CN111816983B - Terminal antenna system and mobile terminal - Google Patents
Terminal antenna system and mobile terminal Download PDFInfo
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- CN111816983B CN111816983B CN202010494619.8A CN202010494619A CN111816983B CN 111816983 B CN111816983 B CN 111816983B CN 202010494619 A CN202010494619 A CN 202010494619A CN 111816983 B CN111816983 B CN 111816983B
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- 239000002184 metal Substances 0.000 claims abstract description 105
- 230000005855 radiation Effects 0.000 claims abstract description 13
- 230000003071 parasitic effect Effects 0.000 claims abstract description 6
- 239000012811 non-conductive material Substances 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- 230000001413 cellular effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 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
- 230000008569 process Effects 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
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
- H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
- H01Q1/244—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas extendable from a housing along a given path
-
- 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
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
- H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
-
- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—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
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/10—Resonant antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/378—Combination of fed elements with parasitic elements
Abstract
The invention relates to a terminal antenna system and a mobile terminal, which comprise a metal middle frame, a frequency modulation unit, a system ground and a circuit board electrically connected with the system ground, wherein the frequency modulation unit is positioned in the metal middle frame, the circuit board is electrically connected with the system ground, a first gap and a second gap are arranged at the bottom end of the metal middle frame to form a first metal section and a second metal section, the metal middle frame also comprises a metal connecting sheet, the metal connecting sheet is suspended above the circuit board, the first end of the metal connecting sheet is connected with a signal feed end, the second end of the metal connecting sheet is connected with the frequency modulation unit, the third end of the metal connecting sheet is connected with the second metal section, the metal connecting sheet, the frequency modulation unit and the second metal section form a main radiation arm of the terminal antenna system, and the first metal section forms a parasitic radiation arm of the terminal antenna system. The invention can solve the problem that the radiation mode of an antenna system is influenced because a large amount of XY space is occupied because the SIM card holder needs to be put into the broken hole at the bottom of the metal middle frame in the prior art.
Description
Technical Field
The application belongs to the technical field of wireless communication, and particularly relates to a terminal antenna system and a mobile terminal.
Background
With the demand of people for lightness and thinness of electronic terminal products, and the popularity and popularization of current curved screens, even waterfall screens (curved screens with higher curvature, more than 75%), the SIM card holder and the card holder cannot be placed on two sides of the terminal. Meanwhile, the top of a general mobile terminal is provided with a camera and various sensor detectors, so that a plurality of terminal manufacturers are willing to place the SIM card seat and the card support at the bottom of the terminal when products are stacked, so that the bottom space is effectively utilized, and the stacking design of all functions is completed in an environment as compact as possible.
However, for the currently popular mobile terminal products in the metal middle frame stacking form, due to the introduction of the bottom SIM card holder and the card holder, a hole is needed to be drilled at the bottom of the metal middle frame, and the card holder is placed into the metal middle frame, which occupies a large amount of XY-direction space, so that the position of a seam required by the bottom antenna system is very limited. Because the complete and continuous metal part needs to be reserved before and after the SIM card support hole part, the broken seam position can only be arranged at the left side and the right side of the SIM card support hole part under the stacking limitation of the mode.
Patent application publication No. 108336480a discloses an antenna system and a mobile terminal, and relates to an antenna system implemented by using a metal middle frame and a broken seam, and the full-band coverage of 0.7-0.96GHz and 1.71-2.69GHz under the existing 4G cellular network is realized by adding a switch tuning system.
In the antenna system in the above patent application document, because the SIM card holder and the card holder are introduced, a hole is needed to be broken at the bottom of the metal middle frame, and the card holder is placed in the metal middle frame, which occupies a large amount of XY space, resulting in interference with the broken seam on one side of the metal middle frame and the electrical connection between the first radiation part and the second radiation part of the metal middle frame. In this case, the antenna system cannot be used unless the positions of the break and the electrical connection are changed. However, the radiation mode of the antenna system is seriously affected by the fact that the SIM card seat and the card support occupy a large X-direction size no matter the seam is broken by moving outwards or moving inwards.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the problem of because need put into the card support in the broken hole of metal center bottom among the prior art, occupied a large amount of XY to space, influence antenna system radiation pattern is solved.
