CN107819203B - Magnetoelectric dipole antenna of super-surface dielectric plate - Google Patents
Magnetoelectric dipole antenna of super-surface dielectric plate Download PDFInfo
- Publication number
- CN107819203B CN107819203B CN201710912550.4A CN201710912550A CN107819203B CN 107819203 B CN107819203 B CN 107819203B CN 201710912550 A CN201710912550 A CN 201710912550A CN 107819203 B CN107819203 B CN 107819203B
- Authority
- CN
- China
- Prior art keywords
- antenna
- super
- dielectric plate
- dielectric
- dielectric layer
- Prior art date
- 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.)
- Active
Links
Images
Classifications
-
- 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
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- 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
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
- H01Q9/20—Two collinear substantially straight active elements; Substantially straight single active elements
Abstract
The invention provides a magnetoelectric dipole antenna of a super-surface dielectric plate, which comprises a first dielectric layer, a second dielectric layer and a third dielectric layer, wherein a pair of short-circuit columns and a vertical transmission line penetrate through the three dielectric layers, and a feed structure is arranged in the middle of each dielectric layer; a vertical transmission line and a feed structure are used to feed the magneto-electric dipole antenna. The invention widens the frequency band by designing the slot with a proper shape on the electric dipole, the impedance bandwidth of the antenna has the range of low frequency from 3.12GHz to 5.92GHz and high frequency from 7.14GHz to 8.45 GHz. The gain ripple is from 6.0dBi to 8.9dBi at low frequencies and from 6.7dBi to 9.6dBi at high frequencies. Nearly symmetrical directional radiation patterns in both the E-plane and H-plane radiating planes can be achieved over the entire operating frequency band of the antenna. The invention combines the traditional magnetoelectric dipole antenna technology and the super-surface technology, and realizes the functions of wide frequency band, high gain, directional radiation and the like of the antenna.
Description
[ technical field ]
The invention belongs to the technical field of communication, and particularly relates to a magnetoelectric dipole antenna of a super-surface dielectric plate.
[ background art ]
In the current development of antenna information transmission technology, different frequency bands are divided and used in succession, and each subdivision represents a rapid progress of communication technology. In the development of the first generation (1G) to the fourth generation (4G) mobile communication systems, we can find that the communication field is gradually moving to the broadband and high frequency direction, and the higher and higher frequency represents the continuous increase of the communication speed. With the increasing of communication frequency and the development of antenna technology, the internet speed of internet access is gradually increased, and mobile phones can realize most functions which can be operated on computers before, such as video chat, mobile phone games, internet transfer and the like. The pursuit of higher-speed communication not only brings an unprecedented great development prospect to the development of the internet industry, but also brings greater challenges to the antenna technology.
The originally proposed magnetoelectric dipole antenna has undergone a great deal of research and has made many advances, and the current magnetoelectric dipole antenna has many excellent characteristics, such as high gain, complementary type directional radiation of E-plane and H-plane, and the like. Moreover, the metamaterial attracts many researchers' attention due to its excellent characteristics in the fields of physical and electronic engineering. The antenna has the characteristics of improving the transmission of electromagnetic radiation, improving the relative dielectric constant and the like, and can be used for reducing the size of the antenna, realizing frequency reconfiguration, improving the gain of the antenna and the like.
For magnetoelectric dipole antennas, many developments and improvements have been made in the follow-up work from microstrip antennas combining such novel dipoles with relatively stability for the first time. A broadband dual-band magnetoelectric dipole antenna has been proposed, but such a dual-band magnetoelectric dipole antenna has a relatively large volume and a relatively high profile, and cannot satisfy the requirement of miniaturization. In subsequent research, the dielectric plate is combined with the magnetoelectric dipole antenna, so that the section height of the antenna is greatly reduced, but on the other hand, the defects of narrow working bandwidth, reduced gain and the like of the antenna are caused.
With respect to the development of super-surface antennas, many researchers have been working on the combination of super-surfaces and antennas. The super-surface is used for inhibiting the lateral radiation of the antenna and enhancing the forward radiation of the antenna, so that the gain of the antenna is improved. The super-surface is simulated above the radiating antenna, and the super-surface is rotated around the center, so that the reconfigurable functions of the antenna, such as frequency reconfigurable and polarization reconfigurable, are realized. But the operating bandwidths of such super-surface antennas are very narrow.
[ summary of the invention ]
Aiming at the technical defects, the invention provides a novel dielectric plate super-surface magnetoelectric dipole antenna. .
