CN112886199A - Four-in-one antenna assembly and tablet computer - Google Patents
Four-in-one antenna assembly and tablet computer Download PDFInfo
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- CN112886199A CN112886199A CN202110294385.7A CN202110294385A CN112886199A CN 112886199 A CN112886199 A CN 112886199A CN 202110294385 A CN202110294385 A CN 202110294385A CN 112886199 A CN112886199 A CN 112886199A
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- 230000005855 radiation Effects 0.000 claims abstract description 64
- 230000008878 coupling Effects 0.000 claims abstract description 45
- 238000010168 coupling process Methods 0.000 claims abstract description 45
- 238000005859 coupling reaction Methods 0.000 claims abstract description 45
- 238000004891 communication Methods 0.000 abstract description 18
- 230000010354 integration Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
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- 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
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- 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
Abstract
The invention provides a four-in-one antenna assembly and a tablet personal computer, which comprise an antenna main body and a coaxial cable which are electrically connected; the antenna main body comprises a high-frequency unit, a connecting branch, a GPS radiating element and a WiFi radiating element; connect branch knot and high frequency unit interval setting, and one end links to each other and forms first coupling groove, and the other end is connected with the one end of GPS radiation array and the one end of wiFi radiation array. 5.8G WiFi frequency band resonance is generated by the high-frequency unit, GPS frequency band resonance is generated by the GPS radiation oscillator, and 2.4G resonance can be generated by the WiFi radiation oscillator for WiFi communication and Bluetooth communication, so that four antenna functions can be realized by only one antenna main body, and the integration level of the antenna is improved; the coaxial cable is connected with the antenna main body, so that the efficient feeding of the antenna main body is realized; by adjusting the size, the position, the distance and the like of each part of the antenna main body, the tuning of the corresponding frequency band can be realized, and the performance of the antenna is improved. The problem of among the current panel computer antenna integrated level low and the performance relatively poor is solved.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a four-in-one antenna assembly and a tablet computer.
Background
With the rapid development of the communication industry, 4G networks have become popular around the world, and people have higher and higher degrees of exchange with the internet. Mobile communication devices such as mobile phones and tablet computers have become essential life necessities in people's life. There is also an increasing demand for users on the rate and quality of tablet transmissions. The antenna is used as an important part of the tablet personal computer accessing the Internet, and the quality of the performance of the antenna directly determines the experience of a user.
However, the integration level of the antenna of the conventional tablet computer is low, so that the number of the antennas in the tablet computer is large, and therefore, the electromagnetic interference generated among the antennas is obvious, and the communication quality of the antennas is influenced; in addition, with the miniaturization and lightweight design of the tablet computer, the clearance of the antenna is smaller and smaller. Therefore, how to ensure the communication quality of the antenna in the limited space of the tablet computer becomes a problem which needs to be solved urgently.
Disclosure of Invention
The invention aims to provide a four-in-one antenna assembly and a tablet personal computer, and aims to solve the problems of low antenna integration level and poor performance in the conventional tablet personal computer.
In order to solve the above technical problem, the present invention provides a four-in-one antenna assembly, which includes an antenna main body and a coaxial cable, wherein the antenna main body is electrically connected to the coaxial cable; the antenna main body comprises a high-frequency unit, a connecting branch, a GPS radiating element and a WiFi radiating element; the connection minor matters with the high frequency unit interval sets up, and one end with the one end of high frequency unit is connected to form first coupling groove, the other end with the one end of GPS radiation array with the one end of wiFi radiation array is connected.
Optionally, in the four-in-one antenna assembly, the connecting branches and the high-frequency unit are arranged in parallel along the length direction; the GPS radiation array and the WiFi radiation array are arranged at 180 degrees and are parallel to the connecting branches along the length direction.
Optionally, in the four-in-one antenna assembly, a second coupling slot is formed between the GPS radiating array and the connection branch; and a third coupling slot is formed between the WiFi radiating oscillator and the high-frequency unit.
Optionally, in the four-in-one antenna assembly, the width of the second coupling slot is 0.5-4 mm; the width of the third coupling groove is 3-6 mm.
Optionally, in the four-in-one antenna assembly, the width of the first coupling slot is 0.5-4 mm.
Optionally, in the four-in-one antenna assembly, a GPS coupling slot is formed at a radiation end of the GPS radiation array; a WiFi coupling slot is formed at the radiation tail end of the WiFi radiation array; the radiation tail end of the GPS radiation array is opposite to the radiation tail end of the WiFi radiation array.
