CN103367904A - Directional propagation antenna housing and directional aerial system - Google Patents

Directional propagation antenna housing and directional aerial system Download PDF

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Publication number
CN103367904A
CN103367904A CN2012100932948A CN201210093294A CN103367904A CN 103367904 A CN103367904 A CN 103367904A CN 2012100932948 A CN2012100932948 A CN 2012100932948A CN 201210093294 A CN201210093294 A CN 201210093294A CN 103367904 A CN103367904 A CN 103367904A
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core layer
metal
layer lamella
impedance matching
antenna
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CN103367904B (en
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刘若鹏
赵治亚
方小伟
王海莲
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Kuang Chi Institute of Advanced Technology
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Kuang Chi Innovative Technology Ltd
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Abstract

The invention discloses a directional propagation antenna housing and a directional aerial system. The directional propagation antenna housing is covered on an antenna; the directional propagation antenna housing comprises a meta-material plate; the feed source of the antenna is arranged to oppose to the meta-material plate; the line between the feed source equivalent points of the antenna and the center of the meta-material plate is perpendicular to the meta-material plate; the meta-material plate comprises a core layer; the core layer comprises a plurality of core layer lamellas and the core layer lamellas have the same thickness and the same refractive index distribution; each core layer lamella comprises a sheet-like first substrate and a plurality of first artificial microstructures arranged on the first substrate; the refractive index distribution of the core layer lamellas satisfies a formula indicated in the description. The refractive index distribution of the core layer is designed in such a way that enables the electromagnetic waves emitted by the feed source of the antenna to form plane waves through the meta-material plate. The manufacture and processing are easier, the cost is lower, and a traditional antenna without orientation functions can be directionally propagated, thus orientation needs are met.

Description

Direction propagation radome and beam aerial system
Technical field
The present invention relates to the communications field, more particularly, relate to direction propagation radome and beam aerial system.
Background technology
Super material is commonly called as super material, is a kind of novel artificial synthetic material, is the substrate of being made by nonmetallic materials and is attached on the substrate surface or a plurality of artificial micro-structural that is embedded in substrate inside consists of.Substrate can be divided into a plurality of base board units that rectangular array is arranged virtually, be attached with artificial micro-structural on each base board unit, thereby form a super material cell, whole super material is comprised of a lot of so super material cell, just as crystal is to be made of according to certain arranging countless lattices.Artificial micro-structural on each super material cell can be identical or incomplete same.Artificial micro-structural has certain geometric plane or a stereochemical structure by what wire formed, such as forming annular, I-shaped wire etc.
Because the existence of artificial micro-structural, each super material cell has the electromagnetic property that is different from substrate itself, so the super material that all super material cell consist of presents special response characteristic to Electric and magnetic fields; By concrete structure and the shape different to artificial microstructure design, can change the response characteristic of whole super material.
Generally speaking, antenna system all can be provided with radome.The purpose of radome is the impact that the protection antenna system is avoided wind and rain, ice and snow, sand and dust and solar radiation etc., makes the antenna system service behaviour more stable, reliable.Alleviate simultaneously wearing and tearing, the corrosion and aging of antenna system, increase the service life.But radome can not have other functions concurrently except the protection antenna function, function is very single.For example under the demand of electromagnetic wave directed radiation, existing radome can not satisfy this requirement, and needing to change antenna could realize, will cause like this waste of existing antenna.And existing radome can not adjust to the electromagnetic wave of aerial radiation on the specific direction as much as possible, so that the signal that reception antenna can receive is limited.
Summary of the invention
Technical problem to be solved by this invention is, for existing radome function singleness, do not possess the defective of electromagnetic wave directed radiation, provide a kind of can be with the electromagnetic direction propagation radome of direction propagation and beam aerial system.
