CN109037956A - A kind of super surface system of radar invisible with wave beam aggregation feature, radar - Google Patents
A kind of super surface system of radar invisible with wave beam aggregation feature, radar Download PDFInfo
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- CN109037956A CN109037956A CN201810578378.8A CN201810578378A CN109037956A CN 109037956 A CN109037956 A CN 109037956A CN 201810578378 A CN201810578378 A CN 201810578378A CN 109037956 A CN109037956 A CN 109037956A
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- radar
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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
- H01Q15/0013—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective
- H01Q15/004—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective using superconducting materials or magnetised substrates
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- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
Engineering device technique field the invention belongs to antenna components or in conjunction with antenna discloses a kind of super surface system of the radar invisible with wave beam aggregation feature, radar, and transmission-type unit is two layers of the dielectric-slab connected by metal column.It is cross that copper is covered in dielectric-slab upper surface, and the phase compensation needed may be implemented by the way that cross brachium is rationally arranged.According to phase compensation principle, transmission-type unit spider length is rationally arranged, the transmissive arrays of 8*8 are formed；Artificial magnetic conductor array and transmissive arrays are attached using screw, nut and sleeve to form a kind of super surface of the radar invisible with wave beam aggregation feature.By the present invention in that with frequency-selective surfaces with substituting the metal of traditional artificial magnetic conductor, ensure that artificial magnetic conductor array can its reflect frequency range realize RCS reduction while, transmission frequency range may be implemented electromagnetic wave wave beam convergence.
Description
Technical field
Engineering device technique field the invention belongs to antenna components or in conjunction with antenna, more particularly to it is a kind of with wave beam remittance
The super surface system of the radar invisible of poly- function, radar.
Background technique
Currently, the prior art commonly used in the trade is such thatStealth technology be study how to reduce by electromagnetic wave, sound wave,
A kind of technology that the detection systems such as infrared light and visible light detect, the technology are in one in hyundai electronics war is important
Hold.Wherein become the emphasis and hot spot of research for the radar stealth technology of electromagnetic wave.Radar Cross Section (RCS, Radar
Cross-Section) refer to and irradiate target in a certain direction, a kind of measurement of the Returning scattering power on assigned direction is
Target is characterized in the radar exploration technique, stealth and anti-stealth technology can recognize the important parameter of characteristic.It can be dropped by RCS reduction
The radar signature of our low target improves the survival ability of our radar so that enemy radar detection signal be made to weaken or fail.
It is the antenna on platform that our target RCS, which is contributed maximum, therefore the RCS for reducing our antenna becomes current research
Hot spot, the reduction of RCS will provide crucial effect for the electromagnetism war of complexity.Reduce RCS both at home and abroad at present frequently with radar
Absorbing material, changes antenna shapes and super surface at passive cancellation techniques.First two method is only applicable to high band；Change antenna
Shape can deteriorate the radiance of antenna, and RCS reduction effect is smaller.Super surface generallys use frequency-selective surfaces and artificial
Magnetic conductor reduces target RCS: it may be implemented to the metal of frequency of use selection surface alternate antenna the RCS reduction in frequency band,
But it cannot achieve the RCS reduction outside band, narrower bandwidth.Artificial magnetic conductor realizes RCS reduction by influencing scattered field, in pattern
Perfect electric conductor and artificial magnetic conductor are combined in structure to realize that two kinds of back waves that phase difference is 180 °, back wave are mutual
Interference realizes RCS reduction to counteract the scattered field in incident direction.In order to broaden bandwidth, through being designed frequently with two kinds
The artificial magnetic conductor that phase difference is 180 ° in frequency range carries out pattern and structures the formation, and then realizes the RCS reduction in broad frequency band.Usually
Metal surface is placed in using artificial magnetic conductor to reduce the RCS of metal.Due to artificial magnetic conductor using metal conduct
Ground, if therefore artificial magnetic conductor is loaded on antenna, will limit the radiation of electromagnetic wave, deteriorate antenna performance, usually only
It can apply to coating for metal surfaces.There is the technology cracked to artificial magnetic conductor array at present, enables the antenna to electromagnetism wave energy
It is enough to be radiated to free space, although solving the problems, such as that antenna can not radiate, due to carrying out processing of cracking to array,
The electromagnetic wave of enemy radar, so that RCS reduction performance can reduce, can lead to our thunder by gap direct projection to our radar surface
It is detected up to by enemy, reduces the survival rate of our radar to a certain extent.And the antenna performance after array of loading still can
There are a degree of deterioration, antenna gain meeting decrease to some degree, antenna pattern will appear certain deformity, antenna performance
Deterioration will lead to our radar scanning and detection performance be deteriorated, do not tackle the problem at its root.In conclusion guaranteeing
We radiates radar signal high-gain, and enemy radar signal is not reflected or scattered, and is that very contradiction is also one very scabrous
Project.And solve the problems, such as the research of emphasis and difficulty artificial magnetic conductor all has reflection characteristic as to(for) the electromagnetic wave of full rate
Point.In addition, antenna performance does not deteriorate not only after the array of designing load, can obtain being effectively improved instead is also current research
Another difficult point.
