CN106816704A - The three port mimo antennas based on aperture slots - Google Patents
The three port mimo antennas based on aperture slots Download PDFInfo
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- CN106816704A CN106816704A CN201710035301.1A CN201710035301A CN106816704A CN 106816704 A CN106816704 A CN 106816704A CN 201710035301 A CN201710035301 A CN 201710035301A CN 106816704 A CN106816704 A CN 106816704A
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- medium substrate
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- metal level
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- 239000000758 substrate Substances 0.000 claims abstract description 53
- 239000002184 metal Substances 0.000 claims abstract description 27
- 229910052751 metal Inorganic materials 0.000 claims abstract description 27
- 125000004122 cyclic group Chemical group 0.000 claims abstract description 9
- 239000004020 conductor Substances 0.000 claims abstract description 7
- 150000002739 metals Chemical class 0.000 abstract 1
- 238000002955 isolation Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000002592 echocardiography Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
Classifications
-
- 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
- H01Q1/50—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
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- Waveguide Aerials (AREA)
Abstract
The three port mimo antennas based on aperture slots, the mimo antenna for being related to multiport to feed.Including medium substrate, the medium substrate is provided with the circular media substrate of the upper and lower 2, it is connected by 3 coaxial lines between 2 circular media substrates, it is symmetrical that 3 coaxial lines are mutually hexagonal angle, with the fan-shaped metal level of the lower surface three of upper layer medium substrate be connected the lower surface metal layer of layer dielectric substrate by the outer conductor of coaxial line, and the inner wire of coaxial line is connected with the metal strip layer of the upper surface of upper layer medium substrate；The lower surface of layer dielectric substrate is coated with metal level；The lower surface of upper layer medium substrate is coated with metal level, the metal level is divided into three sector regions by 3 strip gaps, each sector region extends internally along the edge on arc side and is provided with a rectangular aperture, the upper surface of upper layer medium substrate is coated with 3 Cyclic dart shape strip metals layer, and it is symmetrical that 3 Cyclic dart shape strip metal layers are mutually hexagonal angle.
Description
Technical field
The present invention relates to a kind of mimo antenna of multiport feed, more particularly, to a kind of three ports based on aperture slots
Mimo antenna.
Background technology
MIMO (Multiple-Input Multiple-Output) system is improved using the space diversity technology of multiple antennas
One of the channel capacity and transmission rate of communication system, the key technology as Modern Communication System.Multiport mimo antenna
Worked simultaneously by different port and realize MIMO technique, and the combination of multiple aperture slots is to realize that multiport works
Common method.There is aperture slots antenna simple structure, broadband, low conductor losses, radiating element and feeding network to have
The advantages of preferable isolation characteristic, the characteristics of it has low section, small volume, the integrated surface easily with other circuits or system simultaneously
[Akhavan H G,Mirshekar-Syahkal D.Study of coupled slot antennas fed by
microstrip lines[C].IEE conference publication.Institution of Electrical
Engineers,1997:1.290-1.293.]。
Various multi-port antennas based on gap structure for being applied to mimo system existing at present.Such as document [Karimian
R,Oraizi H,Fakhte S,et al.Novel F-shaped quad-band printed slot antenna for
WLAN and WiMAX MIMO systems[J].Antennas and Wireless Propagation Letters,
IEEE,2013,12:405-408.] be F shapes gap structure constitute WLAN/WiMAX multiport mimo antennas design and research
Multifrequency antenna, and with 4 symmetric feeds ports, while the mimo antenna with diversity performance is realized, but this structure day
The isolation of line is smaller, and its value is less than 20dB.Document [Vallecchi A, Gentili G B.Design of dual-
polarized series-fed microstrip arrays with low losses and high polarization
purity[J].IEEE Transactions on Antennas and Propagation,2005,53(5):1791-
1798.] a kind of multi-polarization antenna of multiple H-shaped gaps concatenation of utilization couple feed is proposed, but antenna structure is complicated, and be
Bidirectional radiation.
