CN106532235B - 4 × 4 ultra wide band mimo antennas - Google Patents
4 × 4 ultra wide band mimo antennas Download PDFInfo
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- CN106532235B CN106532235B CN201610956556.7A CN201610956556A CN106532235B CN 106532235 B CN106532235 B CN 106532235B CN 201610956556 A CN201610956556 A CN 201610956556A CN 106532235 B CN106532235 B CN 106532235B
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- 230000000737 periodic effect Effects 0.000 claims description 5
- 238000007639 printing Methods 0.000 claims description 5
- 230000002146 bilateral effect Effects 0.000 claims description 3
- 239000003989 dielectric material Substances 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 8
- 238000004891 communication Methods 0.000 abstract description 5
- 238000013461 design Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
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- 230000005855 radiation Effects 0.000 description 3
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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
- H01Q1/52—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
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Abstract
The present invention relates to a kind of 4 × 4 ultra wide band mimo antennas, belong to wireless communication technology field, by four monopole ultra-wideband antenna units, the netted cross isolation structure of two rectangles and dielectric-slab composition, four monopole ultra-wideband antenna structures are identical, and four antennas are respectively in four vertex of dielectric-slab, two antennas on a diagonal line have overturn 180 degree, antenna on a horizontal line has overturn 90 degree, it is whole to be centrosymmetric relative to dielectric-slab center, and the netted cross isolation structure of two rectangles is located at dielectric-slab tow sides center, it is symmetrical above and below relative to dielectric-slab, by introducing this novel netted isolation structure in mimo antenna, antenna is set to obtain excellent isolation performance.The present invention has with wide, and isolation is high, and structure is simple, be easy to make with it is integrated the advantages that, suitable for all kinds of small mobile terminals.
Description
Technical field
The present invention relates to a kind of 4 × 4 ultra wide band mimo antennas, belong to wireless communication technology field.
Background technique
Ultra wide band (UWB) technology is a kind of novel short distance high-speed radiocommunication technology being concerned at present.Since beauty
Since 3.1-10.6GHz is divided into civilian UWB frequency range by Federal Communications Committee, state, industry and academia UWB without
Line electro-technical field has carried out a large amount of research work.
Multiple-input and multiple-output (MIMO) technology also in recent years since broadband wireless communications one of important technology, the skill
Art can double up the channel capacity of system, greatly in the case where additionally not increasing frequency spectrum resource and antenna transmission power
The availability of frequency spectrum is improved greatly, is considered as the core technology of next generation mobile communication.Super-broadband tech is mutually tied with mimo antenna
Close the link reliability and adaptation ability that can improve system well.Compared with narrowband wireless communication, it can be by multipath
Decline is preferably minimized, further to improve transmission speed and quality.
The difficult point of mimo antenna design integrates mutiple antennas unit in being how to realize in a limited space, and obtains
Higher isolation.From the point of view of existing ultra wide band mimo antenna design report at present, the bandwidth of wherein most design is all
Very narrow, isolation is not also high, and size is also bigger, although all introduced in existing many mimo antennas it is many it is various every
From structure, but mostly there is the disadvantages of frequency band for improving and being isolated is narrow or isolation effect is bad.
A kind of 4 × 4 ultra wide band mimo antennas based on electromagnetic bandgap structure proposed by the present invention have no by literature search
Open report same as the present invention.
Summary of the invention
It is an object of the invention to overcome the deficiency of the prior art, designs 4 × 4 ultra wide band mimo antennas.