The invention discloses a magnetoelectric dipole antenna applied to 5G communication, which adopts the following technical scheme:
a magnetoelectric dipole antenna of a super-surface dielectric plate comprises a first dielectric layer, a second dielectric layer and a third dielectric layer, wherein a pair of short-circuit columns and a vertical transmission line penetrate through the three dielectric layers, and a feed structure is arranged in the middle of each dielectric layer; a vertical transmission line and a feed structure are used to feed the magneto-electric dipole antenna.
The lower surface of the third medium layer is a reflective ground, a pair of short circuit columns and the reflective ground form a magnetic dipole, the upper surface of the third medium layer is a super surface, and the super surface is formed by I-shaped unit patches and used for improving the gain of the antenna and reducing the height of the antenna;
the upper surface of the first medium layer is an electric dipole patch, and a first horizontal coupling band in the middle of the electric dipole patch is trapezoidal.
Furthermore, the feed structure is connected with one end of a first horizontal coupling band through a transmission line, the other end of the first horizontal coupling band is connected with a first vertical coupling band, a second horizontal coupling band is connected below the first vertical coupling band, two vertical coupling bands are connected on two sides below the second horizontal coupling band, and the length of a current path is increased in a limited space, so that excellent impedance matching is obtained, the effective bandwidth is widened, and the section height is reduced.
Furthermore, the electric dipole patch is an arc-shaped edge, and the middle part of the electric dipole patch is a zigzag slot, so that the characteristic of double broadband is obtained.
Further, the dielectric plate is a Rogers5880 dielectric plate, the thickness of the first dielectric plate is 1.52mm, the thickness of the second dielectric plate is 3.75mm, and the thickness of the third dielectric plate is 3.75 mm.
The invention widens the frequency band by designing the slot with a proper shape on the electric dipole, the impedance bandwidth of the antenna ranges from 3.12GHz to 5.92GHz in low frequency and from 7.14GHz to 8.45GHz in high frequency (standing wave ratio is less than 2). The gain ripple is from 6.0dBi to 8.9dBi at low frequencies and from 6.7dBi to 9.6dBi at high frequencies. Nearly symmetrical directional radiation patterns in both the E-plane and H-plane radiating planes can be achieved over the entire operating frequency band of the antenna. The antenna can achieve cross polarization less than-22 dB and front-to-back ratio greater than 20dB on two different radiating surfaces. The invention combines the traditional magnetoelectric dipole antenna technology and the super-surface technology, and realizes the functions of wide frequency band, high gain, directional radiation and the like of the antenna.
[ description of the drawings ]
Fig. 1 shows a first dielectric layer structure of the antenna of the present invention.
Fig. 2 is a second dielectric layer structure of the antenna of the present invention.
Fig. 3 is a third dielectric layer structure of the antenna of the present invention.
Fig. 4 shows the antenna geometry according to the invention.
Fig. 5 is a schematic diagram of the antenna feeding structure of the present invention.
Fig. 6 shows the standing wave ratio and gain of the antenna simulation result of the present invention.
Fig. 7 is a diagram of the antenna dimensions of the present invention.
Fig. 8 is a radiation pattern of the antenna of the present invention.
Fig. 9 is a perspective view of the antenna of the present invention.
1 is a first medium layer, 2 is a second medium layer, 3 is a third medium layer, 4 is an electric dipole patch, 5 is a first short-circuit column, 6 is a second short-circuit column, 7 is a horizontal coupling band, and 8 is an I-type unit patch.
[ detailed description of the invention ]
In order to make the technical means by which the invention is implemented clear, the invention is further elucidated below with reference to the accompanying drawings, in which the terms "first", "second", "third", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.
As shown in fig. 1-4, a magnetoelectric dipole antenna of a super-surface dielectric plate comprises a first dielectric layer 1, a second dielectric layer 2, and a third dielectric layer 3, wherein the antenna is printed on a three-layer dielectric plate, a pair of short- circuit columns 5 and 6 and a vertical transmission line penetrate through the three dielectric layers, and a feed structure is arranged in the middle of the dielectric layers; a vertical transmission line and a feed structure are used to feed the magneto-electric dipole antenna.
