CN203521614U - High-isolation MIMO antenna - Google Patents
High-isolation MIMO antenna Download PDFInfo
- Publication number
- CN203521614U CN203521614U CN201320695767.1U CN201320695767U CN203521614U CN 203521614 U CN203521614 U CN 203521614U CN 201320695767 U CN201320695767 U CN 201320695767U CN 203521614 U CN203521614 U CN 203521614U
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- antenna
- microstrip line
- antennas
- isolation
- mimo
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Abstract
The utility model discloses a high-isolation MIMO antenna. The antenna comprises a PCB and a plurality of antennas arranged at the top end of the PCB and respectively used for supporting different service signals. A side, adjacent to other antennas, of each antenna is provided with a cancellation micro-strip line shaped to correspond to the side of the antenna, and the end of the cancellation micro-strip line is connected with the ground on the PCB. A balanced micro-strip line is arranged between every two adjacent cancellation micro-strip lines, and the two ends of each balanced micro-strip line are respectively connected with the two corresponding cancellation micro-strip lines. By adding the micro-strip lines between the antennas, the degree of isolation between two antennas can be effectively improved, and the problem of interference between antennas in a MIMO multi-antenna system is solved.
Description
Technical field
The utility model relates to the MIMO antenna using in the equipment such as a kind of mobile phone, wireless access.
Background technology
Multiple-input, multiple-output (MIMO) or MIMO antenna technology are the important breakthroughs of wireless mobile communications field antenna technology.This technology can improve exponentially capacity and the availability of frequency spectrum of communication system in the situation that not increasing bandwidth, is the key technology that the third generation mobile communication system must adopt.MIMO technology allows a plurality of antennas a plurality of spatial flows of sending and receiving simultaneously, and can distinguish and mail to or from the signal in different spaces orientation.The application of multiaerial system can transmit parallel data flow simultaneously.Meanwhile, at transmitting terminal or receiving terminal, adopt many antennas, can significantly overcome the decline of channel, reduce the error rate.
But in terminal equipment, especially handheld terminal is subject to the restriction of product appearance and size, the realization of many antennas in end product has certain difficulty.In order to solve this technical barrier, traditional layout is to try one's best far in the position that antenna is put, and the isolation of antenna is enough large, and layout is the effect that can reach certain like this.But end product is more and more higher to appearance requirement at present, the miniaturization of product has become following inevitable trend.This just defines impossible place very desirable of distance between antenna, and the isolation of antenna can not meet the demands.Because the physical distance between antenna and antenna is very near, inevitably there is the disturbed condition between antenna and antenna.How under less physical size, realizing multiaerial system is a current difficult point.
Summary of the invention
The problem that the utility model need solve is to provide a kind of can under less bulk, use, have high-isolation, function admirable MIMO antenna.
The technical scheme that the utility model adopts is: a kind of MIMO antenna of high-isolation, comprises pcb board and be located at some strip antennas that pcb board top is respectively used to support different business signal; The side that each antenna is adjacent with other antenna be equipped with a strip and antenna self side edge shape corresponding offset microstrip line, described in offset the ground on the connecting PCB board of microstrip line termination.
Preferably, every adjacent two offset and between microstrip line, are provided with a balance microstrip line, and described balance microstrip line two ends offset microstrip line and connect with corresponding two respectively.
Concrete, described antenna is monopole antenna.
Concrete, described antenna is respectively equipped with distributing point, and each antenna is respectively by the feed circuit on distributing point connecting PCB board.
The utility model can effectively improve the isolation between two antennas by the mode increasing microstrip line between antenna, solved inter-antenna interference problem in MIMO multiaerial system, for the application of MIMO multi-antenna technology in the Miniature Terminal equipment such as mobile phone, wireless access laid a good foundation.
accompanying drawing explanation
Fig. 1 is the example structure schematic diagram of MIMO antenna described in the utility model;
Fig. 2 does not increase the isolation curve chart while offseting microstrip line in Fig. 1 embodiment antenna;
Fig. 3 is middle MIMO antenna embodiment illustrated in fig. 1 (increased and offseted microstrip line) isolation curve chart.
Embodiment
For convenience of those skilled in the art, understand technology contents of the present utility model, below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail.
The antenna of MIMO described in the present embodiment is to be a 140mm*60mm of being of a size of, and is operated in LTE frequency range, the design of Fixed Wireless Terminal Device of support MIMO technology.This wireless access terminal requires to provide speech business and data transmission service simultaneously, because speech business and data transmission service are between different functional modules, but be operated in same frequency range, inevitably brought the problem of disturbing mutually between two or more antennas of realizing voice-and-data transport service.