In conclusion problem of the existing technology is:The technology cracked at present to artificial magnetic conductor array, enables the antenna to
Enough to radiate electromagnetic wave to free space, RCS reduction performance can reduce, and the antenna performance after array of loading is still
Have a degree of deterioration.
Solve the difficulty and meaning of above-mentioned technical problem:It will lead to the change of RCS performance due to cracking to artificial magnetic conductor array
Difference, without cracking, will lead to electromagnetic wave can not be radiated, this is a contradictory insoluble problem.Therefore design one
The novel super surface of kind not only has no adverse effect aerial radiation while realizing RCS reduction, it is linear to improve day instead
Can, have the function of that converging wave beam becomes the hot spot and difficult point of research.This novel super surface will not only be only capable of improving us
The existence ability of radar can also be improved the communications reconnaissance ability of radar, there is very big application prospect in electromagnetism war.
Summary of the invention
In view of the problems of the existing technology, the present invention provides a kind of super tables of the radar invisible with wave beam aggregation feature
Plane system, radar.
The invention is realized in this way a kind of super surface system of radar invisible with wave beam aggregation feature, upper layer is behaved
Work magnetic conductance volume array, lower layer are transmission battle array, are linked between array by screw, nut and sleeve.The present invention is by 8*8 super tables
Face unit is constituted, and super surface cell consists of two parts: artificial magnetic conductor unit, transmission-type unit；Upper layer artificial magnetic conductor list
Member realizes RCS reduction by pattern group battle array, and lower layer's transmission-type unit realizes that wave beam converges according to phase compensation principle group battle array.
Further, it is rectangular metal that copper is covered on artificial magnetic conductor unit upper layer, is divided into: 0 ° of rotation and being rotated by 90 °
Unit.
Further, the submatrix that 0 ° of the rotation and the unit being rotated by 90 ° separately constitute 2*2 carries out pattern and structures the formation, in turn
Form the pattern array of 4*4.
Further, the transmission-type unit is two layers of the dielectric-slab connected by metal column；
It is cross that copper is covered in dielectric-slab upper surface.
Further, the artificial magnetic conductor unit, transmission-type unit use dielectric constant for 2.65 F4BM-2 dielectric-slab；
The artificial magnetic conductor unit, transmission-type cellular construction parameter value are as follows: t1=3mm, t2=2mm, h1=4mm, h2=
6mm, r=0.5mm, L1=4.7mm, W1=3mm, W2=6mm, W3=8mm, L2=14mm, d=4.3mm.
The super surface of radar invisible with wave beam aggregation feature is used another object of the present invention is to provide a kind of
The radar of system.
