CN106532235A - 4*4 ultra-wideband MIMO antenna - Google Patents
4*4 ultra-wideband MIMO antenna Download PDFInfo
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- CN106532235A CN106532235A CN201610956556.7A CN201610956556A CN106532235A CN 106532235 A CN106532235 A CN 106532235A CN 201610956556 A CN201610956556 A CN 201610956556A CN 106532235 A CN106532235 A CN 106532235A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
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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
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
Abstract
The invention relates to a 4*4 ultra-wideband MIMO antenna, which belongs to the technical field of wireless communication. The 4*4 ultra-wideband MIMO antenna consists of four monopole ultra-wideband antenna units, two rectangular reticular cross-shaped isolation structures and a dielectric plate. The four monopole ultra-wideband antenna units have a same structure and are situated on the four corners of the dielectric plate. Two antennas on one diagonal line turn180 degrees, and antennas on one horizontal line turn 90 degrees. The integral body is centrosymmetric relative to the dielectric plate. The two rectangular reticular cross-shaped isolation structures are situated on the centers of the front and back sides of the dielectric plate and are vertically symmetric relative to the dielectric plate. The novel reticular isolation structures introduced in the MIMO antenna allow the antenna to obtain excellent isolation performance. The 4*4 ultra-wideband MIMO antenna has the advantages of wide bandwidth, high isolation degree, simple structure and easy manufacture and integration, and is suitable for various mini mobile terminals.
Description
Technical field
The present invention relates to a kind of 4 × 4 ultra broadband mimo antennas, belong to wireless communication technology field.
Background technology
Ultra broadband（UWB）Technology is a kind of new short distance high-speed radiocommunication technology for receiving much concern at present.Since U.S.
Since 3.1-10.6 GHz are divided into civilian UWB frequency ranges by Federal Communications Committee of state, industrial quarters and academia UWB without
Line electro-technical field has carried out substantial amounts of research work.
Multiple-input and multiple-output (MIMO) technology also in recent years since broadband wireless communications one of important technology, should
Technology can exponentially improve the channel capacity of system in the case where additionally frequency spectrum resource and antenna transmission power is not increased,
The availability of frequency spectrum is substantially increased, is considered the core technology of next generation mobile communication.By super-broadband tech and MIMO antennas
Combine and can improve the link reliability and adaptation ability of system well.Compared with narrowband wireless communication, it can be by
Multipath fading is preferably minimized, further to improve transmission speed and quality.
The difficult point of MIMO Antenna Design is how to realize integrated multiple antenna elements in limited space, and is obtained
Obtain higher isolation.From the point of view of existing ultra broadband MIMO Antenna Design is reported at present, the band of wherein most design
Wide all very narrow, isolation is not also high, and size is also than larger, although all introduce in existing many mimo antennas many various
Isolation structure, but mostly exist improve isolation frequency band is narrow or the shortcomings of bad isolation effect.
A kind of 4 × 4 ultra broadband mimo antennas based on electromagnetic bandgap structure proposed by the present invention, by literature search, have no
Report is disclosed with identical of the present invention.
The content of the invention
It is an object of the invention to overcome the deficiency of prior art, 4 × 4 ultra broadband mimo antennas are designed.
