CN108767453A - A kind of flexibility ultra wide band mimo antenna - Google Patents
A kind of flexibility ultra wide band mimo antenna Download PDFInfo
- Publication number
- CN108767453A CN108767453A CN201810385655.3A CN201810385655A CN108767453A CN 108767453 A CN108767453 A CN 108767453A CN 201810385655 A CN201810385655 A CN 201810385655A CN 108767453 A CN108767453 A CN 108767453A
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- patch
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- circular arc
- ultra wide
- wide band
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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
- H01Q1/50—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
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
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Abstract
The present invention proposes a kind of flexible ultra wide band mimo antenna, isolation for improving ultra wide band mimo antenna, the band limits of extended antenna, including fexible film dielectric-slab (1), and it is printed on the radiating element (2) of the dielectric-slab upper surface and the radiation floor (3) of lower surface；Radiating element (2) is using the centrosymmetric structure being made of four the first radiation patch (21), the shape of wherein the first radiation patch (21) is spliced by a plurality of circular curve, and each first radiation patch (21) respectively connects a feed line (4)；Radiation floor (3) is using the centrosymmetric structure being made of four the second radiation patch (31), wherein the second radiation patch (31) is spliced by the first rectangular patch (311) and the second rectangular patch (312).The present invention's is small, and isolation is high, and frequency range is wide, is easy to integration of equipments, is suitable for wireless communication technology field.
Description
Technical field
The invention belongs to antenna technical fields, are related to a kind of flexible ultra wide band mimo antenna, are suitable for wireless communication technique
Field.
Background technology
In recent years, with the development of wireless communication technique, the problem of frequency spectrum resource shortage is more serious, and ultra-wideband antenna
It has certain effect to solving frequency spectrum resource shortage.Ultra-wideband antenna is a kind of antenna of the relative bandwidth more than 20%, opposite band
Width refers to Specifeca tion speeification of the antenna in the frequency range that can meet design objective requirement, such as input impedance, directional diagram, increasing
Benefit, main lobe width and minor level etc., under normal circumstances, antenna performance parameters vary with frequency.It wirelessly communicates simultaneously
The fast development of technology, it is more and more for the functional requirement of communication equipment so that the device integrated on same communication equipment
It is more and more, in order to reduce cost as far as possible, reduce communication equipment volume, antenna as device important in communication equipment,
The demand of miniaturization seems particularly urgent.
The advantages that flexible antennas is small since it is inexpensive, easy of integration and design flexibility is in wireless communication field
Cause extensive concern, and ink-jet mode is as a kind of efficient electronic circuit manufacture method, it is good because its work period is short
Production is multi-functional and inexpensive, and be widely used potential in flexible antennas design.
For the problem of frequency spectrum resource shortage, ultra wide band mimo antenna is undoubtedly one as a kind of multi-input/output antenna
Kind good selection, ultra wide band mimo antenna are made of mutiple antennas unit, due to intercoupling between each unit,
Its impedance bandwidth and isolation are the Specifeca tion speeifications of ultra wide band mimo antenna, in the premise for ensureing that relative bandwidth is more than 20%
Under, isolation is improved as far as possible, can effectively improve the anti-multipath fading ability of mimo antenna, can need not increase frequency
In the case of spectral limit and transmission power, increase message capacity.
Since traditional ultra wide band mimo antenna band limits is small, volume is big, and the low disadvantage of isolation can influence ultra wide band
The performance of mimo antenna limits the application range of ultra wide band mimo antenna.It is to increase medium to increase bandwidth simple effective method
Thickness and reduce the relative permittivity value of substrate, but dielectric thickness crosses the apparent excitation that conference causes surface wave, and can
Some higher modes can be excited in thickness direction, this can reduce radiation efficiency, and antenna pattern is made to deteriorate.Mimo antenna can lead to
Adding unit interval is crossed to improve isolation, but excessively high unit interval can not only influence the impedance bandwidth of mimo antenna, dislike
Change antenna pattern, and the volume of mimo antenna can be increased, and reduce the volume of ultra wide band mimo antenna, and impedance can be changed
Bandwidth, while influencing antenna performance.Therefore, how to ensure ultra wide band mimo antenna under the premise of miniaturization, extending bandwidth model
It encloses, it is a critical issue urgently to be resolved hurrily to improve isolation.
