CN108598629A - A kind of vortex electromagnetic wave mode converting means - Google Patents
A kind of vortex electromagnetic wave mode converting means Download PDFInfo
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- CN108598629A CN108598629A CN201810297114.5A CN201810297114A CN108598629A CN 108598629 A CN108598629 A CN 108598629A CN 201810297114 A CN201810297114 A CN 201810297114A CN 108598629 A CN108598629 A CN 108598629A
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- electromagnetism
- metallic plate
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- electromagnetic wave
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
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Abstract
The invention belongs to wireless communication technology fields, disclose a kind of vortex electromagnetic wave mode converting means, and vortex electromagnetism wave generation device is located at the metallic plate side of the super surface cell of electromagnetism, and is fixed by the bracket on the central axis that electromagnetism surpasses surface cell；The super surface cell of electromagnetism of the present invention is layered on top of each other by four and non-touching metallic plate forms, the cross groove of periodic arrangement is etched on metallic plate, the equivalent capacity and inductance that vortex electromagnetic wave passes through phase mutual resonance generation between the super surface cell cross groove of each electromagnetism, it realizes phase compensation, and then changes the phase distribution on vortex electromagnetic wave cross section, complete the conversion to vortex electromagnetic wave mode, compared with prior art, it occupies little space, it is simple in structure, it is easy to implement.Phase in the present invention in the super surface cell of electromagnetism can carry out independent adjustment, by changing the size of cross groove on metallic plate, realize different phase compensation, be easy to regulate and control, design freedom is big.
Description
Technical field
The invention belongs to wireless communication technology field more particularly to a kind of vortex electromagnetic wave mode converting means.
Background technology
Currently, the prior art commonly used in the trade is such：With the high speed development of wireless communication technique, wireless communication system
The distributed frequency spectrum of system becomes abnormal crowded, the poor problem getting worse of frequency spectrum resource, it has also become wireless mobile communications and clothes
The bottleneck of sustainable development is applied in business.For the contradiction for alleviating between frequency spectrum resource and growing wireless traffic demand, nothing is recognized
Line power technology comes into being.But space physics research institute of Sweden Bo Thide professors et al. look for another way, will be a branch of by experiment
Electromagnetic wave is twisted into a branch of vortex electromagnetic wave, and proposes the imagination for being used to increase wireless communication capacity using vortex electromagnetic wave.
Using the orbital angular momentum of electromagnetic wave i.e. by distorting electromagnetic wave, the capacity of wireless communication can be substantially improved.In general,
Same frequency can only transmission of one line information.And here, they are encoded by the different orbital angular momentums to electromagnetic wave, even if
In actual environment, same frequency transmitting multiplex information can be also realized, this is possible to significantly promote existing wireless communication
Capacity.It theoretically, even if can be if this new wireless communication technique without using polarization or in the case of dense coding technology
Infinite number of transmission is realized within the scope of a certain fixed frequency band, this wireless communication spectrum congested problem to become increasingly conspicuous to solution
Provide a completely new resolving ideas.In recent years, the vortex electromagnetic wave for carrying orbital angular momentum has obtained extensively in many fields
General application and research, but in the experiment of millimeter wave, microwave frequency band, there are no a highly desirable experiment link models so far.
In terms of the generation of vortex electromagnetic wave, mainly there are reflecting helix face structure, transmission grating structure, transmission helical structure and spiral to throw
Object plane antenna etc..But these types of antenna can only just generate the vortex electromagnetic wave of single mode once being shaped by manufacture, application
Range is extremely limited.
In conclusion problem of the existing technology is：Antenna can only just generate single mode once being shaped by manufacture
Vortex electromagnetic wave, if base station needs to emit the vortex electromagnetic wave of multiple and different mode, it is necessary to use corresponding mode quantity
Antenna, waste of resource and intricate operation.
Solve the difficulty and meaning of above-mentioned technical problem：If an antenna can generate the vortex electromagnetism of multiple mode
Wave, this will greatly reduce the number of transmission antennas of base station, saves the time for replacing antenna, improves the emission rate of data.
Invention content
In view of the problems of the existing technology, the present invention provides a kind of vortex electromagnetic wave mode converting means.