As shown in fig. 3, the lower surface of the third dielectric layer 3 is a reflective ground, a pair of short-circuit pillars and the reflective ground form a magnetic dipole, the upper surface of the third dielectric layer is a super-surface, and the super-surface is formed by an "I" -shaped unit patch and is used for improving the gain of the antenna and reducing the height of the antenna; the main principle is that the periodic unit structure of the super surface enables energy to be reflected for multiple times between a magnetoelectric dipole and the super surface, so that the gain of the antenna is improved; and meanwhile, the super-surface energy reduces the effective electrical length, so that the height of the antenna is reduced. In this embodiment, the number of the I-shaped unit patches is 4 × 8 in total, and the plurality of I-shaped unit patches form a super surface, so that the gain of the antenna is improved and the height of the antenna is reduced.
As shown in fig. 1, the upper surface of the first dielectric layer 1 is an electric dipole patch 4, a horizontal coupling strip 7 is arranged in the middle of the electric dipole patch 4, and the horizontal coupling strip 7 is connected with a feed structure. The electric dipole patch 4 is an arc-shaped edge, and a zigzag slot is formed in the middle, so that the characteristic of double broadband is obtained.
Fig. 4 also enlarges the structure of the horizontal coupling strip 7, and the horizontal coupling strip is in a trapezoid shape, the longer bottom side of the trapezoid is correspondingly provided with an opening of a transmission line for connecting with the feed structure, and the shorter bottom side of the trapezoid is provided with a smaller opening for connecting with the feed structure and extending to the second dielectric layer 2 below.
The second dielectric layer 2 shown in fig. 2 has two shorting post holes in the middle for the shorting posts 5 and 6 to pass through and two connection points extending down from the feed structure. As shown in fig. 5, the feed structure is connected to one end of a first horizontal coupling strip through a transmission line, the other end of the first horizontal coupling strip is connected to a first vertical coupling strip, a second horizontal coupling strip is connected to the lower portion of the first vertical coupling strip, and two vertical coupling strips are connected to two sides of the lower portion of the second horizontal coupling strip, so that the length of a current path is increased in a limited space, thereby obtaining excellent impedance matching, widening an effective bandwidth, and reducing a profile height.
The dielectric plate shown above is a Rogers5880 dielectric plate, the thickness of the first dielectric plate is 1.52mm, the thickness of the second dielectric plate is 3.75mm, the thickness of the third dielectric plate is 3.75mm, and the size of the whole antenna unit is 60 × 60 × 7.92mm3。
Fig. 6 shows standing wave ratio and gain of simulation results of the antenna of the present invention, fig. 7 shows specific parameters of the size of the antenna of the embodiment of the present invention, fig. 8 shows radiation pattern of the antenna of the present invention, in order to implement multiple input and multiple output applications under 5G/WiMAX/WLAN/X-Band, the present invention embeds radiating electric dipoles and short circuit walls at different heights of a multilayer board medium in order to obtain low profile characteristics. Unlike conventional metamaterial surface antennas, we have achieved broadband and directional characteristics by introducing improved zigzag electromagnetic dipole antennas. Meanwhile, the combination of the metamaterial surface and the electromagnetic dipole antenna obviously improves the gain of the antenna. Finally, thanks to the three-dimensional hexagonal structure, the multi-input multi-output antenna system has good ECC (envelope correlation coefficient) and MEG (mean effective gain) performances, and can realize the excellent performance of 360-degree directional full coverage in the whole working frequency band. The antenna unit can realize the impedance bandwidth of 62.1% (3.12-5.92GHz) and the stable gain of 7.48 +/-1.43 dBi in the low frequency band, and the impedance bandwidth of 16.8% (7.14-8.45GHz) and the gain of 8.18 +/-1.43 dBi in the high frequency band. The antenna element size is 60 × 60 × 7.92mm 3. Therefore, the antenna is probably suitable for the directional communication of multi-input and multi-output under 5G/WiMA/WLAN/X-Band.
All technical schemes belonging to the principle of the invention belong to the protection scope of the invention. Modifications to the disclosed embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention.
Claims (3)
1. A magnetoelectric dipole antenna of a super-surface dielectric plate is characterized by comprising a first dielectric layer, a second dielectric layer and a third dielectric layer, wherein a pair of short-circuit columns and a vertical transmission line penetrate through the three dielectric layers; the vertical transmission line and the feed structure are used for feeding the magnetoelectric dipole antenna;
the lower surface of the third medium layer is a reflective ground, a pair of short circuit columns and the reflective ground form a magnetic dipole, the upper surface of the third medium layer is a super surface, and the super surface is formed by I-shaped unit patches and used for improving the gain of the antenna and reducing the height of the antenna;
the upper surface of the first medium layer is an electric dipole patch, and a first horizontal coupling band in the middle of the electric dipole patch is in a trapezoid shape;
the feed structure is connected with one end of a first horizontal coupling band through a transmission line, the other end of the first horizontal coupling band is connected with a first vertical coupling band, the lower part of the first vertical coupling band is connected with a second horizontal coupling band, two sides of the lower part of the second horizontal coupling band are connected with two vertical coupling bands, and the length of a current path is increased in a limited space, so that excellent impedance matching is obtained, the effective bandwidth is widened, and the section height is reduced;
the transmission line, the first layer of horizontal coupling strip, the second layer of horizontal coupling strip and all the vertical coupling strips are located between the pair of short-circuit posts.
