CN104993247A - Anisotropy dual-polarization illusion and stealthy artificial electromagnetic surface - Google Patents
Anisotropy dual-polarization illusion and stealthy artificial electromagnetic surface Download PDFInfo
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- CN104993247A CN104993247A CN201510293939.6A CN201510293939A CN104993247A CN 104993247 A CN104993247 A CN 104993247A CN 201510293939 A CN201510293939 A CN 201510293939A CN 104993247 A CN104993247 A CN 104993247A
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Abstract
An anisotropy dual-polarization illusion and stealthy artificial electromagnetic surface is composed of a plurality of pairs of structural units arranged in mirror symmetry regularly on a sub-wavelength scale. Each structural unit is composed of two H-shaped structures orthometric to each other adhered on the upper surface of a medium substrate. When incoming waves are TE polarization (namely, the electric field direction is in the axial direction of a cylinder) planar waves, a metal cylinder scatter field wrapping the artificial electromagnetic surface is similar to an ideal medium cylinder of an identical size and with a relative dielectric constant of 5. Besides, when the incoming waves are TM polarization (namely, the magnetic field direction is in the axial direction), compared with the metal cylinder with the identical size, the metal cylinder scatter field wrapping the artificial electromagnetic surface is reduced in both the front and rear directions.
Description
Technical field
The present invention relates to and a kind ofly work in the anisotropy dual polarization illusion of microwave frequency band and stealthy artificial resistance electromagnetic surface, belong to novel artificial electromagnetic device applications.
Background technology
Artificial electromagnetic surface is a kind of special representing form of novel artificial electromagnetic device, is also in recent years about a current research developing direction and the study hotspot of novel artificial electromagnetic device.Novel artificial electromagnetic device is defined in area of space usually, and when this area of space is defined as smooth surface or interface, novel artificial electromagnetic device just develops into artificial electromagnetic surface.Artificial electromagnetic surface is a kind of ultra-thin two-dimension array plane, and its construction unit is made up of common novel artificial electromagnetic device construction unit, can realize reflection of electromagnetic wave and transmission, the regulation and control flexibly and effectively of the characteristics such as electromagnetic wave phase place, polarization mode, communication mode.Because the thickness on artificial electromagnetic surface is very little compared with wavelength, can be considered unlimited thin structure, so the proposition of artificial electromagnetic surface concept, substantially reduce the volume of novel artificial electromagnetic device, make novel artificial electromagnetic device be provided with application prospect more widely, promote the research and development of novel artificial electromagnetic device.Utilize artificial electromagnetic surface device can realize negative refraction, negative reflection, polarized rotation, pool picture, complicated wave beam, propagating wave to novel physics effects such as surface wave conversions.Enrich unique physical characteristic and make artificial electromagnetic surface have important application prospect at stealth technology, antenna technology, microwave and the numerous areas such as THz devices, opto-electronic device to electromagnetic flexible modulation ability.
Summary of the invention
Technical problem: the object of the invention is to design a kind of anisotropy dual polarization illusion and stealthy artificial resistance electromagnetic surface, solve the present situation that in prior art, isotropism artificial electromagnetic surface texture only can work to a kind of in-field of polarised direction.
Technical scheme: the basic structural unit of a kind of anisotropy dual polarization illusion of the present invention and stealthy artificial resistance electromagnetic surface is a kind of anisotropic structure, described basic structural unit is included in medium substrate upper surface and is provided with two orthogonal " work " character form structures; By the multiple basic structural units on sub-wavelength dimensions between two specular regularly arranged form anisotropy artificial electromagnetic surface, designed anisotropy artificial electromagnetic surface is wrapped in around metal cylinder, and is filled with the perfect medium that relative dielectric constant is 12 between artificial electromagnetic surface and metal cylinder.
Described anisotropy dual polarization illusion and stealthy artificial resistance electromagnetic surface, incident wave be TE polarization, direction of an electric field be cylinder axis to plane wave time, the relative dielectric constant of the metal cylinder scattered field and same size that wrap up this artificial electromagnetic surface be 5 perfect medium cylinder similar, and be TM polarization at incident wave, magnetic direction be cylinder axis to plane wave time, wrap up the metal cylinder scattered field on this artificial electromagnetic surface compared with the metal cylinder of same size, front backscattering enhanced all reduces.
