 6, it is characterised in that: be provided on the feed substrate (2)
Excitation port (7), the excitation port (7) are isolated with the ground level (21), without electrical connection；The excitation port
(7) it is electrically connected with the feed structure (22).
9. broadband miniature antenna according to claim 8, it is characterised in that: the feed substrate (2) is dual platen,
The ground level (21) includes the first ground level (211) and for being separately positioned on feed (2) first face of substrate, the second face
It is two ground levels (212), first ground level (211) and second ground level (212) and the feed structure (22), described
Microstrip line (6), the excitation port are isolated between (7), without electrical connection；First ground level (211) and described
Two ground levels (212) and the short-circuit minor matters (13) are electrically connected；The feed structure (22), the excitation port (7) and institute
Microstrip line (6) setting is stated in the first face of feed substrate (2).
10. broadband miniature antenna according to claim 9, it is characterised in that: (2) first face of feed substrate,
First ground level (211), second ground level (212) on second face is by being provided on the feed substrate (2)
Metallization VIA (8) be electrically connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910267298.5A CN110165423B (en) | 2019-04-03 | 2019-04-03 | Broadband miniaturized antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910267298.5A CN110165423B (en) | 2019-04-03 | 2019-04-03 | Broadband miniaturized antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110165423A true CN110165423A (en) | 2019-08-23 |
| CN110165423B CN110165423B (en) | 2024-03-12 |
Family
ID=67638856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910267298.5A Active CN110165423B (en) | 2019-04-03 | 2019-04-03 | Broadband miniaturized antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110165423B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112397887A (en) * | 2020-12-04 | 2021-02-23 | 贵州航天凯山石油仪器有限公司 | Indicator diagram sensor built-in antenna |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5146232A (en) * | 1990-03-01 | 1992-09-08 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Low profile antenna for land mobile communications |
| CN206076489U (en) * | 2016-08-17 | 2017-04-05 | 深圳市普方众智精工科技有限公司 | Wideband folded monopole sub-antenna unit and antenna |
| KR101856880B1 (en) * | 2016-12-16 | 2018-05-10 | 호남대학교 산학협력단 | Patch antenna system using air dielectric |
| CN209592318U (en) * | 2019-04-03 | 2019-11-05 | 京信通信***（中国）有限公司 | Broadband miniature antenna |
-
2019
- 2019-04-03 CN CN201910267298.5A patent/CN110165423B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5146232A (en) * | 1990-03-01 | 1992-09-08 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Low profile antenna for land mobile communications |
| CN206076489U (en) * | 2016-08-17 | 2017-04-05 | 深圳市普方众智精工科技有限公司 | Wideband folded monopole sub-antenna unit and antenna |
| KR101856880B1 (en) * | 2016-12-16 | 2018-05-10 | 호남대학교 산학협력단 | Patch antenna system using air dielectric |
| CN209592318U (en) * | 2019-04-03 | 2019-11-05 | 京信通信***（中国）有限公司 | Broadband miniature antenna |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112397887A (en) * | 2020-12-04 | 2021-02-23 | 贵州航天凯山石油仪器有限公司 | Indicator diagram sensor built-in antenna |
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| Publication number | Publication date |
|---|---|
| CN110165423B (en) | 2024-03-12 |
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Effective date of registration: 20200107 Address after: 510663 No. 10, Shenzhou Road, Science City, Guangzhou, economic and Technological Development Zone, Huangpu District, Guangzhou, Guangdong Province Applicant after: COMBA TELECOM SYSTEMS (CHINA) Ltd. Address before: 510730 Economic and Technological Development Zone, Huangpu District, Guangzhou City, Guangdong Province, No. 10 Shenzhou Road, Guangzhou Science City Applicant before: COMBA TELECOM SYSTEMS (CHINA) Ltd. Applicant before: COMBA TELECOM SYSTEMS (GUANGZHOU) Ltd. Applicant before: COMBA TELECOM TECHNOLOGY (GUANGZHOU) Ltd. Applicant before: TIANJIN COMBA TELECOM SYSTEMS Ltd. |
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Address after: 510663 No. 10, Shenzhou Road, Guangzhou Science City, Guangzhou Economic and Technological Development Zone, Huangpu District, Guangzhou City, Guangdong Province Applicant after: Jingxin Network System Co.,Ltd. Address before: 510663 No.10, Shenzhou Road, Guangzhou Science City, economic and Technological Development Zone, Huangpu District, Guangzhou City, Guangdong Province Applicant before: COMBA TELECOM SYSTEMS (CHINA) Ltd. |
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