In order to solve the technical problems, the invention provides a terminal antenna system and a mobile terminal, the embodiment of the invention is provided with a metal connecting sheet suspended above a circuit board, and the metal connecting sheet can be flexibly suitable for increasingly compact and deteriorated lower antenna environments by adjusting the size of the metal connecting sheet, and has more flexibility compared with an antenna system realized by only using a metal middle frame.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the invention provides a terminal antenna system, which comprises a metal middle frame, a system ground positioned in the metal middle frame and a circuit board electrically connected with the system ground, wherein a frequency modulation unit and an impedance matching unit are arranged on the circuit board;
the terminal antenna system also comprises a metal connecting sheet, the metal connecting sheet is suspended above the circuit board, a feed point, a contact point and a lap joint point are arranged on the metal connecting sheet, and the metal connecting sheet forms a third antenna unit;
the impedance matching unit is connected with a feed point of the metal connecting sheet, the frequency modulation unit is connected with a contact point of the metal connecting sheet, a lap joint of the metal connecting sheet is connected with the second metal section, the metal connecting sheet and the second metal section form a main radiation arm of the terminal antenna system, low frequency and medium frequency in a 4G frequency range are achieved, and the first metal section forms a parasitic radiation arm of the terminal antenna system, and high frequency in the 4G frequency range is achieved.
A second aspect of the present invention provides a mobile terminal comprising the terminal antenna system according to the first aspect of the present invention.
The invention has the beneficial effects that: the invention is provided with the metal connecting sheet suspended above the circuit board, can be flexibly applied to the increasingly compact and deteriorated lower antenna environment by adjusting the size of the metal connecting sheet, and has more flexibility compared with an antenna system realized by only using a metal middle frame.
Based on the stacking requirement of the SIM card, the invention realizes the full-band coverage of 0.7-0.96GHz and 1.71-2.69GHz in the existing 4G cellular network.
Drawings
The technical solution of the present application is further explained below with reference to the drawings and the embodiments.
Fig. 1 is a schematic structural diagram of a terminal antenna system according to an embodiment of the present application;
fig. 2 is a schematic circuit diagram of a frequency modulation unit and an impedance matching unit according to an embodiment of the present application;
fig. 3 is an antenna system efficiency diagram of an embodiment of the present application.
The reference numbers in the figures are: 1-metal connecting sheet, 2-second metal section, 3-first metal section, 4-USB interface, 5-SIM card holder module, 6-circuit board, 7-first gap, 8-second gap, 9-system ground, 10-metal middle frame, 11-feeding point, 12-contact point and 13-lap joint point, 14-impedance matching unit, 15-aperture tuning switch network.
Detailed Description
It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict.
The technical solutions of the present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
The terminal according to the embodiment of the present invention may be implemented in various forms, for example, the terminal described in the present invention may include a mobile terminal such as a mobile phone, a tablet computer, a notebook computer, a palm computer, a Personal Digital Assistant (PDA), a Portable Media Player (PMP), a navigation device, a wearable device, a smart band, a pedometer, and a fixed terminal such as a Digital TV, a desktop computer, and the like.
Example 1
The embodiment provides a terminal antenna system which can be applied to mobile terminals such as mobile phones and tablets. Generally, a mobile terminal such as a mobile phone or a tablet computer has a rectangular or rounded rectangular structure, and has a length direction and a width direction.
As shown in fig. 1, the terminal antenna system of this embodiment includes a metal middle frame 10, a system ground 9 located in the metal middle frame 10, and a circuit board 6 electrically connected to the system ground 9, wherein a first gap 7 and a second gap 8 are disposed at a bottom end of the metal middle frame, and it should be noted that the first gap 7 and the second gap 8 are filled with a non-conductive material to ensure structural strength and appearance quality of the mobile terminal.
The bottom frame of the metal middle frame 10 is divided by the first gap 7 and the second gap 8 to obtain a first metal section 3 and a second metal section 2, the first metal section 3 forms a first antenna unit, and the second metal section 2 forms a second antenna unit.