Each unit adds independent feed port in ultra wide band mimo antenna, by feed port input signal,
Radio frequency electromagnetic field has been encouraged between conductor patch and earth plate, and passes through the outside spoke in gap between patch surrounding and earth plate
It penetrates.Such as application publication number be 106282871 A of CN, entitled " a kind of four unit ultra wide band mimo antenna of compact " it is special
Profit application, discloses a kind of four unit ultra wide band mimo antenna of compact, is provided with four kinds of identical radiating elements and four phases
Same inverted L-shaped floor minor matters, are individually placed to four corner positions of dielectric-slab, and the long side and radiating element of L-shaped floor minor matters
It overlaps, the two-sided double microstrip line constructions of composition, between the adjacent radiation unit of dielectric-slab long side side on floor with being provided with two groups
Plate stitch gap, S11 parameters are both less than -10dB in frequency range 3~10GHz frequency ranges, and isolation is in 3~10GHz frequency bands only in 15dB
Left and right, which realizes miniaturization and ultra wide band characteristic, but has a defect that isolation is relatively low, and band limits is relatively narrow.
Invention content
It is an object of the invention to overcome the problems of the above-mentioned prior art, it is proposed that a kind of flexibility ultra wide band MIMO days
Line, the isolation for improving ultra wide band mimo antenna, and the band limits of extended antenna.
A kind of flexibility ultra wide band mimo antenna, including fexible film dielectric-slab 1, and it is printed on the dielectric-slab upper surface
Radiating element 2 and the radiation floor of lower surface 3；The radiating element 2 is using the center being made of four the first radiation patch 21
The shape of symmetrical structure, first radiation patch 21 is spliced by a plurality of circular curve, and each first radiation patch 21 is each
Connect a feed line 4；The radiation floor 3 is described using the centrosymmetric structure being made of four the second radiation patch 31
Second radiation patch 31 is spliced by the first rectangular patch 311 and the second rectangular patch 312.
A kind of above-mentioned flexible ultra wide band mimo antenna, the radiation floor 3, the second adjacent radiation patch 31 is orthogonal,
Cross row band structure is formed, the width W1 for forming the first rectangular patch 311 of the second radiation patch 31 is less than the second rectangular patch
312 width Wg.
A kind of above-mentioned flexible ultra wide band mimo antenna, first radiation patch 21, shape are used by oval circular arc
211, the pincer structure that two the first circular arcs, 212, two the second circular arcs 213 and third circular arc 214 are spliced, wherein oval circle
The major semiaxis r3 of arc 211 is equal to 2 times of semi-minor axis r4, and the radius r1 of the second circular arc 213 is less than the radius r2 of third circular arc 214, the
The central angle θ of two circular arcs 2131Less than the central angle θ of third circular arc 2142。
A kind of above-mentioned flexible ultra wide band mimo antenna, the radiating element 2, the center of central symmetry axis and radiation ground 3
Symmetrical overlapping of axles, wherein the blank space that four the first radiation patch 21 are located at the formation of four the second radiation patch 31 is spatially right
The position answered, and third circular arc 214 and the second rectangular patch 312 are tangent, the first circular arc 212 and the first rectangular patch 311 are tangent.
A kind of above-mentioned flexible ultra wide band mimo antenna, the feed line 4, the minor axis lies orthogonal with oval circular arc 211, while with
Third circular arc 214 is tangent, and the length L3 of the feed line 4 is equal with the length Lg of the second rectangular patch 312.
A kind of above-mentioned flexible ultra wide band mimo antenna, the fexible film dielectric-slab 1, the radiating element of upper surface printing
2 and lower surface printing radiation floor 3, realized using ink-jet mode.
Compared with prior art, the present invention having the following advantages that：
1, radiation floor of the invention uses the centrosymmetric structure being made of four the second radiation patch, wherein the second spoke
It penetrates patch to be spliced by the first rectangular patch and the second rectangular patch, and the second radiation patch adjacent in radiation floor is just
It hands over, forms cross row band structure, which can change the impedance operator of antenna, to inhibit mutual between unit
Coupling, effectively improves the isolation of antenna, and the isolation of antenna is made to be more than 25dB in 3.27~13GHz of frequency range.
2, radiating element of the invention is made of four the first radiation patch, and the first radiation patch uses shape by a plurality of
The pincerlike symmetrical structure that circular curve is spliced, the pincer symmetrical structure can not only extend the conducting path of electric current, increase
Multiple resonance points obtain compact antenna structure, and the impedance bandwidth of antenna with the frequency range of extended antenna, can be made in frequency
It is more than 10dB in band 3.07GHz~13GHz.
3, the present invention uses Kapton fexible film dielectric-slabs, using ink-jet mode in fexible film dielectric-slab upper and lower surface
Radiating element and radiation floor are printed respectively, are belonged to and are realized printing ultra wide band mimo antenna on fexible film dielectric-slab for the first time,
Make antenna easily and integration of equipments.
