CN106876925A - A kind of mimo antenna based in rectangular channel with line - Google Patents
A kind of mimo antenna based in rectangular channel with line Download PDFInfo
- Publication number
- CN106876925A CN106876925A CN201510938556.XA CN201510938556A CN106876925A CN 106876925 A CN106876925 A CN 106876925A CN 201510938556 A CN201510938556 A CN 201510938556A CN 106876925 A CN106876925 A CN 106876925A
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- China
- Prior art keywords
- antenna
- line
- rectangular channel
- isolation
- mimo antenna
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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
- H01Q1/52—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
- H01Q21/00—Antenna arrays or systems
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- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The present invention relates to a kind of mimo antenna based in rectangular channel with line, it is characterised in that it includes：First antenna unit (A), second day unit (B) of the aerial array (1) including specular, Rectangular Enclosure with Participating Media substrate (2), 50 ohm of feeder lines (3), isolation neutralizes line (4), between the metal ground plate (5) at the medium substrate back side, wherein two circular antenna units are located at the upper surface that (A, B) is located at medium substrate (5), and on central shaft specular；Line (5) is neutralized positioned at the centre of two circular antennas, and on central shaft specular.The advantage of the invention is that：Antenna structure is compact, and the distance between antenna element is only 2.2mm, miniaturization, save space；The bandwidth covering 3.5GHz-6.5GHz of antenna；Make the degree of isolation between antenna element high using line is neutralized, all below -24dB, the isolation at centre frequency reaches -30dB to the degree of isolation in working band.
Description
Technical field
The present invention relates to a kind of mimo antenna for wireless communication field, and in particular to be based in rectangular channel to one kind and line
Mimo antenna.
Background technology
The single-input single-output that traditional wireless communication system is made up of a transmitting antenna and a reception antenna
(SISO:Single-Input Single-Output) communication system.By the channel capacity computing formula of Shannon's theorems it is known that SISO
System carries out reliable communication in noisy channel a upper limit capacity.No matter using which kind of modulation technique, type of coding or
Person's other modes carry out communications, can only approach but cannot surmount the limiting value of Shannon's theorems.But, with mobile communication technology
Develop rapidly, consumer has become to the quality of radio communication service and the requirement more and more higher of business, rare frequency spectrum resource
One bottleneck of Communication Development, and MIMO (Multiple-Input Multiple-Output), multiple-input and multiple-output) technology can be
On the premise of not improving transmission power and increasing bandwidth, reduced using the receive-transmit system of multiple transmitting antennas and reception antenna composition
Channel fading, and exponentially improve frequency efficiency and power system capacity.
With the growing demand of user, the transmission of mobile communication also gradually needs to become more reliable, more efficient and higher
Speed.But the current available frequency resource of GSM has become extremely limited and preciousness, therefore can not pass through again
Many frequency spectrums increase the channel capacity and reliability of system.MIMO technology communicated as 4G in one of key technology,
In signals transmission, the channel capacity of communication system can be exponentially improved on the basis of extra frequency spectrum resource is not sacrificed,
The reliability of channel can also be improved simultaneously, reduce bit error rate etc..
One mimo system typically include space-time coding/decoding module, modulus/D/A converter module, modulation/demodulation modules
And antenna system.Wherein antenna system be whole system foremost, the quality of antenna will direct influence whole system performance
Quality.MIMO technology refers to that multiple transmitting antennas and reception antenna are respectively adopted in transmitting and receiving terminal to carry out space diversity
Technology, it uses discrete multiple antennas, communication link effectively can be decomposed into many parallel subchannels, so that
Greatly improve capacity.As a rule, the multipath fading of channel is considered as the factor of harm, information theory it has been proved that when different connect
When receiving orthogonal between antenna and different transmitting antennas, MIMO technology can be used to multipath effect, and multipath is declined
The adverse factor of channel of falling is changed into favorable factor, so as to improve the anti-fading and noiseproof feature of whole mimo system, therefore can be with
Obtain huge capacity.
