CN103366650A - Road information display screen based on metamaterial satellite antenna - Google Patents

Abstract

The invention discloses a road information display screen based on a metamaterial satellite antenna. The road information display screen comprises a metamaterial satellite antenna system for receiving satellite signals and a display device for displaying the satellite signals. The metamaterial satellite antenna system comprises a tuner, a horizontal metamaterial panel and a reflecting plate located at the back of the metamaterial panel. The metamaterial panel comprises multiple metamaterial sheet layers. Each metamaterial sheet layer comprises a substrate and artificial micro-structures which are periodically arranged on the substrate. Due to the fact that the panel satellite antenna is made of metamaterials, the panel satellite antenna can be well integrated with the existing road information display screens. The road information display screen is small in size, simple to mount and maintain and low in production cost, good user experience can be brought to motor vehicle drivers, and the drivers can learn about road information in real time.

Description

A kind of road information display screen based on super material satellite antenna

Technical field

The present invention relates to a kind of road information display screen, relate in particular to a kind of road information display screen based on super material satellite antenna.

Background technology

The road information display screen refers to be set up in the display device that is used for showing road conditions or information of vehicles etc. of all kinds of highways or city highway top.Existing road information display screen is mainly used to show and is fixedly arranged on its inner LED signal literal or advertisement picture etc., and the driver needs most the information about condition of road surface of understanding, and the broadcasting equipment that information such as traffic congestion time, traffic congestion location, accident treatment time and location is generally issued and is installed on the automobile by the radio station receives broadcast.Existing road information display screen can not show directly that the reason of traffic information is that mainly the road information display screen can not be integrated and receiving satellite signal in good and existing satellite antenna set.

Existing satellite antenna is by the reflecting surface that is parabolic shape and be positioned at the feed of reflecting surface focus and tuner consists of, and the reflecting surface of parabolic shape is used for receiving the feeble signal that transmitted by satellite and it is converged in the feed and tuner at focus place.The reflecting surface of parabolic shape brings a series of defective, for example can not with existing flat road information display screen efficient set, and the reflecting surface requirement on machining accuracy of parabolic shape is very high, volume is large, involve great expense.

Summary of the invention

Technical matters to be solved by this invention is, for the above-mentioned deficiency of prior art, proposes a kind of road information display screen based on super material satellite antenna.Super material satellite antenna processing in this road information display screen is simple, cost is lower and be shaped as tabular, small volume, and it can well be gathered with the display device of routine, and installation and maintenance is simple.

The present invention solves the technical scheme that its technical matters adopts, and proposes a kind of road information display screen based on super material satellite antenna, and it comprises the super material satellite antenna system for receiving satellite signal, for the display device of demonstration road information; Described super material satellite antenna system comprises tuner, the super material of the flat board of horizontal positioned and the reflecting plate that is positioned at the super material of described flat board rear surface, the super material of described flat board comprises the super sheet of material of multilayer, every layer of super sheet of material comprises that base material and cycle are arranged in the artificial microstructure on the base material, be divided into a plurality of belt-like zones according to index distribution on the described super sheet of material, take tuner equivalence virtual point source at the subpoint on described super sheet of material plane as the center of circle, the refractive index at same radius place is identical on described a plurality of belt-like zone, increase refractive index along with radius on each belt-like zone reduces gradually, adjacent two belt-like zones, near the refractive index minimum value of the belt-like zone of center of circle side less than the refractive index maximal value away from the belt-like zone of center of circle side.

Further, on described each belt-like zone, along with the increase of radius, the largest refractive index value that refractive index value all has from described super sheet of material is reduced to the minimum refractive index value that described super sheet of material has gradually.

Further, the super sheet of material of the first side of nearly described high frequency surface is described super sheet of material front surface, the opposite side surface relative with described front surface is described super sheet of material rear surface, take the intersection point of the described tuner axis of symmetry and described super material front surface as true origin, surface level is the y axle, face perpendicular to surface level is the x axle, sidelights near tuner on the super material are super material right side, be super material left side away from super material one sidelights, the y coordinate figure of the end points of close true origin is consistent along end points y coordinate figure with super material the right on the tuner bore face; The refractive index value of described super sheet of material xsect is along with the y value changes, and its index distribution n (y) satisfies following formula:

$n\left(y\right)=n_{\max }-\frac{(n_{\max }-n_{\min })*[{\mathrm{<figure-callout\; id="1"\; label="d"\; filenames="HDA0000149653320000011.png"\; state="\{\{state\}\}">d</figure-callout>}}_1+d_2-\mathrm{ss}-\mathrm{\&lambda;}*\mathrm{floor}\left(\frac{{\mathrm{<figure-callout\; id="1"\; label="d"\; filenames="HDA0000149653320000011.png"\; state="\{\{state\}\}">d</figure-callout>}}_1+d_2-\mathrm{ss}}{\mathrm{\&lambda;}}\right)]}{\mathrm{\&lambda;}};$

${\mathrm{<figure-callout\; id="1"\; label="d"\; filenames="HDA0000149653320000011.png"\; state="\{\{state\}\}">d</figure-callout>}}_1=\sqrt{x_2^2+{(y-y_2)}^2};$

d ₂＝(H-h-y)*sinγ；

$x_2=\frac{h+\frac{\mathrm{<figure-callout\; id="2"\; label="d"\; filenames="HDA0000149653320000011.png,HDA0000149653320000042.png"\; state="\{\{state\}\}">d</figure-callout>}}{2}*\cos \mathrm{\&theta;}}{\tan \mathrm{\&theta;}}+d_s*\cos \mathrm{\&theta;};$