Description of the drawings
Fig. 1 is the overall structure diagram of the present invention；
Fig. 2 is the structural schematic diagram of radiation floor of the present invention；
Fig. 3 is the structural schematic diagram of the first radiation patch of the invention；
Fig. 4 is the structural schematic diagram of radiating element of the present invention；
Fig. 5 is the S11 simulation results that radiation floor of the present invention does not use cross band structure using cross band structure and
Figure；
Fig. 6 is S21, S31, S41 that radiation floor of the present invention does not use cross band structure using cross band structure and
Simulation result diagram.
Specific implementation mode
In the following with reference to the drawings and specific embodiments, present invention is further described in detail：
Referring to Fig.1, a kind of flexible ultra wide band mimo antenna proposed by the present invention, including fexible film dielectric-slab 1, radiation list
Member 2, radiation floor 3 and feed line 4.
Radiating element 2 is printed on fexible film Jie using the centrosymmetric structure being made of four the first radiation patch 21
The upper surface of scutum 1, and the central symmetry overlapping of axles of the central symmetry axis of the radiating element 2 and radiation floor 3.Radiation floor 3
Using the centrosymmetric structure being made of four the second radiation patch 31, it is printed on the lower surface of fexible film dielectric-slab 1.It is flexible
Thin film dielectrics plate 1 uses Kapton flexible thin-film materials, relative dielectric constant εr=3.4, overall dimensions be 65mm × 65mm ×
0.125mm。
With reference to Fig. 2, the second radiation patch 31 is spliced by the first rectangular patch 311 and the second rectangular patch 312, and first
The width W1=2.0mm of rectangular patch 311, length L1=22.9mm, the width Wg=10.6mm of the second rectangular patch 312, it is long
Lg=5.6mm is spent, and the second radiation patch 31 adjacent in radiation floor 3 is orthogonal, forms cross row band structure, which can be with
The impedance operator for changing antenna effectively improves the isolation of antenna to inhibit intercoupling between unit.
With reference to Fig. 3, the first radiation patch 21 using shape by an oval circular arc 211, two the first circular arcs 212, two
The pincerlike symmetrical structure that second circular arc 213 and third circular arc 214 are spliced, wherein the major semiaxis r3=of oval circular arc 211
15.0mm, semi-minor axis r4=7.5mm, the radius r1=2.4mm of the second circular arc 212, the radius r2=of third circular arc 213
11.4mm, central angle θ2=67 °, which can not only extend the conducting path of electric current, increase multiple resonance points, effectively
Bandwidth is widened, obtains compact antenna structure, and can be with the frequency range of extended antenna.
With reference to Fig. 4, four the first radiation patch 21 are located at the blank of four the second radiation patch 31 formation in radiating element 2
It is in spatially corresponding position, wherein 21 concrete structure of the first radiation patch is as shown in figure 4, wherein third circular arc 214 and
Two rectangular patches 312 are tangent, and the first circular arc 212 and the first rectangular patch 311 are tangent, while each first radiation patch 21 respectively connects
Connect a feed line 4, the length L3=5.6mm of feed line 4, width W3=0.3mm, and feed line 4 and 214 phase of third circular arc
Hand over, at the same with the minor axis lies orthogonal of oval circular arc 211, by 4 input signal of feed line, in radiating element 2 and radiation ground
Radio frequency electromagnetic field is encouraged between plate 2, and by the gap between 2 surrounding of radiating element and radiation floor 3 to external radiation.
The effect of the present invention is described further in combination with simulation result：
1, emulation content
1.1 do not use above-mentioned radiation floor using cross band structure and using business simulation software HFSS_13.0 ten
The S11 parameters of font band structure carry out simulation calculation, and the results are shown in Figure 5.
1.2 do not use above-mentioned radiation floor using cross band structure and using business simulation software HFSS_13.0 ten
S21, S31, S41 parameter of font band structure carry out simulation calculation, and the results are shown in Figure 6.
2, analysis of simulation result
With reference to Fig. 5, with S11<- 10dB be standard, radiation floor use the impedance bandwidth of the antenna of cross row band structure for
3.07GHz~13GHz does not use the impedance bandwidth of the antenna of cross row band structure for 3.27GHz~13GHz.
With reference to Fig. 6, radiation floor is using the isolation of the antenna of cross row band structure in frequency range 3.27GHz~13GHz
More than 25dB, the isolation of the antenna of cross row band structure is not used to be more than 25dB, therefore spoke only in frequency range 6GHz~13GHz
The isolation of antenna can be effectively increased using the antenna of cross row band structure by penetrating floor.
