CN105043168A - Three-dimensional stealth device using electromagnetic waves - Google Patents
Three-dimensional stealth device using electromagnetic waves Download PDFInfo
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Abstract
The invention discloses a three-dimensional stealth device using electromagnetic waves.The three-dimensional stealth device is a cube with a cavity composed of medium units in three kinds, namely, eight first medium units, eight second medium units and twelve third medium units. The refractive index of each first medium unit is smaller than that of each third medium unit and is greater than that of each second medium unit. Each first medium unit is a heptahedron. Each second medium unit is a tetrahedron. Each third medium unit is a tetrahedron.The cube for enclosing a stealth region is formed by the medium units in three kinds.When electromagnetic waves are vertically incident to the three-dimensional stealth device, the electromagnetic waves bypass the cavity in the middle by controlling propagation of electromagnetic waves through refraction and the direction of emergent electromagnetic waves is the same as that of conventional incident electromagnetic waves.The three-dimensional stealth device using electromagnetic waves helps to keep an object stealthy in a three-dimensional range and has stealth effect in six directions.
Description
Technical field
The present invention relates to the stealthy device of a kind of 3 D electromagnetic ripple, belong to the stealthy field of electromagnetic wave.
Background technology
Stealthy be that mankind's one is for a long time desirable always, but stealth technology never realizes for a long time.When on electromagnetic wave incident to object, to reflect, scattering at body surface, the luminous energy scattered out has been received, and object will " profiling ".Existing stealth technique, such as the stealth technology that stealth aircraft etc. adopts, mainly in microwave section, smearing the material of energy absorbing radar wave at body surface, by absorbing the specific wavelength of its correspondence, thus reaching the effect that cannot detect, but this technology is not real stealthy, and can only to single base station radar invisible, and can not be stealthy to bistatic radar, be therefore easy to just be found by bistatic radar.In optical band, the main or military camouflage color of existing stealth technology etc., but this is just a kind of camouflage instead of real disappearing also from sight line.There is the stealthy device utilizing anisotropic media to make in the last few years, anisotropic media is utilized to control electromagnetic track, thus make electromagnetic wave walk around by stealthy object, but, the stealthy device utilizing anisotropic media to make of current realization, it is electromagnetic stealthy that major part can only realize particular polarization, and can only carry out stealthy to object at two-dimentional yardstick, can not carry out stealthy at three dimension scale to object.
Summary of the invention
The object of the present invention is to provide the stealthy device of a kind of 3 D electromagnetic ripple, it can realize stealthy to electromagnetic wave at three dimension scale.
To achieve these goals, the technical solution adopted in the present invention is: the cube closed in its to be the centre surrounded by eight first medium unit, eight second medium unit and 12 the 3rd media units be stealthy region, the refractive index of described 3rd media units is greater than the refractive index of first medium unit, and the refractive index of first medium unit is greater than the refractive index of second medium unit;
Described each first medium unit is the heptahedron formed after a cube has lacked a positive triangular pyramid, this cubical rib is long is l, l > 0, the summit of this positive triangular pyramid is this cubical summit, three ribs that three inclines of this positive triangular pyramid are these cubical three is accordingly intersection point with this summit, the cut surface that this cube obtains after lacking this positive triangular pyramid is equilateral triangle, and the length of side of this equilateral triangle is
three first sides in isosceles right triangle shape of each first medium unit overlap completely from first side of different first medium unit respectively;
Described each second medium unit is positive Rhizoma Sparganii taper, and the rib length of the incline of each second medium unit is
wherein, 0<a<1/3, the isosceles triangle to be drift angle be in the side of each second medium unit obtuse angle; The bottom surface of each second medium unit overlaps completely with the cut surface of a first medium unit respectively;
Described each 3rd media units is the tetrahedron be made up of two first side and two the second sides, first side and the second side are all in isosceles triangle shape, wherein, the drift angle of the first side is obtuse angle, the drift angle of the second side is acute angle, the connecting line on the summit of two the first sides is the base of two the second sides, and the connecting line on the summit of two the second sides is the base of two the first sides; Each first side of each the 3rd media units overlaps completely with a side of a second medium unit respectively; The length on the base of the second side is 2al, and wherein, 0<a<1/3, each second side of each the 3rd media units is the wall in described stealthy region.
