CN108879077A - A kind of vortex electromagnetic wave generator - Google Patents
A kind of vortex electromagnetic wave generator Download PDFInfo
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- CN108879077A CN108879077A CN201810594288.8A CN201810594288A CN108879077A CN 108879077 A CN108879077 A CN 108879077A CN 201810594288 A CN201810594288 A CN 201810594288A CN 108879077 A CN108879077 A CN 108879077A
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- metal plate
- ferrite
- soft magnetic
- electromagnetic wave
- permanent
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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
- H01Q1/364—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith using a particular conducting material, e.g. superconductor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- Variable-Direction Aerials And Aerial Arrays (AREA)
- Aerials With Secondary Devices (AREA)
Abstract
The invention discloses a kind of vortex electromagnetic wave generators, including the first metal plate, soft magnetic ferrite, the second metal plate, permanent-magnet ferrite and probe, wherein, the soft magnetic ferrite is cylindrical structure, soft magnetic ferrite upper surface is fixed with first metal plate, and the radius of first metal plate is less than the radius of the soft magnetic ferrite；Soft magnetic ferrite lower surface is fixed with second metal plate, and the radius of soft magnetic ferrite is less than the second metal plate；A through-hole is provided on second metal plate, the probe can be passed through from the through-hole；The permanent-magnet ferrite is located at below second metal plate, and the cross-sectional area of permanent-magnet ferrite is greater than the cross-sectional area of soft magnetic ferrite；Second metal plate is connected with a threaded rod, and the permanent-magnet ferrite is equipped with a through-hole, and the screw thread matched with the threaded rod is machined in through-hole.Vortex electromagnetic wave generator of the invention can produce the vortex electromagnetic wave of different frequency range difference angular momentum pattern count, and structure is simple, handling ease, it is easy to accomplish.
Description
Technical field
The invention belongs to wireless communication system field of electronic devices, and in particular to a kind of vortex electromagnetic wave generator.
Background technique
Vortex electromagnetic wave is a kind of electromagnetic beam with helical phase face and azimuthal component, has orbital angular momentum.
The vortex electromagnetic wave of optical frequencies can be applied to " optical tweezer " and " optical wrench " and realize micromanipulation, also can be applied to super-resolution
The various aspects such as rate imaging and quantum information technology.The vortex electromagnetic wave of microwave frequency band can be applied to wireless communication field, utilize
Vortex electromagnetic wave with different orbital angular momentums can realize multiple channels under identical frequency, be obviously improved wireless communication letter
Road capacity, to solve the problems, such as that Current wireless communication frequency spectrum resource is nervous.
And how to generate the vortex electromagnetic wave with different orbital angular momentums is technical problem urgently to be resolved at present.When
Before, people have had investigated a variety of methods for generating vortex electromagnetic wave.Mainly there are following methods：(1) step-like spiral is utilized
It is simple for structure before plane wave front is converted to helicon by the phase-modulation effect of phase-plate, but processing request is high, and main
Applied to high band more than optical frequencies or millimeter wave；(2) real by the way of helical phase feed in array structure antenna
Now be vortexed wave, can be used for the lower microwave frequency band of frequency, but antenna structure and feed structure are all complicated, the phase of feed section
Position and amplitude control difficulty are big, and when especially orbital angular momentum pattern count is larger, structure can tend to bulky complex, realize difficulty pole
Greatly；(3) vortex electromagnetic wave is realized using the round traveling waveguide of orthogonal feed, structure is simply easy to process, but its orthogonal feedback
Electric structure is complex, once and structure fix, swirl pattern and working frequency are fixed immediately, can not be tuned；(4) base
Vortex electromagnetic wave is generated in the mode of artificial surface phasmon, can obtain that there are different orbital angular momentums at different frequencies
The vortex wave of pattern count, but its structure needs Fine design and processing, and cannot achieve multimode regulation and frequency band tuning.So
It is necessary to design the vortex electromagnetic wave generation that a kind of structure is simple, working frequency is adjustable and can produce different angular momentum pattern counts
Device.
Summary of the invention
That the purpose of the present invention is to provide a kind of structures is simple, working frequency is adjustable and can produce different angular momentum pattern counts
Vortex electromagnetic wave generator.