$y_2=-h-\frac{\mathrm{<figure-callout\; id="2"\; label="d"\; filenames="HDA0000149653320000011.png,HDA0000149653320000042.png"\; state="\{\{state\}\}">d</figure-callout>}}{2}*\cos \mathrm{\&theta;}+d_s*\sin \mathrm{\&theta;};$

Wherein, the downward value function of floor function representation, θ are tuner axis of symmetry and y axle clamp angle, γ is the angle of the normal direction of satellite and dull and stereotyped super material plane, and h is the distance on edge, true origin anomaly plate super material the right, and H is the total length of dull and stereotyped super material, d is the diameter of tuner bore face, d _sBe the distance of tuner equivalence virtual point source and tuner bore face central point, λ is the electromagnetic wavelength of satellite radiation, is the electromagnetic wavelength of feed radiation when simulation calculation, n _MaxBe the largest refractive index value that super sheet of material has, n _MinThe minimum refractive index value that has for super sheet of material.

Further, described super sheet of material also comprises overlayer, and described overlayer material is identical with described base material material, makes by FR-4, F4B or PS material.

Further, the super material of described flat board also comprises outer impedance matching layer and internal layer impedance matching layer, the index distribution n of described outer impedance matching layer ₁(y) corresponding relation with the index distribution n (y) of described super sheet of material is:

n ₁(y)＝n _min+((2.545-n _min)*(n(y)-n _min)/(n _max-n _min))；

The index distribution n of described internal layer impedance matching layer ₂(y) corresponding relation with the index distribution n (y) of described super sheet of material is:

n ₂(y)＝n _min+((3.94-n _min)*(n(y)-n _min)/(n _max-n _min))。

Further, the super material of described flat board comprises two-layer super sheet of material, and each super sheet of material is identical with each impedance matching layer thickness, consists of by the microstructure of the overlayer of 0.254 millimeter thickness, 0.038 millimeter thickness and the base material of 0.254 millimeter thickness.

Further, described artificial microstructure is artificial metal micro structure, and described artificial metal's microstructure is attached on the described base material by etching, plating, brill quarter, photoetching, electronics is carved or ion is carved method.

Further, described metal micro structure topology pattern is isotropy.

Further, described metal micro structure is the plane flakes, described metal micro structure has the first metal wire and the second metal wire of mutually vertically dividing equally, described the first metal wire is identical with the length of the second metal wire, described the first metal wire two ends are connected with two the first metal branches of equal length, described the first metal wire two ends are connected on the mid point of two the first metal branches, described the second metal wire two ends are connected with two the second metal branches of equal length, described the second metal wire two ends are connected on the mid point of two the second metal branches, the equal in length of described the first metal branch and the second metal branch.

Further, each the first metal branch of the alabastrine metal micro structure in described plane and the two ends of each the second metal branch also are connected with identical the 3rd metal branch, and the mid point of corresponding the 3rd metal branch links to each other with the end points of the first metal branch and the second metal branch respectively.

Further, the first metal wire of the alabastrine metal micro structure in described plane and the second metal wire are provided with two kinks, and the alabastrine metal micro structure in described plane winds perpendicular to the axis of the first metal wire and the second metal wire intersection point figure to any direction 90-degree rotation and all overlaps with former figure.

Further, described tuner axis of symmetry and surface level angle θ are 32 °, the normal direction angle γ of satellite and the super material plane of described flat board is 35 °, the super material of true origin anomaly plate the right is 247.2 millimeters along distance h, tuner bore face diameter d is 47.2 millimeters, and virtual point source and tuner bore face central point are apart from d _sBe 1 millimeter, dull and stereotyped super Refractive Index of Material minimum value n _MinBe 1.48, dull and stereotyped super Refractive Index of Material maximal value n _MaxBe 5.07.

The present invention adopts the dull and stereotyped super material satellite antenna of super material principle preparation, and make itself and existing road display equipment well assemble one, so that road display equipment breaks away from the existing defective that can only show intrinsic literal or picture, so that road display equipment energy receiving satellite signal, the real-time update condition of road surface, the good user of person experiences to give the motor vehicle driving.Simultaneously, the present invention is based on that the road information display screen preparation technology of super material satellite antenna is simple, with low cost, volume is little, be convenient to installation and maintenance.

Description of drawings

Fig. 1 is the structural representation of the elementary cell of the super material of formation;

Fig. 2 is the structural representation that the present invention is based on the road information display screen of super material satellite antenna;

Fig. 3 is the schematic side view that the present invention is based on super material satellite antenna system in the road information display screen of super material satellite antenna;

Fig. 4 is the square section index distribution schematic diagram of the super material of Fig. 3 middle plateform;

Fig. 5 is the front surface index distribution schematic diagram of the super material of Fig. 3 middle plateform;

Fig. 6 is the topological pattern of the artificial microstructure in one embodiment of the invention;

Fig. 7 is a kind of derived structure of topological pattern shown in Figure 6;

Fig. 8 is a kind of distressed structure of topological pattern shown in Figure 6;

Fig. 9 is the phase one that the topology of the alabastrine metal micro structure in plane develops;

Figure 10 is the subordinate phase that the topology of the alabastrine metal micro structure in plane develops;

Figure 11 is the simulation waveform figure that utilizes behind the feed radiated electromagnetic wave;

Figure 12 is far field dB value test result figure.