The terminal antenna system of the embodiment further comprises a metal connecting sheet 1, wherein the metal connecting sheet 1 is suspended above the circuit board 6, a feeding point 11, a contact point 12 and an overlapping point 13 are arranged on the metal connecting sheet 1, and the metal connecting sheet 1 forms a third antenna unit.
The circuit board 6 is provided with a frequency modulation unit and an impedance matching unit, the impedance matching unit is connected with a feed point 11 of the metal connecting sheet, the frequency modulation unit is electrically connected with a contact point 12 of the metal connecting sheet, and an overlapping point 13 of the metal connecting sheet is connected with the second metal section 8. The metal connecting sheet 1 and the second metal section 8 form a main radiating arm of the terminal antenna system, so that low frequency and medium frequency in a 4G frequency range are realized; the first metal segment 7 constitutes a parasitic radiating arm of the terminal antenna system, realizing high frequencies in the 4G frequency range.
The circuit board of this embodiment is a PCB board, and is connected to the system ground, and is mainly used for placing various electronic devices, wherein the widths of the first gap 7 and the second gap 8 are generally not less than 0.5 mm.
Optionally, a grounding point is arranged on the first metal segment 7, and the first metal segment 7 is connected with a system ground 9 through the grounding point; the second metal segment 8 is located between the first gap 7 and the second gap 8 and suspended from the system ground 9.
The second metal segment 8 is a segment of the metal middle frame suspended in the system ground, and travels through the second antenna unit. The left side and the right side of the second antenna unit are separated from the system ground by a first slot 7 and a second slot 8 on the metal middle frame, the upper part of the second antenna unit is separated from the system ground by an antenna clearance area, and the antenna clearance area of the embodiment is only 1 mm. The metal connecting sheet and the second antenna unit of the embodiment jointly form a main radiating arm of the terminal antenna system, and a fundamental mode and a frequency doubling mode of the main radiating arm are used for realizing low frequency and medium frequency in a 4G frequency range.
The first metal segment 3 forms a first antenna element, which is a parasitic radiating arm and also a segment of a metal middle frame, and is different in that one end of the first metal segment 3 is provided with a grounding point to be connected with a system ground, and the other end is separated from a second antenna element through a first gap 7. Its main role is to achieve high frequencies in the 4G band range by the effect of parasitic coupling.
The antenna system described in this embodiment supports full-band coverage of 0.7-0.96GHz and 1.71-2.69GHz in existing 4G cellular networks.
Optionally, the second gap 8 is disposed between the USB interface of the mobile terminal and the SIM card socket module.
Considering that the SIM card holder module in the prior art penetrates through the metal middle frame and the system from top to bottom, and occupies a large amount of XY space, the second gap 8 is disposed between the USB interface 4 and the SIM card holder module 5 in this embodiment, so as to meet the requirement of the stack design of the mobile terminal.
Optionally, the metal connecting sheet is suspended on the circuit board and has a height greater than or equal to 0.5 mm.
Optionally, as shown in fig. 2, the impedance matching unit 14 includes a first inductor L1, one end of the first inductor L1 is grounded, and the other end of the first inductor L1 is connected to the feeding point 11 of the metal connecting pad and connected to the rf transceiver module.
The radio frequency transceiving module can be used for receiving and transmitting information or receiving and transmitting signals in the conversation process. By arranging the impedance matching unit, the feed point of the terminal antenna system is impedance matched to 50 ohms.
Optionally, the frequency modulation unit of this embodiment is an aperture tuning switch network, which can overcome the problem caused by the reduction of the antenna area and efficiency.
As shown in fig. 2, the aperture tuning switch network 15 includes an aperture tuning switch TS, a second inductor L2, a third inductor L3, and a fourth inductor L4, the aperture tuning switch TS is a four-pole switch, one end of the second inductor L2, one end of the third inductor L3, and one end of the fourth inductor L4 are respectively connected to three ends of the aperture tuning switch TS, and the other end of the second inductor L2, the other end of the third inductor L3, and the other end of the fourth inductor L4 are connected to the contact point 12 of the metal connecting plate.
The metal connecting sheet of the embodiment may be a metal pattern layer.