To achieve the goals above, the present invention provides a kind of vortex electromagnetic wave generators, including the first metal plate, soft magnetism
Ferrite, the second metal plate, permanent-magnet ferrite and probe, wherein soft magnetic ferrite is cylindrical structure, on soft magnetic ferrite
Surface is fixed with the first metal plate, and the radius of the first metal plate is less than the radius of soft magnetic ferrite；Soft magnetic ferrite following table
Face is fixed with the second metal plate, and the radius of soft magnetic ferrite is less than the second metal plate；A through-hole is provided on second metal plate,
Probe can be passed through from the through-hole；The permanent-magnet ferrite is located at below the second metal plate, and the cross-sectional area of permanent-magnet ferrite
Greater than the cross-sectional area of soft magnetic ferrite；Second metal plate is connected with a threaded rod, and it is logical that the permanent-magnet ferrite is equipped with one
Hole, and the screw thread matched with the threaded rod is machined in through-hole.
As a further limited solution of the present invention, the material of permanent-magnet ferrite is strontium ferrite or barium ferrite or neodymium iron
Boron permanent magnet.
As a further limited solution of the present invention, the material of soft magnetic ferrite is yttrium iron garnet ferrite or magnesium manganese iron
Oxysome or nickel-zinc ferrite.
As a further limited solution of the present invention, permanent-magnet ferrite is cylindrical structure.
As a further limited solution of the present invention, the first metal plate, the second metal plate and threaded rod are all made of aluminium alloy
It is made.
As a further limited solution of the present invention, between soft magnetic ferrite and the first metal plate, soft magnetic ferrite and
It can be fixed by welding manner or conducting resinl between two metal plates.
As a further limited solution of the present invention, the first metal plate, soft magnetic ferrite, the second metal plate and permanent magnet oxygen
Body is arranged in concentric fashion.
After adopting the above structure, permanent-magnet ferrite can provide bias magnetic field for soft magnetic ferrite, thus in soft magnet oxygen
Body surface face generates magnetic surface phasmon, and probe is passed through the through-hole on the second metal plate and is fed, excitation magnetic surface etc. from
Excimer forms circumferential traveling wave mode, this circumferential direction so that magnetic surface phasmon carries out circumferential propagation on soft magnetic ferrite surface
Traveling wave can be to space radiation energy, and space phase is at Spiral distribution, to generate vortex electromagnetic wave.And by changing permanent magnetism
The biased magnetic field strength that ferrite provides is the frequency and angular momentum pattern count of adjustable vortex electromagnetic wave.Bias magnetic field is being provided
Permanent-magnet ferrite on process and set threaded through-hole, and the second metal plate is connected with threaded rod, the threaded rod and permanent magnetism
The screw thread of ferrite through-hole matches, the turn permanent-magnet ferrite on threaded rod, change permanent-magnet ferrite and the second metal plate it
Between distance, i.e., the biased magnetic field strength that changeable permanent-magnet ferrite provides, between permanent-magnet ferrite and the second metal plate
The increase of distance, the remitted its fury of bias magnetic field, and then change the energy that circumferential traveling wave gives off to space, it is final to can get not
The vortex electromagnetic wave of same frequency and angular momentum pattern count.
Other than changing biased magnetic field strength, can also it pass through in addition to changing the distance between permanent-magnet ferrite and the second metal plate
Change the material of permanent-magnet ferrite to adjust the intensity of bias magnetic field.The material that permanent-magnet ferrite can use have strontium ferrite or
Barium ferrite or Nd-Fe-B permanent magnet.
First metal plate, soft magnetic ferrite, the second metal plate and permanent-magnet ferrite are arranged in concentric fashion, and strong guarantee is whole
A soft magnetic ferrite is all placed in the magnetic field of permanent-magnet ferrite offer.
Compared with existing vortex electromagnetic wave generator, vortex electromagnetic wave generator structure provided by the invention is simple, adds
Work is easy, is easily achieved, and working frequency is adjustable and can produce different angular momentum pattern counts.
Detailed description of the invention
Fig. 1 is three-dimensional structure schematic diagram of the invention.
Fig. 2 is structural parameters schematic diagram of the invention.
Fig. 3 be angular momentum be 2 and 3 when vortex electromagnetic wave vortex phase simulation result diagram.
Fig. 4 be angular momentum be 2 and 3 when antenna pattern simulation result diagram.
Fig. 5 be bias magnetic field Angular Momentum be 2 when vortex wave frequency rate regulate and control situation simulation result diagram.
In figure：1, the first metal plate, 2, soft magnetic ferrite, the 3, second metal plate, 4, permanent-magnet ferrite, 5, threaded rod, 6,
Probe.
