CN108777367A - A kind of insensitive super surface array of electromagnetic camouflage of X-band polarization - Google Patents
A kind of insensitive super surface array of electromagnetic camouflage of X-band polarization Download PDFInfo
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- CN108777367A CN108777367A CN201810532713.0A CN201810532713A CN108777367A CN 108777367 A CN108777367 A CN 108777367A CN 201810532713 A CN201810532713 A CN 201810532713A CN 108777367 A CN108777367 A CN 108777367A
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- super surface
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- camouflage
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
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Abstract
The invention discloses a kind of insensitive super surface arrays of electromagnetic camouflage of X-band polarization.The super surface array is made of the super surface cell of multiple phase gradients, and each super surface cell includes one piece of medium substrate, and a metal ring is arranged in medium substrate front and a square-shaped metal patch, the back side are coated with one layer of metal substrate；Positive metal ring and metal patch are coupled with the metal substrate at the back side generates magnetic resonance, size by changing metal patch realizes the regulation and control to reflecting wave phase, when phase covers 2 π ranges, designed phase gradient, unit is arranged in battle array, the two-dimentional super surface of reflected phase gradient can be obtained, realizes the regulation and control to reflection of electromagnetic wave direction.The present invention is by rebuilding the scattered field of scatterer, and can disguise oneself as plane curved surface, and inclined-plane disguises oneself as plane, and curved surface disguises oneself as plane, realizes arbitrary electromagnetic camouflage.
Description
Technical field
The present invention relates to electromagnetic camouflage fields, the especially a kind of insensitive super surface array of electromagnetic camouflage of X-band polarization.
Background technology
The steal th and anti-stealth of radar detection is always one of the difficult point studied and hot spot.By being coated on military target
Wave stealth material is inhaled, the Radar Cross Section of target is reduced, is traditional effective electromagnetism stealth design means.But it is hidden to inhale wave
The thickness of shape material is related with the working frequency of radar, and in low frequency, the absorbing property of material can significantly reduce.
Electromagnetism Meta Materials are theoretical using traditional transform optics, can form stealthy cape, microwave frequency band has been realized in
The electromagnetism stealth of three-dimensional metamaterial.But the existing stealthy cape electromagnetism Meta Materials of three-dimensional have heterogeneity and anisotropy, tool
It is difficult to prepare, is lost that high, bandwidth of operation is narrow, cannot meet the needs of engineering.The super surface of electromagnetism is dissipated in reduction radar
Sectional area is penetrated, has done a large amount of research in terms of realizing electromagnetism stealth, but stealth effect depends critically upon incoming electromagnetic wave polarization
And angle.
Invention content
Plane can be disguised oneself as curved surface the purpose of the present invention is to provide one kind, inclined-plane disguises oneself as plane, curved surface camouflage
At the insensitive super surface array of electromagnetic camouflage of X-band polarization of plane, to realize arbitrary electromagnetic camouflage.
Realize that the technical solution of the object of the invention is：A kind of insensitive super surface array of electromagnetic camouflage of X-band polarization,
Array structure is formed by the super surface cell of multiple phase gradients, each super surface cell of phase gradient includes one piece of medium substrate,
A metal ring is arranged in medium substrate front and a square-shaped metal patch, the back side are coated with one layer of metal substrate；It is positive
Metal ring and metal patch are coupled with the metal substrate at the back side generates magnetic resonance, by the size realization pair for changing metal patch
Reflect the regulation and control of wave phase.
As a preferred embodiment, the outer diameter of the metal ring in the super surface cell of the phase gradient is r, and width is
0.2mm, the length of side a of square-shaped metal patch and the outer diameter r of metal ring meet relational expressionPass through change
The outer diameter of circular metal ring patch adjusts the phase of back wave.
As a preferred embodiment, the medium substrate in the super surface cell of the phase gradient is relative dielectric constant εrFor
4.4 FR-4 epoxy glass cloth laminated boards, length of side L are 8mm, thickness 2mm.
As a preferred embodiment, it is described by the super surface cell of multiple phase gradients form array structure be 1 × 30 or 1 ×
The center spacing of 60 arrays, the super surface cell of adjacent phase gradient is 8mm.
As a preferred embodiment, the gradient distribution of the reflected phase on the stealthy super surface on object, according to following formula
It determines：
WhereinIt is the shape of the phase gradient and virtual objects on stealthy super surface respectively, (x, y) is super
The corresponding coordinate in surface；k0Be wave vector, the θ of free space it is the angle of incident electromagnetic wave.