Further, the refractive index of each media units of the present invention meets following formula relation:
Wherein, 0<a≤b<1/3; n
1represent the refractive index of first medium unit, n
2represent the refractive index of second medium unit, n
3represent the refractive index of the 3rd media units.
Further, when using of the present invention, electromagnetic wave is by the outer surface vertical incidence of described stealthy device.
The invention has the beneficial effects as follows:
The present invention is to have the first medium unit of different refractivity, second medium unit and the 3rd media units are as the material constructing stealthy device, when electromagnetic wave is by this device, the refraction utilizing the interface of the different refractivity of each media units to occur is to control electromagnetic wave propagation track, electromagnetic wave is made to occur repeatedly offset and walk around stealthy region, thus make to be incident in the electromagnetic wave of this stealthy device and outgoing in this stealthy device electromagnetic wave point-blank, obtain a kind of simple structure, be easy to realize, stable performance, there is the stealthy device stealthy to the electromagnetic wave of the arbitrary surface direction incidence perpendicular to this stealthy device.The present invention is by first medium unit, second medium unit and the 3rd media units material as this stealthy device of structure, do not need to utilize metal pattern, and the material that occurring in nature only need be utilized easily to obtain realizes, do not need higher technique, be easy to realize; The stealthy device of the present invention has six direction stealth effect, stable performance, and can realize stealthy to object to complete polarization electromagnetic wave at three dimension scale.
Accompanying drawing explanation
Fig. 1 is a kind of forming process schematic diagram of first medium unit of the present invention, and wherein, (a) is the schematic diagram of first medium unit in cubic before being cut by positive triangular pyramid, and (b) is the schematic diagram of the positive triangular pyramid cut away; C () is the schematic diagram of the first medium unit obtained after being cut by the positive triangular pyramid shown in (b) from the cube shown in (a);
Fig. 2 is the schematic diagram of second medium unit;
Fig. 3 is the schematic diagram of the 3rd media units;
Fig. 4 be the present invention by eight first medium unit splicings together after structural representation;
Fig. 5 is the structural representation in the stealthy region of the stealthy device of the present invention;
Fig. 6 is the overall structure schematic diagram of the present invention after eight first medium unit, eight second medium unit and 12 the 3rd media units being bolted together;
Fig. 7 light is normally incident in an outer surface of the present invention the light path schematic diagram connecing inside and outside two zoness of different of square;
Fig. 8 be the incidence point y of incident ray oy drop on the stealthy device of the present invention an outer surface in connect in square and in an outer surface that the incidence point w of light uw drops on the stealthy device of the present invention, connect the schematic diagram outside square.
In figure,
First side of first medium unit: △ Qnm, △ Onj, △ Tnk, △ Rnl, △ Bij, △ Eli, △ Gki, △ Dmi, △ Jjl, △ Mlk, △ Lmk, △ Imj;
Second side of first medium unit: square NOnQ, square QnTS, square PRnO, square RUTn, square UMkT, square STkL, square HGkM, square GFLk, square NOjI, square OPJj, square BjJC, square AIjB, square NImQ, square QmLS, square DFLm, square IADm, square PJlR, square RlMU, square EHMl, square JCEl, square ABiD, square DiGF, square EHGi, square BCEi,
3rd side (i.e. cut surface) of first medium unit: △ njm, △ nmk, △ njl, △ nlk, △ jmi, △ mki, △ lki, △ jli;
The bottom surface of second medium unit: △ njm, △ nmk, △ njl, △ nlk, △ jmi, △ mki, △ lki, △ jli;
The side of second medium unit: △ nja, △ nma, △ ajm, △ jnb, △ bnl, △ blj, △ mnc, △ mkc, △ cnk, △ nld, △ ndk, △ dkl, △ mej, △ mei, △ ije, △ jfl, △ fli, △ jfi, △ mkg, △ kgi, △ mgi, △ lkh, △ khi, △ lhi;
First side of the 3rd media units: △ nja, △ nma, △ ajm, △ jnb, △ bnl, △ blj, △ mnc, △ mkc, △ cnk, △ nld, △ ndk, △ dkl, △ mej, △ mei, △ ije, △ jfl, △ fli, △ jfi, △ mkg, △ kgi, △ mgi, △ lkh, △ khi, △ lhi;
Second side of the 3rd media units: △ abn, △ abj, △ jfe, △ ife, △ bfj, △ bfl, △ aem, △ aej, △ acm, △ acn, △ bdn, △ bdl, △ cdn, △ cdk, △ cgm, △ cgk, △ dhk, △ dhl, △ egm, △ egi, △ fhl, △ fhi, △ ghk, △ ghi.