The content of the invention
It is an object of the invention to provide a kind of simple structure, at the same working frequency range have interport isolation higher and
Good directionality, it is adaptable to the three port mimo antennas based on aperture slots in the mimo system of WLAN frequency ranges.
The three port mimo antennas based on aperture slots, including medium substrate, the medium substrate are provided with the upper and lower 2
Individual circular media substrate, is connected between 2 circular media substrates by 3 coaxial lines, and 3 coaxial lines are mutually hexagonal angle and symmetrically divide
Cloth, the outer conductor of coaxial line is fan-shaped golden by the lower surface three of the lower surface metal layer of layer dielectric substrate and upper layer medium substrate
Category layer is connected, and the inner wire of coaxial line is connected with the metal strip layer of the upper surface of upper layer medium substrate；Layer dielectric substrate
Lower surface is coated with metal level；The lower surface of upper layer medium substrate is coated with metal level, and the metal level is by 3 strip gaps etc.
It is divided into three sector regions, each sector region extends internally along the edge on arc side and is provided with a rectangular aperture, top dielectric base
The upper surface of plate is coated with 3 Cyclic dart shape strip metal layers, and 3 Cyclic dart shape strip metal layers are mutually hexagonal angle and symmetrically divide
Cloth.
Further：
The layer dielectric substrate is disc-shaped structure, and radius is 45~61mm, and thickness is 1.1~1.3mm, with respect to dielectric
Constant is 3.0~3.4, and loss tangent is not more than 0.005；The upper layer medium substrate is also disc-shaped structure, and radius is
39~45mm, thickness is identical with layer dielectric substrate；The distance between the layer dielectric substrate and upper layer medium substrate are 2.4
~3.2mm；The outer conductor diameter of 3 coaxial lines is 2.8~3.6mm, a diameter of 0.7~1.1mm of inner wire.
The center of the feed port of each coaxial line to layer dielectric substrate center distance be 30.0~35.8mm.
The length in the strip gap is 40.4~44.4mm, and width is 1.8~2.2mm, the rectangular aperture length
It is 13~17mm, width is 2.5~3.5mm.
The strip metal layer of the Cyclic dart shape is long-armed by one and galianconism is constituted, arm lengths long for 11~
15mm, width is 2.0~3.0mm, and a length of 6.5~10.5mm of galianconism, width is situated between with long-armed width, long-armed left side to upper strata
The distance of matter substrate center is 29.6~33.6mm, and the long-armed angle α with galianconism is 150 °.
Compared with the prior art, the present invention has the advantages that following prominent and significant effect：
The present invention is to combine three terminal port antennaes that coaxial feed is realized by the combination of multiple aperture slots.Using open seam
Gap structure causes that antenna is not only simple in structure, meanwhile, in working frequency range, antenna also has interport isolation higher and good
Directionality.The present invention is suitable for the mimo system of WLAN frequency ranges.
Brief description of the drawings
Fig. 1 is the side structure schematic view of the embodiment of the present invention.
Fig. 2 is the overlooking the structure diagram of the layer dielectric base lower surface of the embodiment of the present invention.
Fig. 3 is the overlooking the structure diagram of the upper layer medium substrate lower surface of the embodiment of the present invention.
Fig. 4 is the top view of the upper layer medium substrate upper surface of the embodiment of the present invention.
Fig. 5 is the return loss plot figure of three ports of embodiment of the present invention antenna.In Fig. 5, curve a is that antenna echo is damaged
Consumption S11 curves；Curve b is antenna return loss S22 curves；Curve c is antenna return loss S33 curves.
Fig. 6 is the isolation curve map between each port of the antenna of the embodiment of the present invention.
Fig. 7 is antenna E faces directional diagram when the first port of the embodiment of the present invention is encouraged.
Fig. 8 is antenna H faces directional diagram when the first port of the embodiment of the present invention is encouraged.
Specific embodiment
Below in conjunction with drawings and Examples, the present invention will be described in further detail.