4 × 4 ultra broadband mimo antennas in the present invention are made up of following seven part：Dielectric-slab, four monopole ultra-wide days
Line unit, the netted cross isolation structure of two rectangles, wherein：
A. dielectric-slab is square dielectric-slab；
B. four monopole ultra-wideband antenna structures are identical, at four drift angles on square dielectric-slab upper strata, adjacent two
Individual monopole ultra-wideband antenna is mutually perpendicular to two-by-two, non-conterminous two monopole ultra-wideband antennas be in antiparallel arrangements, four
Individual antenna is centrosymmetric on dielectric-slab；
C. four monopole ultra-wideband antenna units adopt coplanar wave guide feedback, and feeding microstrip line is perpendicular to square medium
The edge of plate；
D. each monopole ultra-wideband antenna unit is made up of radiating element, feed element and ground unit, wherein：Radiation is single
Unit is by first " ladder " shape microstrip structure, second " ladder " shape microstrip structure, " diplopore bridge " shape microstrip structure, " moon " shaped microstrip knot
Structure and rectangular microstrip structure are constituted, and first " ladder " shape microstrip structure, second " ladder " shape microstrip structure, " diplopore bridge " shape are micro-
Band structure, " moon " shaped microstrip structure and rectangular microstrip structure surround a semi-open type groove, and semi-open type groove is by smaller part circular groove, big
Half slot and rectangular channel composition；Feed element is rectangular microstrip feeder line；Ground unit by the first " circular arc slope " shape microstrip structure and
Second " circular arc slope " shape microstrip structure is constituted；First " circular arc slope " shape microstrip structure is by etching first respectively on rectangular patch
Individual a quarter circular groove, first rectangular channel of first horizontal direction rectangular channel and vertical direction are obtained, second " circular arc slope " shape
Microstrip structure is by etching second a quarter circular groove, second horizontal direction rectangular channel and vertically respectively on rectangular patch
Second, direction rectangular channel is obtained, and the first " circular arc slope " shape microstrip structure and second " circular arc slope " shape microstrip structure size phase
Together, it is symmetrical relative to feed element, and gap is formed with microstrip feed line, constitute co-planar waveguide；
E. the netted cross isolation structure of rectangle includes that the netted cross isolation structure of upper strata rectangle and lower floor's rectangle are netted；Its
In, the cross isolation structure of the netted cross isolation structure of upper strata rectangle is printed on the middle position of the upper surface of dielectric-slab, under
The netted cross isolation structure of layer rectangle is printed on the middle position of the lower surface of dielectric-slab；The netted cross isolation of upper strata rectangle
Structure and the netted cross isolation structure of lower floor's rectangle have identical structure and size；
F. the netted cross isolation structure of rectangle is by etching 24 respectively on four arms of the cross microstrip structure of printing
Periodic little rectangular channel, and etch four periodically big rectangular channels to realize at the middle part of the structure, form periodicity
Mesh, the netted cross isolation structure of each rectangle are centrosymmetric structure.
Four antenna elements are positioned at four drift angles of dielectric-slab, the spacing between antenna element can be made in limited sky
It is interior to be maximized, so as to improve the isolation between antenna element；And by four monopole ultra-wideband antenna units according to phase
Two adjacent antenna elements are mutually perpendicular to two-by-two, and non-conterminous two antenna elements are in antiparallel arrangements, and overall in center
Symmetric mode then makes dwi hastasana be orthogonal polarization, to improve the isolation between antenna element, and obtains diversity gain；Its technology is former
Reason is improving the isolation between antenna element using the cross polarization of electromagnetic wave.
The netted cross isolation structure of identical rectangle is introduced respectively in the double-edged middle body of dielectric-slab, can be significantly
Improve the isolation performance of mimo antenna；Its know-why be make use of the structure current coupling act on and it to electromagnetic wave
Resonance effect is improving the isolation between antenna element.
The introducing of periodicity mesh, makes the cross microstrip structure of the present invention be internally formed various LC resonant tanks, humorous
Shake so that the cross microstrip structure is provided with surface wave frequency selective characteristic, so as to be effectively improved isolation.And using double-deck
Network structure, defines a larger gap electric capacity, so that being coupled to upper strata ten from antenna element between upper and lower double-layer structure
Electric current on font microstrip structure can be further coupled to the cross microstrip structure of lower floor；Therefore, by cross microstrip structure
Further reduce to extraradial electromagnetic signal, such that it is able to further lift isolation.
It is of the invention compared with existing ultra broadband mimo antenna, have the advantage that：
1. antenna size is little, simple structure, can meet the requirement of antenna miniaturization well；
2. the netted cross isolation structure of newly-designed rectangle has structure novelty, size is little, processing is simple, isolation effect good
The advantages of；
3. antenna has good ultra broadband and isolation performance；
4. low manufacture cost, high precision, favorable repeatability, are easy to batch production.
Description of the drawings
Fig. 1 is schematic structural view of the invention.
Fig. 2 is single monopole ultra-wideband antenna cellular construction schematic diagram.
Fig. 3 whether there is cancellated clawback loss test comparing result for antenna in the present invention.
Fig. 4 is to whether there is cancellated isolation performance test comparison result between adjacent antenna units in the present invention.
Fig. 5 is to whether there is cancellated isolation performance test comparison result between alternate antenna element in the present invention.
Fig. 6 is measurement direction figure of 1 independent drive of antenna port on XOZ with YOZ planes in 5.5GHz.