Detailed description of the invention
In the present invention, first medium unit is heptahedron shape.For ease of understanding the shape of first medium unit, Fig. 1 (a) to Fig. 1 (c) is utilized to show a kind of forming process of first medium unit, namely first medium unit 3 of the present invention can be obtained after a cube 1 is cut away a positive triangular pyramid 2, wherein, the rib of cube 1 is long is l, l > 0.Be described in detail with a concrete example below.Composition graphs 1 (a) is known with Fig. 1 (b), the summit (K) of positive triangular pyramid 2 is a summit (K) of cube 1 accordingly, and three inclines (Kj, Km, Ki) of positive triangular pyramid 2 are the rib (Kj, Km, Ki) that three of cube 1 are intersection point with the summit of cube 1 (K) accordingly.As shown in Fig. 1 (c), the remainder cut away from cube 1 after positive triangular pyramid 2 is first medium unit of the present invention.Cube 1 is heptahedron shape because lacking positive triangular pyramid 2, and thus first medium unit of the present invention is heptahedron shape.Cut away positive triangular pyramid 2 from cube 1 after, obtain a cut surface △ imj.This cut surface △ imj is equilateral triangle shape, is called the 3rd side of first medium unit, and it is also the bottom surface △ imj of positive triangular pyramid 2 accordingly, and its length of side is
and former three square sides KiBj of cube 1, KiDm, KjIm be because cut positive triangular pyramid 2, residue obtains three equal isosceles right triangle sides (△ jBi, △ mDi, △ Ijm) respectively, referred to as the first side of first medium unit; Be not cut three equal square sides (square IADm, square AIjB, square ABiD) of cube 1 are then called the second side of first medium unit.
Second medium unit is positive Rhizoma Sparganii taper, and as shown in Figure 2, the summit of this positive triangular pyramid is e, and the rib length of three inclines (ej, em, ei) is
wherein, 0<a<1/3; The isosceles triangle to be drift angle be in three sides (△ emj, △ emi, △ eji) of second medium unit obtuse angle; The bottom surface △ jmi of second medium unit is equilateral triangle, and the length of side of bottom surface △ jmi is
As shown in Figure 3,3rd media units is tetrahedral, and the isosceles triangle (△ fji, △ eji) that its four sides are respectively two equal and opposite in directions, drift angle that shape is identical is obtuse angle and two equal and opposite in directions, the drift angle that shape is identical are the isosceles triangle (△ fej, △ fei) of acute angle.Wherein, drift angle is the first side that the isosceles triangle (△ fji, △ eji) at obtuse angle is called the 3rd media units, and drift angle is the second side that the isosceles triangle (△ fej, △ fei) of acute angle is called the 3rd media units.The base ji of two the first sides (△ fji, △ eji) overlaps, and the length of base ji is
the base fe of two the second sides (△ fej, △ fei) overlaps, and the length of base fe is 2al, wherein, and 0<a<1/3; The waist ej of △ fej overlaps with the waist ej of △ eji, and the waist fj of △ fej overlaps with the waist fj of △ fji, and the waist fi of △ fei overlaps with the waist fi of △ fji, and the waist ei of △ fei overlaps with the waist ei of △ eji.Wherein, the length of waist of the first side △ fji and △ eji of the 3rd media units and the rib appearance etc. of the incline of second medium unit, be
Below in conjunction with Fig. 4 and Fig. 6, describe the assembling process of the stealthy device of the present invention in detail with concrete example.