As a preferred embodiment, the gradient distribution for pretending the reflected phase on super surface, determines according to following formula：
Whereinz0(x, y) is the phase gradient for pretending super surface, the reflected phase and void of virtual objects respectively
The shape of quasi- object, (x, y) are the corresponding coordinate in super surface；k0Be wave vector, the θ of free space it is the angle of incident electromagnetic wave
Degree.
Compared with prior art, the present invention its remarkable advantage is：(1) the super surface cell of sub-wavelength dimensions, volume are used
It is small, simple in structure, it is convenient for producing in batches, it is at low cost；(2) the full symmetric super surface cell of structure has good polarization
Insensitivity energy can realize arbitrary electromagnetic camouflage, will be bent by inclined-plane disguise as plane by plane disguise as arbitrary surface
Face disguise as plane；(3) when incidence wave is from relatively wide angular range, it can will pretend super structure surface itself and disguise oneself as arbitrarily
Object, it is highly practical, new thinking is provided to the design and production of electromagnetic camouflage equipment.
Description of the drawings
Fig. 1 is that the phase gradient in the present invention polarizes the structural schematic diagram of insensitive super surface cell, wherein (a) is unit
Structure top view (b) is cellular construction side view.
Fig. 2 is that the RCS figures of the super surface array of plane electromagnetic camouflage in the embodiment of the present invention and the RCS of virtual architecture scheme.
Fig. 3 is that the RCS figures of the super surface array of simple bevel electromagnetic camouflage in the embodiment of the present invention and the RCS of plane scheme.
Fig. 4 is that the RCS figures of electromagnetic camouflage super surface array in flat-top inclined-plane in the embodiment of the present invention and the RCS of plane scheme,.
Fig. 5 is that the RCS figures of the super surface array of mean camber electromagnetic camouflage of the embodiment of the present invention and the RCS of plane scheme.
Specific implementation mode
Below in conjunction with the accompanying drawings and specific embodiment present invention is further described in detail.
In conjunction with Fig. 1 (a)~(b), the insensitive super surface array of electromagnetic camouflage of X-band polarization of the present invention, the super surface array
Array structure is formed by the super surface cell of multiple phase gradients, each super surface cell of phase gradient includes one piece of medium substrate 3,
3 front one metal ring 2 of setting of medium substrate and a square-shaped metal patch 1, the back side are coated with one layer of metal substrate 4；Just
The metal ring 2 and metal patch 1 in face are coupled with the metal substrate 4 at the back side generates magnetic resonance, by the ruler for changing metal patch 1
The very little regulation and control realized to reflecting wave phase.When phase covers 2 π ranges, unit is arranged in battle array by the phase gradient of reasonable design
Row, you can obtain the two-dimentional super surface of reflected phase gradient that can be regulated and controled to reflection of electromagnetic wave direction.The super surface of the camouflage is logical
The scattered field for rebuilding scatterer is crossed, can disguise oneself as plane curved surface, and inclined-plane disguises oneself as plane, and curved surface pretends city plane, realize
Arbitrary electromagnetic camouflage.
As a preferred embodiment, the outer diameter of the metal ring 2 in the super surface cell of the phase gradient is r, and width is
0.2mm, the length of side a of square-shaped metal patch 1 and the outer diameter r of metal ring 2 meet relational expressionBy changing
Become the outer diameter of round becket patch 2 to adjust the phase of back wave.
As a preferred embodiment, the medium substrate in the super surface cell of the phase gradient is relative dielectric constant εrFor
4.4 FR-4 epoxy glass cloth laminated boards, length of side 8mm, thickness 2mm.
As a preferred embodiment, it is described by the super surface cell of multiple phase gradients form array structure be 1 × 30 or 1 ×
The center spacing of 60 arrays, the super surface cell of adjacent phase gradient is 8mm.
As a preferred embodiment, in order to make back wave appear to scatter from flat metal surface, on object
Stealthy super surface reflected phase gradient distribution, determined according to following formula：
WhereinIt is the shape of the phase gradient and virtual objects on stealthy super surface respectively, (x, y) is super
The corresponding coordinate in surface；k0Be wave vector, the θ of free space it is the angle of incident electromagnetic wave.
Further, in order to make the back wave on super surface appear to scatter out from arbitrary dummy object,
The gradient distribution of the reflected phase on the super surface of camouflage, determines according to following formula：
Whereinz0(x, y) is the phase gradient for pretending super surface, the reflected phase and void of virtual objects respectively
The shape of quasi- object, (x, y) are the corresponding coordinate in super surface；k0Be wave vector, the θ of free space it is the angle of incident electromagnetic wave
Degree.
