CN109037947A - A kind of low RCS antenna - Google Patents
A kind of low RCS antenna Download PDFInfo
- Publication number
- CN109037947A CN109037947A CN201810821176.1A CN201810821176A CN109037947A CN 109037947 A CN109037947 A CN 109037947A CN 201810821176 A CN201810821176 A CN 201810821176A CN 109037947 A CN109037947 A CN 109037947A
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- CN
- China
- Prior art keywords
- antenna
- rcs
- artificial surface
- coupling medium
- surface phasmon
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Classifications
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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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
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- Aerials With Secondary Devices (AREA)
Abstract
The invention discloses a kind of low RCS antennas, comprising: artificial surface phasmon coupling medium and feed structure, feed structure include monopole antenna and earth plate, and monopole antenna is arranged on earth plate；Artificial surface phasmon coupling medium is arranged on earth plate；Artificial surface phasmon coupling medium includes periodical metal unit array and medium substrate, and periodical metal unit array is arranged in medium substrate surface.Therefore, low RCS antenna provided in an embodiment of the present invention makes the antenna in weak dispersion area by strong-weak dispersion area in regulation artificial surface phasmon dispersion curve, and electromagnetic wave along coupling medium high efficiency of transmission and can radiate；And in strong dispersion area, electromagnetic wave is then strongly absorbed.The antenna structure is simple, is processed using printed-board technology, is at low cost, is easily conformal, and under the premise of guaranteeing efficiently to transmit/receive performance, it is obvious that RCS reduces effect, even if all having good RCS in larger angular domain reduces effect.
Description
Technical field
The present invention relates to antenna technical field more particularly to a kind of low RCS antennas.
Background technique
Stealthyization is the inexorable trend of the modern and following weapon platform development.Stealthy Platform Designing generally passes through full ruler first
The RCS of very little all-metal platform, which is tested, determines Stealth shape, but this is only the first step of stealthing design.True weapon platform executes
Combat mission relies on the various antennas (communication and navigation, electronic support, enemy and we's identification etc.) carried thereon, to open up difference thereon
Antenna aperature, any one antenna aperature processing is not good at all bringing complete machine Stealth Fighter totally unfavorable influence.So
Any stealthy platform will put into very big energy on antenna aperature stealthing design, and antenna aperature stealthing design is stealthy platform
Design indispensable component part.Currently, antenna aperature is stealthy, there are mainly two types of technological means: first is that by loading stealthy day
Irdome prevents enemy radar wave from entering antenna aperature；First is that reducing the electricity of antenna itself by designing low RCS antenna radiator
Magnetic scattering characteristic.
There are mainly three types of technological means for the low RCS antenna radiator design of tradition: first is that loading artificial electromagnetic on antenna floor
Surface is offseted by scattering, polarization mismatch and inhales the means such as wave and reduce Antenna/RCS.But since artificial electromagnetic surface will account for
According to biggish space, this technology is suitable for the lesser planar antennas/antenna array of radiator duty；In addition, artificial electromagnetic table
The structural unit in face will be maintained a certain distance with antenna radiator, be avoided to antenna feed impedance, directional diagram, gain, polarization
Purity etc. has an adverse effect.Second is that such as cracking, adding on antenna radiator using particulate metal structure as antenna radiator
It carries metalized ground via hole or using the labyrinths such as shape are divided, reduces the duty ratio of metal, reduce Antenna/RCS.But it is this
Technological means is only applicable to offset printing monopole antenna, Vivaldi antenna, micro-strip paster antenna etc..Third is that part is reflected
Surface and absorbing material/absorbent structure layer, polarization conversion layer or diffusing structure layer etc. are compound to be used as antenna cover.This framework energy
Enough guarantee the efficient eradiation of antenna, to reduce Antenna/RCS, but is not useful as receiving antenna.