2. The magnetoelectric dipole antenna of the super-surface dielectric plate according to claim 1, wherein the electric dipole patch is an arc-shaped edge, and a zigzag slot is formed in the middle for obtaining the characteristic of double broadband.
3. The magnetoelectric dipole antenna of the super-surface dielectric plate according to claim 1, wherein the dielectric plate is a Rogers5880 dielectric plate, the first dielectric plate has a thickness of 1.52mm, the second dielectric plate has a thickness of 3.75mm, and the third dielectric plate has a thickness of 3.75 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710912550.4A CN107819203B (en) | 2017-09-29 | 2017-09-29 | Magnetoelectric dipole antenna of super-surface dielectric plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710912550.4A CN107819203B (en) | 2017-09-29 | 2017-09-29 | Magnetoelectric dipole antenna of super-surface dielectric plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107819203A CN107819203A (en) | 2018-03-20 |
| CN107819203B true CN107819203B (en) | 2021-04-09 |
Family
ID=61607600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710912550.4A Active CN107819203B (en) | 2017-09-29 | 2017-09-29 | Magnetoelectric dipole antenna of super-surface dielectric plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107819203B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108598711A (en) * | 2018-03-28 | 2018-09-28 | 宇龙计算机通信科技(深圳)有限公司 | A kind of Anneta module and communication terminal |
| JP6915745B2 (en) * | 2018-03-30 | 2021-08-04 | 株式会社村田製作所 | Antenna module and communication device equipped with it |
| CN109802231B (en) * | 2018-07-17 | 2024-02-23 | 云南大学 | Broadband electromagnetic dipole antenna based on artificial magnetic conductor |
| CN109286081A (en) * | 2018-08-03 | 2019-01-29 | 西安电子科技大学 | The broadband plane array antenna of feeding substrate integrated waveguide |
| CN109346837A (en) * | 2018-09-28 | 2019-02-15 | 电子科技大学 | A kind of ultra wide band wide-angle scanning phased array based on magnetoelectricity dipole antenna |
| CN109449573B (en) | 2018-11-14 | 2020-10-02 | 深圳Tcl新技术有限公司 | Microstrip antenna and television |
| CN111403911B (en) * | 2020-04-08 | 2023-09-08 | 南京步微信息科技有限公司 | Low-profile broadband antenna |
| CN114725667B (en) * | 2022-04-01 | 2023-06-27 | 电子科技大学 | Be applied to magnetic electric dipole antenna of autopilot radar |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102790263A (en) * | 2011-05-20 | 2012-11-21 | 深圳光启高等理工研究院 | Antenna device |
| CN205723943U (en) * | 2016-05-09 | 2016-11-23 | 中国人民解放军理工大学 | A kind of broadband Fabry Paro resonant antenna |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103620870B (en) * | 2011-06-23 | 2017-02-15 | 加利福尼亚大学董事会 | Electrically small vertical split-ring resonator antennas |
| US9083086B2 (en) * | 2012-09-12 | 2015-07-14 | City University Of Hong Kong | High gain and wideband complementary antenna |
| US9478852B2 (en) * | 2013-08-22 | 2016-10-25 | The Penn State Research Foundation | Antenna apparatus and communication system |
| CN105449348A (en) * | 2014-07-31 | 2016-03-30 | 青岛海尔电子有限公司 | Electromagnetic dipole antenna |
| CN204067569U (en) * | 2014-09-05 | 2014-12-31 | 华南理工大学 | A kind of broadband dipole antenna based on artificial magnetic conductor structure |
| CN106654526A (en) * | 2016-11-25 | 2017-05-10 | 北京航空航天大学 | Lower-specific absorption rate circular polarization conformable antenna and manufacturing method |
-
2017
- 2017-09-29 CN CN201710912550.4A patent/CN107819203B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102790263A (en) * | 2011-05-20 | 2012-11-21 | 深圳光启高等理工研究院 | Antenna device |
| CN205723943U (en) * | 2016-05-09 | 2016-11-23 | 中国人民解放军理工大学 | A kind of broadband Fabry Paro resonant antenna |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107819203A (en) | 2018-03-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107819203B (en) | Magnetoelectric dipole antenna of super-surface dielectric plate | |