In order to achieve the above object, the following technical scheme of the present invention's employing:
A kind of direction propagation radome, described direction propagation radome covers on the antenna, described direction propagation radome comprises super material panel, the feed of described antenna and described super material panel opposition arrange, and the line between the center of the feed equivalent point of described antenna and described super material panel is perpendicular to described super material panel;
Described super material panel comprises core layer, described core layer comprises a plurality of core layer lamellas that thickness is identical and refraction index profile is identical, described core layer lamella comprises the first base material of sheet and is arranged on a plurality of first artificial micro-structural on the first base material that the refraction index profile of described core layer lamella satisfies following formula:
n i ( r ) = n min + 1 d ( a i 2 + s 2 - r 2 + s 2 ) ;
a i + 1 2 + s 2 - a i 2 + s 2 = λ ;
Wherein, i represents core layer lamella segments, i=1 represent core layer lamella first paragraph, i=2 represent core layer lamella second segment ..., i=p represents the p section of core layer lamella, the center of the most close core layer lamella of described core layer lamella first paragraph;
n i(r) radius is the refractive index value at r place on the expression core layer lamella i section;
n MinThe minimum value of the refractive index of expression core layer lamella;
λ represents electromagnetic wavelength;
R represents that any point is apart from the distance at core layer lamella center on the core layer lamella;
S is that the feed equivalent point is to the vertical range of super material panel;
a iThe maximum at expression core layer lamella i segment distance core layer lamella center;
D represents the thickness of super material panel.
In direction propagation radome of the present invention, described the first base material comprises the first prebasal plate and first metacoxal plate of sheet, and described a plurality of first artificial micro-structural is folded between the first prebasal plate and the first metacoxal plate.
In direction propagation radome of the present invention, the thickness of described core layer lamella is 0.818mm, and wherein, the thickness of the first prebasal plate and the first metacoxal plate is 0.4mm, and the thickness of a plurality of the first artificial micro-structurals is 0.018mm.
In direction propagation radome of the present invention, described super material panel also comprises the impedance matching layer that is symmetrically distributed in the core layer both side surface, described impedance matching layer comprises a plurality of impedance matching layer lamellas that thickness is identical, described impedance matching layer lamella comprises the second base material of sheet and is arranged on a plurality of second artificial micro-structural on the second base material that the refraction index profile of described impedance matching layer lamella satisfies following formula:
n j ( r ) = n min j m * n ( r ) m - j m ;
λ＝(n max-n min)*(d+2*d1)；
Wherein, j represents the numbering of impedance matching layer lamella, apart from the m that is numbered of core layer impedance matching layer lamella farthest, reduce successively to core layer direction numbering, the impedance matching layer lamella nearest apart from core layer be numbered 1;
Above-mentioned n MaxAnd n MinThe maximum and the minimum value that represent respectively the refractive index of core layer lamella;
R represents that any point is to the distance at its center on the impedance matching layer lamella;
λ represents electromagnetic wavelength;
D1 is distributed in the wherein thickness of the impedance matching layer of a side surface of core layer;
D is the thickness of core layer.
In direction propagation radome of the present invention, described the second base material comprises the second prebasal plate and second metacoxal plate of sheet, and described a plurality of second artificial micro-structural is folded between the second prebasal plate and the second metacoxal plate.
In direction propagation radome of the present invention, the thickness of described impedance matching layer lamella is 0.818mm, and wherein, the thickness of the second prebasal plate and the second metacoxal plate is 0.4mm, and the thickness of a plurality of the second artificial micro-structurals is 0.018mm.
In direction propagation radome of the present invention, the described first artificial micro-structural and the second artificial micro-structural be the metal micro structure for being made of copper cash or silver-colored line all, and described metal micro structure is attached to respectively on the first base material and the second base material by etching, plating, brill quarter, photoetching, electronics is carved or ion is carved method.
In direction propagation radome of the present invention, 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.
In direction propagation radome of the present invention, 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.
The present invention also provides a kind of beam aerial system, comprises antenna, and aforesaid direction propagation radome, and described direction propagation radome covers on the described antenna.