Optionally, in the four-in-one antenna assembly, a place is disposed on a side of the high-frequency unit close to the WiFi radiating element; and a feeding point is arranged at one end of the connecting unit, which is connected with the GPS radiating array and the WiFi radiating array.
Optionally, in the four-in-one antenna assembly, the coaxial cable includes a core wire and a shielding layer that are insulated from each other, the core wire is electrically connected to the feeding point, and the shielding layer is electrically connected to the location.
Optionally, in the four-in-one antenna assembly, the feeding point and the location are adjacently disposed.
In order to solve the above technical problem, the present invention further provides a tablet computer, where the tablet computer includes the four-in-one antenna assembly as described in any one of the above.
The invention provides a four-in-one antenna assembly and a tablet computer, wherein the four-in-one antenna assembly comprises an antenna main body and a coaxial cable, and the antenna main body is electrically connected with the coaxial cable; the antenna main body comprises a high-frequency unit, a connecting branch, a GPS radiating element and a WiFi radiating element; the connection minor matters with the high frequency unit interval sets up, and one end with the one end of high frequency unit is connected to form first coupling groove, the other end with the one end of GPS radiation array with the one end of wiFi radiation array is connected. 5.8G WiFi frequency band resonance is generated by the high-frequency unit, GPS frequency band resonance is generated by the GPS radiation oscillator, and 2.4G resonance can be generated by the WiFi radiation oscillator for WiFi communication and Bluetooth communication, so that four antenna functions can be realized by only one antenna main body, and the integration level of the antenna is improved; meanwhile, the coaxial cable is connected with the antenna main body, so that efficient feeding of the antenna main body is realized; in addition, through adjusting sizes such as size, position and the interval of high frequency unit, connection minor matters, GPS radiation array and wiFi radiation array, can realize the tuning to corresponding frequency channel to improve the performance of antenna. The problem of among the current panel computer antenna integrated level low and the performance relatively poor is solved.
Drawings
Fig. 1 is a schematic structural diagram of an antenna main body of a four-in-one antenna provided in this embodiment;
wherein the reference numerals are as follows:
110-a high frequency unit; 111-a location; 120-connecting branch; 121-feeding point; 130-GPS radiating oscillator; 140-WiFi radiating element; 210-a first coupling slot; 220 a second coupling groove; 230-a third coupling slot; 240-GPS coupling slot; 250-WiFi coupling slot.
Detailed Description
The four-in-one antenna assembly and the tablet computer according to the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention. Further, the structures illustrated in the drawings are often part of actual structures. In particular, the drawings may have different emphasis points and may sometimes be scaled differently.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the accompanying drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order, and it is to be understood that such structures as are used are interchangeable where appropriate. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be noted that, in this embodiment, the frequency band center value corresponding to the GPS is 1575 MHz; 2.4G WiFi and Bluetooth share 2400-2500 MHz frequency bands; the frequency band corresponding to 5.8G WiFi is 5100-5850 MHz.
The present embodiment provides a four-in-one antenna assembly, as shown in fig. 1, the four-in-one antenna assembly includes an antenna main body and a coaxial cable, where the antenna main body is electrically connected to the coaxial cable; the antenna body comprises a high-frequency unit 110, a connecting branch 120, a GPS radiating element 130 and a WiFi radiating element 140; the connection branch 120 and the high frequency unit 110 are arranged at an interval, one end of the connection branch is connected with one end of the high frequency unit 110 to form a first coupling slot 210, and the other end of the connection branch is connected with one end of the GPS radiation array 130 and one end of the WiFi radiation array 140.
According to the four-in-one antenna assembly provided by the embodiment, 5.8G WiFi frequency band resonance is generated by the high-frequency unit, GPS frequency band resonance is generated by the GPS radiation array, and 2.4G resonance can be generated by the WiFi radiation array for WiFi communication and Bluetooth communication, so that four antenna functions can be realized by only one antenna main body, and the integration level of the antenna is improved; meanwhile, the coaxial cable is connected with the antenna main body, so that efficient feeding of the antenna main body is realized; in addition, through adjusting sizes such as size, position and the interval of high frequency unit, connection minor matters, GPS radiation array and wiFi radiation array, can realize the tuning to corresponding frequency channel to improve the performance of antenna. The problem of among the current panel computer antenna integrated level low and the performance relatively poor is solved.