| US7079082B2 (en) | Coplanar waveguide continuous transverse stub (CPW-CTS) antenna for wireless communications | |
| CN109768380B (en) | Ultralow-profile patch antenna based on three-mode resonance and wireless communication system | |
| US10886611B2 (en) | Hybrid high gain antenna systems, devices, and methods | |
| CN107799892B (en) | Super-surface magnetoelectric dipole antenna with stacked dielectric plates | |
| CN109888486B (en) | Dual-polarized millimeter wave antenna monomer and array antenna | |
| Haji-hashemi et al. | Space-filling patch antennas with CPW feed | |
| CN108598691A (en) | Scanning Phased Array Antenna with Broadband based on the long slot antenna of tablet | |
| CN110444866A (en) | A kind of ternary micro-strip dipole antenna based on PEG and yagi aerial structure | |
| Parchin et al. | Dual-band phased array 5G mobile-phone antenna with switchable and hemispherical beam pattern coverage for MIMO-diversity communications | |
| CN113690584A (en) | Millimeter wave wide-angle scanning phased-array antenna based on substrate integrated ridge waveguide | |
| Malviya et al. | Wide-band meander line MIMO antenna for wireless applications | |
| Feng et al. | 5G Millimeter Wave Endfire Array Antenna with Printed Inverted-F Structure | |
| CN113258307B (en) | E-plane wide and narrow beam switching reconfigurable antenna | |
| CN113078460B (en) | High-isolation dual-polarization tightly-coupled phased array antenna unit based on slot coupling structure | |
| CN212517542U (en) | Terahertz end-fire array linear array antenna based on dipole antenna unit | |
| CN113839187A (en) | High-gain double-frequency microstrip antenna with parasitic element loaded | |
| Duan et al. | A Compact Low-Profile Vertically Polarized Endfire Leaky-Wave Antenna Based on Double-Sided Parallel Strip Line | |
| RU219082U1 (en) | MICROSTRIP ANTENNA FOR INTELLIGENT TRANSPORTATION SYSTEMS | |
| CN113745822B (en) | Design method of low cross polarization asymmetric millimeter wave oscillator antenna | |
| CN217114776U (en) | Base station antenna with small aperture and narrow beam | |
| Li et al. | Wideband, Wide-Angle Scanning Long Slot Array with FSS Superstrate | |
| Nahid et al. | A rectangular slotted dielectric substrate loaded Antipodal Vivaldi SIW antenna for X-band applications | |
| CN116454617A (en) | Ultra-wideband array antenna unit and finite array antenna | |
| Fattoum et al. | Performance evaluation of SMS rectangular microstrip patch antennas |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200910 Address after: 518000 Guangdong Shenzhen Baoan District Xixiang street, crane island community Hengfeng Industrial Town C6 building 1003, 1004 two, 1004 three, 1604A Applicant after: SHENZHEN SOUTH STAR TECHNOLOGY Co.,Ltd. Address before: 518000 Nanhai Road, Guangdong, Shenzhen, No. 3688, No. Applicant before: SHENZHEN University |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211222 Address after: 518126 1003, 1004-2, 1004-3, 1604A, complex building C6, Hengfeng Industrial City, Hezhou community, Xixiang street, Bao'an District, Shenzhen, Guangdong Patentee after: SHENZHEN SOUTH STAR TECHNOLOGY Co.,Ltd. Patentee after: SUNWAVE COMMUNICATIONS Co.,Ltd. Address before: 518000 1003, 1004-2, 1004-3, 1604A, building C6, Hengfeng Industrial City, Hezhou community, Xixiang street, Bao'an District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN SOUTH STAR TECHNOLOGY Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220704 Address after: 523921 Room 101, building 1, No. 3, Nanfang 1st Road, Chigang, Humen Town, Dongguan City, Guangdong Province Patentee after: Dongguan nandouxing Technology Co.,Ltd. Address before: 518126 1003, 1004-2, 1004-3, 1604A, complex building C6, Hengfeng Industrial City, Hezhou community, Xixiang street, Bao'an District, Shenzhen, Guangdong Patentee before: SHENZHEN SOUTH STAR TECHNOLOGY Co.,Ltd. Patentee before: Three dimensional communication Limited by Share Ltd |