The invention is realized in this way a kind of vortex electromagnetic wave mode converting means, the vortex electromagnetic wave modal transformation
Device includes the super surface cell of electromagnetism, vortex electromagnetism wave generation device；
Vortex electromagnetism wave generation device is located at the metallic plate side of the super surface cell of electromagnetism, and is fixed by the bracket in electromagnetism
On the central axis of super surface cell；At the upper surface center of the super surface cell of electromagnetism cartesian coordinate is established for coordinate origin
System, the faces xOy are parallel with the horizontal plane of the super surface cell of electromagnetism and y is parallel with a certain length of side of the super surface cell of electromagnetism, and be vortexed electricity
Magnetic wave generation device uses tranmitting frequency for the antenna of 10GHz；Distance is between center of antenna and coordinate origin
Further, it is 320 × 320mm that the metallic plate, which uses rectangular parallelepiped structure, thickness 0.3mm, upper surface size,；Gold
It is 6.64mm to belong to the distance between plate.
Further, the super surface cell of metallic plate electromagnetism includes stacking gradually and non-touching first metallic plate, the
Two metallic plates, third metallic plate, the 4th metallic plate, are fixed by resin scaffold.
Further, first metallic plate, the second metallic plate, third metallic plate, etching cycle row on the 4th metallic plate
The M of cloth × N number of cross groove, the center of each each row cross row groove of row is in an axis parallel with the metallic plate upper surface length of side
On；Second metallic plate, third metallic plate and the 4th metallic plate and the arrangement mode of cross groove, number in the first metallic plate are equal
It is identical.
Further, first metallic plate, the second metallic plate, third metallic plate and the 4th metallic plate form periodic arrangement
M × super surface cell of N number of electromagnetism, the length of side of each unit is 0.533 λ=16mm, wherein the center of four cross grooves
Point is respectively positioned on the central shaft of the super surface cell of electromagnetism.
Further, the super surface cell center relative position of each electromagnetism position opposite with cross groove center on the first metallic plate
It sets unanimously, is expressed as：
Wherein, m is expert at by the super surface cell of electromagnetism, n be the super surface cell column of electromagnetism, m=1,2 ..., 20, n=
1,2 ..., 20, D be the spacing at two adjacent super surface cell centers of electromagnetism,For in the super surface cell of m rows the n-th row electromagnetism
Heart relative position.
Further, the cross etched on first metallic plate, the second metallic plate, third metallic plate and the 4th metallic plate
The size of groove surpasses the compensation phase ψ of surface cell in electromagnetismmnMeet：
Wherein, m is expert at by the super surface cell of electromagnetism, and n is the super surface cell column of electromagnetism, m=1,2 ..., M, n=
1,2 ..., N, l=1,2 ..., l represent vortex electromagnetic wave and pass through the increased mode number of modal transformation lens, and K is phase correction, when
m>M/2, n>When N/2, K=0；Work as m>M/2, n<When N/2, K=270；Work as m<M/2, n>When N/2, K=90；Work as m<M/2, n<N/2
When, K=180.Required compensation phase ψmnBetween 0~2 π, according to the compensation phase of the super surface cell of m rows the n-th row electromagnetism
Value ψmnDraw the phase distribution figure of the super surface cell of all electromagnetism.
In conclusion advantages of the present invention and good effect are：The super surface cell of electromagnetism of the present invention is by four phase alternating layers
Folded and non-touching metallic plate forms, and the cross groove of periodic arrangement is etched on metallic plate, and vortex electromagnetic wave passes through
The equivalent capacity and inductance that phase mutual resonance generates between each super surface cell cross groove of electromagnetism, realize phase compensation, in turn
Change the phase distribution on vortex electromagnetic wave cross section, completes the conversion to vortex electromagnetic wave mode and account for compared with prior art
It is small with space, it is simple in structure, it is easy to implement.Phase in the present invention in the super surface cell of electromagnetism can carry out independent adjustment, pass through
The size for changing cross groove on metallic plate, realizes different phase compensation, is easy to regulate and control, design freedom is big.