The above simulation result explanation, inventive antenna have ideal impedance bandwidth and isolation, and object test knot
Fruit coincide with simulation result.
Claims (6)
1. a kind of flexibility ultra wide band mimo antenna, which is characterized in that including fexible film dielectric-slab (1), and be printed on Jie
The radiating element (2) of scutum upper surface and the radiation floor (3) of lower surface；The radiating element (2) is using by four the first spokes
Penetrate the centrosymmetric structure of patch (21) composition, the shape of first radiation patch (21) spliced by a plurality of circular curve and
At each first radiation patch (21) respectively connects a feed line (4)；The radiation floor (3) radiates using by four second
The centrosymmetric structure of patch (31) composition, second radiation patch (31) is by the first rectangular patch (311) and the second rectangle
Patch (312) is spliced.
2. a kind of flexible ultra wide band mimo antenna according to claim 1, which is characterized in that the radiation floor (3),
Adjacent the second radiation patch (31) is orthogonal, forms cross row band structure, the first rectangle patch of the second radiation patch of composition (31)
The width W1 of piece (311) is less than the width Wg of the second rectangular patch (312).
3. according to a kind of flexible ultra wide band mimo antenna described in claim 1, which is characterized in that first radiation patch
(21), shape is used by oval circular arc (211), two the first circular arcs (212), two the second circular arcs (213) and third circular arc
(214) pincer structure being spliced, wherein the major semiaxis r3 of oval circular arc (211) is equal to 2 times of semi-minor axis r4, the second circular arc
(213) radius r1 is less than the radius r2, the central angle θ of the second circular arc (213) of third circular arc (214)1Less than third circular arc
(214) central angle θ2。
4. a kind of flexible ultra wide band mimo antenna according to claim 3, which is characterized in that the radiating element (2),
The central symmetry overlapping of axles of central symmetry axis and radiation floor (3), wherein four the first radiation patch (21) are located at four second
The blank space that radiation patch (31) is formed spatially corresponding position, and third circular arc (214) and the second rectangular patch (312)
Tangent, the first circular arc (212) and the first rectangular patch (311) are tangent.
5. a kind of flexible ultra wide band mimo antenna according to claim 4, which is characterized in that the feed line (4) is and ellipse
The minor axis lies orthogonal of round arc (211), at the same it is tangent with third circular arc (214), and the length L3 and the second square of the feed line (4)
The length Lg of shape patch (312) is equal.
6. a kind of flexible ultra wide band mimo antenna according to claim 1, which is characterized in that the fexible film dielectric-slab
(1), the radiation floor (3) of the radiating element (2) of upper surface printing and lower surface printing, is realized using ink-jet mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810385655.3A CN108767453A (en) | 2018-04-26 | 2018-04-26 | A kind of flexibility ultra wide band mimo antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810385655.3A CN108767453A (en) | 2018-04-26 | 2018-04-26 | A kind of flexibility ultra wide band mimo antenna |
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| Publication Number | Publication Date |
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| CN108767453A true CN108767453A (en) | 2018-11-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810385655.3A Pending CN108767453A (en) | 2018-04-26 | 2018-04-26 | A kind of flexibility ultra wide band mimo antenna |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109755729A (en) * | 2018-12-11 | 2019-05-14 | 上海电力学院 | A kind of dual-attenuation ultra wide band mimo antenna flexible |
| CN114243273A (en) * | 2021-12-15 | 2022-03-25 | 杭州电子科技大学 | Compact four-unit ultra-wideband MIMO antenna |
| CN117878597A (en) * | 2024-03-12 | 2024-04-12 | 湖南大学 | Ultra-wideband MIMO antenna with high isolation characteristic |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109755729A (en) * | 2018-12-11 | 2019-05-14 | 上海电力学院 | A kind of dual-attenuation ultra wide band mimo antenna flexible |
| CN114243273A (en) * | 2021-12-15 | 2022-03-25 | 杭州电子科技大学 | Compact four-unit ultra-wideband MIMO antenna |
| CN114243273B (en) * | 2021-12-15 | 2024-01-30 | 杭州电子科技大学 | Compact four-unit ultra-wideband MIMO antenna |
| CN117878597A (en) * | 2024-03-12 | 2024-04-12 | 湖南大学 | Ultra-wideband MIMO antenna with high isolation characteristic |
| CN117878597B (en) * | 2024-03-12 | 2024-05-14 | 湖南大学 | Ultra-wideband MIMO antenna with high isolation characteristic |
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