CN109659686A - A kind of high-isolation mimo antenna - Google Patents
A kind of high-isolation mimo antenna Download PDFInfo
- Publication number
- CN109659686A CN109659686A CN201910055614.2A CN201910055614A CN109659686A CN 109659686 A CN109659686 A CN 109659686A CN 201910055614 A CN201910055614 A CN 201910055614A CN 109659686 A CN109659686 A CN 109659686A
- Authority
- CN
- China
- Prior art keywords
- aerial radiation
- mimo antenna
- medium substrate
- decoupling network
- radiation end
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
Abstract
The invention discloses a kind of high-isolation mimo antennas, including medium substrate (1), at least two aerial radiation ends (2), filtering decoupling network (3) and earth plate, the one side of each aerial radiation end (2) and filtering decoupling network (3) setting in medium substrate (1), another side of the earth plate setting in medium substrate (1)；The filtering decoupling network (3) is connected to position between each aerial radiation end (2).The present invention is used for the antenna of intelligent terminal.
Description
Technical field
The present invention relates to antenna technical fields, and in particular to a kind of high-isolation mimo antenna.
Background technique
Mobile communication is one of Developing field the most quick, and mobile communication experienced several generations change, from mobile electricity
Unprecedented high efficiency and convenience, especially in mobile communication field, electromagnetic wave are provided to people in words, internet
Occur realizing wire communication developing by leaps and bounds to wireless communication, and present multimedia communication realizes single voice data
It is transmitted to integrated services data such as integrated image, data, audios.In recent years, with more and more terminal users and wirelessly
Data communication services, communication system provide broader band bandwidth, higher rate to wireless penetration, high speed, diversified demand
Data communication services, so that wireless communication system plays more and more important role in people's lives.
4G and 5G communication era, intelligent terminal become the main tool of people's online, and this requires intelligent terminals can be real
The data transmission of existing high reliability and high-speed.MIMO technique is the key technology for solving the problems, such as this, and
It is widely used in the base station end and mobile terminal of 4G communication.The characteristics of mimo system is in transmitter or receiver
In possess mutiple antennas, the multipath category of wireless channel can be utilized under the premise of not increasing transmission power and system spectrum
Property improve transmission quality and power system capacity.It must be not phase in order to make mimo system that there is preferable performance, between antenna element
(coupling is lower) closed, however, the space that can be reserved in mobile device for antenna is very limited, so that the sky between antenna
Between distance can not be more than or equal to a wavelength.Then multiple broad-band antennas with lower coupling are integrated in portable device
It is a comparison stubborn problem, the especially coupling in the reduction confined space between mutiple antennas.
Summary of the invention
Present invention solves the technical problem that being to provide a kind of lower MIMO days of coupling for the deficiency in background technique
Line.
In order to solve the above technical problems, the technical scheme is that a kind of high-isolation mimo antenna, including medium base
Plate, at least two aerial radiation ends, filtering decoupling network and earth plate, each aerial radiation end and filtering decoupling network setting
In the one side of medium substrate, the another side of medium substrate is arranged in the earth plate；The filtering decoupling network is connected to each day
Position between beta radiation end.
Further, the filtering decoupling network includes the first extension minor matters and semi-closed structure, each aerial radiation
End extends to form one first extension minor matters to position between each aerial radiation end respectively, and each described first extends minor matters seals from half
The opening for closing structure is extend into inside semi-closed structure, and multiple second are provided in the semi-closed structure and extends minor matters.
Further, the aerial radiation end is the monopole radiation patch being printed on medium substrate.
Further, the aerial radiation end is F shape metal patch.
Further, the earth plate is the metal patch being printed on medium substrate.
Further, the medium substrate be use dielectric constant for 4.4 ± 3% FR4 substrate.
Further, 50 ohm of feeding microstrip lines are connected at the feed point at the aerial radiation end.
Further, including two symmetrically arranged aerial radiation ends, the filtering decoupling network are arranged in two antennas
Between spoke side.