X-band of the present invention polarize the super surface array of insensitive electromagnetic camouflage parameter designing process it is as follows：
(1) optimize the super surface cell structure of phase gradient, metal is determined according to the working frequency range 10Ghz of electromagnetic camouflage
The outer diameter r of annulus and the relational expression of the length of side a of square-shaped metal piece and the thickness h of super surface cell medium substrate；
(2) thickness h for adjusting dielectric-slab, enables the variation range of its reflected phase to cover 2 π, and reflectance factor is more than 0.8；
(3) length of side L for adjusting dielectric-slab, enables the variation range of its reflected phase to cover 2 π, and reflectance factor is more than 0.8.
Embodiment 1
In conjunction with Fig. 1, the cellular construction for the super surface array of insensitive electromagnetic camouflage that polarized according to X-band of the present invention devises
The super surface array of plane electromagnetic camouflage of one 1 × 30 structure：Working frequency is 10GHz, the super surface cell of plane electromagnetic camouflage
Three layers are shared, is respectively from down to up：Metal substrate 4, medium substrate 3, metal ring 2 and square-shaped metal patch 1；Its intermediary
Matter substrate 3 is relative dielectric constant εrFor 4.4FR-4 epoxy glass cloth laminated boards, length of side 8mm, thickness 2mm；Metal ring
2 outer diameter is r, width 0.2mm；The length of side a of the square-shaped metal patch 1 and outer diameter r of metal ring 2 meets relational expression
Fig. 2 be the super surface array of plane electromagnetic camouflage in Phi=90deg in the embodiment of the present invention RCS figures with it is virtual
The RCS of structure schemes.It can be seen that, it is desirable to virtual sin curved surfaces are close with the plane super far-field RCS on surface of camouflage, to confirm
Plane pretends the electromagnetic camouflage performance on super surface.In addition, since used super surface cell is full symmetric structure, it should
Super surface array has the insensitive performance that polarizes.
Fig. 3 be the super surface array of simple bevel electromagnetic camouflage in Phi=90deg in the embodiment of the present invention RCS figure with
The RCS of plane schemes.As can be seen that the electromagnetic wave RCS that inclined-plane pretends super surface reflection is close with the RCS of plane wave, to confirm
Plane pretends the electromagnetic camouflage performance on super surface.In addition, since used super surface cell is full symmetric structure, it should
Super surface array has the insensitive performance that polarizes.
Fig. 4 is the RCS of 1 × 60 super surface array of flat-top inclined-plane electromagnetic camouflage in Phi=90deg in the embodiment of the present invention
Figure and the RCS of plane scheme.It can be seen that, it is desirable to virtual simple flat surface is close with the flat-top inclined-plane super far-field RCS on surface of camouflage,
To confirm that flat-top inclined-plane pretends the electromagnetic camouflage performance on super surface.In addition, since used super surface cell is complete
Symmetrical structure, the super surface array have the insensitive performance that polarizes.
Fig. 5 be 1 × 30 super surface array of curved surface electromagnetic camouflage in Phi=90deg in the embodiment of the present invention RCS figure with
The RCS of plane schemes.It can be seen that, it is desirable to virtual simple flat surface is close with the curved surface super far-field RCS on surface of camouflage, to confirm
Curved surface pretends the electromagnetic camouflage performance on super surface.In addition, since used super surface cell is full symmetric structure, it should
Super surface array has the insensitive ability that polarizes.
The insensitive super surface array of electromagnetic camouflage in conclusion X-band of the present invention polarizes can realize that arbitrary electromagnetism is pseudo-
Dress.By using the insensitive super surface cell of sub-wavelength of polarizing, can on sub-wavelength dimensions the super surface of local directed complete set scattering
, arbitrary scattered field is rebuild, achievees the purpose that electromagnetic camouflage.Scattered field by comparing virtual architecture and its corresponding camouflage
Super surface has carried out experimental verification to the electromagnetic camouflage method proposed.The phase compensation of the super surface cell of camouflage proposed
It can work well in relatively wide incident angle range, there is very strong practicability, not only can be adapted for plane, also
It can be applied to inclined-plane and curved surface pretended.Super surface texture is simple and is easy to make, and had it is arbitrary formability thereof,
It is a selection well of electromagnetic camouflage application.
Claims (6)
- The insensitive super surface array of electromagnetic camouflage 1. a kind of X-band polarizes, which is characterized in that single by the super surface of multiple phase gradients Member composition array structure, each super surface cell of phase gradient include one piece of medium substrate (3), the setting of medium substrate (3) front One metal ring (2) and a square-shaped metal patch (1), the back side are coated with one layer of metal substrate (4)；Positive metal ring (2) it is coupled with the metal substrate (4) at the back side with metal patch (1) and generates magnetic resonance, it is real by the size for changing metal patch (1) Now to the regulation and control of reflection wave phase.