Specifically, in the present embodiment, the high frequency unit 110 is rectangular, and has a long side and a short side. The long side direction of the high frequency unit 110 is defined as a longitudinal direction. The connection branches 120 are disposed in parallel with the high frequency unit 110 along the length direction. At this time, one end of the connection branch 120 is connected to one corner of the high frequency unit 110, and the first coupling groove 210 is formed adjacent to the long side of the high frequency unit 110. So set up, because long limit size is longer, can make the tuning range great, be favorable to producing better antenna resonance effect.
By adjusting the width and length of the first coupling slot 210, the resonance effect of the GPS radiating array 130 and the WiFi radiating array 140 can be controlled, specifically, the resonance depth of the GPS and 2.4G WiFi (bluetooth) can be controlled. In the embodiment, through a lot of experiments, the inventor finds that the tuning effect is best when the width of the first coupling slot 210 is 0.5-4 mm, and the length setting needs to be determined according to the specific application environment and the overall size of the antenna.
Further, the GPS radiating element 130 and the WiFi radiating element 140 are arranged at 180 degrees, and are parallel to the connection branch 120 along the length direction. GPS radiation oscillator 130 with WiFi radiation oscillator 140 is 180 settings, promptly GPS radiation oscillator 130 with WiFi radiation oscillator 140 horizontal setting, so can effectively reduce the whole space that the antenna main part occupy, practices thrift the space. In addition, the dimension range of resonance generated between the GPS radiating element 130 and the WiFi radiating element 140 and the connection branch 120 is large due to the fact that the GPS radiating element is parallel to the connection branch 120 along the length direction, which is beneficial to tuning of resonance.
In this embodiment, a second coupling slot 220 is formed between the GPS radiating array 130 and the connection branch 120. The requirement of the GPS wavelength is met by adjusting the second coupling groove 220, the resonance depth of the GPS antenna is finely adjusted by adjusting the first coupling groove 210 after the wavelength reaches 1/4, and therefore the GPS communication function is achieved and the GPS communication quality is guaranteed. Specifically, the inventor finds that the resonance effect of the GPS antenna is best when the width of the second coupling groove is 0.5-4 mm through a large number of simulation experiments.
And, in this embodiment, a third coupling slot 230 is formed between the WiFi radiating element 140 and the high frequency unit 110. Since the third coupling slot 230 is a gap between the high frequency unit 110 and the WiFi radiating element 140, while the high frequency unit 110 is used for 5.8G WiFi communication and the WiFi radiating element 140 is used for 2.4G WiFi communication, 2.4G and 5.8G WiFi can be tuned simultaneously by adjusting the size of the third coupling slot 230. In addition, since the third coupling groove 230 communicates with the first coupling groove 210, the third coupling groove 230 also affects the resonant depths of the WiFi and GPS antennas. It can be seen that the design of the third coupling slot 230 is particularly important in the antenna body structure provided by the present embodiment. Through a large number of simulation verification tests, the inventor finds that when the width of the third coupling groove is 3-6 mm, the radiation performance of each frequency band of the antenna main body is the best.
Preferably, in the present embodiment, a GPS coupling slot 240 is formed at the radiation end of the GPS radiation array 130. The current flowing through the GPS radiating array 130 is coupled through the GPS coupling slot 240, so that the radiation intensity and performance of the GPS signal are improved.
Similarly, in the present embodiment, a WiFi coupling slot 250 is formed at the radiation end of the WiFi radiation oscillator 140. The current flowing through the WiFi radiating oscillator 140 is coupled through the WiFi coupling slot 250, so that the radiation intensity and performance of the 2.4G WiFi signal are improved.
Furthermore, the radiation end of the GPS radiation oscillator 130 and the radiation end of the WiFi radiation oscillator 140 are arranged oppositely, so that the isolation between the GPS signal and the 2.4G WiFi signal is high, and signal crosstalk is avoided. Meanwhile, the design of the coupling groove and the connection relation is considered, so that the size of the space occupied by the antenna body can be effectively reduced.
In order to realize the feeding of the antenna main body, a place and a feeding point are also arranged on the antenna main body. Specifically, in this embodiment, a place 111 is disposed on a side of the high-frequency unit 110 close to the WiFi radiating element 140; a feeding point 121 is arranged at one end of the connection unit 120, which is connected with the GPS radiating element 130 and the WiFi radiating element 140. The feeding point 121 is arranged at the connection position of the connection unit 120, the GPS radiating array 130 and the WiFi radiating array 140, which is beneficial for current to flow out from the feeding point 121 and then to be dispersed to each area, thereby ensuring the radiation intensity and performance of each frequency band. Since the area of the high frequency unit 110 is the largest in the present embodiment, the location 111 is disposed at the high frequency unit 110, which facilitates the current in each region to flow back to the ground, thereby improving the current efficiency.