If Fig. 1 Fig. 1 is the example structure schematic diagram of MIMO antenna described in the utility model;
Fig. 2 does not increase the isolation curve chart while offseting microstrip line in Fig. 1 embodiment antenna;
Fig. 3 is middle MIMO antenna embodiment illustrated in fig. 1 (increased and offseted microstrip line) isolation curve chart.
Embodiment
For convenience of those skilled in the art, understand technology contents of the present utility model, below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail.
The antenna of MIMO described in the present embodiment is to be a 140mm*60mm of being of a size of, and is operated in LTE frequency range, the design of Fixed Wireless Terminal Device of support MIMO technology.This wireless access terminal requires to provide speech business and data transmission service simultaneously, because speech business and data transmission service are between different functional modules, but be operated in same frequency range, inevitably brought the problem of disturbing mutually between two or more antennas of realizing voice-and-data transport service.
On Fig. 1, be then attached on support, then be electrically connected on the ground and feed circuit of pcb board.
If do not added, do not offset microstrip line and balance microstrip line, when antenna uses, between the distributing point 5 of two antennas, will form very strong couple current, this just causes two isolations between close antenna poor, and disturbing mutually between antenna is more serious.Take 824Mhz as example, do not adding while offseting microstrip line, the isolation between actual test antenna 1 and antenna 2 is-9.2dB obviously not meet the demands.And add, offset after microstrip line, the reach-18.4dB of isolation between two antennas has promoted 9dB left and right on basis before, substantially meets the requirement of isolation.Comparison diagram as shown in Figure 2,3.
In the utility model, increase the mode that offsets microstrip line and balance microstrip line, not only be applicable to be operated in a plurality of antennas of same frequency range, also be applicable to be operated in a plurality of antennas within the scope of different frequency range, can be by reserving antenna match, feed placement on pcb board, offseting microstrip line length, the impedance bandwidth of antenna is adjusted in balanced line positions etc.
It should be noted that, described in the utility model, wireless device includes but not limited to mobile phone, also can be applied in all places that can apply this antenna technology such as wireless access.
The part that the utility model is not specifically introduced, all can adopt the common technology means of this area, is not repeated herein.
These are only specific embodiment of the utility model; in the utility model design situation that do not come off; offset any modification of doing the aspects such as microstrip line length, balance microstrip line position, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.
Claims (4)
1. a MIMO antenna for high-isolation, comprises pcb board and is located at some strip antennas that pcb board top is respectively used to support different business signal; It is characterized in that, the side that each antenna is adjacent with other antenna be equipped with a strip and antenna self side edge shape corresponding offset microstrip line, described in offset the ground on the connecting PCB board of microstrip line termination.
2. the MIMO antenna of high-isolation according to claim 1, is characterized in that, every adjacent two offset and between microstrip line, are provided with a balance microstrip line, and described balance microstrip line two ends offset microstrip line and connect with corresponding two respectively.
3. the MIMO antenna of high-isolation according to claim 1, is characterized in that, described antenna is monopole antenna.
4. the MIMO antenna of high-isolation according to claim 1, is characterized in that, described antenna is respectively equipped with distributing point, and each antenna is respectively by the feed circuit on distributing point connecting PCB board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320695767.1U CN203521614U (en) | 2013-11-06 | 2013-11-06 | High-isolation MIMO antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320695767.1U CN203521614U (en) | 2013-11-06 | 2013-11-06 | High-isolation MIMO antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203521614U true CN203521614U (en) | 2014-04-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320695767.1U Expired - Fee Related CN203521614U (en) | 2013-11-06 | 2013-11-06 | High-isolation MIMO antenna |
Country Status (1)
| Country | Link |
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| CN (1) | CN203521614U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103579758A (en) * | 2013-11-06 | 2014-02-12 | 惠州硕贝德无线科技股份有限公司 | High isolation MIMO antenna |
-
2013
- 2013-11-06 CN CN201320695767.1U patent/CN203521614U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103579758A (en) * | 2013-11-06 | 2014-02-12 | 惠州硕贝德无线科技股份有限公司 | High isolation MIMO antenna |
| CN103579758B (en) * | 2013-11-06 | 2016-06-08 | 惠州硕贝德无线科技股份有限公司 | A kind of mimo antenna of high-isolation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140402 Termination date: 20191106 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |