CN204333220U - Mobile phone mimo antenna structure - Google Patents
Mobile phone mimo antenna structure Download PDFInfo
- Publication number
- CN204333220U CN204333220U CN201420696062.6U CN201420696062U CN204333220U CN 204333220 U CN204333220 U CN 204333220U CN 201420696062 U CN201420696062 U CN 201420696062U CN 204333220 U CN204333220 U CN 204333220U
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- antenna
- cell phone
- mobile phone
- metalwork
- phone mainboard
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Abstract
The utility model provides a kind of mobile phone mimo antenna structure, comprise at least two antennas, as wherein first antenna reference ground cell phone mainboard and as wherein second antenna reference ground metalwork, described second antenna is located on a metalwork, described metalwork is fixed relative to described cell phone mainboard position, described first antenna is connected on a lateral edges of described cell phone mainboard, and described second antenna is positioned at the opposite side edge of described cell phone mainboard.In the utility model, first antenna is using cell phone mainboard as the reference of antenna ground, and the second antenna is using metalwork as the reference of antenna ground, because the first antenna and the second antenna have different reference ground respectively, current coupling reduces, therefore the isolation of mimo antenna increases.On this basis, also by realizing the adjustable of the working band of the second antenna to the further configuration of metalwork.
Description
Technical field
The utility model relates to mimo system, particularly relates to a kind of mobile phone mimo antenna structure.
Background technology
Along with the fast development of radio communication, consumer to the speed of transfer of data and the requirement of quality more and more higher, the thing followed is the high-speed mobile broadband era, and make when 3G technology waits to improve, LTE (Long Term Evolution) and 4G head-on attacks.Proposed in 1908 by Marconi, the nineties in 20th century completes MIMO (Multiple-Input Multiple-Output, multiple-input and multiple-output) technology one of core technology being considered to LTE and 4G system widely of its work of laying a foundation by AT & T Bell laboratory scholar.
Multipath transmisstion is considered as a kind of unfavorable factor in signal propagation by traditional communication theory always, and the MIMO technology of in recent years rising, propose to arrange how secondary transmitting antenna and how secondary reception antenna at transmitting terminal and receiving terminal respectively, then can utilize the multipath transmisstion in wireless communication system, improve the performance of system.Mimo antenna, as the important devices in mimo system, has very important effect.Mobile phone, as the terminal equipment in mobile communication system, must also need to be equipped with multiple stand-alone antenna.
In mobile phone, design mimo antenna, its difficult point is that the space that can be used for placing antenna in mobile phone is less, and be difficult to ensure that antenna has good isolation, particularly at low-frequency range 700MHz ~ 960MHz, isolation between antennas is often poor.
The existing method improving isolation between antennas has: 1, floor fluting, but this method can destroy the mainboard of mobile phone, affects other performances of mobile phone; 2, in adopting and line technology, as floor loads detail etc., but this method can make antenna take up room increase; 3, optimize the placement location of antenna, the improvement of this method to isolation between antennas is less.Above several method has a common drawback, all can only improve the isolation of mimo antenna in narrower frequency band.
Utility model content
The technical problems to be solved in the utility model how in wider frequency band, to improve mimo antenna isolation.
In order to solve this technical problem, the utility model provides a kind of mobile phone mimo antenna structure, comprise at least two antennas, as wherein first antenna reference ground cell phone mainboard and as wherein second antenna reference ground metalwork, described second antenna is located on a metalwork, described metalwork is fixed relative to described cell phone mainboard position, described first antenna is connected on a lateral edges of described cell phone mainboard, and described second antenna is positioned at the opposite side edge of described cell phone mainboard.
Described becket is connected to the surface of described cell phone mainboard.
Described becket is open ring structure, and the two ends of opening are connected to the surface of described cell phone mainboard respectively by a sheet metal.
The position at the two ends near opening on described becket is respectively equipped with an adjustable device, and the working band of described second antenna is regulated by described adjustable device.Described adjustable device is chosen as tunable capacitor.
Described becket passes through the support installing of a dielectric material on described cell phone mainboard, and the working band of the length of described becket and described second antenna matches.
Described metalwork is perpendicular to the surface of described cell phone mainboard.
The working band of described first antenna is 700MHz ~ 960MHz.Also can add other structures makes it be operated in multiple frequency range.
Described cell phone mainboard is rectangle, and widthwise edges is located at by described first antenna, and described second antenna and metalwork are located at length edge.
Described metalwork is axially symmetric structure, and the distributing point of described second antenna is positioned on symmetry axis.
