CN209088083U - A kind of list is around spiral OAM antenna and spiral OAM antenna - Google Patents
A kind of list is around spiral OAM antenna and spiral OAM antenna Download PDFInfo
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- CN209088083U CN209088083U CN201821780461.5U CN201821780461U CN209088083U CN 209088083 U CN209088083 U CN 209088083U CN 201821780461 U CN201821780461 U CN 201821780461U CN 209088083 U CN209088083 U CN 209088083U
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- coaxial feeder
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- oam
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Abstract
The utility model relates to field of antenna more particularly to a kind of list around spiral OAM antenna and spiral OAM antenna.Antenna includes a metal spiral and bowl-type metallic reflection plate；Both coaxial feeder inner conductor one and coaxial feeder outer conductor one constitute whole coaxial feeder；It welds the bottom of coaxial feeder outer conductor one and bowl-type metallic reflection plate；Coaxial feeder inner conductor one and metal spiral weld, and bowl-type metallic reflection plate bottom is provided with hole, penetrates for coaxial feeder one.The utility model has the advantages that the utility model proposes spiral OAM antenna, simple and compact for structure, size is smaller, while realizing higher gain, puts forth effort the contradiction for solving between OAM antenna miniaturization and gain；In addition, the antenna can also be multiplexed a variety of OAM mode by integrating the single around spiral of multiple and different sizes.To sum up, the utility model has very strong practical significance.
Description
Technical field
The utility model relates to field of antenna more particularly to a kind of list around spiral OAM antenna and spiral OAM antenna.
Background technique
Currently, the whole world enters information Internet age, and the business demand of wireless communication is growing, and radio spectrum resources are in short supply
The problem of also become increasingly conspicuous, it is various promoted spectrum utilization efficiencies radio technologies come into being.It is extensive with these technologies
Larger growth has been obtained using with gradually maturation, the utilization rate of radio spectrum resources；But meanwhile the prior art (such as time-division, space division
Multiplexing technology, MIMO technology, order phase modulation etc.) it is all based on these electromagnetic waves such as frequency, phase, time, space, amplitude
Tradition multiplexing dimension promote spectrum utilization efficiency；As these dimensions are fully developed increasingly, based on these dimensions
Modulation and coding techniques are difficult to that existing spectrum efficiency is allowed to have greatly improved again.However, the orbital angular momentum risen recently
Conventional planar wave is but twisted into vortex electromagnetic wave by (Orbital Angular Momentum, OAM) communication technology, with different moulds
Orthogonality between state vortex electromagnetic wave provides completely new multiplexing dimension, significant increase spectrum efficiency.The considerable prospect of OAM, makes OAM
The research and development of antenna become current hotspot.
Currently, OAM antenna can be divided into the super surface of Homogeneous Circular array, spiral phase plate, electromagnetism and annular traveling wave antenna four
Class.Due to the vortex essence of OAM, there are center phase singular points for wave beam, thus always in the shape of hollow diverging, lead to it
Radiation energy is not concentrated.Therefore, in addition to array antenna and antenna with large-scale reflecting surface, the gain of existing OAM antenna is mostly
It is very unsatisfactory.And on the other hand, according to array or large-scale reflection board structure, the size of antenna is just difficult to miniaturization.So
And existing list is considered as the compact uniform straight line array of the one kind being made of annular traveling wave antenna around axial mode helical antenna；
Therefore, if changing the dimensional parameters of axial mode helical antenna, the travelling wave current ring array element for keeping its equivalent meets annular traveling wave generation
The condition of OAM can realize a kind of array OAM antenna with higher gain in limited physics bore and section, thus
It solves the above problems.
On the other hand, relative to the operation wavelength in vacuum, the spiral interval S of axial mode helical antenna is smaller, and spiral is led
Body total length is larger, therefore axial mode helical antenna can be approximately to be made of the travelling wave current ring that N number of diameter is D with interval S
Uniform straight line array, wherein N is spiral the number of turns, and D is single turn screw diameter.Therefore, single turn spiral circumference π D is made to meet π D if adjusting D
=l λ can make helical antenna generate the OAM wave beam of modulus l.
Utility model content
The purpose of utility model: it is preferably single around spiral OAM antenna and spiral OAM antenna in order to provide a kind of effect,
Specific purposes are shown in multiple substantial technological effects of specific implementation part.