Specific embodiment
For a better understanding of the present invention, below with reference to the embodiment content that the present invention is furture elucidated, but it is of the invention
Content is not limited solely to the following examples.
As shown in Figure 1, the embodiment of the invention discloses a kind of vortex electromagnetic wave generator, including the first metal plate 1, soft magnetism
Ferrite 2, the second metal plate 3, permanent-magnet ferrite 4 and probe 6, wherein soft magnetic ferrite 2 is cylindrical structure, soft magnet
2 upper surface of oxysome is fixed with the first metal plate 1, and the radius of the first metal plate 1 is less than the radius of the soft magnetic ferrite 2；
2 lower surface of soft magnetic ferrite is fixed with the second metal plate 3, and the radius of soft magnetic ferrite 2 is less than the second metal plate 3；Second
A through-hole is provided on metal plate 3, probe 6 can be passed through from the through-hole；Permanent-magnet ferrite 4 is located at 3 lower section of the second metal plate, and forever
The cross-sectional area of magnetic ferrites 4 is greater than the cross-sectional area of soft magnetic ferrite 2, and the cross-sectional area of permanent-magnet ferrite is greater than soft magnet oxygen
The cross-sectional area of body can guarantee that soft magnetic ferrite can be completely disposed in the bias magnetic field of permanent-magnet ferrite offer；Second metal
Plate 3 is connected with a threaded rod 5, and permanent-magnet ferrite 4 is equipped with a through-hole, and the spiral shell matched with threaded rod is machined in through-hole
Line.
It is the structural parameters schematic diagram of the embodiment of the present invention shown in Fig. 2, in the present embodiment, soft magnetic ferrite is yttrium iron
Ferrogarnet, saturation magnetization 4πms=1800Gauss, permittivity ε=15, soft magnetic ferrite are cylindrical body knot
Structure, radius Rf=9mm, height Hf=5mm.First metal plate and the second metal plate are aluminium alloy plate, thickness Ha1=Ha2=
1mm, radius are respectively Ra1=8.5mm, Ra2=14mm；The radius of first metal plate should be less than the radius of soft magnetic ferrite, with
Circumferential traveling wave being capable of outside radiation energy after guaranteeing the generation magnetic surface phasmon on soft magnetic ferrite and exciting.Screw thread
Bar is made of aluminium alloy, length Hd=20mm, outer diameter Md=3mm；Permanent-magnet ferrite is Nd-Fe-B permanent magnet, and permanent-magnet ferrite is
Cylindrical structure, radius Rm=9.5mm, height Hm=5mm.Permanent-magnet ferrite distance Ht=between the second metal sheet metal
10mm；First metal plate, soft magnetic ferrite, the second metal plate and permanent-magnet ferrite are concentrically arranged.Probe radius Rp=0.5mm,
Probe height Hp=6mm；Through-hole radius Rh=1.5mm on second metal plate, distance the second metal plate center Lp=11mm lead to
Closer to the second metal plate center, the launching efficiency of probe is higher in hole.
Probe is fed by the through-hole on the second metal plate of insertion, generates vortex electromagnetic wave.Fig. 3 is vortex electromagnetism
The analogous diagram of wave phase, wherein Fig. 3 (a) shows that electromagnetic wave space phase is helically when generator centre frequency is 5GHz
Distribution, as vortex electromagnetic wave.It can be seen that phase experienced 2 periods for becoming from 0 ° 360 ° circumferentially distributed in figure, this
Hour angle Momentum Model number is 2；Because of the presence of resonance phenomena, different frequency and angle can be also generated under conditions of same parameter
Momentum Model number, Fig. 3 (b) show under the Parameter Conditions, and when generator centre frequency is 6GHz, electromagnetic wave space phase is in spiral shell
Rotation distribution, for vortex electromagnetic wave.Phase experienced 3 periods for becoming from 0 ° 360 °, angular momentum mode circumferentially distributed at this time
Number is 3.
Fig. 4 is the antenna pattern of vortex electromagnetic wave generator under the Parameter Conditions, when generator centre frequency is 5GHz
Shown in generated antenna pattern such as Fig. 4 (a), Fig. 4 (a) shows in centre frequency 5GHz, vortex electromagnetic wave angular momentum mould
Formula number is 2, and gain 3.8dBi, shows good radiation characteristic by 94 ° of main lobe width.Fig. 4 (b) shows that frequency is
Generated vortex electromagnetic wave angular momentum pattern count is 3, gain 3.3dBi when 6GHz, 103 ° of main lobe width, is shown good
Radiation characteristic.