Described first antenna comprises and metallic member and grounded part, described metallic member is connect by distributing point distributing point and described cell phone mainboard, described grounded part is connected with described cell phone mainboard by earth point, described metallic member is rectangle structure, outside two length edges that described grounded part is surrounded on described grounded part and a widthwise edges.
In the utility model, first antenna is using cell phone mainboard as the reference of antenna ground, and the second antenna is using metalwork as the reference of antenna ground, because the first antenna and the second antenna have different reference ground respectively, current coupling reduces, therefore the isolation of mimo antenna increases.On this basis, also by realizing the adjustable of the working band of the second antenna to the further configuration of metalwork.
Accompanying drawing explanation
Fig. 1 is the structural representation of mobile phone mimo antenna structure in the utility model one embodiment;
Fig. 2 and Fig. 3 is the connection diagram of the first antenna in the utility model one embodiment;
Fig. 4 and Fig. 5 is the connection diagram of the second antenna and becket in the utility model one embodiment;
Fig. 6 is the schematic diagram of becket in the utility model one embodiment;
Effect schematic diagram when Fig. 7, Fig. 8 are becket ground connection in the utility model one embodiment;
Fig. 9 to Figure 11 is effect schematic diagram when becket is earth-free in another embodiment of the utility model;
In figure, 1-first antenna; 11-metallic member; 12-grounded part; 13-connecting portion; 14-distributing point; 15-earth point; 2-second antenna; 21-distributing point; 3-becket; 31-tunable capacitor; 32-sheet metal; 4-cell phone mainboard.
Embodiment
Below with reference to Fig. 1 to Figure 11, the mobile phone mimo antenna structure that the utility model provides is described in detail, it is the utility model one optional embodiment, can think, those skilled in the art, in the scope not changing the utility model spirit and content, can modify to it and polish.
Please refer to Fig. 1, present embodiments provide a kind of mobile phone mimo antenna structure, comprise at least two antennas, comprising the first antenna 1 and the second antenna 2, antenna of the present utility model is not limited to be operated in 700MHz ~ 960MHz, also can add other structures and make it be operated in multiple frequency range.
This mobile phone mimo antenna structure also comprises as described first antenna 1 with reference to the cell phone mainboard 4 on ground and as the metalwork of described second antenna 2 with reference to ground, described second antenna 2 is located on a metalwork, described metalwork is fixed relative to described cell phone mainboard 4 position, described first antenna 1 is connected on a lateral edges of described cell phone mainboard 4, and described second antenna 2 is positioned at the opposite side edge of described cell phone mainboard 4.Described metalwork is the becket 3 of ring-type, and described becket 3 is connected to the surface of described cell phone mainboard 4.The structure of ring-type can make up with reference to ground Len req.
The reason that in mobile phone, mimo antenna is difficult to design often makes two antenna public floors when being design mimo antenna, causes current coupling on floor serious, makes mimo antenna isolation poor.In the utility model, first antenna 1 is using cell phone mainboard 4 as the reference of antenna ground, and the second antenna 2 is using becket 3 as the reference of antenna ground, and the first antenna 1 and the second antenna 2 have different reference ground respectively, current coupling reduces, therefore the isolation of mimo antenna increases.In the present embodiment, the second antenna 2 only takies 8mm space along the Width of mainboard, reduces taking up room of antenna, achieves the miniaturization of antenna.In the present embodiment, described cell phone mainboard is rectangle, and widthwise edges is located at by described first antenna 1, and described second antenna 2 and metalwork are located at length edge.
About described first antenna:
Please refer to Fig. 2 and Fig. 3, in the present embodiment, first antenna adopts couple feed, distributing point 14 and earth point 15 are all connected on described cell phone mainboard 4, specifically, described first antenna 1 at least comprises and metallic member 11 and grounded part 12, described metallic member 11 is connected with described cell phone mainboard 4 by distributing point 14, described grounded part 12 is connected with described cell phone mainboard 4 by earth point 15, further, metallic member 11 and grounded part 12 are connected to distributing point 14 and earth point 15 respectively by connecting portion 13, and then be connected with described cell phone mainboard 4, described metallic member 11 is rectangle structure, outside two length edges that described grounded part 12 is surrounded on described metallic member 11 and a widthwise edges.Also can be regarded as: the metallic member 11 that the first antenna 1 is connected with distributing point 14 has larger width, and be grounded part 12 and surround completely.The working band of antenna is 700MHz ~ 960MHz.Certainly, the structure of the first antenna, connected mode and working band are not limited to enumerating of the present embodiment.