First, can carry out assembled according to the mode shown in Fig. 4 by eight first medium unit, three the first sides by each first medium unit coincide together completely from first side of different first medium unit respectively.Specifically, three of first first medium unit the first side △ Qnm, △ Onj, △ Ijm are overlapped with the first side △ Ijm of the first side △ Qnm of second first medium unit, the first side △ Onj of the 3rd first medium unit, the 5th first medium unit respectively accordingly completely; Similarly, three of second first medium unit the first side △ Qnm, △ Tnk, △ Lmk are overlapped with the first side △ Lmk of the first side △ Qnm of the first first medium unit, the first side △ Tnk of the 4th first medium unit, the 6th first medium unit respectively accordingly completely; Three the first side △ Onj, △ Jjl of the 3rd first medium unit, △ Rnl are overlapped with the first side △ Rnl of the first side △ Onj of first first medium unit, the first side △ Jjl of the 7th first medium unit, the 4th first medium unit respectively accordingly completely; Three the first side △ Tnk, △ Rnl of the 4th first medium unit, △ Mkl are overlapped with the first side △ Mkl of the first side △ Tnk of second first medium unit, the first side △ Rnl of the 3rd first medium unit, the 8th first medium unit respectively accordingly completely; Three the first side △ Imj, △ Bji of the 5th first medium unit, △ Dim are overlapped with the first side △ Dim of the first side △ Imj of first first medium unit, the first side △ Bji of the 7th first medium unit, the 6th first medium unit respectively accordingly completely; Three the first side △ Lmk, △ miD of the 6th first medium unit, △ Gki are overlapped with the first side △ Gki of the first side △ Lmk of second first medium unit, the first side △ miD of the 5th first medium unit, the 8th first medium unit respectively accordingly completely; Three the first side △ Jjl, △ Bji of the 7th first medium unit, △ Eli are overlapped with the first side △ Eli of the first side △ Jjl of the 3rd first medium unit, the first side △ Bji of the 5th first medium unit, the 8th first medium unit respectively accordingly completely; Three the first side △ Mlk, △ Gki of the 8th first medium unit, △ Eli are overlapped with the first side △ Eli of the first side △ Mlk of the 4th first medium unit, the first side △ Gki of the 6th first medium unit, the 7th first medium unit respectively accordingly completely.
See Fig. 6, further, the bottom surface of each second medium unit overlaps completely with the cut surface of a first medium unit respectively.Specifically, the 3rd side △ njm of first first medium unit is overlapped completely with the bottom surface △ njm of first second medium unit; 3rd side △ nmk of second first medium unit overlaps completely with the bottom surface △ nmk of second second medium unit; 3rd side △ njl of the 3rd first medium unit overlaps completely with the bottom surface △ njl of the 3rd second medium unit; 3rd side △ nlk of the 4th first medium unit overlaps completely with the bottom surface △ nlk of the 4th second medium unit; 3rd side △ jmi of the 5th first medium unit overlaps completely with the bottom surface △ jmi of the 5th second medium unit; 3rd side △ mki of the 6th first medium unit overlaps completely with the bottom surface △ mki of the 6th second medium unit; 3rd side △ jli of the 7th first medium unit overlaps completely with the bottom surface △ jli of the 7th second medium unit; 3rd side △ lki of the 8th first medium unit overlaps completely with the bottom surface △ lki of the 8th second medium unit.