- The insensitive super surface array of electromagnetic camouflage 2. X-band according to claim 1 polarizes, which is characterized in that the phase The outer diameter of metal ring (2) in the super surface cell of potential gradient is r, width 0.2mm, the length of side a of square-shaped metal patch (1) Meet relational expression with the outer diameter r of metal ring (2)By the outer diameter for changing circular metal ring patch (2) To adjust the phase of back wave.
- The insensitive super surface array of electromagnetic camouflage 3. X-band according to claim 1 or 2 polarizes, which is characterized in that described Medium substrate (3) in the super surface cell of phase gradient is relative dielectric constant εrFor 4.4 FR-4 epoxy glass cloth laminated boards, Length of side L is 8mm, thickness 2mm.
- The insensitive super surface array of electromagnetic camouflage 4. X-band according to claim 1 or 2 polarizes, which is characterized in that described It is 1 × 30 or 1 × 60 array, the super surface cell of adjacent phase gradient to form array structure by the super surface cell of multiple phase gradients Center spacing be 8mm.
- The insensitive super surface array of electromagnetic camouflage 5. X-band according to claim 2 polarizes, which is characterized in that on object Stealthy super surface reflected phase gradient distribution, determined according to following formula：Whereinz0(x, y) is the shape of the phase gradient and virtual objects on stealthy super surface respectively, and (x, y) is super surface pair The coordinate answered；k0Be wave vector, the θ of free space it is the angle of incident electromagnetic wave.
- The insensitive super surface array of electromagnetic camouflage 6. X-band according to claim 2 polarizes, which is characterized in that camouflage is super The gradient of the reflected phase on surface is distributed, and is determined according to following formula：Whereinz0(x, y) is to pretend the phase gradient on super surface, the reflected phase of virtual objects and virtual right respectively The shape of elephant, (x, y) are the corresponding coordinate in super surface；k0Be wave vector, the θ of free space it is the angle of incident electromagnetic wave.
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Cited By (6)
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|---|---|---|---|---|
| CN110011058A (en) * | 2019-04-03 | 2019-07-12 | 浙江科技学院 | A kind of super surface orbitals angular momentum array antenna that reflectivity is good |
| CN110544832A (en) * | 2019-08-23 | 2019-12-06 | 南京理工大学 | Dynamic camouflage super-surface with double-frequency point electromagnetic characteristic capable of being actively and electrically adjusted |
| CN110739551A (en) * | 2019-10-29 | 2020-01-31 | Oppo广东移动通信有限公司 | Array lens, lens antenna, and electronic apparatus |
| CN110797662A (en) * | 2019-06-04 | 2020-02-14 | 曲阜师范大学 | Broadband reflection type electromagnetic wave polarization rotating super surface |
| CN111628285A (en) * | 2020-06-28 | 2020-09-04 | 北京星英联微波科技有限责任公司 | Phase gradient super-surface antenna unit and antenna |
| CN113745841A (en) * | 2021-07-29 | 2021-12-03 | 中国人民解放军92728部队 | Conformal electromagnetic stealth super surface and design method thereof |
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Cited By (7)
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|---|---|---|---|---|
| CN110011058A (en) * | 2019-04-03 | 2019-07-12 | 浙江科技学院 | A kind of super surface orbitals angular momentum array antenna that reflectivity is good |
| CN110797662A (en) * | 2019-06-04 | 2020-02-14 | 曲阜师范大学 | Broadband reflection type electromagnetic wave polarization rotating super surface |
| CN110544832A (en) * | 2019-08-23 | 2019-12-06 | 南京理工大学 | Dynamic camouflage super-surface with double-frequency point electromagnetic characteristic capable of being actively and electrically adjusted |
| CN110739551A (en) * | 2019-10-29 | 2020-01-31 | Oppo广东移动通信有限公司 | Array lens, lens antenna, and electronic apparatus |
| CN111628285A (en) * | 2020-06-28 | 2020-09-04 | 北京星英联微波科技有限责任公司 | Phase gradient super-surface antenna unit and antenna |
| CN113745841A (en) * | 2021-07-29 | 2021-12-03 | 中国人民解放军92728部队 | Conformal electromagnetic stealth super surface and design method thereof |
| CN113745841B (en) * | 2021-07-29 | 2023-08-29 | 中国人民解放军92728部队 | Conformal electromagnetic stealth subsurface and design method thereof |
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