In conclusion advantages of the present invention and good effect are as follows:Transmission-type unit is two layers of Jie connected by metal column
Scutum.It is cross that copper is covered in dielectric-slab upper surface, and the phase compensation needed may be implemented by the way that cross brachium is rationally arranged.According to
Phase compensation principle is rationally arranged transmission-type unit spider length, forms the transmissive arrays of 8*8；Use screw, nut
Artificial magnetic conductor array and transmissive arrays are attached to form a kind of radar with wave beam aggregation feature with sleeve hidden
The super surface of body.
By the present invention in that with frequency-selective surfaces with substituting the metal of traditional artificial magnetic conductor, ensure that artificial magnetic conductance
The wave beam convergence of electromagnetic wave can may be implemented in transmission frequency range while it reflects frequency range and realizes RCS reduction in volume array.It passes
The artificial magnetic conductor of system suffers from the characteristic of reflection due to having used Metal ground in full frequency band to electromagnetic wave, can not load
With radar top.And the performance that will deteriorate antenna to the technology that artificial magnetic conductor is slotted is used, and RCS reduction effect can become
Difference can not be widely used.Frequency of use selection of the present invention surface substitution metal, overcoming traditional artificial magnetic conductor will lead to me
The shortcomings that electromagnetic wave of square radar emission is radiated without normal direction free space may be implemented and tradition in the frequency range of hostile electromagnetic wave
The identical function of artificial magnetic conductor, and at this end radar work frequency range in can guarantee electromagnetic wave normal through.With fluting
Technology compares, and while guaranteeing good RCS reduction effect, does not deteriorate antenna performance not only, instead due to transmission battle array
Effect, converges wave beam, optimizes the performance of antenna.
Detailed description of the invention
Fig. 1 is the super surface system structural representation of the radar invisible with wave beam aggregation feature provided in an embodiment of the present invention
Figure；
In figure: 1, artificial magnetic conductor unit；2, transmission-type unit.
Fig. 2 is the cellular construction of the radar invisible super surface system provided in an embodiment of the present invention with wave beam aggregation feature
Schematic diagram；
In figure: (a) side view；(b) artificial magnetic conductor upper layer covers copper and rotates 0 °；(c) copper rotation is covered on artificial magnetic conductor upper layer
90°；(d) artificial magnetic conductor underlying frequency selects surface；(e) low section transmission-type unit upper and lower medium layer.
Fig. 3 is that the super surface system working condition of the radar invisible with wave beam aggregation feature provided in an embodiment of the present invention is shown
It is intended to；
In figure: (a) radar invisible operation principle schematic diagram；(b) wave beam collects operation principle schematic diagram.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention 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.
By the present invention in that with frequency-selective surfaces with substituting the metal of traditional artificial magnetic conductor, ensure that artificial magnetic conductance
The wave beam convergence of electromagnetic wave can may be implemented in transmission frequency range while it reflects frequency range and realizes RCS reduction in volume array.
Application principle of the invention is described in detail with reference to the accompanying drawing.
As shown in Figure 1, the radar invisible super surface system provided in an embodiment of the present invention with wave beam aggregation feature includes:
Artificial magnetic conductor unit 1, transmission-type unit 2.
Artificial magnetic conductor unit 1 is connect by screw, nut and sleeve with transmission-type unit 2.
1 lower layer's frequency of use of artificial magnetic conductor unit selects face instead Metal ground, and the passband of frequency-selective surfaces is set
It is set to frequency band identical with our radar, stopband is set as the frequency band of enemy radar.In stopband, 1 work of artificial magnetic conductor unit
Make, it is rectangular metal that copper is covered on 1 upper layer of artificial magnetic conductor unit, and then unit is divided into two kinds: rotating 0 ° (A) and be rotated by 90 °
(B) unit, the phase difference for making electromagnetic wave form 180 ° on A and unit B by the way that reasonable length and width are arranged.Table is selected in frequency
In the passband in face, transmission-type cell operation.Transmission-type unit 2 is two layers of the dielectric-slab connected by metal column.Table on dielectric-slab
It is cross that copper is covered in face, and the phase compensation needed may be implemented by the way that cross brachium is rationally arranged.