Further, the side of each second medium unit overlaps completely with the first side of the 3rd media units respectively.Specifically, three of first second medium unit side △ amn, △ ajn, △ ajm are overlapped with the first side △ ajn of the first side △ amn of first the 3rd media units, second the 3rd media units, the first side △ ajm of the 9th the 3rd media units respectively accordingly completely; Similarly, three of second second medium unit side △ cmn, △ cnk, △ cmk are overlapped with the first side △ cnk of the first side △ cmn of first the 3rd media units, the 3rd the 3rd media units, the first side △ cmk of the tenth the 3rd media units respectively accordingly completely; Three side △ bnj, △ bnl of the 3rd second medium unit, △ bjl are overlapped with the first side △ bjl of the first side △ bnj, the first side △ bnl of the 4th the 3rd media units of second the 3rd media units, the 11 the 3rd media units respectively accordingly completely; Three side △ dnl, △ dnk of the 4th second medium unit, △ dlk are overlapped with the first side △ dlk of the first side △ dnl, the first side △ dnk of the 3rd the 3rd media units of the 4th the 3rd media units, the 12 the 3rd media units respectively accordingly completely; Three side △ emi, △ eji of the 5th second medium unit, △ ejm are overlapped with the first side △ eji of the first side △ emi of the 5th the 3rd media units, the 6th the 3rd media units, the first side △ ejm of the 9th the 3rd media units respectively accordingly completely; Three side △ gim, △ gik of the 6th second medium unit, △ gmk are overlapped with the first side △ gik of the first side △ gim of the 5th the 3rd media units, the 7th the 3rd media units, the first side △ gmk of the tenth the 3rd media units respectively accordingly completely; Three side △ fij, △ fil of the 7th second medium unit, △ flj are overlapped with the first side △ flj of the first side △ fij, the first side △ fil of the 8th the 3rd media units of the 6th the 3rd media units, the 11 the 3rd media units respectively accordingly completely; Three side △ hil, △ hik of the 8th second medium unit, △ hkl are overlapped with the first side △ hkl of the first side △ hil, the first side △ hik of the 7th the 3rd media units of the 8th the 3rd media units, the 12 the 3rd media units respectively accordingly completely.
So far, the stealthy device of the present invention defined as shown in Figure 6 is assembled.
In summary, the stealthy device of the present invention is by eight first medium unit, eight second medium unit and 12 the 3rd media units are formed, wherein, first side (△ Qnm) of the first medium unit (heptahedron QSTnmkL) that first side (△ Qnm) of first medium unit (heptahedron NQOnjmI) is adjacent overlaps completely, in like manner, the first side (△ Onj of remaining first medium unit, △ Tnk, △ Rnl, △ Bij, △ Eli, △ Gki, △ Dmi, △ Jjl, △ Mlk, △ Lmk, △ Imj) respectively from the first side (△ Qnm of different adjacent first medium unit, △ Onj, △ Tnk, △ Rnl, △ Bij, △ Eli, △ Gki, △ Dmi, △ Jjl, △ Mlk, △ Lmk, △ Imj) overlap completely, 3rd side (△ njm) of first medium unit (heptahedron NQOnjmI) overlaps with first side (△ njm) of second medium unit (positive triangular pyramid njma), in like manner, the 3rd side (△ nmk of remaining first medium unit, △ jnl, △ nlk, △ jmi, △ mki, △ lki, △ jli) respectively accordingly with bottom surface (the △ nmk of adjacent second medium unit, △ jnl, △ nlk, △ jmi, △ mki, △ lki, △ jli) overlap, the side (△ nja) of second medium unit (positive triangular pyramid njma) overlaps with first side (△ nja) of the 3rd media units (tetrahedron njab), in like manner, each side (△ nma of all the other each second medium unit, △ ajm, △ jnb, △ bnl, △ blj, △ mnc, △ mkc, △ cnk, △ nld, △ ndk, △ dkl, △ mej, △ mei, △ ije, △ jfl, △ fli, △ jfi, △ mkg, △ kgi, △ mgi, △ lkh, △ khi, △ lhi) respectively accordingly with the first side (△ nma of the 3rd adjacent media units, △ ajm, △ jnb, △ bnl, △ blj, △ mnc, △ mkc, △ cnk, △ nld, △ ndk, △ dkl, △ mej, △ mei, △ ije, △ jfl, △ fli, △ jfi, △ mkg, △ kgi, △ mgi, △ lkh, △ khi, △ lhi) overlap completely.It should be noted that, in the present invention, by the method for bonding, corresponding side can be coincided together.Visible, eight first medium unit, eight second medium unit and 12 the 3rd media units define the middle cube closed for cavity (i.e. stealthy region) jointly, thus constitute stealthy device of the present invention.Wherein, as shown in Figure 5, it is the space closed surrounded by the second side of the 3rd media units to the shape in stealthy region, and each second side of each the 3rd media units is the wall in this stealthy region; Second side of eight first medium unit then forms the outer surface of the stealthy device of the present invention jointly.