Description of the drawings
Fig. 1 is vortex electromagnetic wave mode converting means structural schematic diagram provided in an embodiment of the present invention；
In figure：1, the super surface cell of electromagnetism；1-1, the first metallic plate；1-2, the second metallic plate；1-3, third metallic plate；1-
4, the 4th metallic plate；2, vortex electromagnetism wave generation device.
Fig. 2 is the structural schematic diagram of the first metallic plate provided in an embodiment of the present invention.
Fig. 3 is the phase distribution schematic diagram of all super surface cells of electromagnetism of the present invention.
Fig. 4 is the phase distribution signal in yoz planes when mesoscale eddies electromagnetic wave of the present invention surpasses surface cell without electromagnetism
Figure.
Fig. 5 is phase distribution schematic diagram of the mesoscale eddies electromagnetic wave of the present invention after electromagnetism surpasses surface cell in yoz planes.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
Originally a kind of vortex electromagnetic wave mode converting means is proposed, may be implemented to realize vortex with a passive super surface
The arbitrary conversion of electromagnetic wave mode solves the problems, such as that the prior art can only generate the super surface of single mode.
As shown in Figure 1, vortex electromagnetic wave mode converting means provided in an embodiment of the present invention includes：The super surface cell of electromagnetism
1, vortex electromagnetism wave generation device 2.
The super surface cell 1 of electromagnetism includes stacking gradually and non-touching first metallic plate 1-1, the second metallic plate 1-2, the
Three metallic plate 1-3 and the 4th metallic plate 1-4, and fixed by resin scaffold.Second metallic plate 1-2, third metallic plate 1-3 and
The arrangement mode of cross groove, number all same in 4th metallic plate 1-4 and the first metallic plate.
The application principle of the present invention is further described below in conjunction with the accompanying drawings.
As shown in Figure 1, vortex electromagnetic wave mode conversion equipment provided in an embodiment of the present invention includes the super surface cell of electromagnetism 1
With vortex electromagnetism wave generation device 2, is surpassed using electromagnetism and establish cartesian coordinate as coordinate origin at the upper surface center of surface cell 1
System, the faces xOy are parallel with the horizontal plane of the super surface cell of electromagnetism and y is parallel with a certain length of side of the super surface cell of electromagnetism, and be vortexed electricity
Magnetic wave generation device uses tranmitting frequency for the antenna of 10GHz.
The super surface cell 1 of electromagnetism, including stack gradually and non-touching first metallic plate 1-1, the second metallic plate 1-2,
Third metallic plate 1-3 and the 4th metallic plate 1-4, and fixed by resin scaffold, each metallic plate uses rectangular parallelepiped structure, thickness
For 0.3mm, upper surface size is 320 × 320mm, and the distance between metallic plate is 6.64mm, humorous between cross groove
It shakes and provides space.First metallic plate 1-1, structure is as shown in Fig. 2, etching cycle is arranged on its metallic plate 20 × 20
Cross groove, the center of each each row cross row groove of row on an axis parallel with the metallic plate upper surface length of side, groove
Effect is that vortex electromagnetic wave is allow to surpass surface cell by electromagnetism.Second metallic plate 1-2, third metallic plate 1-3 and the 4th gold medal
Belong to the arrangement mode of cross groove, number all same in plate 1-4 and the first metallic plate.
In the present embodiment, the first metallic plate 1-1, the second metallic plate 1-2, third metallic plate 1-3 and the 4th metallic plate
1-4 forms 20 × 20 super surface cells of electromagnetism of periodic arrangement, and the size of each super surface cell is 16 × 16mm, wherein four
The central point of a cross groove is respectively positioned on the central shaft of the super surface cell of the electromagnetism, at this point, the super surface cell of each electromagnetism
Parameter is all identical, is easy to the making of the super surface cell of electromagnetism.And the super surface cell center relative position of each electromagnetism and first at this time
Cross groove center relative position is consistent on metallic plate, is expressed as：
Wherein, m is expert at by the super surface cell of the electromagnetism, n be the super surface cell column of the electromagnetism, m=1,
2 ..., 20, n=1,2 ..., 20, D be the spacing at two adjacent super surface cell centers of electromagnetism,It is super for m rows the n-th row electromagnetism
Surface cell center relative position.