4 × 4 ultra wide band mimo antennas in the present invention are made of following seven part: dielectric-slab, four monopole ultra-wide days
Line unit, the netted cross isolation structure of upper layer rectangle, the netted cross isolation structure of lower layer's rectangle, in which:
A. dielectric-slab is square dielectric-slab；
B. four monopole ultra-wideband antenna cellular constructions are identical, four vertex positioned at square dielectric-slab upper layer；
Two adjacent monopole ultra-wideband antennas are mutually perpendicular to two-by-two；Non-conterminous two monopole ultra-wideband antennas are in antiparallel
Arrangement；Four antennas are centrosymmetric on dielectric-slab；
C. four monopole ultra-wideband antenna units are all made of coplanar wave guide feedback, and feeding microstrip line is situated between perpendicular to square
The edge of scutum；
D. each monopole ultra-wideband antenna unit is made of radiating element, feed element and ground unit, in which: radiation
Unit is by the first " ladder " shape microstrip structure, the second " ladder " shape microstrip structure, " diplopore bridge " shape microstrip structure, " moon " shaped microstrip
Structure and rectangular microstrip structure are constituted, and the first " ladder " shape microstrip structure, the second " ladder " shape microstrip structure, " diplopore bridge " shape
Microstrip structure, " moon " shaped microstrip structure and rectangular microstrip structure surround a semi-open type groove, semi-open type groove by smaller part circular groove,
More than half circular groove and rectangular channel composition；Feed element is rectangular microstrip feeder line；Ground unit is by first " circular arc slope " shape microstrip structure
It is constituted with the second " circular arc slope " shape microstrip structure；First " circular arc slope " shape microstrip structure by etching respectively on rectangular patch
First one a quarter circular groove, first horizontal direction rectangular channel and vertical direction rectangular channel obtain, second " circular arc slope "
Shape microstrip structure on rectangular patch by etching second a quarter circular groove, second horizontal direction rectangular channel respectively and erecting
Histogram is obtained to second rectangular channel, and the first " circular arc slope " shape microstrip structure and second " circular arc slope " shape microstrip structure size phase
Together, relative to feed element bilateral symmetry, and gap is formed with microstrip feed line, constitutes co-planar waveguide；
E. the netted cross isolation structure of the rectangle includes the netted cross isolation structure of upper layer rectangle and lower layer's rectangle
Netted cross isolation structure；Wherein, the netted cross isolation structure of upper layer rectangle, the netted cross isolation junction of lower layer's rectangle
Structure, by etching 24 periodic small rectangular channels on four arms of the cross microstrip structure in printing respectively, and at this
The middle part of structure etches four periodically big rectangular channels to realize, forms periodical mesh, each rectangle it is netted it is cross every
It is centrosymmetric structure from structure.
F. the netted cross isolation structure (6) of upper layer rectangle, the netted cross isolation structure (7) of lower layer's rectangle are by printing
24 periodic small rectangular channels are etched on four arms of the cross microstrip structure of brush respectively, and are lost at the middle part of the structure
Four periodically big rectangular channels are carved to realize, form periodical mesh, during each netted cross isolation structure of rectangle is
Heart symmetrical structure.
Four antenna elements are placed in four vertex of dielectric-slab, the spacing between antenna element can be made in limited sky
It is interior to be maximized, thus the isolation between improving 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 whole is 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 the isolation improved between antenna element using the cross polarization of electromagnetic wave.
The identical netted cross isolation structure of rectangle is introduced respectively in the center portion of dielectric-slab tow sides, it can be significant
Improve the isolation performance of mimo antenna；Its technical principle be utilized the structure current coupling effect and it to electromagnetic wave
Resonance effect improves the isolation between antenna element.
The introducing of periodical mesh makes to form various LC resonance circuits inside cross microstrip structure of the invention, humorous
Vibration is so that the cross microstrip structure is provided with surface wave frequency selective characteristic, to can effectively improve isolation.And it uses double-deck
Reticular structure forms a biggish gap capacitor between upper layer and lower layer structure, to make to be coupled to upper layer ten from antenna element
Electric current on font microstrip structure can be further coupled to the cross microstrip structure of lower layer；Therefore, by cross microstrip structure
It is further reduced to the electromagnetic signal of external radiation, so as to further promote isolation.
The present invention has the advantages that compared with existing ultra wide band mimo antenna
1. antenna size is small, structure is simple, can meet the requirement of antenna miniaturization well；
2. the newly-designed netted cross isolation structure of rectangle has, structure novel, size is small, the processing is simple, isolation effect
The advantages that good；
3. antenna has good ultra wide band and isolation performance；
4. low manufacture cost, precision are high, favorable repeatability, convenient for batch production.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention.
Fig. 2 is single monopole ultra-wideband antenna cellular construction schematic diagram.
Fig. 3 is that whether there is or not the clawback loss test comparing results of reticular structure for antenna in the present invention.
Fig. 4 is that whether there is or not the isolation performance test comparison results of reticular structure between adjacent antenna units in the present invention.
Fig. 5 is that whether there is or not the isolation performance test comparison results of reticular structure between alternate antenna element in the present invention.
Fig. 6 is measurement direction figure of 1 independent drive of antenna port on XOZ and YOZ plane in 5.5GHz.
Fig. 7 is measurement direction figure of 2 independent drive of antenna port on XOZ and YOZ plane in 5.5GHz.
Fig. 8 is measurement direction figure of 3 independent drive of antenna port on XOZ and YOZ plane in 5.5GHz.
Fig. 9 is measurement direction figure of 4 independent drive of antenna port on XOZ and YOZ plane in 5.5GHz.
Figure 10 is antenna diversity gain of the invention.