Mimo antenna design is one of three big key technologies of the MIMO communication technologys.By receiver or emitter chi
Very little and structure limitation, it is necessary to arrange antenna element as much as possible in limited space, to antenna element and antenna array design
Propose requirements at the higher level.Because the factors such as the number of the design of antenna element, array element, array structure and arrangement mode are direct
Influence the spatial coherence of mimo channel.Each antenna element has less correlation in how causing array in limited space
Property so that the corresponding matrix of mimo channel is close to full rank, and it is mimo antenna design to obtain mimo system maximum capacity
Difficult point.
The content of the invention
Mimo antenna array it is an object of the invention to design a compact high isolation suitable for mimo system, should
Antenna realizes the high degree of isolation of two circular antenna units using line is neutralized well, and the mutual coupling for preferably reducing antenna element is special
Property, the structure that makes antenna is compacter, miniaturization, meets the requirement of modern mimo system.
The technical solution adopted in the present invention：
A kind of mimo antenna based in rectangular channel with line, it is characterised in that it includes：Aerial array (1) is wherein wrapped
Include first antenna unit (A), second day unit (B) of specular, Rectangular Enclosure with Participating Media substrate (2), 50 ohm of feeder lines (3),
Isolation neutralizes line (4), between the metal ground plate (5) at the medium substrate back side, wherein two circular antenna units are located at (A, B)
Positioned at the upper surface of medium substrate (5), and on central shaft specular；Neutralization line (5) is in two circular antennas
Between, and on central shaft specular.
Described a kind of mimo antenna based in rectangular channel with line, it is characterised in that isolation neutralizes a termination first of line
The lower end of antenna element (A), the lower end of the antenna element of another termination second (B).
Described a kind of mimo antenna based in rectangular channel with line, it is characterised in that two intersections for neutralizing lines are
One copper coin shape structure (4), the center of inner square and the cylindrical center of circle overlap.
Described a kind of mimo antenna based in rectangular channel with line, it is characterised in that metal ground plate (4) is part
Earth plate, the height of earth plate and 50 ohm of feeder lines it is highly identical.
The invention has following characteristic and advantage：
The antenna structure is simple, and antenna element is the radiating element of two circles, compact conformation, and the spacing of unit is smaller within two days,
Antenna can be made more to minimize on the premise of performance is not influenceed.
Mutual coupling between antenna element can be effectively reduced by neutralizing line, the isolation between antenna is reached -30dB.
Degree of coupling between antenna can be improved by the radius of the circular configuration of change neutralization line and the foursquare length of side,
The performance in day can also be improved by changing the position in the inner circle center of circle.
Metal ground plate uses part metals earth plate, increased the bandwidth of antenna.
Brief description of the drawings
Fig. 1-1 is the basic structure top view of embodiment of the present invention 1；
Fig. 1-2 is the side view of embodiment of the present invention 1；
Fig. 2-1 is the basic structure of the aerial array of embodiment of the present invention 1；
Fig. 2-2 is the basic structure of the metal ground plate of embodiment of the present invention 1；
Specific embodiment
The present invention will be further described below in conjunction with the accompanying drawings, but protection scope of the present invention be not limited to it is as described below.
An example of the present invention as Figure 1-1, it is a kind of based in rectangular channel and line mimo antenna, it includes：My god
First antenna unit (A), second day unit (B) of the linear array (1) including specular, Rectangular Enclosure with Participating Media substrate (2),
50 ohm of feeder lines (3), isolation neutralizes line (4), between the metal ground plate (5) at the medium substrate back side, wherein two circular days
Line unit is located at the upper surface that (A, B) is located at medium substrate (5), and on central shaft specular；Neutralize line (5)
Positioned at the centre of two circular antennas, and on central shaft specular.
As Figure 1-1, medium substrate (2) is the FR-4 that relative dielectric constant is 4.4 to an example of the present invention.Jie
The thickness of matter substrate is 0.8mm, and width is W, and length is L.
As shown in Figure 1-2, the radiating element of the antenna is located at the upper surface of medium substrate, and metal ground plate is located at medium substrate
Lower surface, the height of metal ground plate is H.
As shown in Fig. 2-1, the radiating element of antenna is circular microstrip line, and round radius is R1, and two antenna elements are on axle
Symmetrical to being mirrored into, the distance between antenna element is d；50 ohm of lower edge alignment of the lower edge and medium substrate of feeder line,
The line width of feeder line is g.