For the present invention, for visible ray, any outer surface perpendicular to the stealthy device of the present invention incides the light of stealthy device, its incidence point or drop on stealthy device arbitrary outer wall in connect in square, or to connect outside square in the arbitrary outer wall dropping on stealthy device.Below in conjunction with Fig. 7 and Fig. 8, be specifically described the trajectory diagram of these two kinds of light to this stealthy device for light oy and uv that penetrate corresponding from above-mentioned two kinds of different condition of incidence respectively.Wherein, connect in square QORT in the outer surface SUPN that the incidence point y of incident ray oy drops on stealthy device, connect outside square QORT in the outer surface SUPN that the incidence point w of incident ray uw drops on stealthy device.
As everyone knows, when light is to the interface of two different objects, can reflect, the direction of refraction is relevant with the refractive index of two media with the angle of light, namely follows Snell's law n
1sin θ
1=n
2sin θ
2, wherein n
1and n
2be respectively the refractive index of incidence wave and refracted wave place medium, θ
1and θ
2be respectively electromagnetic incidence angle and refraction angle.Comparatively speaking, the refractive index of interface both sides medium is larger, and light is larger relative to the skew occurred during incidence when this interface outgoing.
In the present invention, the refractive index of the 3rd media units is greater than the refractive index of first medium unit, and the refractive index of first medium unit is greater than the refractive index of second medium unit.Further, the refractive index of first medium unit, second medium unit and the 3rd media units follows following formula:
Wherein, 0<a≤b<1/3
Wherein, n
1represent the refractive index of described first medium unit, n
2represent the refractive index of described second medium unit, n
3represent the refractive index of described 3rd media units.
As shown in Figure 7, from the light oy that the second side (square RUTn) perpendicular to first medium unit (heptahedron nRTUklM) is incident, first time refraction is there is at interface (square RUTn), refracted ray yp and incident ray oy point-blank, second time refraction is there is in the bottom surface (△ nlk) of interface second medium unit (positive triangular pyramid nldk), third time refraction is there is in the light pq after this second time refraction in first side (△ dlk) of interface the 3rd media units (tetrahedron dhlk), light qr after this third time refraction is parallel with initial incident light oy, and the stealthy region in the middle of having walked around, according to the invertibity of light path and the symmetry of structure, the 4th refraction is there is in the light qr of this third time refraction in first side (△ lhk) of interface the 3rd media units (tetrahedron dhlk), the 5th refraction is there is in the light rs after the 4th refraction in the bottom surface (△ ilk) of interface second medium unit (positive triangular pyramid lkih), the 6th refraction is there is in the light sz ' after the 5th refraction in second side (square EHGi) of interface first medium unit (heptahedron iEHGMkl), light z ' t after 6th refraction penetrates from second side (square EHGi) of first medium unit (heptahedron iEHGMkl), and with initial incident light oy on same straight line.
As shown in Figure 7, from the light uw that the second side (square RUTn) perpendicular to first medium unit (heptahedron nRTUklM) is incident, first time refraction is there is in second side (square RUTn) of interface first medium unit (heptahedron nRTUklM), second time refraction is there is in the light wx after this first time refraction in first side (△ lkM) of interface first medium unit (heptahedron iEHGMkl), third time refraction is there is in the light xz after this second time refraction in second side (square EHGi) of interface first medium unit (heptahedron iEHGMkl), zv after this third time refraction penetrates from the second side (square EHGi) from first medium unit (heptahedron iEHGMkl).Because light is all the time perpendicular to each interface of incidence, therefore light uw, light wx, light xz and light zv are all the time on same straight line, and the stealthy region in the middle of all having walked around.