Specific embodiment
As shown in Figure 1,4 × 4 ultra wide band mimo antennas in the present invention are made of following 7 part: dielectric-slab 1, four lists
Extremely sub- ultra-wide antenna element 2-5, the netted cross isolation structure 6 of upper layer rectangle, the netted cross isolation structure 7 of lower layer's rectangle,
Wherein:
A. dielectric-slab 1 is square dielectric-slab；
B. four monopole ultra-wideband antenna unit 2-5 structures are identical, four apex angles positioned at square 1 upper layer of dielectric-slab
Place；Two adjacent monopole ultra-wideband antennas are mutually perpendicular to two-by-two；Non-conterminous two monopole ultra-wideband antennas are in reversed
It is arranged in parallel；Four antennas are centrosymmetric on dielectric-slab；
C. four monopole ultra-wideband antenna unit 2-5 are all made of coplanar wave guide feedback, and feeding microstrip line is perpendicular to pros
The edge of 1 plate of shape medium；
D. each monopole ultra-wideband antenna unit is made of radiating element, feed element and ground unit, in which: radiation
Unit is by first the 10, second " ladder " shape of " ladder " shape microstrip structure microstrip structure 11, " diplopore bridge " shape microstrip structure 12, " moon "
Shaped microstrip structure 13 and rectangular microstrip structure 14 are constituted, and first " ladder " shape microstrip structure 10, second " ladder " shape micro-strip knot
Structure 11, " diplopore bridge " shape microstrip structure 12, " moon " shaped microstrip structure 13 and rectangular microstrip structure 14 surround a semi-open type groove,
Semi-open type groove is made of smaller part circular groove 18, more than half circular groove 19 and rectangular channel 20；Feed element is rectangular microstrip feeder line；Ground connection is single
Member is made of the first " circular arc slope " shape microstrip structure 16 and second " circular arc slope " shape microstrip structure 17；First " circular arc slope " shape micro-strip
Structure 16 on rectangular patch by etching first a quarter circular groove, 21, first horizontal direction rectangular channels 23 respectively and erecting
Histogram is obtained to first rectangular channel 25, and second " circular arc slope " shape microstrip structure 17 by etching second respectively on rectangular patch
22, second horizontal direction rectangular channels 24 of a a quarter circular groove and second rectangular channel 26 of vertical direction obtain, and the first " circle
Arc slope " shape microstrip structure 16 is identical with second " circular arc slope " 17 sizes of shape microstrip structure, relative to feed element bilateral symmetry, and
Gap is formed with microstrip feed line 15, constitutes co-planar waveguide；
E. the netted cross isolation structure 6,7 of rectangle includes the netted cross isolation structure 6 of upper layer rectangle and lower layer's rectangle
Netted cross isolation structure 7；Wherein, the netted cross isolation structure 6 of upper layer rectangle, the netted cross isolation junction of lower layer's rectangle
Structure 7, by etching 24 periodic small rectangular channels 8, Yi Ji on four arms of the cross microstrip structure in printing respectively
The middle part of the structure etches four periodically big rectangular channel 9 to realize, form periodical mesh, each rectangle is netted cross
Isolation structure is centrosymmetric structure.
F. the netted cross isolation structure (6) of upper layer rectangle, the netted cross isolation structure (7) of lower layer's rectangle are by printing
24 periodic small rectangular channels 8 are etched respectively on four arms of the cross microstrip structure of brush, and at the middle part of the structure
Four periodically big rectangular channels 9 are etched to realize, form periodical mesh, each netted cross isolation structure of rectangle is
Centrosymmetric structure.
4 × 4 ultra wide band mimo antennas in the present invention, by introducing novel netted isolation structure as described above, significantly
Improve the isolation performance of mimo antenna；It for 4.6 and loss angle tangent is 0.02 that dielectric-slab 1 as described above, which uses dielectric constant,
FR4 dielectric material, having a size of 60mm × 60mm × 1.6mm；Test results are shown in figure 2 for antenna return loss, test
The results show that the bandwidth of operation (i.e. the frequency range of S11 (S22, S33, S44)≤- 10dB) of antenna element 2-5 is 3.05-
13.06GHz covers the civilian UWB frequency band of 3.1-10.6 well；Fig. 3 isolation between adjacent antenna units in the present invention
Energy test result, as seen from the figure, in the entire frequency range of 3.05-13.06GHz, the isolation between adjacent antenna units exists
26.41dB or more, its interior isolation of most frequency ranges are all larger than 30dB；Fig. 4 be the present invention in alternate antenna element interval from
The performance test results, as seen from the figure, in the entire frequency range of 3.05-13.06GHz, alternate antenna element interval exists from degree
25.59dB or more, its interior isolation of most frequency ranges are all larger than 30dB；It can be seen that the antenna has excellent isolation
Energy；In addition, the size of antenna only has 60mm × 60mm × 1.6mm, the requirement of miniaturization can be met well；In short, the antenna
It is small a size, ultra wide band and the superior ultra wide band mimo antenna of isolation performance.
Better embodiment of the invention is explained in detail above, but the present invention is not limited to above-mentioned embodiment party
Formula within the knowledge of one of ordinary skill in the art can also be without departing from the purpose of the present invention
It makes a variety of changes.