Thus, prior art means, which are both needed to additionally load, inhales wave/diffusing structure reduction Antenna/RCS, antenna radiator itself
Without absorbing property.So that RCS reduces limited extent；And RCS reduces degradation under oblique firing angle, or even certain
RCS will increase under oblique firing angle.
Summary of the invention
The embodiment of the invention provides a kind of low RCS antenna, solves to need additionally to load in the prior art and inhale wave/scattering knot
Structure reduces the problem of Antenna/RCS.
Low RCS antenna provided in an embodiment of the present invention, comprising: artificial surface phasmon coupling medium and feed structure,
The feed structure includes monopole antenna and earth plate, and the monopole antenna is arranged on the earth plate；It is described artificial
Surface phasmon coupling medium is arranged on the earth plate, and the monopole antenna is located at described artificial surface etc. from sharp
The side of first coupling medium；The artificial surface phasmon coupling medium includes periodical metal unit array and medium base
Plate, the periodicity metal unit array are arranged in the medium substrate surface.
Preferably, low RCS antenna provided in an embodiment of the present invention, the periodicity metal unit array is zigzag knot
The length of structure, sawtooth is gradually reduced along the bottom end of the medium substrate to top.
Preferably, low RCS antenna provided in an embodiment of the present invention, the periodicity metal unit array etching is in being given an account of
Matter substrate surface.
Preferably, low RCS antenna provided in an embodiment of the present invention, the monopole antenna is printed monopole antenna.
To sum up, low RCS antenna provided in an embodiment of the present invention passes through setting artificial surface phasmon coupling medium and feedback
Electric structure, artificial surface phasmon coupling medium are formed by the way that metal array is arranged on medium substrate, and feed structure includes
Earth plate and the monopole antenna being arranged on earth plate, and artificial surface phasmon coupling medium is arranged in earth plate
On, and monopole antenna is located at the side of artificial surface phasmon coupling medium, so as to regulate and control artificial surface etc. from sharp
Strong-weak dispersion area in first dispersion curve allows the antenna in weak dispersion area electromagnetic wave along coupling medium high efficiency of transmission and spoke
It penetrates；And in strong dispersion area, electromagnetic wave is then strongly absorbed, and the antenna structure is simple, is processed using printed-board technology, cost
It is low, easily conformal, and under the premise of guaranteeing efficiently to transmit/receive performance, RCS reduction effect is obvious, even if having in larger angular domain
There is good RCS reduction effect.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of low RCS antenna provided in an embodiment of the present invention；
Fig. 2 is the schematic diagram of product structure of low RCS antenna provided in an embodiment of the present invention；
Fig. 3 is the S11 curve and peak value of emulation and the experiment test of single low RCS antenna provided in an embodiment of the present invention
Gain curve；
Fig. 4 is the face E, the face H directional diagram at single low RCS antenna different frequent points provided in an embodiment of the present invention；
Fig. 5 be provided in an embodiment of the present invention 5 × 5 low RCS aerial arrays and with size metallic plate at different frequent points, no
With in the case of the plane of incidence, same polarization wave irradiation when mono- static RCS test curve；
Fig. 6 is for provided in an embodiment of the present invention 5 × 5 low RCS aerial arrays and with size metallic plate in same polarization electromagnetic wave
Mono- static RCS test curve when vertical incidence.
Specific embodiment
Below with reference to the attached drawing in the present invention, clear, complete description is carried out to the technical solution of the embodiment of the present invention, is shown
So, described embodiment is a part of the embodiments of the present invention, rather than whole embodiments.Based on the implementation in the present invention
Example, those of ordinary skill in the art's every other embodiment obtained without making creative work, is all answered
Belong to the scope of protection of the invention.