Beneficial effect: the present invention adopts two orthogonal " work " character form structures as the basic structure of this anisotropy dual polarization illusion and stealthy artificial resistance electromagnetic surface.Orthogonal " work " character form structure can produce enough electroresponses to the incident wave that TM polarization and TE polarize, and the electroresponse produced regulates and controls cylindrical scattered field.The effect of magnetic response to structure that designed structure is introduced simultaneously serves beneficial effect.
Compared with prior art, advantage of the present invention:
1. structure of the present invention is simple, is easy to processing
2. thickness of the present invention is very little, is easy to conformal
3. the present invention can show the electromagnetic property of illusion device and stealthy device respectively to not like-polarized incident wave.
Accompanying drawing explanation
Fig. 1 is cellular construction and scale diagrams;
Fig. 2 is designed anisotropy artificial electromagnetic schematic surface;
Fig. 3 is the metal cylinder sample schematic diagram on parcel artificial electromagnetic surface;
When Fig. 4 is incident wave TE polarization: (a) relative dielectric constant is the dielectric cylinder near field electric-field intensity distribution of 5; The metal cylinder near field electric-field intensity distribution on (b) parcel artificial electromagnetic surface;
The normalization Bistatic RCS of the metal cylinder on dielectric cylinder and parcel artificial electromagnetic surface when Fig. 5 is incident wave TE polarization;
The normalization Bistatic RCS of the metal cylinder on metal cylinder and parcel artificial electromagnetic surface when Fig. 6 is incident wave TM polarization.
Reference numeral:
1-metal structure; 2-medium substrate; 3-filled media; 4-metal cylinder.
Embodiment
The basic structural unit of anisotropy dual polarization illusion of the present invention and stealthy artificial resistance electromagnetic surface is a kind of anisotropic structure, and described basic structural unit is included in medium substrate 2 (polyimide film) upper surface and is provided with two orthogonal " work " character form structures; By the multiple basic structural units on sub-wavelength dimensions between two specular regularly arranged form anisotropy artificial electromagnetic surface, designed anisotropy artificial electromagnetic surface is wrapped in around metal cylinder 4, and is filled with the perfect medium 3 that relative dielectric constant is 12 between artificial electromagnetic surface and metal cylinder 4.
We have ignored magnetic response in the design process, and the artificial electromagnetic surface magnetoimpedance designed by supposing is zero.The present invention selects two orthogonal " work " character form structures as basic electric resonance cellular construction, and utilizes the surface electrical impedance computing formula on artificial electromagnetic surface to determine the size of two " work " character form structures.Subsequently designed construction unit is imported electromagnetic simulation software and carry out full-wave simulation, whether the artificial electromagnetic surface designed by being observed by the near field distribution and far field Bistatic RCS simulating its electric field strength is met design requirement.Through optimizing and parameter scanning, finally obtain artificial electromagnetic surface cell structure as shown in Figure 1, in figure, institute's marking structure size is as follows: L1=22mm, L2=17.2mm, L3=8.9mm, L4=11.4354mm, L5=0.6mm, L6=L7=L8=1mm, L9=8.8mm.Fig. 2 is the anisotropy artificial electromagnetic schematic surface be made up of cellular construction as shown in Figure 1.Designed metal unit structure processing is about on the polyimide film of 0.08mm in a layer thickness, and this film is flexible material, is convenient to the conformal of artificial electromagnetic surface.Fig. 3 is the metal cylinder schematic diagram on the designed artificial electromagnetic surface of parcel.This devices function is in 2GHz, and its radius is 0.1 wavelength, is about 15mm.Resistance electromagnetic surface shown in Fig. 2 is wrapped on metal cylinder, just forms the dual polarization " illusion " designed by us and " stealthy " device.The perfect medium that relative dielectric constant is 12 is filled with between designed anisotropy artificial electromagnetic surface and metal cylinder.Fig. 4 and near field electric-field intensity distribution figure when Figure 5 shows that incident plane wave TE polarizes and corresponding normalization dual station RCS curve.When to be respectively frequency shown in Fig. 4 (a) He Fig. 4 (b) be 2GHz, plane wave incidence relative dielectric constant is the perfect medium cylinder of 5 and the electric-field intensity distribution of metal cylinder.Figure 5 shows that the contrast of the Bistatic RCS of the metal cylinder on dielectric cylinder and parcel artificial electromagnetic surface.The result of Fig. 4 and Fig. 5 has absolutely proved that the outer artificial electromagnetic surface of wrapping up of metal cylinder is " illusion " material when in-field TE polarize, and its disguised oneself as by metal cylinder relative dielectric constant of same size is the dielectric cylinder of 5.Figure 5 shows that the corresponding normalization dual station Bistatic RCS curve of metal cylinder and the metal cylinder on the parcel artificial electromagnetic surface of same size.Fig. 5 result shows, designed artificial electromagnetic surface reduces the possibility that metal cylinder is detected on plane wave propagation direction, and the outer artificial electromagnetic surface of wrapping up of metal cylinder is " stealthy " material.