According to direction propagation radome of the present invention and beam aerial system, by the refraction index profile of accurate design core layer, so that the electromagnetic wave that antenna feed is sent can form plane wave behind super material panel, to make processing and be more prone to, cost is cheaper.Radome provided by the invention satisfies focal need so that this antenna that does not possess orientating function can be realized direction propagation.And radome of the present invention so that aerial radiation go out can not adjust on the suitable radiation direction in the emittance on the reception antenna receive direction yet, as much as possible the electromagnetic wave of aerial radiation is adjusted on the receive direction of reception antenna, so that reception antenna can receive signal as much as possible, improved signal strength signal intensity.
Description of drawings
Fig. 1 is the relative position schematic diagram of direction propagation radome of the present invention and antenna;
Fig. 2 is the perspective diagram of one of them super material cell of core layer lamella of the present invention;
Fig. 3 is the structural representation of core layer lamella of the present invention;
Fig. 4 is the structural representation of impedance matching layer lamella of the present invention;
Fig. 5 is the schematic diagram of the alabastrine metal micro structure in plane of the present invention;
Fig. 6 is a kind of derived structure of the alabastrine metal micro structure in plane shown in Figure 5;
Fig. 7 is a kind of distressed structure of the alabastrine metal micro structure in plane shown in Figure 5.
Fig. 8 is phase I of differentiation of the topology of the alabastrine metal micro structure in plane;
Fig. 9 is the second stage of differentiation of the topology of the alabastrine metal micro structure in plane;
Figure 10 is the structural representation of the direction propagation radome of the another kind of embodiment of the present invention.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
As shown in Figure 1 to Figure 3, the direction propagation radome covers at antenna (for the position relationship of antenna and radome is described better, antenna is only illustrated with feed) on, the direction propagation radome comprises super material panel 100, the feed of antenna and super material panel 100 opposition arrange, and the line between the center of the feed equivalent point K of antenna and described super material panel 100 is perpendicular to super material panel 100.Super material panel 100 comprises core layer 10, core layer 10 comprises a plurality of core layer lamellas 11 that thickness is identical and refraction index profile is identical, core layer lamella 11 comprises the first base material 13 of sheet and is arranged on a plurality of first artificial micro-structural 12 on the first base material 13 that feed can be traditional corrugated horn in addition.The vertical sectional shape of core layer lamella 11 can be square, circular or oval according to different needs.
The refraction index profile of core layer lamella 11 satisfies following formula:
n i ( r ) = n min + 1 d ( a i 2 + s 2 - r 2 + s 2 ) - - - ( 1 ) ;
a i + 1 2 + s 2 - a i 2 + s 2 = λ - - - ( 2 ) ;
Wherein, i represents core layer lamella segments, i=1 represent core layer lamella first paragraph, i=2 represent core layer lamella second segment ..., i=p represents the p section of core layer lamella, the center of the most close core layer lamella of described core layer lamella first paragraph;
n i(r) radius is the refractive index value at r place on the expression core layer lamella i section;
n MinThe minimum value of the refractive index of expression core layer lamella;
λ represents electromagnetic wavelength;
R represents that any point is apart from the distance at core layer lamella center on the core layer lamella;
S is that the feed equivalent point is to the vertical range of super material panel 100;
a iThe maximum at expression core layer lamella i segment distance core layer lamella center;
D represents the thickness of super material panel 100.
By formula (1) and the determined super material panel 100 of formula (2), can be so that the electromagnetic wave that the feed of antenna sends can be with the form outgoing of plane wave behind super material panel 100.
Among the present invention, as shown in Figure 3, described the first base material 13 comprises the first prebasal plate 131 and first metacoxal plate 132 of sheet, and the described a plurality of first artificial micro-structural 12 is folded between the first prebasal plate 131 and the first metacoxal plate 132.Preferably, the thickness of described core layer lamella is 0.818mm, and wherein, the thickness of the first prebasal plate and the first metacoxal plate is 0.4mm, and the thickness of a plurality of the first artificial micro-structurals is 0.018mm.