Embodiment

Light, as electromagnetic a kind of, it is when passing glass, because the wavelength of light is much larger than the size of atom, therefore we can use the univers parameter of glass, and the details parameter of the atom of for example refractive index, rather than composition glass is described glass to the response of light.Accordingly, when research material was to other electromagnetic responses, any yardstick also can be used the univers parameter of material in the material to electromagnetic response much smaller than the structure of electromagnetic wavelength, and for example DIELECTRIC CONSTANT ε and magnetic permeability μ describe.The structure by every of designing material is so that thereby the specific inductive capacity of material each point and magnetic permeability are all identical or different so that the specific inductive capacity of material monolithic and magnetic permeability are certain rule arranges, the magnetic permeability that rule is arranged and specific inductive capacity can be so that material have response on the macroscopic view to electromagnetic wave, such as converging electromagnetic wave, divergent electromagnetic ripple etc.Such have magnetic permeability that rule arranges and specific inductive capacity material we be referred to as super material.

As shown in Figure 1, Fig. 1 is the perspective view of the elementary cell of the super material of formation.The elementary cell of super material comprises the base material 1 that artificial microstructure 2 and this artificial microstructure are adhered to.Among the present invention, artificial microstructure is artificial metal micro structure, artificial metal's microstructure has and can produce plane or the three-dimensional topological structure of response to incident electromagnetic wave electric field and/or magnetic field, and the pattern and/or the size that change the artificial metal's microstructure on each super material elementary cell can change each super material elementary cell to the response of incident electromagnetic wave.Among the present invention, also be coated with overlayer 3 on the artificial microstructure 2, overlayer 3, artificial microstructure 2 and base material 1 consist of the elementary cell of the super material of the present invention.A plurality of super material elementary cells are arranged according to certain rules can be so that super material has the response of macroscopic view to electromagnetic wave.Because super material monolithic needs have macroscopical electromagnetic response so each super material elementary cell need form continuous response to the response of incident electromagnetic wave to incident electromagnetic wave, this size that requires each super material elementary cell is preferably 1/10th of incident electromagnetic wave wavelength less than 1/5th of incident electromagnetic wave wavelength.During this section is described, the material monolithic that will surpass that we are artificial is divided into a plurality of super material elementary cells, but should know that this kind division methods only for convenience of description, should not regard super material as by a plurality of super material elementary cells splicings or assemble, super material is that artificial metal's microstructure cycle is arranged on the base material and can consists of in the practical application, and technique is simple and with low cost.Cycle arranges and refers to that namely the artificial metal's microstructure on above-mentioned our artificial each super material elementary cell of dividing can produce continuous electromagnetic response to incident electromagnetic wave.

The present invention namely utilizes a kind of flat super material satellite antenna of above-mentioned super material principle design, and it can meet or exceed the performance of the existing satellite antenna that is made of the reflecting surface of parabolic shape.And flat super material satellite antenna can well gather to consist of the road information display screen that the present invention is based on super material satellite antenna with flat display device, so that the display screen that is set up on the routes such as all kinds of highways or city highway can receiving satellite signal and real-time update and broadcast condition of road surface, so that having good user, the driver experiences.

As shown in Figures 2 and 3, Fig. 2 is the structural representation that the present invention is based on the road information display screen of super material satellite antenna, and Fig. 3 is the side view that the present invention is based on super material satellite antenna system 10 in the road information display screen of super material satellite antenna.The road information display screen that the present invention is based on super material satellite antenna comprises road information display screen back up pad 30, is fixedly arranged on the one or more display device 20 on the road information display screen back up pad 30, and super material satellite antenna system 10.Can set firmly a plurality of display device 20 on the road information display screen back up pad 30, each display device 20 can correspondence one be overlapped super material satellite antenna system in order to show different road informations, also can a plurality of display device 20 corresponding overlap super material satellite antenna system, so that a plurality of display device 20 all show identical road information, so that the beholder all can see road information from different orientation and angle.Display device 20 can be the various display screens such as LED display, LCD display, plasma panel.

Super material satellite antenna system 10 comprises for receiving satellite signal and with the satellite-signal frequency reducing and the tuner 11 of amplification, the super material 12 of flat board of horizontal positioned, the reflecting plate 14 that is positioned at the super material of flat board 12 backs and the support 13 that is used for supporting high frequency head 11 that receive.Support 13 can be fixed on the dull and stereotyped super material 12 by an end, and other end supporting high frequency head 11 also can be fixed on ground or the display device by an end other end supporting high frequency head 11.The metallic reflection plate that reflecting plate can adopt all kinds of metals to make is as long as it can reach the function of reflection electromagnetic wave.