Further, in this embodiment, the coaxial cable includes a core wire and a shielding layer, which are insulated from each other, the core wire is electrically connected to the feeding point, and the shielding layer is electrically connected to the ground. The connection of coaxial cables to the feeding points and sites is well known to those skilled in the art, for example by means of soldering; and, the structure, size, material, etc. of the coaxial cable are all selectable by those skilled in the art according to actual situations, and are not described herein again. In addition, the other end of the coaxial cable may be connected to the circuit main board through a terminal that is crimped or soldered.
In this embodiment, the feeding point 121 and the location 111 are disposed adjacent to each other to facilitate connection of the coaxial cable to the feeding point and the location and avoid risks of short circuit caused by excessively long exposed core wires.
The present embodiment further provides a tablet computer, including the four-in-one antenna assembly provided in the present embodiment.
According to the tablet personal computer provided by the embodiment, because the four-in-one antenna assembly can generate 5.8G WiFi frequency band resonance through the high-frequency unit, generate GPS frequency band resonance through the GPS radiation array, and generate 2.4G resonance through the WiFi radiation array for WiFi communication and Bluetooth communication, four antenna functions can be realized through only one antenna main body, and the integration level of the antenna is improved; meanwhile, the coaxial cable is connected with the antenna main body, so that efficient feeding of the antenna main body is realized; in addition, through adjusting sizes such as size, position and the interval of high frequency unit, connection minor matters, GPS radiation array and wiFi radiation array, can realize the tuning to corresponding frequency channel to improve the performance of antenna. The problem of among the current panel computer antenna integrated level low and the performance relatively poor is solved.
In summary, the four-in-one antenna assembly and the tablet computer provided in the present embodiment include an antenna main body and a coaxial cable, where the antenna main body is electrically connected to the coaxial cable; the antenna main body comprises a high-frequency unit, a connecting branch, a GPS radiating element and a WiFi radiating element; the connection minor matters with the high frequency unit interval sets up, and one end with the one end of high frequency unit is connected to form first coupling groove, the other end with the one end of GPS radiation array with the one end of wiFi radiation array is connected. 5.8G WiFi frequency band resonance is generated by the high-frequency unit, GPS frequency band resonance is generated by the GPS radiation oscillator, and 2.4G resonance can be generated by the WiFi radiation oscillator for WiFi communication and Bluetooth communication, so that four antenna functions can be realized by only one antenna main body, and the integration level of the antenna is improved; meanwhile, the coaxial cable is connected with the antenna main body, so that efficient feeding of the antenna main body is realized; in addition, through adjusting sizes such as size, position and the interval of high frequency unit, connection minor matters, GPS radiation array and wiFi radiation array, can realize the tuning to corresponding frequency channel to improve the performance of antenna. The problem of among the current panel computer antenna integrated level low and the performance relatively poor is solved.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.
Claims (10)
1. A four-in-one antenna assembly is characterized by comprising an antenna main body and a coaxial cable, wherein the antenna main body is electrically connected with the coaxial cable; the antenna main body comprises a high-frequency unit, a connecting branch, a GPS radiating element and a WiFi radiating element; the connection minor matters with the high frequency unit interval sets up, and one end with the one end of high frequency unit is connected to form first coupling groove, the other end with the one end of GPS radiation array with the one end of wiFi radiation array is connected.
2. The four-in-one antenna assembly according to claim 1, wherein the connecting branches and the high-frequency unit are arranged in parallel along the length direction; the GPS radiation array and the WiFi radiation array are arranged at 180 degrees and are parallel to the connecting branches along the length direction.
3. The four-in-one antenna assembly of claim 2, wherein a second coupling slot is formed between the GPS radiating array and the connection stub; and a third coupling slot is formed between the WiFi radiating oscillator and the high-frequency unit.
4. The four-in-one antenna assembly as claimed in claim 3, wherein the width of the second coupling slot is 0.5-4 mm; the width of the third coupling groove is 3-6 mm.