Vortex electromagnetism wave generation device 2 is located at the super 1 each metallic plate side of surface cell of electromagnetism, and is fixed by the bracket in electricity
On the central axis of the super surface cell of magnetic 1, the distance between center of antenna and coordinate origin is enabled to be
The cross etched on first metallic plate 1-1, the second metallic plate 1-2, third metallic plate 1-3 and the 4th metallic plate 1-4
The size of connected in star is the compensation phase ψ for surpassing surface cell in electromagnetismmnUnder the premise of meeting following condition, pass through emulation experiment
Determining, compensation phase ψmnMeet：
Wherein, m is expert at by the super surface cell of electromagnetism, n be the super surface cell column of electromagnetism, m=1,2 ..., 20, n=
1,2 ..., 20, l=1,2 ..., l represent vortex electromagnetic wave and pass through the increased mode number of modal transformation lens, and K is phase correction,
Work as m>10, n>When 10, K=0；Work as m>10, n<When 10, K=270；Work as m<10, n>When 10, K=90；Work as m<10, n<When 10, K=
180, λ=30mm is vortex electromagnetic wave operation wavelength, required compensation phase ψmnBetween 0-2 π, according to m rows the n-th row electromagnetism
The compensation phase value ψ of super surface cellmnThe phase distribution figure for drawing the super surface cell of all electromagnetism, as shown in figure 4, in Fig. 4
Abscissa represents position of the super surface cell of each electromagnetism in x-axis, and ordinate represents the position of the super surface cell of each electromagnetism on the y axis
It sets, shade represents the size of the super surface cell compensation phase of each electromagnetism, real by emulating after determining compensation phase
It tests, gradually changes the size of cross groove so that for cross groove in a certain size, emulation gained compensation phase is above-mentioned
Desired value, this size are the size of required cross groove.
It is the phase point when vortex electromagnetic wave surpasses surface cell without electromagnetism in yoz planes with reference to Fig. 4 and Fig. 5, Fig. 4
Cloth, Fig. 5 are phase distribution of the vortex electromagnetic wave after electromagnetism surpasses surface cell in yoz planes, and comparing Fig. 4 and Fig. 5 can see
Go out, the vortex wave beam of Fig. 5 is 2 mode, to illustrate the super surface cell of the electromagnetism, it can be achieved that vortex electromagnetic wave mode turns
It changes.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (7)
1. a kind of vortex electromagnetic wave mode converting means, which is characterized in that the vortex electromagnetic wave mode converting means includes electricity
The super surface cell of magnetic, vortex electromagnetism wave generation device；
Vortex electromagnetism wave generation device is located at the metallic plate side of the super surface cell of electromagnetism, and is fixed by the bracket and surpasses table in electromagnetism
On the central axis of face unit；At the upper surface center of the super surface cell of electromagnetism cartesian coordinate system, xOy are established for coordinate origin
Face is parallel with the horizontal plane of the super surface cell of electromagnetism and y is parallel with a certain length of side of the super surface cell of electromagnetism, the production of vortex electromagnetic wave
Generating apparatus uses tranmitting frequency for the antenna of 10GHz；Distance is between center of antenna and coordinate origin
2. vortex electromagnetic wave mode converting means as described in claim 1, which is characterized in that the metallic plate uses cuboid
Structure, thickness 0.3mm, upper surface size are 320 × 320mm；The distance between metallic plate is 6.64mm.
3. vortex electromagnetic wave mode converting means as described in claim 1, which is characterized in that the super surface of metallic plate electromagnetism
Unit includes stacking gradually and non-touching first metallic plate, the second metallic plate, third metallic plate, the 4th metallic plate, is passed through
Resin scaffold is fixed.
4. vortex electromagnetic wave mode converting means as claimed in claim 3, which is characterized in that first metallic plate, second
Metallic plate, third metallic plate, on the 4th metallic plate etching cycle arrangement M × N number of cross groove, each each row cross row of row
The center of groove is on an axis parallel with the metallic plate upper surface length of side；Second metallic plate, third metallic plate and the 4th metal
The arrangement mode of cross groove, number all same in plate and the first metallic plate.