Fig. 7 is measurement direction figure of 2 independent drive of antenna port on XOZ with YOZ planes in 5.5GHz.
Fig. 8 is measurement direction figure of 3 independent drive of antenna port on XOZ with YOZ planes in 5.5GHz.
Fig. 9 is measurement direction figure of 4 independent drive of antenna port on XOZ with YOZ planes in 5.5GHz.
Figure 10 is the antenna diversity gain of the present invention.
Specific embodiment
As shown in Figure 1,4 × 4 ultra broadband mimo antennas in the present invention are made up of following 7 part：Dielectric-slab 1, four lists
Extremely sub- ultra-wide antenna element 2-5, the netted cross isolation structure 6,7 of rectangle, wherein：
A. dielectric-slab 1 is square dielectric-slab；
B. four monopole ultra-wideband antenna 2-5 structures are identical, at four drift angles on 1 upper strata of square dielectric-slab, adjacent
Two monopole ultra-wideband antennas be mutually perpendicular to two-by-two, non-conterminous two monopole ultra-wideband antennas be in antiparallel row
Row, four antennas are centrosymmetric on dielectric-slab；
C. four monopole ultra-wideband antenna unit 2-5 adopt coplanar wave guide feedback, and feeding microstrip line is perpendicular to square Jie
The edge of 1 plate of matter；
D. each monopole ultra-wideband antenna unit is made up of radiating element, feed element and ground unit, wherein：Radiation is single
Unit is by first the 10, second " ladder " shape of " ladder " shape microstrip structure microstrip structure 11, " diplopore bridge " shape microstrip structure 12, " moon " shape
Microstrip structure 13 and rectangular microstrip structure 14 are constituted, and the first " ladder " shape microstrip structure 10, second " ladder " shape microstrip structure
11st, " diplopore bridge " shape microstrip structure 12, " moon " shaped microstrip structure 13 and rectangular microstrip structure 14 surround a semi-open type groove, and half
Open type groove is made up of smaller part circular groove 18, more than half circular groove 19 and rectangular channel 20；Feed element is rectangular microstrip feeder line；Ground unit
It is made up of first " circular arc slope " shape microstrip structure 16 and second " circular arc slope " shape microstrip structure 17；First " circular arc slope " shape micro-strip is tied
Structure 16 is by etching first a quarter circular groove, 21, first horizontal direction rectangular channel 23 and vertically respectively on rectangular patch
First, direction rectangular channel 25 is obtained, and the second " circular arc slope " shape microstrip structure 17 is by etching second respectively on rectangular patch
22, second horizontal direction rectangular channel 24 of a quarter circular groove and second rectangular channel 26 of vertical direction are obtained, and the first " circular arc
Slope " shape microstrip structure 16 and second " circular arc slope " shape microstrip structure 17 are equivalently-sized, symmetrical relative to feed element, and with
Microstrip feed line 15 forms gap, constitutes co-planar waveguide；
E. the netted cross isolation structure of rectangle 6,7 includes that the netted cross isolation structure 6 of upper strata rectangle and lower floor's rectangle are netted
7；Wherein, the cross isolation structure of the netted cross isolation structure of upper strata rectangle 6 is printed on the central position of the upper surface of dielectric-slab 1
Put, the netted cross isolation structure of lower floor's rectangle 7 is printed on the middle position of the lower surface of dielectric-slab 1；Upper strata rectangle netted ten
Font isolation structure 6 and the netted cross isolation structure 7 of lower floor's rectangle have identical structure and size；
F. the netted cross isolation structure 6,7 of rectangle, by being etched on four arms of the cross microstrip structure of printing respectively
24 periodic little rectangular channels 8, and etch four periodically big rectangular channels 9 to realize at the middle part of the structure, formed
Periodicity mesh, the netted cross isolation structure of each rectangle are centrosymmetric structure.