It should be understood that artificial surface phasmon (Spoof Surface Plasmon Polaritons, SSPP) is electromagnetism
Wave couples the surface electromagnetic mode of the height localization generated with the electronic in artificial electromagnetic medium, and wavelength X sspp is remote
Less than the wavelength X of free space electromagnetic wave0, have the characteristics such as wavelength is short, dispersion is strong, it can be achieved that electromagnetism wave amplitude, phase, pole
Change the regulation with attributes such as communication modes.The dispersion curve of SSPP is non-linear by the weak dispersion area of low-frequency range approximately linear and high band
Strong dispersion area constitute, be realize electromagnetic wave regulation ideal electromagnetic mode, can be applied to radar absorbing, Achromatic device,
The design of new antenna etc..It particularly, can be two neighboring by the comprehensive regulation to SSPP linear and nonlinear dispersion area
Frequency range realizes different electromagnetism adjusting functions, has important application value in multifunctional stealth materials design.
A kind of low RCS antenna provided below by Fig. 1 to Fig. 6 the present invention will be described in detail embodiment.As shown, the day
Line may include:
Artificial surface phasmon coupling medium 1 and feed structure 2, feed structure 2 include monopole antenna 21 and ground connection
Plate, monopole antenna 21 are arranged on earth plate 22；Artificial surface phasmon coupling medium 1 is arranged on earth plate 22, and
Monopole antenna 21 is located at the side of artificial surface phasmon coupling medium 1；Artificial surface phasmon coupling medium 1 includes
Periodical metal unit array 11 and medium substrate 12, periodical metal unit array 11 are arranged on 12 surface of medium substrate.
It should be understood that the periodical metal unit array 11 being arranged on medium substrate 12 can be located at monopole antenna 21
The same side of medium substrate 12, or the two sides of medium substrate are set, the present invention is without limitation.
Further, low RCS antenna provided in an embodiment of the present invention, periodical metal unit array 11 can be zigzag
The length of structure, sawtooth is gradually reduced along the bottom end of medium substrate to top, and periodical metal unit array 11 and monopole
Antenna 21 is located at the same side of medium substrate 12.
Obviously, the present invention to the structure of specific periodic cells array 11 with no restriction, be able to achieve such as strong-weak dispersion area
It is adjusted and controlled both.
In practice, above-mentioned low RCS structure can be used for coupling, conduct and radiate artificial surface by the way that coupling medium is arranged
Phasmon.And pass through the structure size for optimizing the coupling medium, in comprehensive regulation artificial surface phasmon dispersion curve
By force-weak dispersion area allows in weak dispersion area electromagnetic wave that is, by changing sawtooth height h along coupling medium high efficiency of transmission and spoke
It penetrates；And in strong dispersion area, electromagnetic wave is then strongly absorbed.
Therefore, low RCS antenna provided in an embodiment of the present invention inhales wave/diffusing structure, artificial surface etc. without additional load
Inherently there is good absorbing property from excimer coupling medium, by it directly as antenna radiator, guaranteeing efficient spoke
While penetrating performance, the outer RCS reduction of aerial band is realized, and still there is good RCS to reduce effect in larger incident angular domain.
Optionally, low RCS antenna provided in an embodiment of the present invention, periodical metal unit array 11 can be etched in medium
12 surface of substrate.
Optionally, low RCS antenna provided in an embodiment of the present invention, monopole antenna 21 can be printed monopole antenna.
In order to better understand and use low RCS antenna provided in an embodiment of the present invention, in the above-mentioned base that antenna has been determined
It, can be according to the specific actual size parameter for requiring to determine each structure after this structure.Including artificial surface phasmon coupling
Close dielectric constant, loss and the thickness of medium medium substrate, periodical metal unit structure form, size and fed monopole
Sub- position etc..
As shown in Figure 1, it is assumed that the dielectric substrate thickness of low RCS antenna is t, relative dielectric constant εr, loss angle tangent
For tan (δ).The periodicity metal unit array uses metal wrinkled surface, period p, and the metal facewidth is a, metal-toothed
A height of h, metal contact wires width is w in the x-direction.