Further, in this embodiment, when the aperture tuning switch network is switched to the first working state, the antenna system covers 705-805MHz, 1710-1920MHz, and 2500-2690 MHz;
when the aperture tuning switch network is switched to the second working state, the antenna system covers 790-894MHz, 1800-1920MHz and 2500-2690 MHz;
when the aperture tuning switch network is switched to the third working state, the antenna system covers 880-960MHz, 1920-2170MHz and 2300-2400 MHz.
Optionally, the widths of the first gap and the second gap are greater than or equal to 0.5 mm.
Fig. 3 is a diagram illustrating the antenna efficiency of the antenna system according to this embodiment. The dotted line represents the radiation efficiency of the aperture tuning switch network in three working states, the other solid lines represent the total efficiency of the aperture tuning switch network in three working states, the low-frequency peak efficiency and the medium-high frequency peak efficiency of each frequency covered by resonance are respectively more than-8 dB and more than-5 dB, and the antenna performance requirement of a common mobile terminal can be met.
The antenna system described in this embodiment can completely cover the full frequency bands of 0.7-0.96GHz and 1.71-2.69GHz in the existing 4G cellular network.
Can satisfy antenna body radiation length's under the complicated terminal product piles up the environment demand through setting up metal connecting piece, through the size of adjustment metal connecting piece, can be applicable to the antenna environment that the compactness worsens day by day in a flexible way, the antenna system that the contrast was realized only with the metal center more possesses the flexibility.
Example 2:
the present embodiment provides a mobile terminal including the terminal antenna system according to embodiment 1 of the present invention.
In the embodiment, the terminal antenna can satisfy the frequency band requirement of the 4G antenna and the frequency band requirement of the 5G antenna, so as to effectively utilize the space of the mobile terminal and solve the problem of insufficient space of the mobile terminal.
In light of the foregoing description of the preferred embodiments according to the present application, it is to be understood that various changes and modifications may be made without departing from the spirit and scope of the invention. The technical scope of the present application is not limited to the contents of the specification, and must be determined according to the scope of the claims.
Claims (9)
1. The utility model provides a terminal antenna system, includes the metal center, be located system ground in the metal center and with the circuit board of system ground electricity connection, be provided with frequency modulation unit and impedance matching unit on the circuit board, the bottom of metal center sets up first gap and second gap, first gap and second gap are filled with non-conductive material, the first metal section of first gap one side forms first antenna element, the second metal section between first gap and the second gap forms second antenna element, its characterized in that:
the terminal antenna system further comprises a metal connecting sheet, the metal connecting sheet is suspended above the circuit board, a feeding point, a contact point and a lap joint point are arranged on the metal connecting sheet, and the metal connecting sheet forms a third antenna unit;
the impedance matching unit is connected with a feed point of the metal connecting sheet, the frequency modulation unit is connected with a contact point of the metal connecting sheet, a lap joint of the metal connecting sheet is connected with a second metal section, the metal connecting sheet and the second metal section form a main radiation arm of the terminal antenna system to realize low frequency and medium frequency in a 4G frequency range, and the first metal section forms a parasitic radiation arm of the terminal antenna system to realize high frequency in the 4G frequency range;
the second gap is arranged between the USB interface of the mobile terminal and the SIM card holder module.
2. The terminal antenna system of claim 1, wherein the first metal segment has a ground point disposed thereon, and the first metal segment is connected to a system ground via the ground point; the second metal segment is positioned between the first gap and the second gap and suspended in the system ground.
3. The terminal antenna system of claim 1, wherein the metal connecting strip is suspended above the circuit board by a height of 0.5mm or more.
4. The terminal antenna system of claim 1, wherein the impedance matching unit comprises a first inductor, one end of the first inductor is grounded, and the other end of the first inductor is connected to the feeding point of the metal connecting piece and connected to the radio frequency transceiver module.
5. The terminal antenna system of claim 1, wherein the frequency tuning unit is an aperture tuning switch network.
6. The terminal antenna system of claim 5, wherein the aperture tuning switch network comprises an aperture tuning switch, a second inductor, a third inductor and a fourth inductor, the aperture tuning switch is a four-pole switch, one end of the second inductor, one end of the third inductor and one end of the fourth inductor are respectively and correspondingly connected with three ends of the aperture tuning switch, and the other ends of the second inductor, the third inductor and the fourth inductor are connected with the contact point of the metal connecting sheet.