Below discuss in detail the design of dull and stereotyped super material 12 and tuner 11.Because the super material 12 of flat board of horizontal positioned is that the plane wave that satellite sends is converged in the tuner, by tuner plane wave signal is carried out frequency reducing and amplifies processing.Herein, the initial electromagnetic wave of satellite radiation is actual to be spherical wave, but extremely far away because of the super material 12 of satellite anomaly plate, when the spherical wave that sends when satellite arrived dull and stereotyped super material 12, the sphere electromagnetic wave can be regarded as plane electromagnetic wave.In emulation testing and computation process, reversibility according to the Electromagnetic Wave Propagation path, use the emitting antenna of energy emitting electromagnetic wave, replace tuner such as feed or primary radiator etc., in the present embodiment, when emulation testing and calculating, adopt feed to replace tuner, the sphere electromagnetic wave that the feed radiation frequency is identical with the wave frequency of satellite radiation and the spherical wave of feed radiation radiate after being converted to plane electromagnetic wave by the super material 12 of flat board, and the far field parameters of the plane electromagnetic wave after test is changed by dull and stereotyped super material 12 can be determined the performance of super material satellite antenna receiving satellite signal in the actual motion.

Please continue with reference to Fig. 3.Dull and stereotyped super material can be made of the identical super sheet of material of one or more pieces index distribution.Among Fig. 3, the super sheet of material of one deck only is shown and the super sheet of material of this one deck is considered as dull and stereotyped super material.Among Fig. 3, will be designated as dull and stereotyped super material front surface near the dull and stereotyped super material surface of a side of tuner, the opposite side relative with front surface is designated as dull and stereotyped super material rear surface, the also back of namely dull and stereotyped super material.

11 one-tenth horn-like and dull and stereotyped super materials of bore direction sensing of tuner, the intersection point of the tuner axis of symmetry and super material front surface is designated as the true origin 0 (0 in the computation process, 0), surface level is designated as the y axle in the computation process, be designated as x axle in the computation process perpendicular to the surface of surface level, the angle of tuner axis of symmetry and y axle is θ.End points near true origin on the tuner bore face is the A point, and its coordinate is designated as (x ₀, y ₀), the y coordinate figure that A is ordered is consistent along the y coordinate figure of end points with dull and stereotyped super material the right, and among the present invention, the sidelights near tuner on the dull and stereotyped super material are dull and stereotyped super material right side, are dull and stereotyped super material left side away from super material one sidelights of flat board.In addition, because in same geographic coverage, the position angle of same satellite and the elevation angle are all fixing, then the angle of the normal direction of this satellite and super material plane is also fixing, the position angle of remembering a certain satellite is α, the elevation angle is β, and the angle γ that then can draw the normal direction of this satellite and super material plane is cos ^-1(cos α * cos β).Reflecting plate 14 is close to the rear surface placement of super material 11, is used in the reflection of electromagnetic wave tremendously high frequency head after the super material modulation of flat board.

Note true origin 0 is h with the distance on edge, dull and stereotyped super material 12 the right, and the diameter of the bore face of tuner 11 is d, then tuner bore face central point B (x ₁, y ₁) y coordinate y ₁For: y ₁=-h-(d*cos θ)/2, x coordinate x ₁For: x ₁=(h+d/2*cos θ)/tan θ.In the actual computation process, be a virtual point source C (x with trumpet-shaped tuner equivalence ₂, y ₂), virtual point source C is positioned on the tuner axis of symmetry, and the distance of itself and tuner bore face central point B is d _s, then the coordinate figure of virtual point source C is: x ₂=x ₁+ d _s* cos θ, y ₂=y ₁-d _s* sin θ.

The total length of the dull and stereotyped super material 12 of note is H, and on the square section of the super material 12 of flat board, its index distribution only changes and changes along with the y value, and its refractive index is unchanged in the x direction.On the super material square section, take the intersection point of the tuner axis of symmetry and super material front surface as true origin, the index distribution n of super sheet of material (y) can draw by following formula:

$n\left(y\right)=n_{\max }-\frac{(n_{\max }-n_{\min })*[{\mathrm{<figure-callout\; id="1"\; label="d"\; filenames="HDA0000149653320000011.png"\; state="\{\{state\}\}">d</figure-callout>}}_1+d_2-\mathrm{ss}-\mathrm{\&lambda;}*\mathrm{floor}\left(\frac{{\mathrm{<figure-callout\; id="1"\; label="d"\; filenames="HDA0000149653320000011.png"\; state="\{\{state\}\}">d</figure-callout>}}_1+d_2-\mathrm{ss}}{\mathrm{\&lambda;}}\right)]}{\mathrm{\&lambda;}}$

In the following formula, ${\mathrm{<figure-callout\; id="1"\; label="d"\; filenames="HDA0000149653320000011.png"\; state="\{\{state\}\}">d</figure-callout>}}_1=\sqrt{x_2^2+{(y-y_2)}^2}$

d ₂＝(H-h-y)*sinγ

ss＝(H-h-y ₂)*sinγ+x ₂*cosγ

$x_2=x_1+d_s*\cos \mathrm{\&theta;}=\frac{h+\frac{\mathrm{<figure-callout\; id="2"\; label="d"\; filenames="HDA0000149653320000011.png,HDA0000149653320000042.png"\; state="\{\{state\}\}">d</figure-callout>}}{2}*\cos \mathrm{\&theta;}}{\tan \mathrm{\&theta;}}+d_s*\cos \mathrm{\&theta;}$