Referring to Fig. 1, the three port mimo antennas based on aperture slots include layer dielectric substrate 1, top dielectric base
Three coaxial lines 3 of plate 2 and identical.The layer dielectric substrate 1 is disc-shaped structure, radius R1 be 48mm (can for 45~
61mm), thickness H is 1.2mm (can be 1.1~1.3mm), and relative dielectric constant is 3.0~3.4, and loss tangent is not more than
0.005；The upper layer medium substrate 2 is also disc-shaped structure, and radius R2 is 42mm (can be 39~45mm), and thickness is situated between with lower floor
Matter substrate 1 is identical；The distance between described layer dielectric substrate 1 and upper layer medium substrate 2 d5 be 2.8mm (can for 2.4~
3.2mm)；The outer conductor diameter R3 of three coaxial lines is 3.2mm (can be 2.8~3.6mm), and inner wire diameter R4 is
0.9mm (can be 0.7~1.1mm).
It is the lower surface top view of layer dielectric substrate 1 referring to Fig. 2.The feed port 4,5,6 of coaxial line is in underlying substrate
On the metal level 7 of lower surface, their center to the center of layer dielectric substrate 1 apart from L1 be 32.9mm (can for 30.0~
35.8mm)。
It is the lower surface top view of upper layer medium substrate 2 referring to Fig. 3.The length L2 in 3 strip gaps 8 of identical is
42.4mm (can be 40.4~44.4mm), width d3 are 2.0mm (can be 1.8~2.2mm).Three described identical rectangular slits
The length d1 of gap 9,10,11 is 15.0mm (can be 13~17mm), and width d2 is 3.0mm (can be 2.5~3.5mm).
It is the upper surface top view of upper layer medium substrate 2 referring to Fig. 4.3 Cyclic dart shape strip metal 12,13,14 knots of layer
Structure is identical, and by a long-armed and galianconism composition, arm lengths L5 long is 13.0mm (can be 11~15mm), and width d4 is
2.5mm (can be 2.0~3.0mm), galianconism L6 long are 8.5mm (can be 6.5~10.5mm), and width is with long-armed width.It is long-armed
Left side be 31.6mm (can be 29.6~33.6mm), the angle α of long-armed and galianconism apart from L4 to the center of upper layer medium substrate 2
It is 150 °.
It is the return loss frequency curve chart of three ports of antenna referring to Fig. 5.Due to structural symmetry, three feedbacks of antenna
The return loss plot of electric port is theoretically identical.From curve a1, b1 and c1, -10dB the echoes of feed port are damaged
Consumption bandwidth range is 2.39~2.47GHz.
It is each interport isolation curve map of antenna referring to Fig. 6.In 2.39~2.47GHz of working band, port 6
And the isolation between 7, as shown in curve a2, its value is more than 20dB, isolating between port 6 and port 8 in working band
Degree, as shown in curve b2, its value be more than 20dB, the isolation between port 7 and port 8, as shown in curve b2, its value is more than
20dB。
Encourage directional diagram when (another two port connects matched load) respectively for antenna first port in Fig. 7~8.Fig. 7 is feedback
The E faces directional diagram of antenna when electric port 4 (or 5 or 6) is encouraged, Fig. 8 is the H face sides of antenna when feed port 4 (or 5 or 6) is encouraged
Xiang Tu.Perpendicular to the plane where antenna element and along Z axis positive axis direction, gain maximum reaches 8dBi, day to main radiation direction
About 60 degree of the main lobe width of line.
Claims (5)
1. the three port mimo antennas based on aperture slots, including medium substrate, it is characterised in that the medium substrate is provided with
Layer and 2 circular media substrates of lower floor, are connected between 2 circular media substrates by 3 coaxial lines, and 3 coaxial lines are mutually
Hexagonal angle is symmetrical, and the outer conductor of coaxial line is by the lower surface metal layer of layer dielectric substrate and the following table of upper layer medium substrate
The fan-shaped metal level in three, face is connected, and the inner wire of coaxial line is connected with the metal strip layer of the upper surface of upper layer medium substrate；Under
The lower surface of layer medium substrate is coated with metal level；The lower surface of upper layer medium substrate is coated with metal level, and the metal level is by 3
Strip gap is divided into three sector regions, and each sector region extends internally along the edge on arc side and is provided with a rectangular slits
Gap, the upper surface of upper layer medium substrate is coated with 3 Cyclic dart shape strip metal layers, and 3 Cyclic dart shape strip metal layers are mutually
Hexagonal angle is symmetrical.