About described becket 3:
In the utility model one optional embodiment, please refer to Fig. 4 to Fig. 6, described becket 3 is connected to the surface of described cell phone mainboard 4.Described becket 3 is open ring structure, and the two ends of opening are connected to the surface of described cell phone mainboard 4 respectively by a sheet metal 32.The position at the two ends near opening on described becket 3 is respectively equipped with an adjustable device, the working band of described second antenna 2 is regulated by described adjustable device, in the present embodiment, adjustable device adopts tunable capacitor 31, and it also can be the network that inductance or the element such as electric capacity, inductance are formed.Certainly, be not limited to be becket 3 to the reference of the second antenna 2, also can adopt other structures.Whether whether whether the second antenna 2 is also not limited to be connected with cell phone mainboard with reference to ground, as long as play corresponding with reference to ground effect, no matter be ring-type, be connected, all can regard as equivalent technologies means of the present utility model with mainboard.Tunable capacitor on becket 3 can regulate the working frequency range of antenna.In the present embodiment, tunable capacitor is contained in reference on the ground, but not on antenna.
In the connection of becket 3 and the second antenna 2, the distributing point 33 of described second antenna 2 is connected on described becket 3, and this distributing point 21 is preferably the point midway of becket 3, furthermore, described metalwork is axially symmetric structure, and the distributing point 21 of described second antenna 2 is positioned on symmetry axis.Also can be described as, the reference ground of the second antenna 2 is a metal structure, the preferably metal structure of a symmetry, and the distributing point 21 of the second antenna 2 is positioned at the symmetric points place with reference to ground.At described becket 3 with in the connection of described cell phone mainboard 4, the two ends of described becket 3 opening part are provided with two sheet metals 32, and described becket 3 is connected on described cell phone mainboard 4 by described sheet metal 32.
Please refer to Fig. 7, Fig. 8, in this example during becket 3 ground connection, when the tunable capacitor scope on becket 3 is 0.1pF ~ 12pF, the S parameter of antenna.By regulating the tunable capacitor on becket, Antenna Operation frequency range can cover 700MHz ~ 960MHz.In Fig. 7, tunable capacitor is 12pF, and Antenna Operation is at 700MHz; In Fig. 8, tunable capacitor is 0.1pF, and Antenna Operation is at 960MHz.In the present embodiment, becket is connected with floor, and mimo antenna isolation, within the scope of 700MHz ~ 960MHz, is less than-10dB, and antenna 2 working range is dynamically adjustable.
In another optional embodiment of the utility model, if becket is not connected with floor, then do not need to load tunable capacitor, use a dielectric material to be positioned over support as becket on floor.In other words, now do not need to add tunable capacitor, adopt dielectric material to replace sheet metal, becket is not directly connected with floor, regulate the length of becket can regulate the working frequency range of the second antenna.
Described becket 3 passes through the support installing of a dielectric material on described cell phone mainboard 4, and the working band of the length of described becket 3 and described second antenna 2 matches.In other words, the becket of configuration different length, can realize the second antenna 2 of different frequency bands, thus can improve mimo antenna isolation at different frequency bands, and then can improve mimo antenna isolation in wider frequency band.
Please refer to Fig. 9 to Figure 11, in Fig. 9, becket 3 length l=60mm, the second antenna 2 is operated in 960MHz, Tu10Zhong, becket 3 length l=90mm, and the second antenna 2 is operated in 850MHz; In Figure 11, becket 3 length l=120mm, the second antenna 2 is operated in 700MHz.Becket 3 is not connected with floor, and mimo antenna isolation, within the scope of 700MHz ~ 960MHz, is less than-15dB, and antenna 2 working range can only be regulated by the length of becket.
In sum, in the utility model, the first antenna is using cell phone mainboard as the reference of antenna ground, and the second antenna is using metalwork as the reference of antenna ground, because the first antenna and the second antenna have different reference ground respectively, current coupling reduces, therefore the isolation of mimo antenna increases.On this basis, also by realizing the adjustable of the working band of the second antenna to the further configuration of metalwork.Provide adjustable mimo antenna in the utility model, for improving the isolation of 700MHz ~ 960MHz mimo antenna, while loading tunable capacitor, the working frequency range of mimo antenna can cover 700MHz ~ 960MHz.
Claims (11)
1. a mobile phone mimo antenna structure, it is characterized in that: comprise at least two antennas, as wherein first antenna reference ground cell phone mainboard and as wherein second antenna reference ground metalwork, described second antenna is located on described metalwork, described metalwork is fixed relative to described cell phone mainboard position, described first antenna is connected on a lateral edges of described cell phone mainboard, and described second antenna is positioned at the opposite side edge of described cell phone mainboard.
2. mobile phone mimo antenna structure as claimed in claim 1, is characterized in that: described metalwork is the becket of ring-type, and described becket is connected to the surface of described cell phone mainboard.