$y_2=y_1-d_s*\sin \mathrm{\&theta;}=-h-\frac{\mathrm{<figure-callout\; id="2"\; label="d"\; filenames="HDA0000149653320000011.png,HDA0000149653320000042.png"\; state="\{\{state\}\}">d</figure-callout>}}{2}*\cos \mathrm{\&theta;}+d_s*\sin \mathrm{\&theta;}$

Wherein, the downward value function of floor function representation, θ are tuner axis of symmetry and y axle clamp angle, γ is the angle of the normal direction of satellite and dull and stereotyped super material plane, and h is the distance on edge, true origin anomaly plate super material the right, and H is the total length of dull and stereotyped super material, d is the diameter of tuner bore face, d _sBe the distance of tuner equivalence virtual point source and tuner bore face central point, λ is the electromagnetic wavelength of satellite radiation, is the electromagnetic wavelength of feed radiation when simulation calculation, n _MaxBe the largest refractive index value that super sheet of material has, n _MinThe minimum refractive index value that has for super sheet of material.

In reality test and installation process, tuner axis of symmetry and horizontal plane angle θ, the super material of true origin anomaly plate the right are adjustable parameter along parameters such as distance h, by regulating those parameters to reach optimal effectiveness.After obtaining the cross section index distribution n (y) of super sheet of material, with straight line y=y ₂For axis with the square section index distribution at super sheet of material Plane Rotation, can obtain the index distribution of super sheet of material integral body.Such as Fig. 4, shown in Figure 5, Fig. 4 is super sheet of material square section index distribution schematic diagram, and Fig. 5 is the positive index distribution schematic diagram of super sheet of material.By Fig. 4, Fig. 5 as can be known, on the super sheet of material, can be divided into a plurality of belt-like zones according to index distribution and (use respectively H1 among the figure, H2, H3, H4, H5 represents), take equivalent virtual point source C point at the vertical projection point on the super material of flat board plane of living in as the center of circle, the refractive index at same radius r place is identical on described a plurality of belt-like zone, and the increase refractive index along with radius r on each belt-like zone reduces gradually, adjacent two belt-like zones, near the minimum value of the refractive index of the belt-like zone in the center of circle less than the maximal value away from the refractive index of the belt-like zone in the center of circle.Preferably, on each belt-like zone along with the increase of radius, the largest refractive index value n that refractive index value all has from super sheet of material _MaxBe decreased to gradually minimum refractive index value n _MinCan imagine ground, when the super length of material of flat board can not perfect intercepting belt-like zone whole index distribution the time, the largest refractive index of the belt-like zone of the super sheet of material of close virtual point source can not be the largest refractive index value n of super sheet of material _Max, the minimum refractive index away from the belt-like zone of the super sheet of material of virtual point source can not be the minimum refractive index value n of super sheet of material _Min

After determining the index distribution of super sheet of material, need to be on the super material elementary cell out of virtual division on the super sheet of material cycle artificial microstructure of arranging, changing the refractive index value of every of super sheet of material, thereby so that super sheet of material obtains above-mentioned index distribution.The topology of artificial microstructure and size can affect the refractive index value of its super material elementary cell of adhering to, and in this step, can adopt the mass computing mode to choose topology and the size of suitable artificial microstructure from database.The largest refractive index value of dull and stereotyped super material and the requirement of minimum refractive index value are satisfied in the requirement that the artificial microstructure of choosing need to satisfy each point index distribution value on the one hand also needs.As shown in Figure 6, it is the topological pattern of the artificial microstructure in one embodiment of the invention.This artificial microstructure topological structure is for being isotropic plane snowflake type.Isotropy refers to all overlap with original pattern by the new pattern that obtains behind any direction half-twist along the microstructure central point with microstructure in microstructure institute in the plane.Adopt isotropic microstructure energy simplified design, its electromagnetic wave to all directions of vertical microstructure place plane incident all has identical electromagnetic response, has good consistance.

The microstructure of plane snowflake type has the first metal wire J1 and the second metal wire J2 that mutually vertically divides equally, described the first metal wire J1 is identical with the length of the second metal wire J2, described the first metal wire J1 two ends are connected with two the first F1 of metal branch of equal length, described the first metal wire J1 two ends are connected on the mid point of two the first F1 of metal branch, described the second metal wire J2 two ends are connected with two the second F2 of metal branch of equal length, described the second metal wire J2 two ends are connected on the mid point of two the second F2 of metal branch, the equal in length of described the first F1 of metal branch and the second F2 of metal branch.

Fig. 7 is a kind of derived structure of the alabastrine metal micro structure in plane shown in Figure 6.Its two ends at each first F1 of metal branch and each the second F2 of metal branch all are connected with identical the 3rd F3 of metal branch, and the mid point of corresponding the 3rd F3 of metal branch links to each other with the end points of the first F1 of metal branch and the second F2 of metal branch respectively.The rest may be inferred, and the present invention can also derive the metal micro structure of other form.

Fig. 8 is a kind of distressed structure of the alabastrine metal micro structure in plane shown in Figure 6, the metal micro structure of this kind structure, the first metal wire J1 and the second metal wire J2 are not straight lines, but folding line, the first metal wire J1 and the second metal wire J2 are provided with two kink WZ, but the first metal wire J1 remains vertical with the second metal wire J2 to be divided equally, by arrange kink towards with the relative position of kink on the first metal wire and the second metal wire all overlap with former figure so that metal micro structure shown in Figure 8 winds perpendicular to the axis of the first metal wire and the second metal wire intersection point figure to any direction 90-degree rotation.In addition, other distortion can also be arranged, for example, the first metal wire J1 and the second metal wire J2 all arrange a plurality of kink WZ.