Artificial magnetic conductor unit A and the B submatrix for separately constituting 2*2 are carried out pattern to structure the formation, and then form the chessboard of 4*4
Type array.According to phase compensation principle, transmission-type unit spider length is rationally arranged, the transmissive arrays of 8*8 are formed.Make
Artificial magnetic conductor array and transmissive arrays are attached to be formed one kind with wave beam convergence function with screw, nut and sleeve
The super surface of radar invisible of energy.
Application principle of the invention is further described with reference to the accompanying drawing.
As shown in Figure 1-Figure 3: layer unit is all made of the F4BM-2 dielectric-slab that dielectric constant is 2.65 to the present invention up and down, this
Dielectric-slab is while ensure that cheap with stable dielectric constant.Cellular construction parameter value are as follows: t1=3mm, t2=
2mm,h1=4mm, h2=6mm, r=0.5mm, L1=4.7mm, W1=3mm, W2=6mm, W3=8mm, L2=14mm, d=
4.3mm.It ensure that artificial magnetic conductor A and B reflection frequency range (13.5-18GHz) have 180 ± 30 ° phase difference and
There is the transmissivity of phase cone of coverage and 88% greater than 250 ° or more in transmission frequency point (8.7GHz) transmission-type unit.In addition,
Traditional transmission-type unit broadens phase cone of coverage using multilayered structure, and this method seriously increases the section of array, is not easy to
It installs, transmission-type unit has used two layers of metal column connection transmission-type unit in the present invention, is realizing the same of low section structure
When the transmissivity with higher phase cone of coverage sum.
After the 2*2 subarray progress pattern of artificial magnetic conductor A and B are structured the formation, there can be RCS reduction to enemy radar
Performance.Distance of the pre-set array apart from radar, transmission battle array can be by radar emission by the phase compensation of unit
Electromagnetic wave plane wave is converted to by spherical wave, enhance the directionality of wave beam, converged radar beam, improve gain.
The present invention is fixed on above radar according to pre-set distance, when enemy radar is irradiated to our radar
When, it can be irradiated in the present invention first.It is of the invention since the electromagnetic wave of enemy radar radiation is in stopband (13.5-18GHz)
A, the electromagnetic wave that B subarray can emit enemy radar reflects, and the electromagnetic wave phase differences of two groups of submatrixs reflection are about
180 °, the electromagnetic wave that two kinds of phase differences are 180 ° is interfered with each other, and will be offset in incident direction, to reduce
RCS in incident direction plays the role of our radar stealthy.As our radar emission electromagnetic wave (8.7GHz), quasi- ball
Surface wave is due to path length difference, and phase has difference when reaching the present invention, by the way that the long progress phase compensation of spider is rationally arranged, makes electricity
Spherical wave is converted into plane wave by magnetic wave phase having the same, and since our wave frequency is in passband, electromagnetic wave
It can guarantee that high-gain, the characteristic of Sidelobe are radiated, converge wave beam.
The present invention has very strong expansion, can be applied to the RCS reduction and wave beam convergence of multiple caliber radar.Only need
Reasonable super surface bore is set according to the size of radar, and according to the phase compensation size of preset Focussing unit,
It can realize to the RCS reduction of many kinds of radar and wave beam aggregation feature.
8*8 array of the invention is suitable for the radar of 120mm*120mm bore.When being applied to different radars, artificial magnetic
The submatrix of conductor element is still structured the formation using pattern, and different location transmission-type is arranged according to preset focal length and phase compensation principle
The brachium of unit metal cross, selecting suitable array scale size, composition is identical as radar bore or slightly larger than radar mouth in turn
The array of diameter, the performance of load and the RCS reduction and wave beam convergence that above radar, can realize different radars.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (6)
1. a kind of super surface system of radar invisible with wave beam aggregation feature, which is characterized in that described that there is wave beam to converge function
The super surface system of radar invisible of energy includes: artificial magnetic conductor unit, transmission-type unit；Artificial magnetic conductor unit by screw,
Nut and sleeve are connect with transmission-type unit；
Artificial magnetic conductor unit realizes RCS reduction by pattern group battle array；Lower layer's transmission-type unit is according to phase compensation principle group
Battle array realizes wave beam convergence.