In one embodiment of low RCS antenna provided by the invention, it is assumed that Antenna Operation has low in C-band in X-band
RCS characteristic.
Calculation optimization is carried out according to above-mentioned technical indicator, the final result that the embodiment of the present invention obtains is as follows: medium substrate
Thickness t=1mm, relative dielectric constant ε r=4.3, loss angle tangent tan (δ)=0.025, metal wrinkled surface period p=
0.5mm, metal facewidth a=0.25mm, the high h=5.2mm of metal-toothed, metal contact wires width w=0.2mm, feed are single in the x-direction
Extremely sub- length is 7.8mm, and periodical metal array is 2.5mm, metal wrinkled surface end metal at a distance from fed monopole
Tooth height makees gradual change processing, to realize that wave is inhaled in broadband.Overall antennas sizes are 25 × 25 × 31mm3。
Further, as shown in figure 3, the low RCS antenna is in 6.5~7.5GHz frequency range, S11Respectively less than -10dB, it is average to increase
Benefit is about 6.5dB.
As shown in figure 4, the low face RCS antenna E, the face H Direction Pattern Simulation and the test result are coincide substantially.
As shown in figure 5, the low RCS antenna within the scope of -20~+20 ° of X-band incidence angle, all has good RCS reduction
Effect.
As shown in fig. 6, the low RCS antenna, in same polarization electromagnetic wave vertical incidence, RCS reduction effect is obvious, and
Compared to metal plate, maximum reduced value is up to 35dB.
In conclusion low RCS antenna provided in an embodiment of the present invention, by the way that artificial surface phasmon coupling medium is arranged
And feed structure, artificial surface phasmon coupling medium are formed by the way that metal array is arranged on medium substrate, feed structure
Including earth plate and the monopole antenna being arranged on earth plate, and the setting of artificial surface phasmon coupling medium is being connect
On floor, and monopole antenna is located at the side of artificial surface phasmon coupling medium, so as to regulate and control artificial surface etc.
From strong-weak dispersion area in excimer dispersion curve, allow the antenna in weak dispersion area electromagnetic wave along coupling medium high efficiency of transmission
And it radiates；And in strong dispersion area, electromagnetic wave is then strongly absorbed, the antenna structure is simple, using printed-board technology processing,
It is at low cost, easily conformal, and under the premise of guaranteeing efficiently to transmit/receive performance, RCS reduction effect is obvious, even if in larger angular domain
All have good RCS reduction effect.
Disclosed above is only several specific embodiments of the invention, and still, the embodiment of the present invention is not limited to this, is appointed
What what those skilled in the art can think variation should all fall into protection scope of the present invention.
Claims (4)
1. a kind of low RCS antenna characterized by comprising artificial surface phasmon coupling medium (1) and feed structure (2),
The feed structure (2) includes monopole antenna (21) and earth plate (22), and monopole antenna (21) setting connects described
On floor (22)；The artificial surface phasmon coupling medium (1) is arranged on the earth plate (22), and the monopole
Antenna (21) is located at the side of the artificial surface phasmon coupling medium (1)；The artificial surface phasmon couples matchmaker
Matter (1) includes periodical metal unit array (11) and medium substrate (12), and the periodicity metal unit array (11) is arranged
On the medium substrate (12) surface.
2. low RCS antenna according to claim 1, which is characterized in that the periodicity metal unit array (11) is saw
The length of tooth-shape structure, sawtooth is gradually reduced along the bottom end of the medium substrate to top.
3. low RCS antenna according to claim 1, which is characterized in that the periodicity metal unit array (11) etches
In the medium substrate (12) surface.