7. A terminal antenna system according to claim 5, characterized in that the antenna system covers 705 MHz-805 MHz, 1710 MHz-1920 MHz and 2500 MHz-2690 MHz when the aperture tuning switch network is in the first operational state;
when the aperture tuning switch network is in a second working state, the antenna system covers 790 MHz-894 MHz, 1800 MHz-1920 MHz and 2500 MHz-2690 MHz;
when the aperture tuning switch network is in a third working state, the antenna system covers 880 MHz-960 MHz, 1920 MHz-2170 MHz and 2300 MHz-2400 MHz.
8. The terminal antenna system of claim 1, wherein the width of the first slot and the second slot is greater than or equal to 0.5 mm.
9. A mobile terminal, characterized in that it comprises a terminal antenna system according to any of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010494619.8A CN111816983B (en) | 2020-06-03 | 2020-06-03 | Terminal antenna system and mobile terminal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010494619.8A CN111816983B (en) | 2020-06-03 | 2020-06-03 | Terminal antenna system and mobile terminal |
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| CN111816983A CN111816983A (en) | 2020-10-23 |
| CN111816983B true CN111816983B (en) | 2022-06-10 |
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| CN104681929A (en) * | 2013-11-30 | 2015-06-03 | 深圳富泰宏精密工业有限公司 | Antenna structure and wireless communication device with antenna structure |
| CN107453024A (en) * | 2017-07-14 | 2017-12-08 | 瑞声声学科技(苏州)有限公司 | Antenna system and communication apparatus |
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| US9160056B2 (en) * | 2010-04-01 | 2015-10-13 | Apple Inc. | Multiband antennas formed from bezel bands with gaps |
| CN203398262U (en) * | 2013-07-25 | 2014-01-15 | 上海安费诺永亿通讯电子有限公司 | Novel LTE metal-frame antenna with ultra wide band |
| CN106972254B (en) * | 2016-09-22 | 2020-05-15 | 瑞声科技(新加坡)有限公司 | Mobile terminal |
| CN106898859A (en) * | 2017-01-19 | 2017-06-27 | 瑞声科技(新加坡)有限公司 | Antenna and mobile terminal |
| BR112019019396A2 (en) * | 2017-03-20 | 2020-04-14 | Huawei Tech Co Ltd | mobile terminal and mobile terminal antenna |
| CN108963429A (en) * | 2018-08-26 | 2018-12-07 | 昆山亿趣信息技术研究院有限公司 | A kind of antenna structure of large-size screen monitors all-metal frame mobile phone |
| CN109742512A (en) * | 2018-12-24 | 2019-05-10 | 瑞声科技（南京）有限公司 | Antenna modules and mobile terminal |
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| CN104681929A (en) * | 2013-11-30 | 2015-06-03 | 深圳富泰宏精密工业有限公司 | Antenna structure and wireless communication device with antenna structure |
| CN107453024A (en) * | 2017-07-14 | 2017-12-08 | 瑞声声学科技(苏州)有限公司 | Antenna system and communication apparatus |
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Denomination of invention: A terminal antenna system and mobile terminal Effective date of registration: 20230816 Granted publication date: 20220610 Pledgee: Suzhou Trust Co.,Ltd. Pledgor: KUNSHAN RUIXIANG XUNTONG COMMUNICATION TECHNOLOGY Co.,Ltd. Registration number: Y2023980052317 |
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Address after: 215300 Room 009, No. 55, Shengchuang Road, Yushan Town, Kunshan, Suzhou, Jiangsu Province Patentee after: KUNSHAN RUIXIANG XUNTONG COMMUNICATION TECHNOLOGY Co.,Ltd. Country or region after: China Address before: 215300 no.1689-5 Zizhu Road, Yushan Town, Kunshan City, Suzhou City, Jiangsu Province Patentee before: KUNSHAN RUIXIANG XUNTONG COMMUNICATION TECHNOLOGY Co.,Ltd. Country or region before: China |