The beneficial effect that the present invention realizes mainly has the following: position setting filtering decoupling net between each aerial radiation end
Network reduces the electric wave of an aerial radiation by line absorption in other day, to reduce each by being filtered between the electric wave antenna
Intercoupling between a aerial radiation end improves the isolation at each aerial radiation end.
Detailed description of the invention
Fig. 1 is the positive structural schematic diagram of high-isolation mimo antenna in the embodiment of the present invention one；
Fig. 2 is high-isolation mimo antenna S parameter in the embodiment of the present invention one with frequency variation curve schematic diagram.
The attached figures are only used for illustrative purposes and cannot be understood as limitating the patent；In order to better illustrate this embodiment, attached
Scheme certain components to have omission, zoom in or out, does not represent the size of actual product；To those skilled in the art,
The omitting of some known structures and their instructions in the attached drawings are understandable；The same or similar label corresponds to same or similar
Component；The terms describing the positional relationship in the drawings are only for illustration, should not be understood as the limitation to this patent.
Specific embodiment
In order to facilitate the understanding of those skilled in the art, being carried out below in conjunction with attached drawing and embodiment to the present invention further
Detailed description.
Embodiment one
Refering to fig. 1, a kind of high-isolation mimo antenna, may be used as the antenna of the intelligent mobile terminals such as mobile phone.Mimo antenna packet
Include medium substrate 1, at least two aerial radiation ends 2, filtering decoupling network 3 and earth plate (not shown), each antenna
The one side of medium substrate 1 is arranged in spoke side 2 and filtering decoupling network 3, can be set in the front of medium substrate 1；It is described to connect
The another side of medium substrate 1 is arranged in floor, can be set at the back side of medium substrate 1.Mutiple antennas spoke side 2 forms MIMO
Antenna, filtering decoupling network 3 are connected to position between each aerial radiation end 2, by being filtered between the electric wave antenna, reduce
The electric wave of one aerial radiation was by line absorption in other day, to reduce intercoupling between each aerial radiation end 2, improved each
The isolation at a aerial radiation end.Filtering decoupling network 3 can be preferably provided using existing filter circuits such as LC, RC circuits
To realize, multiband filters multiple groups LC, RC filter circuit between aerial radiation end, so that the mimo antenna of the present embodiment is under wideband
Intercoupling for each frequency range can be reduced when radiation and reception, guarantees isolation of the antenna under wideband work.
Refering to fig. 1 with 2, preferably, the filtering decoupling network 3 is using such as flowering structure: extending minor matters 31 including first
With semi-closed structure 32, each aerial radiation end 2 extends to form one first to position between each aerial radiation end respectively and prolongs
Stretch minor matters 31, each first extension minor matters 31 from the opening of semi-closed structure 32 extend into 32 inside of semi-closed structure (not with
Semi-closed structure 32 is in contact), extend minor matters 31 for each other aerial radiation ends 2 of 2 radiation direction of aerial radiation end by first
Electric wave introduce filtering decoupling network 3 and to reduce electric wave of the aerial radiation to other antennas reduce each aerial radiation end
Coupling between 2 improves the isolation between aerial radiation end 2.It is provided with multiple second in the semi-closed structure 32 and extends branch
Save the filtering of 33, Lai Shixian multifrequency.
Refering to fig. 1 and Fig. 2, pass through the length that optimization first extends minor matters 31, second extends position, the length etc. of minor matters 33
Parameter, the antenna that the present embodiment may be implemented have preferable isolation in 1.8Ghz-3.1Ghz band operation, and Fig. 1 is excellent
Mimo antenna structural schematic diagram after change, the impedance band width of antenna are 1.86 GHz(1.24 GHz -3.10 GHz), day
The relative bandwidth of line is 42.9 %, which includes 1.9 GHz, Wi-Fi 2.4 of GSM in intelligent terminal communication
The frequency points such as 2.4 GHz of GHz, Bluetooth, FDD LTE 2.5-2.7 GHz.The greatest irradiation direction of antenna is plane normal direction
Both direction on, and uniform omnidirectional radiation can be made in both directions.Fig. 2 is with simulation software to entire MIMO days
Line emulate resulting S parameter with frequency variation curve schematic diagram, it can be seen from the figure that antenna structure is in frequency band 1.24
The degree of coupling in GHz~3.10GHz is below -19.2dB, can satisfy the requirement less than -15 dB required in engineering completely.