After obtaining the concrete topological pattern of microstructure, can obtain by the mode that microstructure is proportionally dwindled, amplified the index distribution of whole super sheet of material, also can by take a concrete micro structured pattern as fundamental figure, obtain the index distribution of whole super sheet of material in the mode that obtains fundamental figure by differentiation.Below introduce take the plane snowflake type as fundamental figure in detail, obtain the concrete steps of super sheet of material index distribution by the differentiation mode:

(1) determines the base material that adheres to of microstructure.When super material elementary cell also comprised overlayer, tectal material was identical with the base material material.The base material material can be chosen FR-4, F4B or PS material, no matter chooses which kind of material, all can determine the refractive index value of base material.In the present embodiment, the base material that the PS material of the overlayer that the super sheet of material of individual layer is made by the PS material of 0.254 millimeter thickness, the microstructure of 0.038 millimeter thickness and 0.254 millimeter thickness is made consists of, and the super sheet of material thickness of individual layer is 0.546 millimeter.

(2) size of definite super material cell.The size of super material cell is obtained by the centre frequency of satellite, utilizes frequency to obtain its wavelength, gets less than numerical value of 1/5th of wavelength length C D and width KD as super material cell D again.Among the present invention, the frequency of operation of satellite antenna is 11.7-12.2GHZ, adopts the centre frequency of 11.95GHZ during design.In the present embodiment, the length C D of described super material cell D and width KD are 2.8 millimeters.

(3) determine material and the topological structure of microstructure.In the present embodiment, the material of microstructure is copper, and the topological structure of microstructure is the alabastrine metal micro structure in plane shown in Figure 6, and its live width W is consistent everywhere; Topological structure herein refers to the fundamental figure that topology develops.

(4) determine the topology parameter of metal micro structure.As shown in Figure 6, in the present embodiment, the topology parameter of the alabastrine metal micro structure in plane comprises the live width W of metal micro structure, the length a of the first metal wire J1, the length b of the first F1 of metal branch.

(5) determine the differentiation restrictive condition of the topology of metal micro structure.In the present embodiment, the differentiation restrictive condition of the topology of metal micro structure has, the minimum spacing WL between the metal micro structure (namely as shown in Figure 6, the distance of the long limit of metal micro structure and super material cell or broadside is WL/2), the live width W of metal micro structure, the size of super material cell; Because the processing technology restriction, WL is more than or equal to 0.1mm, and same, live width W is greater than to equal 0.1mm.In the present embodiment, WL gets 0.1mm, and W gets 0.3mm, and super material cell is of a size of the long and wide 2.8mm that is, this moment, the topology parameter of metal micro structure only had a and two variablees of b.The passing through such as Fig. 9 of the topology of metal micro structure corresponding to a certain characteristic frequency (for example 11.95GHZ), can obtain a continuous variations in refractive index scope to differentiation mode shown in Figure 10.

Particularly, the differentiation of the topology of described metal micro structure comprises two stages (fundamental figure that topology develops is metal micro structure shown in Figure 5):

Phase one: according to developing restrictive condition, in the situation that the b value remains unchanged, a value is changed to maximal value from minimum value, the metal micro structure in this evolution process is " ten " font (except when a gets minimum value).In the present embodiment, the minimum value of a is 0.3mm (live width W), and the maximal value of a is (CD-WL), i.e. 2.8-0.1mm, and then the maximal value of a is 2.7mm.Therefore, in the phase one, the differentiation of the topology of metal micro structure as shown in figure 10, namely be the square JX1 of W from the length of side, develop into gradually maximum " ten " font topology JD1, in " ten " font topology JD1 of maximum, the first metal wire J1 and the second metal wire J2 length are 2.7mm, and width W is 0.3mm.In the phase one, differentiation along with the topology of metal micro structure, the refractive index of the super material cell corresponding with it increases continuously that ((respective antenna one characteristic frequency), when frequency was 11.95GHZ, the minimum value nmin of the refractive index that super material cell is corresponding was 1.48.

Subordinate phase: according to developing restrictive condition, when a was increased to maximal value, a remained unchanged; At this moment, b is increased continuously maximal value from minimum value, the metal micro structure in this evolution process is the plane flakes.In the present embodiment, the minimum value of b is 0.3mm (live width W), and the maximal value of b is (CD-WL-2W), i.e. 2.8-0.1-2*0.3mm, and then the maximal value of b is 2.1mm.Therefore, in subordinate phase, the differentiation of the topology of metal micro structure as shown in figure 11, namely from " ten " font topology JD1 of maximum, develop into gradually the maximum alabastrine topology JD2 in plane, the alabastrine topology JD2 in the plane of maximum herein refers to, the length b of the first J1 of metal branch and the second J2 of metal branch can not extend again, otherwise the first metal branch and the second metal branch will occur to intersect, and the maximal value of b is 2.1mm.At this moment, the first metal wire and the second metal wire length are 2.7mm, and width is 0.3mm, and the length of the first metal branch and the second metal branch is 2.1mm, and width is 0.3mm.In subordinate phase, along with the differentiation of the topology of metal micro structure, the refractive index of the super material cell corresponding with it increases (respective antenna one characteristic frequency) continuously, when frequency is 11.95GHZ, and the maximal value n of the refractive index that super material cell is corresponding _MaxBe 5.69, the present invention only gets 5.07 largest refractive index when design.