Claims (2)
1. an anisotropy dual polarization illusion and stealthy artificial resistance electromagnetic surface, it is characterized in that the basic structural unit on this artificial electromagnetic surface is a kind of anisotropic structure, described basic structural unit is included in medium substrate (2) upper surface and is provided with two orthogonal " work " character form structures; By the multiple basic structural units on sub-wavelength dimensions between two specular regularly arranged form anisotropy artificial electromagnetic surface, designed anisotropy artificial electromagnetic surface is wrapped in metal cylinder (4) around, and is filled with the perfect medium (3) that relative dielectric constant is 12 between artificial electromagnetic surface and metal cylinder (4).
2. as claim 1 anisotropy dual polarization illusion and stealthy artificial resistance electromagnetic surface, it is characterized in that described anisotropy dual polarization illusion and stealthy artificial resistance electromagnetic surface, incident wave be TE polarization, namely direction of an electric field be cylinder axis to plane wave time, the relative dielectric constant of the metal cylinder scattered field and same size that wrap up this artificial electromagnetic surface be 5 perfect medium cylinder similar, and be TM polarization at incident wave, namely magnetic direction be cylinder axis to plane wave time, wrap up the metal cylinder scattered field on this artificial electromagnetic surface compared with the metal cylinder of same size, front backscattering enhanced all reduces.
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| CN201510293939.6A CN104993247A (en) | 2015-06-01 | 2015-06-01 | Anisotropy dual-polarization illusion and stealthy artificial electromagnetic surface |
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| CN201510293939.6A CN104993247A (en) | 2015-06-01 | 2015-06-01 | Anisotropy dual-polarization illusion and stealthy artificial electromagnetic surface |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106852101A (en) * | 2016-12-30 | 2017-06-13 | 浙江大学 | A kind of method for designing of the stealthy cover of broadband magnetic |
| CN109037956A (en) * | 2018-06-07 | 2018-12-18 | 西安电子科技大学 | A kind of super surface system of radar invisible with wave beam aggregation feature, radar |
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| US4086661A (en) * | 1974-03-14 | 1978-04-25 | Fujitsu Limited | Cylindrical magnetic domain element |
| CN103490171A (en) * | 2013-10-15 | 2014-01-01 | 西安电子科技大学 | Composite wave-absorbing material with wide frequency bands |
| CN103985924A (en) * | 2014-05-22 | 2014-08-13 | 东南大学 | Reflection-type polarization separator |
| CN104076924A (en) * | 2014-06-28 | 2014-10-01 | 西安电子科技大学 | Combined electromagnetic cloaking device |
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2015
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Patent Citations (4)
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|---|---|---|---|---|
| US4086661A (en) * | 1974-03-14 | 1978-04-25 | Fujitsu Limited | Cylindrical magnetic domain element |
| CN103490171A (en) * | 2013-10-15 | 2014-01-01 | 西安电子科技大学 | Composite wave-absorbing material with wide frequency bands |
| CN103985924A (en) * | 2014-05-22 | 2014-08-13 | 东南大学 | Reflection-type polarization separator |
| CN104076924A (en) * | 2014-06-28 | 2014-10-01 | 西安电子科技大学 | Combined electromagnetic cloaking device |
Non-Patent Citations (3)
| Title |
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| A. MONTI: "Mantle cloak devices for TE and TM polarizations", 《IEEE ANTENNA AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM》 * |
| ALESSIO MONTI: "Anisotropic Mantle Cloaks for TM and TE Scattering Reduction", 《IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION》 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106852101A (en) * | 2016-12-30 | 2017-06-13 | 浙江大学 | A kind of method for designing of the stealthy cover of broadband magnetic |
| CN109037956A (en) * | 2018-06-07 | 2018-12-18 | 西安电子科技大学 | A kind of super surface system of radar invisible with wave beam aggregation feature, radar |
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Application publication date: 20151021 |