In order to reach purpose as above, the utility model adopts the following technical scheme:
A kind of list is around spiral OAM antenna, which is characterized in that antenna includes a metal spiral and bowl-type metallic reflection plate；
Both coaxial feeder inner conductor one and coaxial feeder outer conductor one constitute whole coaxial feeder；Coaxial feeder outer conductor one and bowl
It welds the bottom of shape metallic reflection plate；Coaxial feeder inner conductor one and metal spiral weld, and bowl-type metallic reflection plate bottom is provided with
Hole is penetrated for coaxial feeder one.
The further technical solution of the utility model is that driving source can be to the metal spiral through the coaxial feeder one
Feed, can evoke corresponding current distribution on the metal spiral surface.
The further technical solution of the utility model is that the metal spiral overall length is longer compared to electromagnetic wavelength, gold
Belong to helical surface electric current approximation to be distributed in unreflected traveling wave；Metal spiral overall length, that is, single turn ring perimeter is multiplied by contained by metal spiral
Total number of turns.
A kind of spiral OAM antenna, which is characterized in that antenna includes two metal spirals and a bowl-type metallic reflection plate；
Both coaxial feeder inner conductor one and coaxial feeder outer conductor one constitute whole coaxial feeder one, two He of coaxial feeder inner conductor
Both coaxial feeder outer conductors two constitute whole coaxial feeder two；Coaxial feeder outer conductor one and coaxial feeder outer conductor two
It is welded with the bottom of bowl-type metallic reflection plate；Coaxial feeder inner conductor one and coaxial feeder inner conductor two and metal spiral 1 weld
It connects, bowl-type metallic reflection plate bottom is driveed there are two hole, is penetrated for coaxial feeder.
It using the utility model of technical solution as above, has the advantages that compared with the existing technology: the utility model
The spiral OAM antenna of proposition, simple and compact for structure, size is smaller, while realizing higher gain, puts forth effort solve OAM days
Contradiction between line miniaturization and gain；In addition, the antenna can also be multiplexed a variety of by integrating the single around spiral of multiple and different sizes
OAM mode.To sum up, the utility model has very strong practical significance.
Detailed description of the invention
In order to further illustrate the utility model, it is further illustrated with reference to the accompanying drawing:
Fig. 5 is the schematic diagram that the utility model embodiment generates OAM；
Fig. 1-1 and Fig. 1-2 is the structural schematic diagram of the utility model embodiment；
Fig. 2-1 and Fig. 2-2 is the dimensional parameters figure of the utility model embodiment；Wherein, subscript i takes 1 or 2, respectively
Indicate the size of the correspondence parameter of spiral 1 and spiral 2；
Fig. 3-1 and 3-2 is the vortex phase figure that antenna is generated in 4.8GHz (3-1 is that=2,3-2 is=3)；
Fig. 4-1 and Fig. 4-2 is the three-dimensional radiation directional diagram that antenna is generated in 4.8GHz (4-1 is that=2,4-2 is=3)；
Wherein: 1 metal spiral one, 2 metal spirals two, 3 bowl-type metallic reflection plates, 4 coaxial feeder outer conductors one, 5 are coaxial
Feeder line outer conductor two, 6 coaxial feeder inner conductors one, 7 coaxial feeder inner conductors two, 8 holes.
Specific embodiment
With reference to the accompanying drawings and detailed description, the utility model is furtherd elucidate, it should be understood that following specific embodiment parties
Formula is merely to illustrate the utility model rather than limitation the scope of the utility model.It needs in the description of the present invention,
Illustrate, term " center ", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outside", "top", "bottom" etc. refer to
The orientation or positional relationship shown be based on the orientation or positional relationship shown in the drawings, be merely for convenience of description the utility model and
Simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation construction
And operation, therefore should not be understood as limiting the present invention.Furthermore unless specifically defined or limited otherwise, term " peace
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
The concrete meaning of language in the present invention.
This patent provides a variety of concomitant regimens, in place of different expression, belong to modified scheme based on basic scheme or
It is parallel type scheme.Every kind of scheme has the unique features of oneself.
Embodiment one:
A kind of list is around spiral OAM antenna, which is characterized in that antenna includes a metal spiral 1 and bowl-type metallic reflection plate
3；Both coaxial feeder inner conductor 1 and coaxial feeder outer conductor 1 constitute whole coaxial feeder；Coaxial feeder outer conductor one
4 weld with the bottom of bowl-type metallic reflection plate 3；Coaxial feeder inner conductor 1 and metal spiral 1 weld, bowl-type metallic reflection plate 3
Bottom is provided with hole 8, penetrates for coaxial feeder one.