2. as described in claim 1 with the super surface system of radar invisible of wave beam aggregation feature, which is characterized in that the people
It is rectangular metal that copper is covered on work magnetic conductance body unit upper layer, is divided into: 0 ° of rotation and the unit being rotated by 90 °.
3. as claimed in claim 2 with the super surface system of radar invisible of wave beam aggregation feature, which is characterized in that the rotation
Turn 0 ° and the unit that is rotated by 90 ° separately constitutes the submatrix of 2*2 and carries out pattern and structure the formation, and then forms the pattern array of 4*4.
4. as described in claim 1 with the super surface system of radar invisible of wave beam aggregation feature, which is characterized in that described
Emitting unit is two layers of the dielectric-slab connected by metal column；
It is cross that copper is covered in dielectric-slab upper surface.
5. as described in claim 1 with the super surface system of radar invisible of wave beam aggregation feature, which is characterized in that the people
Work magnetic conductance body unit, transmission-type unit use dielectric constant for 2.65 F4BM-2 dielectric-slab；
The artificial magnetic conductor unit, transmission-type cellular construction parameter value are as follows: t1=3mm, t2=2mm, h1=4mm, h2=6mm, r
=0.5mm, L1=4.7mm, W1=3mm, W2=6mm, W3=8mm, L2=14mm, d=4.3mm.
6. a kind of super surface system of radar invisible using described in 5 any one of Claims 1 to 5 with wave beam aggregation feature
Radar.
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| CN111262018A (en) * | 2020-02-02 | 2020-06-09 | 西南交通大学 | Broadband low RCS patch antenna based on FSS transmission and reflection cancellation |
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| CN110098487A (en) * | 2019-04-25 | 2019-08-06 | 中国传媒大学 | A kind of super surface of ULTRA-WIDEBAND RADAR scattering section reduction |
| CN110504549A (en) * | 2019-07-26 | 2019-11-26 | 西安电子科技大学 | Suction based on graphene integrated frequency-selective surfaces thoroughly |
| CN110504549B (en) * | 2019-07-26 | 2020-11-03 | 西安电子科技大学 | Graphene-based absorption-transmission integrated frequency selection surface |
| CN111262018A (en) * | 2020-02-02 | 2020-06-09 | 西南交通大学 | Broadband low RCS patch antenna based on FSS transmission and reflection cancellation |
| CN111262018B (en) * | 2020-02-02 | 2021-03-16 | 西南交通大学 | Broadband low RCS patch antenna based on FSS transmission and reflection cancellation |
| CN111799568A (en) * | 2020-06-03 | 2020-10-20 | 福瑞泰克智能***有限公司 | Radar cross section reducing surface, radar and vehicle |
| CN111799568B (en) * | 2020-06-03 | 2022-04-22 | 福瑞泰克智能***有限公司 | Radar cross section reducing surface, radar and vehicle |
| CN111900546A (en) * | 2020-08-18 | 2020-11-06 | 西安电子科技大学 | Hybrid-mechanism electromagnetic super-surface for wide-band wide-angle RCS reduction |
| CN113013607A (en) * | 2021-02-25 | 2021-06-22 | 西南交通大学 | Low profile low RCS Fabry-Perot resonator antenna |
| CN113013607B (en) * | 2021-02-25 | 2022-02-01 | 西南交通大学 | Low profile low RCS Fabry-Perot resonator antenna |
| CN115334524A (en) * | 2022-06-30 | 2022-11-11 | 中通服咨询设计研究院有限公司 | Communication and radar target detection method based on omnidirectional intelligent super surface |
| CN115334524B (en) * | 2022-06-30 | 2024-03-08 | 中通服咨询设计研究院有限公司 | Communication and radar target detection method based on omnidirectional intelligent super surface |
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