CN106876923A - With the mimo antenna of line in a kind of type groove based on cross - Google Patents
With the mimo antenna of line in a kind of type groove based on cross Download PDFInfo
- Publication number
- CN106876923A CN106876923A CN201510938539.6A CN201510938539A CN106876923A CN 106876923 A CN106876923 A CN 106876923A CN 201510938539 A CN201510938539 A CN 201510938539A CN 106876923 A CN106876923 A CN 106876923A
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- Prior art keywords
- antenna
- line
- type groove
- cross
- circular
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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
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
-
- 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
- H01Q1/523—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas between antennas of an array
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The present invention relates to the mimo antenna in a kind of type groove based on cross with line, it is characterised in that it includes：The first antenna unit (A) of aerial array (1) specular, second day unit (B), 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 progressive circular antenna units are located at the upper surface that (A, B) is located at medium substrate (2), and on central shaft specular；Line (4) is neutralized positioned at the centre of two circular antennas, and on central shaft specular.Antenna structure is compact, and the distance between antenna element is only 2.2mm, miniaturization, save space；Metal ground plate is done into corner cut treatment, the bandwidth of antenna is extended；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 neutralized based on cross type groove to a kind of
The mimo antenna of line.
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 systems carry out reliable communication in noisy channel a upper limit capacity.No matter using which kind of modulation technique, coding class
Type or other modes carry out communications, can only approach but cannot surmount the limiting value of Shannon's theorems.But, with mobile communication
Technology is developed rapidly, and, to the quality of radio communication service and the requirement more and more higher of business, rare frequency spectrum resource is consumer
A bottleneck as 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, the receive-transmit system constituted using multiple transmitting antennas and reception antenna
To reduce 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：
With the mimo antenna of line in a kind of type groove based on cross, it is characterised in that it includes：The first antenna of specular
Unit (A), second day unit (B), Rectangular Enclosure with Participating Media substrate (2), 50 ohm of feeder lines (3), isolation neutralize line (4), between
The metal ground plate (5) at the medium substrate back side, wherein two progressive circular antenna units are located at (A, B) is located at medium substrate (2)
Upper surface, and on central shaft specular；Line (4) is neutralized positioned at the centre of two circular antennas, and on central shaft
Specular.
With the mimo antenna of line in a kind of described type groove based on cross, it is characterised in that：The antenna element of two speculars
For progressive, antenna top half is semi-circular, and the latter half is that ladder is progressive.
With the mimo antenna of line in a kind of described type groove based on cross, it is characterised in that：Etched in electric current and centered on line
There is the circular configuration of cross recess.
With the mimo antenna of line in a kind of described type groove based on cross, it is characterised in that：Metal ground plate (5) is square
Shape cuts two trapezium structures at angle of top edge, and the length of earth plate is identical with the length of 50 ohm of feeder lines.
The invention has following characteristic and advantage：
The antenna structure is simple, and antenna element is two progressive circular radiating elements, compact conformation, two days spacing of unit compared with
It is small, 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.
The degree of coupling between antenna can be improved by adjusting the size of cross structure, coupling is strong between reducing antenna element
Degree.
The antenna has bandwidth wider, and between 3.5GHz-6.5GHz, bandwidth range is in ultra-wideband bandwidth for day bandwidth
In (3.1-10.6GHz), can be used for ultra wide band.The antenna has good radiation characteristic, the echo at centre frequency
Loss can reach -17dB.
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.
As Figure 1-1, with the mimo antenna of line in a kind of type groove based on cross, it includes an example of the present invention：
The first antenna unit (A) of specular, 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 progressive circular antenna units are located at (A, B)
Positioned at the upper surface of medium substrate (2), and on central shaft specular；Neutralization line (4) is in two circular antennas
Between, and on central shaft specular.
As Figure 1-1, medium substrate (2) is that relative dielectric constant is 4.4, loss tangent angle to an example of the present invention
It is 0.025 FR-4.The thickness of the medium 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 the microstrip line of progressive Step Circular, and round radius is R1, two antenna lists
Unit is symmetrical on being axially mirrored into, and the distance between antenna element is d；The lower edge of 50 ohm of feeder lines and medium substrate it is following
Edge aligns, and the line width of feeder line is g.