Among the present invention, described super material panel also comprises the impedance matching layer 31 that is arranged on core layer 10 both side surface, described impedance matching layer 31 comprises a plurality of impedance matching layer lamellas 21 that thickness is identical, described impedance matching layer lamella 21 comprises the second base material 23 of sheet and is arranged on a plurality of second artificial micro-structural on the second base material 23 (indicating among the figure) that the refraction index profile of described impedance matching layer lamella satisfies following formula:
n j ( r ) = n min j m * n ( r ) m - j m - - - ( 3 ) ;
λ＝(n max-n min)*(d+2*d1) (4)；
Wherein, j represents the numbering of impedance matching layer lamella, and near the m that is numbered of the impedance matching layer lamella of feed and radome, to the core layer direction, numbering reduces successively by feed and radome, is numbered 1 near the impedance matching layer lamella of core layer;
Above-mentioned n Max, n MinIdentical with maximum, the minimum value of the refractive index of core layer lamella;
R represents that any point is to the distance at its center on the impedance matching layer lamella;
λ represents electromagnetic wavelength;
D1 is the thickness (thickness of the impedance matching layer of core layer one side) of impedance matching layer, the i.e. product of the thickness of impedance matching layer lamella and the number of plies.
D is the thickness of core layer, i.e. the product of the thickness of core layer lamella and the number of plies.
Among the present invention, described the second base material 23 comprises the second prebasal plate 231 and second metacoxal plate 232 of sheet, and described a plurality of second artificial micro-structural is folded between the second prebasal plate 231 and the second metacoxal plate 232, as shown in Figure 4.Preferably, the thickness of described impedance matching layer lamella is 0.818mm, and wherein, the thickness of the second prebasal plate and the second metacoxal plate is 0.4mm, and the thickness of a plurality of the second artificial micro-structurals is 0.018mm.
Formula (4) be used for to be determined the thickness of core layer and matching layer, after the thickness of core layer is definite, utilizes formula (4) can obtain the thickness of matching layer, namely obtains the number of plies j of impedance matching layer divided by every layer thickness with this thickness.
Among the present invention, the arbitrary longitudinal section of described super material panel is of similar shape and area, and namely core layer and matching layer are of similar shape the longitudinal section with area, and longitudinal section herein refers to section vertical with the axis of super material panel in the super material panel.The longitudinal section of described super material panel is square, circular or oval, and preferably, the longitudinal section of described super material flat-plate lens is square, and the super material panel that obtains is like this processed easily.Preferably, the longitudinal section of super material panel of the present invention is that the length of side is the square of 272mm.
In one embodiment of the invention, the number of plies of core layer lamella is 4 layers, and the thickness d of core layer is 3.272mm;
The impedance matching layer lamella is distributed in the core layer both sides, 2 layers of every sides, and the thickness d 1 of impedance matching layer is 1.636mm;
Among the present invention, the described first artificial micro-structural, the second artificial micro-structural be the metal micro structure for being made of copper cash or silver-colored line all, and described metal micro structure is attached to respectively the first base material, the second base material by etching, plating, brill quarter, photoetching, electronics is carved or ion is carved method.Preferably, the described first artificial micro-structural, the second artificial micro-structural are the alabastrine metal micro structure in plane shown in Figure 5 develops a plurality of different topology that obtains by topology metal micro structure.
Among the present invention, the core layer lamella can obtain by the following method, namely cover copper on any one surface of the first prebasal plate and the first metacoxal plate, obtain a plurality of the first metal micro structures (shape of a plurality of the first metal micro structures with arrange in advance to obtain by Computer Simulation) by etching method again, at last the first prebasal plate and the first metacoxal plate are pressed together respectively, namely obtain core layer lamella of the present invention, the method of pressing can be direct hot pressing, also can be to utilize PUR to connect, certainly also other mechanical connection, for example bolt connects.
In like manner, the impedance matching layer lamella also can utilize identical method to obtain.Then respectively with a plurality of core layer lamella pressing one, namely formed core layer of the present invention; Equally, with a plurality of impedance matching layer lamella pressing one, namely formed impedance matching layer of the present invention; Core layer, impedance matching layer pressing one are namely obtained super material panel of the present invention.