Two element antennas have uniform radiation characteristic on plane normal direction, and the radiation on main polarization direction is far longer than
Radiation on cross polarization direction, so two antennas all have good cross polarization isolation.
Refering to fig. 1, the aerial radiation end 2 is the monopole radiation patch being printed on medium substrate 1, the bandwidth of antenna
What can be done is wider, realizes the radiation and reception of 1.8GHz-3.1GHz frequency range.The aerial radiation end 2 is preferably with F shape gold
Belong to patch.The first of the filtering decoupling network 3 extends minor matters 31, semi-closed structure 32 and second extends minor matters 33 also using Jie
Metal patch structure on matter substrate 1, equally, the earth plate is the metal patch being printed on medium substrate 1, to be formed
One microstrip antenna.The medium substrate 1 be use dielectric constant for 4.4 ± 3% FR4 substrate.The aerial radiation end 2
50 ohm of feeding microstrip lines 4 are connected at feed point, the signal wire of the radiating system of the intelligent terminals such as mobile phone can be with two micro-strips
The feeding microstrip line of antenna is connected directly.
A kind of common mimo antenna, including two symmetrically arranged aerial radiation ends 2, two antennas are shown in Fig. 1
Spoke side can realize broadband radiation.The polarization mode of two monopole antennas is all linear polarization, and other of two antennas are special
Property is substantially the same.The filtering decoupling network 3 is arranged between two aerial radiation ends 2, adds between two aerial radiation ends
A filtering decoupling network is entered, has been similar to a broadband filter, antenna can have been reduced in specific frequency ranges of operation
Between coupling.More than two mutiple antennas spoke sides 2 also can be set as needed in practice, at each aerial radiation end
One filtering decoupling network 3 is set between 2.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this
Made any modifications, equivalent replacements, and improvements etc., should be included in the claims in the present invention within the spirit and principle of invention
Protection scope within.
Claims (8)
1. a kind of high-isolation mimo antenna, it is characterised in that: including medium substrate (1), at least two aerial radiation ends (2),
Decoupling network (3) and earth plate are filtered, each aerial radiation end (2) and filtering decoupling network (3) are arranged in medium substrate (1)
One side, another side of the earth plate setting in medium substrate (1)；The filtering decoupling network (3) is connected to each antenna spoke
Penetrate position between end (2).
2. high-isolation mimo antenna according to claim 1, it is characterised in that: the filtering decoupling network (3) includes
First extends minor matters (31) and semi-closed structure (32), and each aerial radiation end (2) is respectively to the meta position at each aerial radiation end
It sets and extends to form one first extension minor matters (31), each described first extends minor matters (31) stretches from the opening of semi-closed structure (32)
Enter to semi-closed structure (32) inside, the semi-closed structure (32) is interior to be provided with multiple second extensions minor matters (33).
3. high-isolation mimo antenna according to claim 1, it is characterised in that: the aerial radiation end (2) is printing
Monopole radiation patch on medium substrate (1).
4. high-isolation mimo antenna according to claim 3, it is characterised in that: the aerial radiation end (2) is F shape gold
Belong to patch.
5. high-isolation mimo antenna according to claim 1, it is characterised in that: the earth plate is to be printed on medium base
Metal patch on plate (1).
6. high-isolation mimo antenna according to claim 1, it is characterised in that: the medium substrate (1) is using Jie
The FR4 substrate that electric constant is 4.4 ± 3%.