4. low RCS antenna according to claim 1, which is characterized in that the monopole antenna (21) is printed monopole
Antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810821176.1A CN109037947B (en) | 2018-07-24 | 2018-07-24 | Low RCS antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810821176.1A CN109037947B (en) | 2018-07-24 | 2018-07-24 | Low RCS antenna |
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| Publication Number | Publication Date |
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| CN109037947A true CN109037947A (en) | 2018-12-18 |
| CN109037947B CN109037947B (en) | 2021-10-22 |
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| CN201810821176.1A Active CN109037947B (en) | 2018-07-24 | 2018-07-24 | Low RCS antenna |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109768384A (en) * | 2019-01-23 | 2019-05-17 | 西安电子科技大学 | Based on odd mould artificial surface phasmon broadband end-on-fire antenna, wireless communication system |
| CN109888484A (en) * | 2019-01-30 | 2019-06-14 | 上海交通大学 | High efficiency end-on-fire antenna based on SSPPs structure |
| CN110034396A (en) * | 2019-03-29 | 2019-07-19 | 上海交通大学 | Vertical depolarized omnidirectional antenna based on artificial surface phasmon structure |
| CN111883932A (en) * | 2020-08-10 | 2020-11-03 | 西安电子科技大学 | Low radar scattering cross section reflective array antenna based on artificial surface plasmon |
| CN114843765A (en) * | 2022-05-26 | 2022-08-02 | 中国人民解放军空军工程大学 | Radiation scattering integrated broadband antenna |
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| US20120019901A1 (en) * | 2010-07-23 | 2012-01-26 | Pinaki Mazumder | Dynamic Terahertz Switch Using Periodic Corrugated Structures |
| US8208191B2 (en) * | 2008-10-30 | 2012-06-26 | Leigh University | Ultra-wide band slow light structure using plasmonic graded grating structures |
| CN106602231A (en) * | 2016-11-16 | 2017-04-26 | 中国人民解放军空军工程大学 | Quasi-surface plasmon ultra-wide band low-scattering slot antenna |
| CN107302134A (en) * | 2017-07-27 | 2017-10-27 | 南京信息工程大学 | A kind of end-on-fire antenna based on artificial surface phasmon |
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| US8208191B2 (en) * | 2008-10-30 | 2012-06-26 | Leigh University | Ultra-wide band slow light structure using plasmonic graded grating structures |
| US20120019901A1 (en) * | 2010-07-23 | 2012-01-26 | Pinaki Mazumder | Dynamic Terahertz Switch Using Periodic Corrugated Structures |
| CN106602231A (en) * | 2016-11-16 | 2017-04-26 | 中国人民解放军空军工程大学 | Quasi-surface plasmon ultra-wide band low-scattering slot antenna |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109768384A (en) * | 2019-01-23 | 2019-05-17 | 西安电子科技大学 | Based on odd mould artificial surface phasmon broadband end-on-fire antenna, wireless communication system |
| CN109768384B (en) * | 2019-01-23 | 2020-10-16 | 西安电子科技大学 | Odd-mode artificial surface plasmon based broadband end-fire antenna and wireless communication system |
| CN109888484A (en) * | 2019-01-30 | 2019-06-14 | 上海交通大学 | High efficiency end-on-fire antenna based on SSPPs structure |
| CN109888484B (en) * | 2019-01-30 | 2020-09-04 | 上海交通大学 | High-efficiency end-fire antenna based on SSPPs structure |
| CN110034396A (en) * | 2019-03-29 | 2019-07-19 | 上海交通大学 | Vertical depolarized omnidirectional antenna based on artificial surface phasmon structure |
| CN111883932A (en) * | 2020-08-10 | 2020-11-03 | 西安电子科技大学 | Low radar scattering cross section reflective array antenna based on artificial surface plasmon |
| CN114843765A (en) * | 2022-05-26 | 2022-08-02 | 中国人民解放军空军工程大学 | Radiation scattering integrated broadband antenna |
| CN114843765B (en) * | 2022-05-26 | 2023-09-08 | 中国人民解放军空军工程大学 | Radiation scattering integrated broadband antenna |
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| CN109037947B (en) | 2021-10-22 |
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