Among the present invention, described the first base material, the second base material are made by ceramic material, macromolecular material, ferroelectric material, ferrite material or ferromagnetic material etc.Macromolecular material is available F4B composite material, FR-4 composite material etc.Preferably, among the present invention, the first prebasal plate of described the first base material adopts identical FR-4 composite material with the first metacoxal plate; Equally, among the present invention, the second prebasal plate of described the second base material also adopts identical FR-4 composite material with the second metacoxal plate.
Figure 5 shows that the schematic diagram of the alabastrine metal micro structure in plane, described alabastrine metal micro structure 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. 6 is a kind of derived structure of the alabastrine metal micro structure in plane shown in Figure 5.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. 7 is a kind of distressed structure of the alabastrine metal micro structure in plane shown in Figure 5, 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 7 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.
Among the present invention, described core layer lamella 11 can be divided into a plurality of super material cell D as shown in Figure 2 of array arrangement, each super material cell D comprises prebasal plate unit U, metacoxal plate unit V and is arranged on the first artificial micro-structural 12 between base board unit U, the metacoxal plate unit V, usually the length and width height of super material cell D all is not more than 1/5th wavelength, be preferably 1/10th wavelength, therefore, can determine the size of super material cell D according to the operating frequency of antenna.Fig. 2 is the technique of painting of perspective, and with the position among the super material cell D that represents the first artificial micro-structural, as shown in Figure 2, the described first artificial micro-structural is sandwiched between base board unit U, the metacoxal plate unit V, and its surface, place represents with SR.
Known refractive index
Figure BDA0000149650880000081
Wherein μ is relative permeability, and ε is relative dielectric constant, and μ and ε are collectively referred to as electromagnetic parameter.Experiment showed, when electromagnetic wave passes through refractive index dielectric material heterogeneous, can be to the large direction deviation of refractive index.In the certain situation of relative permeability (usually near 1), refractive index is only relevant with dielectric constant, in the situation that the first base material is selected, utilize the arbitrary value (within the specific limits) that only can realize super material cell refractive index to the first artificial micro-structural of electric field response, under this center of antenna frequency (12.5GHZ), utilize simulation software, such as CST, MATLAB etc., obtain the situation that the dielectric constant of the artificial micro-structural (the alabastrine metal micro structure in plane as shown in Figure 5) of a certain given shape changes along with the refractive index variable of topology by emulation, can list one to one data, the core layer lamella 11 that the specific refractive index that can design us needs distributes, in like manner can obtain the refraction index profile of impedance matching layer lamella, thereby obtain the refraction index profile of whole super material panel.
Among the present invention, the structural design of core layer lamella can obtain by Computer Simulation (CST emulation), and is specific as follows:
That (1) determines the first metal micro structure adheres to base material (the first base material).During this was bright, the first prebasal plate of described the first base material adopted identical FR-4 composite material to make with the first metacoxal plate, and described FR-4 composite material is made has a predetermined dielectric constant, and for example dielectric constant is 3.3 FR-4 composite material.
(2) size of definite super material cell.The size of super material cell is obtained by the centre frequency of antenna, 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, described super material cell D is the square platelet that 2.5mm, thickness HD are 0.818mm for long CD and wide KD as shown in Figure 2.
(3) determine material and the topological structure of metal micro structure.Among the present invention, the material of metal micro structure is copper, and the topological structure of metal micro structure is the alabastrine metal micro structure in plane shown in Figure 5, and its live width W is consistent everywhere; Topological structure herein refers to the basic configuration that topology develops.
(4) determine the topology parameter of metal micro structure.As shown in Figure 5, among the present invention, 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.Among the present invention, 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 8, 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.Among the present invention, WL gets 0.1mm, and W gets 0.3mm, and super material cell is of a size of the long and wide 2.5mm that is, thickness is 0.818mm, and this moment, the topology parameter of metal micro structure only had a and two variablees of b.The passing through such as Fig. 8 of the topology of metal micro structure corresponding to a certain characteristic frequency (for example 12.5GHZ), can obtain a continuous variations in refractive index scope to differentiation mode shown in Figure 9.