The turn permanent-magnet ferrite on threaded rod changes the distance between permanent-magnet ferrite and the second metal plate, changes accordingly
Become the intensity of bias magnetic field, the final adjusting realized to frequency and angular momentum pattern count.Fig. 5 give change permanent-magnet ferrite and
The vortex electromagnetic wave wave frequency rate that Angular Momentum pattern count is 2 after distance between second metal plate regulates and controls situation analogous diagram.It can in figure
To find out, when vortex electromagnetic wave angular momentum pattern count is 2, by permanent-magnet ferrite between the second metal plate distance Ht from 10mm
When being reduced to 6mm and being reduced to 4mm again, the bias magnetic field enhancing that permanent-magnet ferrite provides increases to 800Oe from 600Oe and is further added by
When to 1000Oe, centre frequency increases to 5GHz from 4.5GHz and is further added by 5.5GHz, the tri- figure (edge a1, b2, c3 in corresponding diagram 5
White arrow direction change) angular momentum pattern count be 2, and other frequencies corresponding to other several figures cannot all generate in Fig. 5
Vortex electromagnetic wave confirms magnetic field to the modulating properties of vortex wave frequency and angular momentum pattern count with this.
When vortex electromagnetic wave angular momentum pattern count is 3, by permanent-magnet ferrite between the second metal plate distance Ht from 10mm
When being reduced to 6mm and being reduced to 4mm again, the bias magnetic field enhancing that permanent-magnet ferrite provides increases to 800Oe from 600Oe and is further added by
To 1000Oe, centre frequency increases to 6GHz from 5.7GHz and is further added by 6.4GHz at this time, and other frequencies cannot all generate whirlpool
Electromagnetic wave is revolved, magnetic field is confirmed to the modulating properties of vortex wave frequency and angular momentum pattern count with this.
The above is only a preferred embodiment of the present invention.It should be pointed out that for the ordinary skill people of the art
For member, under the premise of not departing from the present invention, several improvements and modifications can also be made, these improvements and modifications also should be regarded as
Protection scope of the present invention.
Claims (8)
1. a kind of vortex electromagnetic wave generator, it is characterised in that：Including the first metal plate, soft magnetic ferrite, the second metal plate, forever
Magnetic ferrites and probe, wherein the soft magnetic ferrite is cylindrical structure, and soft magnetic ferrite upper surface is fixed with described
First metal plate, and the radius of first metal plate is less than the radius of the soft magnetic ferrite；Soft magnetic ferrite lower surface is solid
Surely it is equipped with second metal plate, and the radius of soft magnetic ferrite is less than the second metal plate；One is provided on second metal plate
Through-hole, the probe can be passed through from the through-hole；The permanent-magnet ferrite is located at below second metal plate, and permanent magnet oxygen
The cross-sectional area of body is greater than the cross-sectional area of soft magnetic ferrite；Second metal plate is connected with a threaded rod, the permanent magnet
Oxysome is equipped with a through-hole, and the screw thread matched with the threaded rod is machined in through-hole.
2. a kind of vortex electromagnetic wave generator as described in claim 1, it is characterised in that：Constitute the material of the permanent-magnet ferrite
Material is strontium ferrite or barium ferrite or Nd-Fe-B permanent magnet.
3. a kind of vortex electromagnetic wave generator as claimed in claim 1 or 2, it is characterised in that：The permanent-magnet ferrite is circle
Column structure.
4. a kind of vortex electromagnetic wave generator as described in claim 1, it is characterised in that：Constitute the material of the soft magnetic ferrite
Material is yttrium iron garnet ferrite or magnesium Mn ferrite or nickel-zinc ferrite.
5. a kind of vortex electromagnetic wave generator as described in claim 1, it is characterised in that：First metal plate, soft magnet
Oxysome, the second metal plate and permanent-magnet ferrite are distributed in concentric fashion.
6. a kind of vortex electromagnetic wave generator as described in claim 1, it is characterised in that：Second metal plate and threaded rod
Connection type be welding.
7. a kind of vortex electromagnetic wave generator as described in claim 1, it is characterised in that：The soft magnetic ferrite and described the
It can be fixed by welding manner or conducting resinl between one metal plate, between the soft magnetic ferrite and second metal plate.
8. vortex electromagnetic wave generator according to claim 1, it is characterised in that：First metal plate, described second
Metal plate and the threaded rod are made of aluminium alloy.