4 × 4 ultra broadband mimo antennas in the present invention, by introducing novel netted isolation structure as above, significantly
Improve the isolation performance of mimo antenna；It is 4.6 that dielectric-slab 1 as above adopts dielectric constant and loss angle tangent is 0.02
FR4 dielectric materials, its size be 60 mm × 60 mm × 1.6 mm；The test result of antenna return loss is as shown in Fig. 2 survey
Test result shows, the bandwidth of operation of antenna element 2-5（That is the frequency range of S11 (S22, S33, S44) -10dB）It is 3.05-
13.06 GHz, cover the civilian UWB frequency bands of 3.1-10.6 well；Fig. 3 is isolation between adjacent antenna units in the present invention
Energy test result, as seen from the figure, in the whole frequency range of 3.05-13.06 GHz, the isolation between adjacent antenna units exists
In 26.41 more than dB, most frequency ranges, its isolation is all higher than 30 dB；Fig. 4 is alternate antenna element interval in the present invention
From the performance test results, as seen from the figure, in the whole frequency range of 3.05-13.06 GHz, alternate antenna element interval exists from degree
In 25.59 more than dB, most frequency ranges, its isolation is all higher than 30 dB；As can be seen here, the antenna has excellent isolation
Performance；In addition, the size of antenna only has 60 mm × 60 mm × 1.6 mm, the requirement of miniaturization can be met well；In a word, should
Antenna is the superior ultra broadband mimo antenna of little a size, ultra broadband and isolation performance.
Above the better embodiment of the present invention is explained in detail, but the present invention is not limited to above-mentioned embodiment party
Formula, in the ken that one skilled in the relevant art possesses, can be with the premise of without departing from present inventive concept
Make a variety of changes.
Claims (3)
1. 4 × 4 ultra broadband mimo antenna of one kind, it is characterised in that include：Dielectric-slab（1）, four monopole ultra-wideband antenna lists
Unit（2-5）, the netted cross isolation structure of rectangle（6）、（7）, wherein：
A. dielectric-slab (1) is square dielectric-slab；
B. four monopole ultra-wideband antennas（2-5）Structure is identical, positioned at square dielectric-slab（1）Four drift angles of upper surface
Place, two adjacent monopole ultra-wideband antennas are mutually perpendicular to two-by-two, and non-conterminous two monopole ultra-wideband antennas are in reverse
It is arranged in parallel；Four antennas are centrosymmetric on dielectric-slab；
C. four monopole ultra-wideband antenna units（2-5）Coplanar wave guide feedback is adopted, feeding microstrip line is perpendicular to square
Dielectric-slab（1）Edge；
D. each monopole ultra-wideband antenna unit is made up of radiating element, feed element and ground unit, wherein：Radiation is single
Unit is by first " ladder " shape microstrip structure（10）, second " ladder " shape microstrip structure（11）, " diplopore bridge " shape microstrip structure（12）、
" moon " shaped microstrip structure（13）With rectangular microstrip structure（14）Constitute, and first " ladder " shape microstrip structure（10）, the second " rank
Ladder " shape microstrip structure（11）, " diplopore bridge " shape microstrip structure（12）, " moon " shaped microstrip structure（13）With rectangular microstrip structure（14）
A semi-open type groove is surrounded, semi-open type groove is by smaller part circular groove（18）, more than half circular groove（19）And rectangular channel（20）Composition；Feed
Unit is rectangular microstrip feeder line（15）；Ground unit is by first " circular arc slope " shape microstrip structure（16）It is micro- with second " circular arc slope " shape
Band structure（17）Constitute；First " circular arc slope " shape microstrip structure（16）By etched on rectangular patch respectively first four/
One circular groove（21）, first horizontal direction rectangular channel（23）With first rectangular channel of vertical direction（25）Obtain, the second " circular arc
Slope " shape microstrip structure（17）By etching second a quarter circular groove on rectangular patch respectively（22）, second level side
To rectangular channel（24）With second rectangular channel of vertical direction（26）Obtain, and first " circular arc slope " shape microstrip structure（16）With second
" circular arc slope " shape microstrip structure（17）It is equivalently-sized, it is symmetrical relative to feed element, and and microstrip feed line（15）Form seam
Gap, constitutes co-planar waveguide；
E. the netted cross isolation structure of rectangle（6）、（7）Including the netted cross isolation structure of upper strata rectangle（6）With lower floor's square
Shape is netted（7）；Wherein, the netted cross isolation structure of upper strata rectangle（6）It is printed on dielectric-slab（1）Upper surface central position
Put, the netted cross isolation structure of lower floor's rectangle（7）It is printed on dielectric-slab（1）Lower surface middle position；Upper strata rectangle net
The cross isolation structure of shape（6）With the netted cross isolation structure of lower floor rectangle（7）With identical structure and size.