5. vortex electromagnetic wave mode converting means as claimed in claim 4, which is characterized in that first metallic plate, second
Metallic plate, third metallic plate and the 4th metallic plate form M × super surface cell of N number of electromagnetism of periodic arrangement, each unit
The length of side is 0.533 λ=16mm, wherein the central point of four cross grooves is respectively positioned on the central shaft of the super surface cell of electromagnetism.
6. vortex electromagnetic wave mode converting means as claimed in claim 5, which is characterized in that each super surface cell center of electromagnetism
Relative position is consistent with cross groove center relative position on the first metallic plate, is expressed as：
Wherein, m is expert at by the super surface cell of electromagnetism, n be the super surface cell column of electromagnetism, m=1,2 ..., 20, n=1,
2 ..., 20, D be the spacing at two adjacent super surface cell centers of electromagnetism,For the super surface cell center of m rows the n-th row electromagnetism
Relative position.
7. vortex electromagnetic wave mode converting means as claimed in claim 4, which is characterized in that first metallic plate, second
The size of the cross groove etched on metallic plate, third metallic plate and the 4th metallic plate surpasses the compensation phase of surface cell in electromagnetism
Position ψmnMeet：
Wherein, m is expert at by the super surface cell of electromagnetism, n be the super surface cell column of electromagnetism, m=1,2 ..., M, n=1,
2 ..., N, l=1,2 ..., l represent vortex electromagnetic wave and pass through the increased mode number of modal transformation lens, and K is phase correction, works as m>
M/2, n>When N/2, K=0；Work as m>M/2, n<When N/2, K=270；Work as m<M/2, n>When N/2, K=90；Work as m<M/2, n<N/2
When, K=180.Required compensation phase ψmnBetween 0~2 π, according to the compensation phase of the super surface cell of m rows the n-th row electromagnetism
Value ψmnDraw the phase distribution figure of the super surface cell of all electromagnetism.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112909566A (en) * | 2021-01-20 | 2021-06-04 | 成都第三象限未来科技有限公司 | Multifunctional vortex stack state generator |
| CN113281743A (en) * | 2021-05-14 | 2021-08-20 | 合肥工业大学 | Rapid high-resolution imaging method based on OAM radar imaging system |
| CN115117625A (en) * | 2022-07-05 | 2022-09-27 | 电子科技大学 | Method for generating phase-controllable OAM electromagnetic wave under random initial phase condition of phase-locked source |
| CN115360523A (en) * | 2022-07-22 | 2022-11-18 | 电子科技大学 | Low RCS (Radar Cross section) super-surface structure design method based on singularity cancellation |
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| CN105680162A (en) * | 2016-01-19 | 2016-06-15 | 西安电子科技大学 | Method for generating multiple orbital angular momentum beams |
| CN106887657A (en) * | 2017-03-10 | 2017-06-23 | 中国矿业大学 | A kind of mechanically tunable narrow band filter based on Meta Materials |
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| CN105552556A (en) * | 2015-12-28 | 2016-05-04 | 西安电子科技大学 | Orbital angular momentum vortex wave beam generation apparatus and method |
| CN105680162A (en) * | 2016-01-19 | 2016-06-15 | 西安电子科技大学 | Method for generating multiple orbital angular momentum beams |
| CN106887657A (en) * | 2017-03-10 | 2017-06-23 | 中国矿业大学 | A kind of mechanically tunable narrow band filter based on Meta Materials |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112909566A (en) * | 2021-01-20 | 2021-06-04 | 成都第三象限未来科技有限公司 | Multifunctional vortex stack state generator |
| CN113281743A (en) * | 2021-05-14 | 2021-08-20 | 合肥工业大学 | Rapid high-resolution imaging method based on OAM radar imaging system |
| CN115117625A (en) * | 2022-07-05 | 2022-09-27 | 电子科技大学 | Method for generating phase-controllable OAM electromagnetic wave under random initial phase condition of phase-locked source |
| CN115360523A (en) * | 2022-07-22 | 2022-11-18 | 电子科技大学 | Low RCS (Radar Cross section) super-surface structure design method based on singularity cancellation |
| CN115360523B (en) * | 2022-07-22 | 2024-06-11 | 电子科技大学 | Low RCS super-surface structure design method based on singular point cancellation |
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