2. three port mimo antennas of aperture slots are based on as claimed in claim 1, it is characterised in that the layer dielectric substrate
It is disc-shaped structure, radius is 45~61mm, and thickness is 1.1~1.3mm, and relative dielectric constant is 3.0~3.4, and loss angle is just
Cut value and be not more than 0.005；The upper layer medium substrate is also disc-shaped structure, and radius is 39~45mm, thickness and layer dielectric
Substrate is identical；The distance between the layer dielectric substrate and upper layer medium substrate are 2.4~3.2mm；3 coaxial lines
Outer conductor diameter is 2.8~3.6mm, a diameter of 0.7~1.1mm of inner wire.
3. three port mimo antennas of aperture slots are based on as claimed in claim 1, it is characterised in that the feedback of each coaxial line
The center of electric port to layer dielectric substrate center distance be 30.0~35.8mm.
4. three port mimo antennas of aperture slots are based on as claimed in claim 1, it is characterised in that the strip gap
Length be 40.4~44.4mm, width be 1.8~2.2mm, the rectangular aperture length be 13~17mm, width be 2.5~
3.5mm。
5. three port mimo antennas of aperture slots are based on as claimed in claim 1, it is characterised in that the bar of the Cyclic dart shape
Shape metal level is long-armed by one and a galianconism is constituted, and arm lengths long are 11~15mm, and width is 2.0~3.0mm, and galianconism is a length of
6.5~10.5mm, width with long-armed width, the distance in long-armed left side to upper layer medium substrate center for 29.6~
33.6mm, the long-armed angle α with galianconism is 150 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710035301.1A CN106816704B (en) | 2017-01-17 | 2017-01-17 | The three port mimo antennas based on aperture slots |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710035301.1A CN106816704B (en) | 2017-01-17 | 2017-01-17 | The three port mimo antennas based on aperture slots |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106816704A true CN106816704A (en) | 2017-06-09 |
| CN106816704B CN106816704B (en) | 2019-07-02 |
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| CN201710035301.1A Expired - Fee Related CN106816704B (en) | 2017-01-17 | 2017-01-17 | The three port mimo antennas based on aperture slots |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107732443A (en) * | 2017-09-14 | 2018-02-23 | 电子科技大学 | A kind of high-isolation double work state dual polarization ultra wide band mimo antenna |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120139806A1 (en) * | 2010-12-02 | 2012-06-07 | Ying Zhan | IFS BEAMFORMING ANTENNA FOR IEEE 802.11n MIMO APPLICATIONS |
| CN103094692A (en) * | 2011-11-03 | 2013-05-08 | 仁宝电脑工业股份有限公司 | Slot antenna |
| CN106233532A (en) * | 2014-02-18 | 2016-12-14 | 菲尔特罗尼克无线公司 | Broad-band antenna, multiband antenna unit and aerial array |
-
2017
- 2017-01-17 CN CN201710035301.1A patent/CN106816704B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120139806A1 (en) * | 2010-12-02 | 2012-06-07 | Ying Zhan | IFS BEAMFORMING ANTENNA FOR IEEE 802.11n MIMO APPLICATIONS |
| CN103094692A (en) * | 2011-11-03 | 2013-05-08 | 仁宝电脑工业股份有限公司 | Slot antenna |
| CN106233532A (en) * | 2014-02-18 | 2016-12-14 | 菲尔特罗尼克无线公司 | Broad-band antenna, multiband antenna unit and aerial array |
Non-Patent Citations (1)
| Title |
|---|
| 任凌云等: "《小型宽带开口缝隙天线设计》", 《电子元件应用》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107732443A (en) * | 2017-09-14 | 2018-02-23 | 电子科技大学 | A kind of high-isolation double work state dual polarization ultra wide band mimo antenna |
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| CN106816704B (en) | 2019-07-02 |
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Granted publication date: 20190702 |