As shown in Fig. 2-1, the line width for neutralizing line is S2, is S1 with 50 ohm of distances of feeder line；Neutralize line intermediate circular section
Exceptionally round radius is R2, and the length of side of inner square is 2*R3；The cylindrical center of circle and foursquare center superposition.
As shown in Fig. 2-2, metal ground plate is rectangle, and its a width of h, the length with 50 ohm of feeder lines is identical.
A kind of mimo antenna based in rectangular channel with line of the invention, design parameter：
The selection of medium substrate：Relative dielectric constant is 4.4 FR4 materials, FR4 materials have electrical insulation capability stabilization,
Flatness is good, surface is smooth, without pit, thickness deviation standard the characteristics of, its excellent electrical properties, operating temperature is higher,
Performance itself is affected by environment small, is common used material, is easy to make and industrial production.Many radiation patch and Jie on medium substrate
Metal ground plate under matter substrate uses copper product.
In general the center radiation frequency of monopole antenna is approximately equal to the radiation frequency of the cylindrical wire of same homalographic, and design should
The centre frequency of antenna is 4.5GHz, and the resonant frequency according to cylindrical wire calculates formula and can be calculated the size of radiation fin.
Such as Fig. 1-1, Fig. 2-1, shown in Fig. 2-2, the specific size of the mimo antenna is：W=35mm, L=33mm,
R1=5.1mm, R2=4.5mm, R3=2.1mm, S1=1.3mm, S2=1mm, h=17mm, g=1mm, d=2.2mm,
H2=7.2mm, L2=17mm.
Claims (4)
1. it is a kind of based in rectangular channel and line mimo antenna, it is characterised in that it includes：Aerial array (1) is including mirror image
Symmetrical first antenna unit (A), second day unit (B), Rectangular Enclosure with Participating Media substrate (2), 50 ohm of feeder lines (3), every
From line (4) is neutralized, between the metal ground plate (5) at the medium substrate back side, wherein two circular antenna units are located at (A, B)
Positioned at the upper surface of medium substrate (5), and on central shaft specular；Line (5) is neutralized positioned at two circular antennas
Centre, and on central shaft specular.
2. it is according to claim 1 it is a kind of based in rectangular channel and line mimo antenna, it is characterised in that isolation neutralizes line
The lower end of one termination first antenna unit (A), the lower end of the antenna element of another termination second (B).
3. it is according to claim 1 it is a kind of based in rectangular channel and line mimo antenna, it is characterised in that two neutralize neutralize lines
Intersection be copper coin shape structure (4), the center of inner square and the cylindrical center of circle overlap.
4. it is according to claim 1 it is a kind of based in rectangular channel and line mimo antenna, it is characterised in that metal ground plate (4)
Be partial earthing plate, the height of earth plate and 50 ohm of feeder lines it is highly identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510938556.XA CN106876925A (en) | 2015-12-10 | 2015-12-10 | A kind of mimo antenna based in rectangular channel with line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510938556.XA CN106876925A (en) | 2015-12-10 | 2015-12-10 | A kind of mimo antenna based in rectangular channel with line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106876925A true CN106876925A (en) | 2017-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510938556.XA Pending CN106876925A (en) | 2015-12-10 | 2015-12-10 | A kind of mimo antenna based in rectangular channel with line |
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| Country | Link |
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| CN (1) | CN106876925A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109687127A (en) * | 2018-12-19 | 2019-04-26 | 南京理工大学 | A kind of high insulating degree omnidirectional dual-mode antenna |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202513284U (en) * | 2012-01-18 | 2012-10-31 | 华南理工大学 | MIMO antenna for raising isolation by using broadband T type neutral line |
-
2015
- 2015-12-10 CN CN201510938556.XA patent/CN106876925A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202513284U (en) * | 2012-01-18 | 2012-10-31 | 华南理工大学 | MIMO antenna for raising isolation by using broadband T type neutral line |
Non-Patent Citations (1)
| Title |
|---|
| SHUAI ZHANG ET-AL: "《Mutual Coupling Reduction for UWB MIMO Antennas With a Wideband Neutralization Line》", 《IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109687127A (en) * | 2018-12-19 | 2019-04-26 | 南京理工大学 | A kind of high insulating degree omnidirectional dual-mode antenna |
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Application publication date: 20170620 |