7. high-isolation mimo antenna according to claim 1, it is characterised in that: the feed point of the aerial radiation end (2)
Place is connected with 50 ohm of feeding microstrip lines (4).
8. described in any item high-isolation mimo antennas according to claim 1 ~ 7, it is characterised in that: be symmetrical arranged including two
Aerial radiation end (2), the filtering decoupling network (3) is arranged between two aerial radiation ends (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910055614.2A CN109659686B (en) | 2019-01-22 | 2019-01-22 | High-isolation MIMO antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910055614.2A CN109659686B (en) | 2019-01-22 | 2019-01-22 | High-isolation MIMO antenna |
Publications (2)
| Publication Number | Publication Date |
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| CN109659686A true CN109659686A (en) | 2019-04-19 |
| CN109659686B CN109659686B (en) | 2023-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910055614.2A Active CN109659686B (en) | 2019-01-22 | 2019-01-22 | High-isolation MIMO antenna |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110233349A (en) * | 2019-04-24 | 2019-09-13 | 西安易朴通讯技术有限公司 | Multi-input/output antenna and terminal device |
| CN112332096A (en) * | 2020-10-29 | 2021-02-05 | 浙江海通通讯电子股份有限公司 | 5G terminal antenna |
| CN113517557A (en) * | 2020-04-10 | 2021-10-19 | 华为技术有限公司 | Electronic equipment |
| WO2021227813A1 (en) * | 2020-05-12 | 2021-11-18 | 西安电子科技大学 | Antenna apparatus and electronic device |
| CN113851839A (en) * | 2021-09-03 | 2021-12-28 | 荣耀终端有限公司 | High-isolation antenna device and terminal equipment |
| CN113851831A (en) * | 2021-08-26 | 2021-12-28 | 南京航空航天大学 | Miniaturized tightly-arranged MIMO antenna of 5G mobile terminal based on decoupling of patch capacitor |
| US11404774B2 (en) | 2020-01-31 | 2022-08-02 | Asustek Computer Inc. | Broadband dual antenna system |
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| KR100980774B1 (en) * | 2010-01-13 | 2010-09-10 | (주)가람솔루션 | Internal mimo antenna having isolation aid |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110233349A (en) * | 2019-04-24 | 2019-09-13 | 西安易朴通讯技术有限公司 | Multi-input/output antenna and terminal device |
| US11404774B2 (en) | 2020-01-31 | 2022-08-02 | Asustek Computer Inc. | Broadband dual antenna system |
| CN113517557A (en) * | 2020-04-10 | 2021-10-19 | 华为技术有限公司 | Electronic equipment |
| CN113517557B (en) * | 2020-04-10 | 2023-04-28 | 华为技术有限公司 | Electronic equipment |
| WO2021227813A1 (en) * | 2020-05-12 | 2021-11-18 | 西安电子科技大学 | Antenna apparatus and electronic device |
| CN112332096A (en) * | 2020-10-29 | 2021-02-05 | 浙江海通通讯电子股份有限公司 | 5G terminal antenna |
| CN113851831A (en) * | 2021-08-26 | 2021-12-28 | 南京航空航天大学 | Miniaturized tightly-arranged MIMO antenna of 5G mobile terminal based on decoupling of patch capacitor |
| CN113851831B (en) * | 2021-08-26 | 2022-07-26 | 南京航空航天大学 | Miniaturized tightly-arranged MIMO antenna of 5G mobile terminal based on decoupling of patch capacitor |
| CN113851839A (en) * | 2021-09-03 | 2021-12-28 | 荣耀终端有限公司 | High-isolation antenna device and terminal equipment |
| CN113851839B (en) * | 2021-09-03 | 2022-09-30 | 荣耀终端有限公司 | High-isolation antenna device and terminal equipment |
Also Published As
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| CN109659686B (en) | 2023-10-20 |
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