5. The four-in-one antenna assembly as claimed in claim 1, wherein the width of the first coupling slot is 0.5-4 mm.
6. The four-in-one antenna assembly of claim 1, wherein a GPS coupling slot is formed at a radiating end of the GPS radiating array; a WiFi coupling slot is formed at the radiation tail end of the WiFi radiation array; the radiation tail end of the GPS radiation array is opposite to the radiation tail end of the WiFi radiation array.
7. The four-in-one antenna assembly of claim 1, wherein the high frequency unit is provided with a site near one side of the WiFi radiating element; and a feeding point is arranged at one end of the connecting unit, which is connected with the GPS radiating array and the WiFi radiating array.
8. The four-in-one antenna assembly of claim 7, wherein the coaxial cable comprises a core and a shielding layer insulated from each other, the core being electrically connected to the feeding point, the shielding layer being electrically connected to the ground point.
9. The four-in-one antenna assembly of claim 7, wherein the feed point and the site are disposed adjacent to each other.
10. A tablet computer, wherein the tablet computer comprises the four-in-one antenna assembly according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110294385.7A CN112886199A (en) | 2021-03-19 | 2021-03-19 | Four-in-one antenna assembly and tablet computer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110294385.7A CN112886199A (en) | 2021-03-19 | 2021-03-19 | Four-in-one antenna assembly and tablet computer |
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| Publication Number | Publication Date |
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| CN112886199A true CN112886199A (en) | 2021-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110294385.7A Pending CN112886199A (en) | 2021-03-19 | 2021-03-19 | Four-in-one antenna assembly and tablet computer |
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| US20050200556A1 (en) * | 2004-03-09 | 2005-09-15 | Hsien-Chu Lin | Dual-band antenna with an impedance transformer |
| US20050243006A1 (en) * | 2004-04-30 | 2005-11-03 | Hsien-Chu Lin | Dual-band antenna with low profile |
| US20070040750A1 (en) * | 2005-08-22 | 2007-02-22 | Hon Hai Precision Ind. Co., Ltd. | Multi-band antenna |
| JP2008160319A (en) * | 2006-12-21 | 2008-07-10 | Nissei Electric Co Ltd | Antenna element |
| TWM533332U (en) * | 2016-08-11 | 2016-12-01 | Wistron Neweb Corp | Antenna structure |
| CN107453034A (en) * | 2017-07-31 | 2017-12-08 | 北京小米移动软件有限公司 | A kind of antenna for terminal device |
| CN111063981A (en) * | 2019-12-10 | 2020-04-24 | 西安易朴通讯技术有限公司 | Antenna assembly and electronic equipment |
| CN112490624A (en) * | 2020-11-23 | 2021-03-12 | 昆山睿翔讯通通信技术有限公司 | WiFi antenna and mobile terminal |
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2021
- 2021-03-19 CN CN202110294385.7A patent/CN112886199A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001026182A1 (en) * | 1999-10-04 | 2001-04-12 | Smarteq Wireless Ab | Antenna means |
| US20050200556A1 (en) * | 2004-03-09 | 2005-09-15 | Hsien-Chu Lin | Dual-band antenna with an impedance transformer |
| US20050243006A1 (en) * | 2004-04-30 | 2005-11-03 | Hsien-Chu Lin | Dual-band antenna with low profile |
| US20070040750A1 (en) * | 2005-08-22 | 2007-02-22 | Hon Hai Precision Ind. Co., Ltd. | Multi-band antenna |
| JP2008160319A (en) * | 2006-12-21 | 2008-07-10 | Nissei Electric Co Ltd | Antenna element |
| TWM533332U (en) * | 2016-08-11 | 2016-12-01 | Wistron Neweb Corp | Antenna structure |
| CN107453034A (en) * | 2017-07-31 | 2017-12-08 | 北京小米移动软件有限公司 | A kind of antenna for terminal device |
| CN111063981A (en) * | 2019-12-10 | 2020-04-24 | 西安易朴通讯技术有限公司 | Antenna assembly and electronic equipment |
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Guo jiahuodiqu after: Zhong Guo Address after: 215300 Room 009, No. 55, Shengchuang Road, Yushan Town, Kunshan, Suzhou, Jiangsu Province Applicant after: KUNSHAN RUIXIANG XUNTONG COMMUNICATION TECHNOLOGY Co.,Ltd. Address before: 215300 no.1689-5 Zizhu Road, Yushan Town, Kunshan City, Suzhou City, Jiangsu Province Applicant before: KUNSHAN RUIXIANG XUNTONG COMMUNICATION TECHNOLOGY Co.,Ltd. Guo jiahuodiqu before: Zhong Guo |