2. a kind of 4 × 4 ultra broadband mimo antenna according to claim 1, it is characterised in that：The rectangle is netted cross
Isolation structure（6）、（7）, by etching 24 periodic little squares respectively on four arms of the cross microstrip structure of printing
Shape groove（8）, and four periodically big rectangular channels are etched at the middle part of the structure（9）To realize, periodicity mesh is formed, often
The netted cross isolation structure of individual rectangle is centrosymmetric structure.
3. 4 × 4 ultra broadband mimo antennas according to claim 1,2, it is characterised in that：The dielectric-slab（1）Using Jie
The FR4 dielectric materials that electric constant is 4.6 and loss angle tangent is 0.02, size are 60 mm × 60 mm × 1.6 mm.
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| CN201610956556.7A CN106532235B (en) | 2016-11-03 | 2016-11-03 | 4 × 4 ultra wide band mimo antennas |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106961016A (en) * | 2017-05-08 | 2017-07-18 | 江苏亨鑫科技有限公司 | A kind of polarization and four different unit mimo antennas of directional diagram |
| CN107689484A (en) * | 2017-08-10 | 2018-02-13 | 合肥联宝信息技术有限公司 | The method of the isolation of antenna, electronic equipment and raising antenna |
| CN108879079A (en) * | 2018-06-22 | 2018-11-23 | 西安交通大学 | A kind of high-isolation array antenna based on electromagnetic wave absorption body |
| CN109638440A (en) * | 2018-12-19 | 2019-04-16 | 电子科技大学 | A kind of 5G communication miniaturization broadband mimo antenna based on Meta Materials |
| CN111527646A (en) * | 2017-12-28 | 2020-08-11 | 株式会社村田制作所 | Antenna array and antenna module |
| CN114696081A (en) * | 2022-04-08 | 2022-07-01 | 苏州迈斯维通信技术有限公司 | Multi-order resonance high-isolation bandwidth cavity array antenna system and antenna unit |
| CN116154478A (en) * | 2023-04-19 | 2023-05-23 | 湖南大学 | Miniaturized MIMO antenna |
| EP4080676A4 (en) * | 2019-12-17 | 2024-01-03 | Defense Agency For Tech And Quality | Electromagnetic band-gap structure |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106961016A (en) * | 2017-05-08 | 2017-07-18 | 江苏亨鑫科技有限公司 | A kind of polarization and four different unit mimo antennas of directional diagram |
| CN106961016B (en) * | 2017-05-08 | 2023-06-23 | 江苏亨鑫科技有限公司 | Four-unit MIMO antenna with different polarization and directional patterns |
| CN107689484A (en) * | 2017-08-10 | 2018-02-13 | 合肥联宝信息技术有限公司 | The method of the isolation of antenna, electronic equipment and raising antenna |
| CN111527646A (en) * | 2017-12-28 | 2020-08-11 | 株式会社村田制作所 | Antenna array and antenna module |
| CN108879079A (en) * | 2018-06-22 | 2018-11-23 | 西安交通大学 | A kind of high-isolation array antenna based on electromagnetic wave absorption body |
| CN108879079B (en) * | 2018-06-22 | 2019-08-23 | 西安交通大学 | A kind of high-isolation array antenna based on electromagnetic wave absorption body |
| CN109638440A (en) * | 2018-12-19 | 2019-04-16 | 电子科技大学 | A kind of 5G communication miniaturization broadband mimo antenna based on Meta Materials |
| EP4080676A4 (en) * | 2019-12-17 | 2024-01-03 | Defense Agency For Tech And Quality | Electromagnetic band-gap structure |
| CN114696081A (en) * | 2022-04-08 | 2022-07-01 | 苏州迈斯维通信技术有限公司 | Multi-order resonance high-isolation bandwidth cavity array antenna system and antenna unit |
| CN114696081B (en) * | 2022-04-08 | 2023-10-10 | 苏州迈斯维通信技术有限公司 | Multi-order resonant high-isolation broadband cavity array antenna system |
| CN116154478A (en) * | 2023-04-19 | 2023-05-23 | 湖南大学 | Miniaturized MIMO antenna |
| CN116154478B (en) * | 2023-04-19 | 2023-06-20 | 湖南大学 | Miniaturized MIMO antenna |
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