In the evolution process of above-mentioned phase one and subordinate phase, need all to guarantee that the topological pattern of the microstructure in the evolution process is isotropic topological pattern.

The variations in refractive index scope (1.48-5.69) that obtains super material cell by above-mentioned differentiation satisfies the design needs.Do not satisfy the design needs if above-mentioned differentiation obtains the variations in refractive index scope of super material cell, for example maximal value is too little, then changes WL and W, and again emulation is until obtain the variations in refractive index scope that we need.

Obtain the index distribution of super sheet of material by above-mentioned design, behind the topological structure and size of the artificial microstructure of realization index distribution, in order to reduce to incide the electromagnetic wave on the super material because the reflection loss that the refractive index sudden change causes can also arrange the multilayer impedance matching layer on super sheet of material surface.Impedance matching layer also can adopt the method design of the super sheet of material of above-mentioned design, and difference is, the gradually changed refractive index of each layer impedance matching layer.The gradually changed refractive index of each layer impedance matching layer to the mode of the index distribution of super sheet of material can be linear distribution gradual manner, power value distribution gradual manner, binomial distribution gradual manner or Chebyshev's gradual manner etc.

The below determines the parameter of the super material satellite antenna of the present invention, and tests under those parameters the performance of super material satellite antenna.In the present embodiment, dull and stereotyped super material adopts the super material with impedance matching layer, is made of 2 layers of super sheet of material and 2 layer impedance matching layers, and dull and stereotyped super material front is of a size of 550mmX550mm, and thickness is 0.546X4=2.184mm.Also can be found out by this size, the volume of the super material satellite antenna of the present invention is little, be easy to carry about with one, be easy to install.32 ° of feed axis of symmetry and surface level angle θ values, satellite is 35 ° with the normal direction angle γ of dull and stereotyped super material plane.The super material of true origin 0 anomaly plate the right is 247.2 millimeters along distance h, and feed bore face diameter d is 47.2 millimeters, and virtual point source and feed bore face central point are apart from d _sBe 1 millimeter, dull and stereotyped super Refractive Index of Material minimum value n _MinBe 1.48, dull and stereotyped super Refractive Index of Material maximal value n _MaxBe 5.07.The index distribution of outer impedance matching layer and internal layer impedance matching layer adopts following formula to determine:

Outer impedance matching layer index distribution n ₁(y)=n _Min+ ((2.545-n _Min) * (n (y)-n _Min)/(n _Max-n _Min)); Internal layer impedance matching layer index distribution n ₂(y)=n _Min+ ((3.94-n _Min) * (n (y)-n _Min)/(n _Max-n _Min)).

Simulation result such as Figure 11, shown in Figure 12 of utilizing above-mentioned parameter to obtain.Figure 11 is the oscillogram of utilizing behind the feed radiated electromagnetic wave, and striped represents the electromagnetic wave propagated among the figure, and as can be seen from Figure 11, the spherical wave of feed radiation radiate with the plane wave form after by the super material response of flat board and reflection.Figure 12 is far field dB value test result figure.Among Figure 12, the horizontal ordinate angle value represents to depart from the angle of dull and stereotyped super material plane normal normal direction, as can be known from Fig. 12, departing from approximately 35 ° of dull and stereotyped super material plane normal directions, have maximum far field value, and in the emulation, satellite also is 35 ° with the normal direction angle γ of dull and stereotyped super material plane, therefore can instead release, when adopting tuner to receive the signal of this satellite launch, also have best performance.

The above is described embodiments of the invention by reference to the accompanying drawings; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment only is schematic; rather than restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not breaking away from the scope situation that aim of the present invention and claim protect, also can make a lot of forms, these all belong within the protection of the present invention.

Claims (12)

1. the road information display screen based on super material satellite antenna is characterized in that: comprise the super material satellite antenna system for receiving satellite signal, be used for showing the display device of road information; Described super material satellite antenna system comprises tuner, the super material of the flat board of horizontal positioned and the reflecting plate that is positioned at the super material of described flat board rear surface, the super material of described flat board comprises the super sheet of material of multilayer, every layer of super sheet of material comprises that base material and cycle are arranged in the artificial microstructure on the base material, be divided into a plurality of belt-like zones according to index distribution on the described super sheet of material, take tuner equivalence virtual point source at the subpoint on described super sheet of material plane as the center of circle, the refractive index at same radius place is identical on described a plurality of belt-like zone, increase refractive index along with radius on each belt-like zone reduces gradually, adjacent two belt-like zones, near the refractive index minimum value of the belt-like zone of center of circle side less than the refractive index maximal value away from the belt-like zone of center of circle side.

2. road information display screen as claimed in claim 1, it is characterized in that: on described each belt-like zone, along with the increase of radius, the largest refractive index value that refractive index value all has from described super sheet of material is reduced to the minimum refractive index value that described super sheet of material has gradually.