3. mobile phone mimo antenna structure as claimed in claim 2, is characterized in that: described becket is open ring structure, and the two ends of opening are connected to the surface of described cell phone mainboard respectively by a sheet metal.
4. mobile phone mimo antenna structure as claimed in claim 3, is characterized in that: the position at the two ends near opening on described becket is respectively equipped with an adjustable device, and the working band of described second antenna is regulated by described adjustable device.
5. mobile phone mimo antenna structure as claimed in claim 4, is characterized in that: described adjustable device is tunable capacitor.
6. mobile phone mimo antenna structure as claimed in claim 2, is characterized in that: described becket passes through the support installing of a dielectric material on described cell phone mainboard, and the working band of the length of described becket and described second antenna matches.
7. mobile phone mimo antenna structure as claimed in claim 1, is characterized in that: described metalwork is perpendicular to the surface of described cell phone mainboard.
8. mobile phone mimo antenna structure as claimed in claim 1, is characterized in that: the working band of described first antenna is 700MHz ~ 960MHz.
9. mobile phone mimo antenna structure as claimed in claim 1, it is characterized in that: described cell phone mainboard is rectangle, widthwise edges is located at by described first antenna, and described second antenna and metalwork are located at length edge.
10. mobile phone mimo antenna structure as claimed in claim 1, it is characterized in that: described metalwork is axially symmetric structure, the distributing point of described second antenna is positioned on symmetry axis.
11. mobile phone mimo antenna structures as claimed in claim 1, it is characterized in that: described first antenna comprises and metallic member and grounded part, described metallic member is connect by distributing point and described cell phone mainboard, described grounded part is connected with described cell phone mainboard by earth point, described metallic member is rectangle structure, outside two length edges that described grounded part is surrounded on described grounded part and a widthwise edges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420696062.6U CN204333220U (en) | 2014-11-19 | 2014-11-19 | Mobile phone mimo antenna structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420696062.6U CN204333220U (en) | 2014-11-19 | 2014-11-19 | Mobile phone mimo antenna structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204333220U true CN204333220U (en) | 2015-05-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420696062.6U Withdrawn - After Issue CN204333220U (en) | 2014-11-19 | 2014-11-19 | Mobile phone mimo antenna structure |
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| CN (1) | CN204333220U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332696B (en) * | 2014-11-19 | 2017-03-29 | 上海安费诺永亿通讯电子有限公司 | Mobile phone mimo antenna structure |
| CN107356811A (en) * | 2017-07-28 | 2017-11-17 | 昆山龙腾光电有限公司 | Power consumption test system |
| CN108565543A (en) * | 2018-01-18 | 2018-09-21 | 深圳市信维通信股份有限公司 | MIMO antenna structure and handheld device with the MIMO antenna structure |
| CN110121815A (en) * | 2016-12-27 | 2019-08-13 | 株式会社村田制作所 | Antenna assembly |
| CN114944549A (en) * | 2022-05-20 | 2022-08-26 | 显踪电子(苏州)有限公司 | Ultra-wideband communication omni-directional stable antenna unit, antenna array and antenna |
-
2014
- 2014-11-19 CN CN201420696062.6U patent/CN204333220U/en not_active Withdrawn - After Issue
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332696B (en) * | 2014-11-19 | 2017-03-29 | 上海安费诺永亿通讯电子有限公司 | Mobile phone mimo antenna structure |
| CN110121815A (en) * | 2016-12-27 | 2019-08-13 | 株式会社村田制作所 | Antenna assembly |
| CN110121815B (en) * | 2016-12-27 | 2021-04-16 | 株式会社村田制作所 | Antenna device |
| CN107356811A (en) * | 2017-07-28 | 2017-11-17 | 昆山龙腾光电有限公司 | Power consumption test system |
| CN108565543A (en) * | 2018-01-18 | 2018-09-21 | 深圳市信维通信股份有限公司 | MIMO antenna structure and handheld device with the MIMO antenna structure |
| CN108565543B (en) * | 2018-01-18 | 2023-10-17 | 深圳市信维通信股份有限公司 | MIMO antenna structure and handheld device with same |
| CN114944549A (en) * | 2022-05-20 | 2022-08-26 | 显踪电子(苏州)有限公司 | Ultra-wideband communication omni-directional stable antenna unit, antenna array and antenna |
| CN114944549B (en) * | 2022-05-20 | 2024-02-13 | 显踪电子(苏州)有限公司 | Ultra-wideband communication omnidirectional stable antenna unit, antenna array and antenna |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150513 Effective date of abandoning: 20170329 |