As shown in Fig. 2-1, the radiating element of antenna is progressive Step Circular structure, is carved in the lower half circle of circular radiation sheet metal
Two hierarchic structures are lost, with the center of circle in the same horizontal line, ladder width is W1 to the top edge of ladder one, is highly L1；Ladder
Two width is W2, and the height of ladder is L2.
As shown in Fig. 2-1, the line width for neutralizing line is S2, is S1 with 50 ohm of distances of feeder line；The R2 of line circle is neutralized,
Round center etches a cross recess, and the width of groove is respectively W3, W4.
As shown in Fig. 2-2, metal ground plate is part metals ground, and two angles of rectangular metal earth plate are cut, and is cut
The right-angle side length of side of right angle trigonometry type is L3.
With the mimo antenna of line, design parameter in a kind of type groove based on cross of the invention：
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,
WI=4.1mm, W2=3mm, L1=2mm, L2=1mm, L3=3mm, R1=5.1mm, R2=4.5mm, W3=2mm,
W4=1.5mm, S1=1.3mm, S2=1mm, h=17mm, g=1mm, d=2.2mm, h2=7.2mm h1=17mm.
Claims (4)
1. in a kind of type groove based on cross and line mimo antenna, it is characterised in that it includes：Aerial array (1) specular
First antenna unit (A), second day unit (B), Rectangular Enclosure with Participating Media substrate (2), 50 ohm of feeder lines (3), isolation are neutralized
Line (4), between the metal ground plate (5) at the medium substrate back side, wherein two progressive circular antenna units are located at (A, B) position
In the upper surface of medium substrate (2), and on central shaft specular；Neutralization line (4) is in two circular antennas
Between, and on central shaft specular.
2. in a kind of type groove based on cross according to claim 1 and line mimo antenna, it is characterised in that：Two speculars
Antenna element for progressive, antenna top half is semi-circular, and the latter half is that ladder is progressive.
3. in a kind of type groove based on cross according to claim 1 and line mimo antenna, it is characterised in that：In electric current and line
Centered on be etched with the circular configuration of cross recess.
4. in a kind of type groove based on cross according to claim 1 and line mimo antenna, it is characterised in that：Metal ground plate
Two trapezium structures at angle of top edge are cut for rectangle, the length of earth plate is identical with the length of 50 ohm of feeder lines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510938539.6A CN106876923A (en) | 2015-12-10 | 2015-12-10 | With the mimo antenna of line in a kind of type groove based on cross |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510938539.6A CN106876923A (en) | 2015-12-10 | 2015-12-10 | With the mimo antenna of line in a kind of type groove based on cross |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106876923A true CN106876923A (en) | 2017-06-20 |
Family
ID=59238763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510938539.6A Pending CN106876923A (en) | 2015-12-10 | 2015-12-10 | With the mimo antenna of line in a kind of type groove based on cross |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106876923A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102025025A (en) * | 2010-10-29 | 2011-04-20 | 华南理工大学 | Small-sized wideband high-isolation four-unit MIMO antenna array |
| CN202797266U (en) * | 2012-06-25 | 2013-03-13 | 中国计量学院 | Inverted-ladder-shaped single-frequency microstrip antenna |
| KR20150072119A (en) * | 2013-12-19 | 2015-06-29 | 한양대학교 산학협력단 | MIMO Antenna for Human Body Communication |
-
2015
- 2015-12-10 CN CN201510938539.6A patent/CN106876923A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102025025A (en) * | 2010-10-29 | 2011-04-20 | 华南理工大学 | Small-sized wideband high-isolation four-unit MIMO antenna array |
| CN202797266U (en) * | 2012-06-25 | 2013-03-13 | 中国计量学院 | Inverted-ladder-shaped single-frequency microstrip antenna |
| KR20150072119A (en) * | 2013-12-19 | 2015-06-29 | 한양대학교 산학협력단 | MIMO Antenna for Human Body Communication |
Non-Patent Citations (2)
| Title |
|---|
| SHUAI ZHANG AND GERT FRØLUND PEDERSEN: "Mutual Coupling Reduction for UWB MIMO Antennas With a Wideband Neutralization Line", 《IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS》 * |
| 马晓亮: "超宽带天线及其相关特性的研究与设计", 《中国优秀硕士学位论文全文数据库》 * |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170620 |
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| WD01 | Invention patent application deemed withdrawn after publication |