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| CN201810594288.8A CN108879077B (en) | 2018-06-11 | 2018-06-11 | Vortex electromagnetic wave generator |
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| CN201810594288.8A CN108879077B (en) | 2018-06-11 | 2018-06-11 | Vortex electromagnetic wave generator |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020068847A1 (en) * | 2000-09-01 | 2002-06-06 | George Riach | Vortex magnetic regenerating device |
| JP2005290943A (en) * | 2004-03-31 | 2005-10-20 | Kenji Shinohara | Magnetic substance and induced eddy current generator utilizing wave energy |
| JP2006262260A (en) * | 2005-03-18 | 2006-09-28 | Yamaguchi Univ | Distributed constant type non-reciprocal element, and garnet single crystal for the same |
| US20140088337A1 (en) * | 2012-09-27 | 2014-03-27 | Sean Hedgecock | Spiral Magnetic Vortex Instrument |
| US20140346353A1 (en) * | 2011-12-20 | 2014-11-27 | Universiteit Antwerpen | Charged particle vortex wave generation |
| CN104616904A (en) * | 2014-09-10 | 2015-05-13 | 刘华映 | Disk gyro spiral wing quantum chromodynamics power generation engine automobile with magnetic chord radio-frequency quantum chromodynamics super power amplifying capacitor and super power amplifying transformer |
| CN107240783A (en) * | 2017-06-07 | 2017-10-10 | 华中科技大学 | A kind of vortex electromagnetic antenna of double mode multiplexing |
| CN107611600A (en) * | 2017-08-08 | 2018-01-19 | 西安电子科技大学 | A kind of SIW annular slot antennas for producing bimodulus OAM vortex electromagnetic waves |
| CN107887245A (en) * | 2017-09-28 | 2018-04-06 | 浙江大学 | A kind of controllable vortex electron beam generation method, device |
| CN208256897U (en) * | 2018-06-11 | 2018-12-18 | 南京工业职业技术学院 | A kind of vortex electromagnetic wave generator |
-
2018
- 2018-06-11 CN CN201810594288.8A patent/CN108879077B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020068847A1 (en) * | 2000-09-01 | 2002-06-06 | George Riach | Vortex magnetic regenerating device |
| JP2005290943A (en) * | 2004-03-31 | 2005-10-20 | Kenji Shinohara | Magnetic substance and induced eddy current generator utilizing wave energy |
| JP2006262260A (en) * | 2005-03-18 | 2006-09-28 | Yamaguchi Univ | Distributed constant type non-reciprocal element, and garnet single crystal for the same |
| US20140346353A1 (en) * | 2011-12-20 | 2014-11-27 | Universiteit Antwerpen | Charged particle vortex wave generation |
| CN104303256A (en) * | 2011-12-20 | 2015-01-21 | 安特卫普大学 | Charged particle vortex wave generation |
| US20140088337A1 (en) * | 2012-09-27 | 2014-03-27 | Sean Hedgecock | Spiral Magnetic Vortex Instrument |
| CN104616904A (en) * | 2014-09-10 | 2015-05-13 | 刘华映 | Disk gyro spiral wing quantum chromodynamics power generation engine automobile with magnetic chord radio-frequency quantum chromodynamics super power amplifying capacitor and super power amplifying transformer |
| CN107240783A (en) * | 2017-06-07 | 2017-10-10 | 华中科技大学 | A kind of vortex electromagnetic antenna of double mode multiplexing |
| CN107611600A (en) * | 2017-08-08 | 2018-01-19 | 西安电子科技大学 | A kind of SIW annular slot antennas for producing bimodulus OAM vortex electromagnetic waves |
| CN107887245A (en) * | 2017-09-28 | 2018-04-06 | 浙江大学 | A kind of controllable vortex electron beam generation method, device |
| CN208256897U (en) * | 2018-06-11 | 2018-12-18 | 南京工业职业技术学院 | A kind of vortex electromagnetic wave generator |
Non-Patent Citations (3)
| Title |
|---|
| M. SIGALOV 等: "Dual band circular polarized patch antenna using small ferrite disks", 《2008 IEEE 25TH CONVENTION OF ELECTRICAL AND ELECTRONICS ENGINEERS IN ISRAEL》 * |
| 张香博: "涡旋电磁波在无线通信中的应用研究", 《中国优秀硕士学位论文全文数据库 信息科技辑》 * |
| 李镇: "磁性光子晶体非互易传输特性研究", 《中国博士学位论文全文数据库 基础科学辑》 * |
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