Driving source can be fed through the coaxial feeder one to the metal spiral 1, can be on 1 surface of metal spiral
Evoke corresponding current distribution.Driving source is fed through the coaxial feeder to the spiral, will be evoked accordingly in the helical surface
Current distribution.As the spiral overall length (referring to single turn ring perimeter multiplied by total number of turns contained by spiral) compared to electromagnetic wavelength compared with
Long, helical surface electric current approximation is distributed in unreflected traveling wave.Therefore, the spiral, which can be regarded as, is loaded with annular traveling wave electricity by multiple
The loop antenna of stream along the spiral 1 it is axial it is linearly evenly distributed be formed by aerial array, array number is equal to the spiral 1
The number of turns.The theoretical analysis is loaded with the loop antenna of annular traveling wave electric current, if ring perimeter is l times of integer of current traveling wave wavelength, just
The OAM that pattern count is l can be generated.Therefore, the single turn perimeter of spiral described in appropriate adjustment can generate specific mould in required frequency point
The OAM of formula number.
The further technical solution of the utility model is that 1 overall length of metal spiral is longer compared to electromagnetic wavelength, gold
Belong to 1 surface current approximation of spiral to be distributed in unreflected traveling wave；1 overall length of metal spiral, that is, single turn ring perimeter is multiplied by metal spiral 1
Contained total number of turns.
Embodiment two:
A kind of spiral OAM antenna, which is characterized in that antenna includes two metal spirals 1 and a bowl-type metallic reflection plate
3；Both coaxial feeder inner conductor 1 and coaxial feeder outer conductor 1 constitute whole coaxial feeder one, coaxial feeder inner conductor
Both 27 and coaxial feeder outer conductor 25 constitute whole coaxial feeder two；Coaxial feeder outer conductor 1 and coaxial feeder
It welds the bottom of outer conductor 25 and bowl-type metallic reflection plate 3；Coaxial feeder inner conductor 1 and coaxial feeder inner conductor 27 with
Metal spiral 1 welds, and 3 bottom of bowl-type metallic reflection plate is driveed there are two hole 8, penetrates for coaxial feeder.
Embodiment one and embodiment two generate the OAM wave beam that pattern count is 3 and 2 respectively.
According to aforementioned principles, the spiral 1, spiral 2 single turn ring perimeter should be respectively the 3 of ring upgoing wave electric current phase wavelength
Times and 2 times.Optimized design is to generate the OAM wave beam of pattern count l=2 and 3 in 4.8GHz, most in this specific embodiment
Determine that each parameter size in Fig. 2-1, Fig. 2-2 is as follows: (unit: mm) eventually
| L1 | L2 | H | d | S | D1 | D2 |
| 90 | 110 | 17 | 3 | 5 | 61.5 | 42.2 |
Simulation analysis has been carried out with commercialization finite element emulation software ANSYS HFSS to the embodiment.As shown in the picture, exist
4.8GHz, when feeding respectively to coaxial feeder 5 and coaxial feeder 4, which produces the OAM vortex phase of l=2 and l=3 respectively
Position coincide with theory analysis, has reached design object.As shown in figure 4, the antenna radiation pattern is in typical under both modalities which
OAM hollow morphology, but hollow space is relatively narrow, and radiation energy is more concentrated.Meanwhile maximum gain reaches 8.4dB (l=2) and 8.7dB
(l=3), higher than most of existing OAM antennas under identical size.
In conjunction with Fig. 5:
It as shown is the loop aerial schematic diagram for being loaded with travelling wave current.In figure, θ is pitch angle,For azimuth；R is
The position vector of certain point P in far field, r ' are the position vector of certain point on loop aerial；R is the radius of annular traveling wave antenna.Work as ring
At l times of integer of Zhou Changwei traveling wave wavelength, current distribution is represented by ring
Wherein,It is each point electric current phasor on loop aerial with azimuthThe function of variation, I0For travelling wave current
Amplitude.In free space thus magnetic vector potential A (r) can be calculated as
Ring integral representation therein is integrated along loop aerial.Again by
It is available from and is by each component equation of electromagnetic field in space
Wherein, C is constant, C=-j-lRI0/2；Jl-1And Jl+1It is J respectivelyl-1(kRsin θ) and Jl+1The contracting of (kRsin θ)
It writes, indicates l-1 and l+1 rank Bessel function.H is magnetic field strength, and E is electric field strength, Eρ、HρDeng being electric field, magnetic field in cylindrical coordinates
All directions component in system；ω is electromagnetism angular frequency, and k is wave number in free space, and ε is the dielectric constant in free space.