Claims (3)
1. 4 × 4 ultra wide band mimo antenna of one kind characterized by comprising dielectric-slab (1), four monopole ultra-wideband antenna lists
First (2-5), the netted cross isolation structure (6) of upper layer rectangle, the netted cross isolation structure (7) of lower layer's rectangle, in which:
A. dielectric-slab (1) is square dielectric-slab；
B. four monopole ultra-wideband antenna unit (2-5) structures are identical, are located at four tops of square dielectric-slab (1) upper surface
At angle；Two adjacent monopole ultra-wideband antennas are mutually perpendicular to two-by-two；Non-conterminous two monopole ultra-wideband antennas are in anti-
To arranged in parallel；Four antennas are centrosymmetric on dielectric-slab；
C. four monopole ultra-wideband antenna units (2-5) are all made of coplanar wave guide feedback, and feeding microstrip line is perpendicular to square
The edge of dielectric-slab (1)；
D. each monopole ultra-wideband antenna unit is made of radiating element, feed element and ground unit, in which: radiating element
By the first " ladder " shape microstrip structure (10), the second " ladder " shape microstrip structure (11), " diplopore bridge " shape microstrip structure (12),
" moon " shaped microstrip structure (13) and rectangular microstrip structure (14) are constituted, and the 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) and rectangular microstrip structure (14)
A semi-open type groove is surrounded, semi-open type groove is made of smaller part circular groove (18), more than half circular groove (19) and rectangular channel (20)；Feed
Unit is rectangular microstrip feeder line (15)；Ground unit is micro- by first " circular arc slope " shape microstrip structure (16) and second " circular arc slope " shape
Band structure (17) is constituted；First " circular arc slope " shape microstrip structure (16) by etched respectively on rectangular patch first four/
First one circular groove (21), first horizontal direction rectangular channel (23) and vertical direction rectangular channel (25) obtain, the second " circular arc
Slope " shape microstrip structure (17) by etching second a quarter circular groove (22), second level side respectively on rectangular patch
It is obtained to second rectangular channel (26) of rectangular channel (24) and vertical direction, and first " circular arc slope " shape microstrip structure (16) and second
" circular arc slope " shape microstrip structure (17) size is identical, relative to feed element bilateral symmetry, and is formed and is stitched with microstrip feed line (15)
Gap constitutes co-planar waveguide；
E. rectangle netted cross isolation structure (6) in upper layer is printed on the central location of the upper surface of dielectric-slab (1), lower layer's rectangle
Netted cross isolation structure (7) is printed on the central location of the lower surface of dielectric-slab (1)；The netted cross isolation of upper layer rectangle
Structure (6) and the netted cross isolation structure (7) of lower layer's rectangle structure snd size having the same.
2. a kind of 4 × 4 ultra wide band mimo antenna according to claim 1, it is characterised in that: the upper layer rectangle netted ten
Font isolation structure (6) and the netted cross isolation structure (7) of lower layer's rectangle, are by the cross microstrip structure in printing
Four arms on etch 24 periodic small rectangular channels (8) respectively, and etch four periodically at the middle part of the structure
Big rectangular channel (9) Lai Shixian forms periodical mesh, and each netted cross isolation structure of rectangle is centrosymmetric structure.
3. 4 × 4 ultra wide band mimo antenna according to claim 1, it is characterised in that: the dielectric-slab (1) uses dielectric
The FR4 dielectric material that constant is 4.6 and loss angle tangent is 0.02, having a size of 60mm × 60mm × 1.6mm.
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| JP6954376B2 (en) * | 2017-12-28 | 2021-10-27 | 株式会社村田製作所 | Antenna array and antenna module |
| 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 |
| CN109638440B (en) * | 2018-12-19 | 2020-05-12 | 电子科技大学 | A miniaturized broadband MIMO antenna for 5G communication based on metamaterials |
| CN111082231A (en) * | 2019-10-14 | 2020-04-28 | 佛山科新锘通讯有限公司 | MIMO omnidirectional antenna |
| CN110739542A (en) * | 2019-10-14 | 2020-01-31 | 佛山科新锘通讯有限公司 | kinds of wide-band high-isolation antenna |
| KR102273378B1 (en) * | 2019-12-17 | 2021-07-06 | 국방기술품질원 | Electromagnetic bandgap structure |
| 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 |
| CN116154478B (en) * | 2023-04-19 | 2023-06-20 | 湖南大学 | Miniaturized MIMO antenna |
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| US10122074B2 (en) * | 2014-11-19 | 2018-11-06 | Panasonic Intellectual Property Management Co., Ltd. | Antenna device using EBG structure, wireless communication device, and radar device |
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| CN104157982A (en) * | 2014-07-07 | 2014-11-19 | 华东交通大学 | Dual-polarized MIMO antenna based on EBG structure |
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