Particularly, the differentiation of the topology of described metal micro structure comprises two stages (basic configuration that topology develops is metal micro structure shown in Figure 5):
Phase I: according to developing restrictive condition, in the situation that the b value remains unchanged, a value is changed to maximum 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 maximum of a is (CD-WL), i.e. 2.5-0.1mm, and then the maximum of a is 2.4mm.Therefore, in the phase I, the differentiation of the topology of metal micro structure as shown in Figure 8, 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 2.4mm, and width W is 0.3mm.In the phase I, along with the differentiation of the topology of metal micro structure, the refractive index of the super material cell corresponding with it increase continuously ((respective antenna one characteristic frequency), when frequency is 12.5GHZ, the minimum value n of the refractive index that super material cell is corresponding MinBe 1.91.
Second stage: according to developing restrictive condition, when a was increased to maximum, a remained unchanged; At this moment, b is increased continuously maximum 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 maximum of b is (CD-WL-2W), i.e. 2.5-0.1-2*0.3mm, and then the maximum of b is 1.8mm.Therefore, in second stage, the differentiation of the topology of metal micro structure as shown in Figure 9, 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 that 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 maximum of b is 1.8mm.At this moment, the first metal wire and the second metal wire length are 2.4mm, and width is 0.3mm, and the length of the first metal branch and the second metal branch is 1.8mm, and width is 0.3mm.In second stage, 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 12.5GHZ, and the maximum n of the refractive index that super material cell is corresponding MaxBe 5.6.
The variations in refractive index scope 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 maximum is too little, then changes WL and W, and again emulation is until obtain the variations in refractive index scope that we need.
According to formula (1), after a series of super material cell that emulation is obtained is arranged according to its corresponding refractive index (in fact being exactly a plurality of first artificial micro-structural arranging on the first base material of different topology shape), can obtain core layer lamella of the present invention.
In like manner, can obtain impedance matching layer lamella of the present invention.
Figure 10 is the structural representation of the another kind of embodiment of the present invention.In the present embodiment, different is, and super material panel 100 is divided between 1000, four cell boards 1000 of four cell boards by hinged mode, can fold.Be conducive to like this processing and manufacturing and the installation and maintenance of radome, the dismountable connection of a plurality of cell boards, perhaps a plurality of cell boards can fold by rotating connected mode, only occupy very little area.The formation of cell board 1000 can have following dual mode:
(1) isolate in flakes after the whole processing, this mode is fit to the super material flat board of less area.
(2) design the overall structure parameter of super material panel, before manufacturing, be about to it and be divided into a plurality of cell boards 1000, to the independent processing and manufacturing of these cell boards.This mode is fit to superhuge super material panel processing very much.
Cell board preferably adopts same size, so conveniently stacks, and the quantity of cell board can be set as required.
A plurality of cell board 1000 dismountable connections, such as can be that bolt connects, bonding, buckle connection etc.In the present embodiment, preferably, a plurality of cell boards 1000 can fold by rotating connected mode.At different application scenarioss, can carry out conformal design to the shape of radome.The radome of illustrating among the figure be shaped as tabular, when actual design, also can come according to the real needs of foundation antenna the shape of designing antenna cover, such as being designed to spherical shape or with the shape (conformal radome) of antenna pattern coupling etc., the present invention is not restricted this.
The present invention also provides a kind of beam aerial system, comprises antenna and aforesaid direction propagation radome, and described direction propagation radome covers on the described antenna.The particular content of direction propagation radome repeats no more as mentioned above herein.
Above-described embodiment is the better execution mode of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not run counter to change, the modification done under Spirit Essence of the present invention and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.