In a creative way, above each effect is individually present, moreover it is possible to the combination of the above results is completed with a nested structure.
It is clear that the technical effect that the above structure is realized is realized, if the additional technical solution is not taken into account, this patent title is also
It can a kind of new antenna.Part details is not shown in the figure.
It should be noted that multiple schemes that this patent provides include the basic scheme of itself, independently of each other, not mutually
It restricts, but it can also be combined with each other in the absence of conflict, reach multiple effects and realize jointly.
Basic principles, main features, and advantages of the present invention has been shown and described above.Ability
The technical staff in domain should be recognized that the present utility model is not limited to the above embodiments, described in the above embodiment and specification
Only illustrate the principles of the present invention, on the premise of not departing from the spirit and scope of the utility model, the utility model can also
There are various changes and modifications, these changes and improvements are both fallen in claimed range.
Claims (4)
1. a kind of list is around spiral OAM antenna, which is characterized in that antenna includes a metal spiral (1) and bowl-type metallic reflection plate
(3)；Both coaxial feeder inner conductor one (6) and coaxial feeder outer conductor one (4) constitute whole coaxial feeder；Outside coaxial feeder
It welds the bottom of conductor one (4) and bowl-type metallic reflection plate (3)；Coaxial feeder inner conductor one (6) and metal spiral (1) are welded,
Bowl-type metallic reflection plate (3) bottom is provided with hole (8), penetrates for coaxial feeder one.
2. a kind of list as described in claim 1 is around spiral OAM antenna, which is characterized in that driving source is through the coaxial feeder one
It can be fed to the metal spiral (1), corresponding current distribution can be evoked on the metal spiral (1) surface.
3. a kind of list as described in claim 1 is around spiral OAM antenna, which is characterized in that metal spiral (1) overall length is compared
Longer in electromagnetic wavelength, metal spiral (1) surface current approximation is distributed in unreflected traveling wave；Metal spiral (1) overall length is
Single turn ring perimeter is multiplied by total number of turns contained by metal spiral (1).
4. a kind of spiral OAM antenna, which is characterized in that antenna includes two metal spirals (1) and a bowl-type metallic reflection plate
(3)；Both coaxial feeder inner conductor one (6) and coaxial feeder outer conductor one (4) constitute whole coaxial feeder one, coaxial feeder
Both inner conductor two (7) and coaxial feeder outer conductor two (5) constitute whole coaxial feeder two；Coaxial feeder outer conductor one (4)
And the bottom welding of coaxial feeder outer conductor two (5) and bowl-type metallic reflection plate (3)；Coaxial feeder inner conductor one (6) and
Coaxial feeder inner conductor two (7) and metal spiral (1) are welded, and bowl-type metallic reflection plate (3) bottom drives that there are two hole (8), for same
Feeder shaft penetrates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821780461.5U CN209088083U (en) | 2018-10-31 | 2018-10-31 | A kind of list is around spiral OAM antenna and spiral OAM antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821780461.5U CN209088083U (en) | 2018-10-31 | 2018-10-31 | A kind of list is around spiral OAM antenna and spiral OAM antenna |
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| Publication Number | Publication Date |
|---|---|
| CN209088083U true CN209088083U (en) | 2019-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821780461.5U Active CN209088083U (en) | 2018-10-31 | 2018-10-31 | A kind of list is around spiral OAM antenna and spiral OAM antenna |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109346850A (en) * | 2018-10-31 | 2019-02-15 | 朱永忠 | A kind of list is around spiral OAM antenna and spiral OAM antenna |
| CN112701486A (en) * | 2020-12-07 | 2021-04-23 | 电子科技大学 | Double-arm three-dimensional spiral antenna for generating vortex wave with comb-shaped modal spectrum |
-
2018
- 2018-10-31 CN CN201821780461.5U patent/CN209088083U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109346850A (en) * | 2018-10-31 | 2019-02-15 | 朱永忠 | A kind of list is around spiral OAM antenna and spiral OAM antenna |
| CN112701486A (en) * | 2020-12-07 | 2021-04-23 | 电子科技大学 | Double-arm three-dimensional spiral antenna for generating vortex wave with comb-shaped modal spectrum |
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