3. road information display screen as claimed in claim 2, it is characterized in that: be described super sheet of material front surface near the super sheet of material of the first side of described high frequency surface, the opposite side surface relative with described front surface is described super sheet of material rear surface, take the intersection point of the described tuner axis of symmetry and described super material front surface as true origin, surface level is the y axle, face perpendicular to surface level is the x axle, sidelights near tuner on the super material are super material right side, be super material left side away from super material one sidelights, the y coordinate figure of the end points of close true origin is consistent along end points y coordinate figure with super material the right on the tuner bore face; The refractive index value of described super sheet of material xsect is along with the y value changes, and its index distribution n (y) satisfies following formula:

$n\left(y\right)=n_{\max }-\frac{(n_{\max }-n_{\min })*[d_1+d_2-\mathrm{ss}-\mathrm{\&lambda;}*\mathrm{floor}\left(\frac{d_1+d_2-\mathrm{ss}}{\mathrm{\&lambda;}}\right)]}{\mathrm{\&lambda;}};$

$d_1=\sqrt{x_2^2+{(y-y_2)}^2};$

d ₂＝(H-h-y)*sinγ；

$x_2=\frac{h+\frac{d}{2}\cos \mathrm{\&theta;}}{\tan \mathrm{\&theta;}}+d_s*\cos \mathrm{\&theta;};$

$y_2=-h-\frac{d}{2}*\cos \mathrm{\&theta;}+d_s*\sin \mathrm{\&theta;};$

Wherein, the downward value function of floor function representation, θ are tuner axis of symmetry and y axle clamp angle, γ is the angle of the normal direction of satellite and dull and stereotyped super material plane, and h is the distance on edge, true origin anomaly plate super material the right, and H is the total length of dull and stereotyped super material, d is the diameter of tuner bore face, d _sBe the distance of tuner equivalence virtual point source and tuner bore face central point, λ is the electromagnetic wavelength of satellite radiation, is the electromagnetic wavelength of feed radiation when simulation calculation, n _MaxBe the largest refractive index value that super sheet of material has, n _MinThe minimum refractive index value that has for super sheet of material.

4. road information display screen as claimed in claim 3, it is characterized in that: described super sheet of material also comprises overlayer, described overlayer material is identical with described base material material, makes by FR-4, F4B or PS material.

5. road information display screen as claimed in claim 3, it is characterized in that: the super material of described flat board also comprises outer impedance matching layer and internal layer impedance matching layer, the index distribution n of described outer impedance matching layer ₁(y) corresponding relation with the index distribution n (y) of described super sheet of material is:

n ₁(y)＝n _min+((2.545-n _min)*(n(y)-n _min)/(n _max-n _min))；

The index distribution n of described internal layer impedance matching layer ₂(y) corresponding relation with the index distribution n (y) of described super sheet of material is:

n ₂(y)＝n _min+((3.94-n _min)*(n(y)-n _min)/(n _max-n _min))。

6. road information display screen as claimed in claim 5, it is characterized in that: the super material of described flat board comprises two-layer super sheet of material, each super sheet of material is identical with each impedance matching layer thickness, consists of by the microstructure of the overlayer of 0.254 millimeter thickness, 0.038 millimeter thickness and the base material of 0.254 millimeter thickness.

7. road information display screen as claimed in claim 3, it is characterized in that: described artificial microstructure is artificial metal micro structure, and described artificial metal's microstructure is attached on the described base material by etching, plating, brill quarter, photoetching, electronics is carved or ion is carved method.

8. road information display screen as claimed in claim 7 is characterized in that: described metal micro structure topology pattern is isotropy.

9. road information display screen as claimed in claim 8, it is characterized in that: described metal micro structure is the plane flakes, described metal micro structure has the first metal wire and the second metal wire of mutually vertically dividing equally, described the first metal wire is identical with the length of the second metal wire, described the first metal wire two ends are connected with two the first metal branches of equal length, described the first metal wire two ends are connected on the mid point of two the first metal branches, described the second metal wire two ends are connected with two the second metal branches of equal length, described the second metal wire two ends are connected on the mid point of two the second metal branches, the equal in length of described the first metal branch and the second metal branch.

10. road information display screen as claimed in claim 8, it is characterized in that: each the first metal branch of the alabastrine metal micro structure in described plane and the two ends of each the second metal branch also are connected with identical the 3rd metal branch, and the mid point of corresponding the 3rd metal branch links to each other with the end points of the first metal branch and the second metal branch respectively.

11. road information display screen as claimed in claim 8, it is characterized in that: the first metal wire of the alabastrine metal micro structure in described plane and the second metal wire are provided with two kinks, and the alabastrine metal micro structure in described plane winds perpendicular to the axis of the first metal wire and the second metal wire intersection point figure to any direction 90-degree rotation and all overlaps with former figure.

12. road information display screen as claimed in claim 6, it is characterized in that: described tuner axis of symmetry and surface level angle θ are 32 °, the normal direction angle γ of satellite and the super material plane of described flat board is 35 °, the super material of true origin anomaly plate the right is 247.2 millimeters along distance h, tuner bore face diameter d is 47.2 millimeters, and virtual point source and tuner bore face central point are apart from d _sBe 1 millimeter, dull and stereotyped super Refractive Index of Material minimum value n _MinBe 1.48, dull and stereotyped super Refractive Index of Material maximal value n _MaxBe 5.07.

Images