In like manner, for the stealthy device of the present invention, although Fig. 7 merely illustrates the example from a direction vertical incidence light, due to the symmetry of structure, for any any one second side (square NOnQ perpendicular to first medium unit, square QnTS, square PRnO, square RUTn, square UMkT, square STkL, square HGkM, square GFLk, square NOjI, square OPJj, square BjJC, square AIjB, square NImQ, square QmLS, square DFLm, square IADm, square PJlR, square RlMU, square EHMl, square JCEl, square ABiD, square DiGF, square EHGi, square BCEi) incident ray, its incidence point or drop on stealthy device arbitrary outer wall in connect in square, or connect outside square in the arbitrary outer wall dropping on stealthy device, the equal cavity walking around place, stealthy region, make the object in cavity stealthy, reach the stealth effect the same with the example of Fig. 7.Therefore, this concealed device can realize the stealth effect of six direction at three dimension scale.
Light is relevant with the polarised direction of incident light in the refraction situation at anisotropic medium interface place.Different from the situation of anisotropic medium, the stealthy device of the present invention first medium unit, second medium unit and the 3rd media units used is all isotropic, refraction at the interface place of these media and the polarised direction of incident light have nothing to do, so the polarised direction of the stealth effect of the stealthy device of the present invention and light has nothing to do, can realize stealthy to complete polarization light.
For the electromagnetic wave of other frequencies, when electromagnetic wave is from any one outer surface vertical incidence of the stealthy device of the present invention, the stealthy device of the present invention can realize the stealth effect of six direction at three dimension scale to complete polarization direction electromagnetic wave equally.
Claims (3)
1. the stealthy device of 3 D electromagnetic ripple, it is characterized in that: the cube closed in its to be the centre surrounded by eight first medium unit, eight second medium unit and 12 the 3rd media units be stealthy region, the refractive index of described 3rd media units is greater than the refractive index of first medium unit, and the refractive index of first medium unit is greater than the refractive index of second medium unit;
Described each first medium unit is the heptahedron formed after a cube has lacked a positive triangular pyramid, this cubical rib is long is l, l > 0, the summit of this positive triangular pyramid is this cubical summit, three ribs that three inclines of this positive triangular pyramid are these cubical three is accordingly intersection point with this summit, the cut surface that this cube obtains after lacking this positive triangular pyramid is equilateral triangle, and the length of side of this equilateral triangle is
three first sides in isosceles right triangle shape of each first medium unit overlap completely from first side of different first medium unit respectively;
Described each second medium unit is positive Rhizoma Sparganii taper, and the rib length of the incline of each second medium unit is
wherein, 0<a<1/3, the isosceles triangle to be drift angle be in the side of each second medium unit obtuse angle; The bottom surface of each second medium unit overlaps completely with the cut surface of a first medium unit respectively;
Described each 3rd media units is the tetrahedron be made up of two first side and two the second sides, first side and the second side are all in isosceles triangle shape, wherein, the drift angle of the first side is obtuse angle, the drift angle of the second side is acute angle, the connecting line on the summit of two the first sides is the base of two the second sides, and the connecting line on the summit of two the second sides is the base of two the first sides; Each first side of each the 3rd media units overlaps completely with a side of a second medium unit respectively; The length on the base of the second side is 2al, and wherein, 0<a<1/3, each second side of each the 3rd media units is the wall in described stealthy region.
2. stealthy device according to claim 1, is characterized in that: the refractive index of each media units meets following formula relation:
Wherein, 0<a≤b<1/3; n
1represent the refractive index of first medium unit, n
2represent the refractive index of second medium unit, n
3represent the refractive index of the 3rd media units.
3. stealthy device according to claim 1 and 2, is characterized in that: electromagnetic wave is by the outer surface vertical incidence of described stealthy device.
Priority Applications (1)
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