Claims (10)

1. direction propagation radome, it is characterized in that, described direction propagation radome covers on the antenna, described direction propagation radome comprises super material panel, the feed of described antenna and described super material panel opposition arrange, and the line between the center of the feed equivalent point of described antenna and described super material panel is perpendicular to described super material panel;
Described super material panel comprises core layer, described core layer comprises a plurality of core layer lamellas that thickness is identical and refraction index profile is identical, described core layer lamella comprises the first base material of sheet and is arranged on a plurality of first artificial micro-structural on the first base material that the refraction index profile of described core layer lamella satisfies following formula:
n i ( r ) = n min + 1 d ( a i 2 + s 2 - r 2 + s 2 ) ;
a i + 1 2 + s 2 - a i 2 + s 2 = λ ;
Wherein, i represents core layer lamella segments, i=1 represent core layer lamella first paragraph, i=2 represent core layer lamella second segment ..., i=p represents the p section of core layer lamella, the center of the most close core layer lamella of described core layer lamella first paragraph;
n i(r) radius is the refractive index value at r place on the expression core layer lamella i section;
n MinThe minimum value of the refractive index of expression core layer lamella;
λ represents electromagnetic wavelength;
R represents that any point is apart from the distance at core layer lamella center on the core layer lamella;
S is that the feed equivalent point is to the vertical range of super material panel;
a iThe maximum at expression core layer lamella i segment distance core layer lamella center;
D represents the thickness of super material panel.
2. direction propagation radome according to claim 1 is characterized in that, described the first base material comprises the first prebasal plate and first metacoxal plate of sheet, and described a plurality of first artificial micro-structural is folded between the first prebasal plate and the first metacoxal plate.
3. direction propagation radome according to claim 2 is characterized in that, the thickness of described core layer lamella is 0.818mm, and wherein, the thickness of the first prebasal plate and the first metacoxal plate is 0.4mm, and the thickness of a plurality of the first artificial micro-structurals is 0.018mm.
4. direction propagation radome according to claim 1, it is characterized in that, described super material panel also comprises the impedance matching layer that is symmetrically distributed in the core layer both side surface, described impedance matching layer comprises a plurality of impedance matching layer lamellas that thickness is identical, described impedance matching layer lamella comprises the second base material of sheet and is arranged on a plurality of second artificial micro-structural on the second base material that the refraction index profile of described impedance matching layer lamella satisfies following formula:
n j ( r ) = n min j m * n ( r ) m - j m ;
λ＝(n max-n min)*(d+2*d1)；
Wherein, j represents the numbering of impedance matching layer lamella, apart from the m that is numbered of core layer impedance matching layer lamella farthest, reduce successively to core layer direction numbering, the impedance matching layer lamella nearest apart from core layer be numbered 1;
Above-mentioned n MaxAnd n MinThe maximum and the minimum value that represent respectively the refractive index of core layer lamella;
R represents that any point is to the distance at its center on the impedance matching layer lamella;
λ represents electromagnetic wavelength;
D1 is distributed in the wherein thickness of the impedance matching layer of a side surface of core layer;
D is the thickness of core layer.
5. direction propagation radome according to claim 4 is characterized in that, described the second base material comprises the second prebasal plate and second metacoxal plate of sheet, and described a plurality of second artificial micro-structural is folded between the second prebasal plate and the second metacoxal plate.
6. direction propagation radome according to claim 5 is characterized in that, the thickness of described impedance matching layer lamella is 0.818mm, and wherein, the thickness of the second prebasal plate and the second metacoxal plate is 0.4mm, and the thickness of a plurality of the second artificial micro-structurals is 0.018mm.
7. direction propagation radome according to claim 6, it is characterized in that, the described first artificial micro-structural and the second artificial micro-structural be the metal micro structure for being made of copper cash or silver-colored line all, and described metal micro structure is attached to respectively on the first base material and the second base material by etching, plating, brill quarter, photoetching, electronics is carved or ion is carved method.
8. direction propagation radome according to claim 7, 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.
9. direction propagation radome according to 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.
10. a beam aerial system comprises antenna, it is characterized in that, comprises that also described direction propagation radome covers on the described antenna such as the described direction propagation radome of claim 1 to 9 any one.
CN201210093294.8A 2012-03-31 2012-03-31 Direction propagation antenna house and beam aerial system Active CN103367904B (en)

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