CN103579772A - Metamaterial plate and metamaterial antenna housing and antenna system made of metamaterial plate - Google Patents
Metamaterial plate and metamaterial antenna housing and antenna system made of metamaterial plate Download PDFInfo
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- CN103579772A CN103579772A CN201210268771.XA CN201210268771A CN103579772A CN 103579772 A CN103579772 A CN 103579772A CN 201210268771 A CN201210268771 A CN 201210268771A CN 103579772 A CN103579772 A CN 103579772A
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Abstract
The invention relates to a metamaterial plate which comprises a metamaterial piece layer. The metamaterial piece layer comprises two base plates and a structural layer arranged between the base plates, wherein the structural layer comprises multiple metal microstructures. Each metal microstructure comprises a circular ring, two first metal straight-line segments connected to the circular ring and located in the same diameter direction of the circular ring and two paralleled second metal straight-line segments perpendicularly connected to the first metal straight-line segments respectively. The first metal straight-line segments are respectively connected to midpoints of the corresponding second metal straight-line segments, accordingly the reflection ratio of the first metal straight-line segments to electromagnetic waves is decreased, the wave-transparent performance is improved, and the influence on radiation waves of an antenna is reduced. Therefore, the original gain of the antenna and the major lobe form of a directional diagram can be maintained. The invention further provides a metamaterial antenna housing and an antenna system made of the metamaterial plate.
Description
Technical field
The present invention relates to super material and the radome of being made by it and antenna system, more particularly, relate to a kind of super material sheet material of the metamaterial structure cell formation by brand-new design and super material radome and the antenna system of being made by it.
Background technology
Super material is a kind of artificial composite structure with the not available extraordinary physical property of natural material.Current, people form super material by arrange the super material metal micro-structural with certain geometrical shape consisting of metal wire sections on substrate.Due to dielectric constant and/or the magnetic permeability that can utilize geometry and the size of metal micro structure and arrange to change super material space each point, make it produce the electromagnetic response of expection, to control electromagnetic wave propagation, so, in a plurality of fields, be with a wide range of applications, become various countries scientific research personnel and fall over each other one of hot fields of research.And making of novel super material aspect radome, because can significantly improving the wave penetrate capability of radome, it day by day by researcher, is paid close attention to.
Traditionally, dielectric constants and loss angle tangent is low, mechanical strength the is high materials of adopting while manufacturing radome, as high molecular polymers such as fiberglass, epoxy resin and ABS and UPVC more.Although this radome not only can make antenna avoid the impact of extraneous adverse circumstances, and less to the electromagnetic loss of the transmission of antenna and/or reception, but the development along with technology, wave transparent efficiency to radome is had higher requirement, and require reflection still less, to reduce as much as possible the impact on antenna electric performance.
Summary of the invention
The technical problem to be solved in the present invention is, a kind of the have super material sheet material of good wave penetrate capability and super material radome and the antenna system of being made by it are provided.
The technical solution adopted for the present invention to solve the technical problems is: a kind of super material sheet material, it comprises at least one super sheet of material, described super sheet of material comprises two substrates that combine and is placed in the structure sheaf between described two substrates, described structure sheaf comprises a plurality of metal micro structures, each metal micro structure comprises an annulus, two are connected in described annulus and are positioned at the second metal straight line segment that the first metal straight line segment and two in the same diametric(al) of described annulus is vertically connected in respectively described two first metal straight line segments and is parallel to each other, described two first metal straight line segments are connected to the mid point of corresponding the second metal straight line segment.
Preferably, the geometry of described a plurality of metal micro structures and size are all identical and be arranged in array, and the bearing of trend of two first metal straight line segments of each metal micro structure is identical.
Preferably, the distance in the center of circle of adjacent two nearest annulus all equates, is 9.9～10.4mm.
Preferably, the outer diameter of a circle of the annulus of each metal micro structure all equates, is 9.3～9.7mm.
Preferably, the identical length of two second metal straight line segments of each metal micro structure etc., the distance that is 0.8～1.3mm, two second metal straight line segments all equates, is 3.7～4.1mm.
Preferably, the width of the annulus of each metal micro structure and two first metal straight line segments, the second metal straight line segment all equates, is 0.08～0.11mm.
Preferably, the distance in the center of circle of adjacent two nearest annulus equals 10mm; The outer diameter of a circle of the annulus of each metal micro structure is that distance that the length of 9.6mm, two second metal straight line segments is 1mm, two second metal straight line segments is that the width of 3.8mm, annulus and two first, second metal straight line segments is 0.1mm, thickness is 0.018mm; The thickness of described two substrates
be 2mm.
Preferably, described two substrates is made by acrylonitrile-butadiene-styrene copolymer (ABS); Described metal micro structure is made of copper.
A kind of super material radome, comprise at least one super sheet of material, described super sheet of material comprises two substrates that combine and is placed in the structure sheaf between described two substrates, described structure sheaf comprises a plurality of metal micro structures, each metal micro structure comprises that an annulus, two is connected in described annulus and is positioned at the second metal straight line segment that the first metal straight line segment and two in the same diametric(al) of described annulus is vertically connected in respectively described two first metal straight line segments and is parallel to each other, and described two first metal straight line segments are connected to the mid point of corresponding the second metal straight line segment.
A kind of antenna system, comprise antenna and be arranged at the super material radome in the electromagnetic wave propagation direction of described antenna reception and/or transmitting, described super material radome comprises at least one super sheet of material, described super sheet of material comprises two substrates that combine and is placed in the structure sheaf between described two substrates, described structure sheaf comprises a plurality of metal micro structures, each metal micro structure comprises an annulus, two are connected in described annulus and are positioned at the second metal straight line segment that the first metal straight line segment and two in the same diametric(al) of described annulus is vertically connected in respectively described two first metal straight line segments and is parallel to each other, described two first metal straight line segments are connected to the mid point of corresponding the second metal straight line segment.
The super material sheet material of the present invention and super material radome and the antenna system by it, made have following beneficial effect: owing to being provided with a plurality of metal micro structures with certain geometrical shape between two substrates, thereby make described super material sheet material to electromagnetic reflection diminish, wave penetrate capability improves, there is good electromagnetic performance, reduced the impact on the radiation efficiency of antenna.
Accompanying drawing explanation
Below in conjunction with the drawings and the specific embodiments, the invention will be further described.
Fig. 1 is the structural representation of the super material sheet material of the present invention;
Fig. 2 is the plane enlarged diagram of the structure sheaf in Fig. 1;
Fig. 3 is the enlarged diagram of a metal micro structure in Fig. 2;
Fig. 4 is the comparison diagram that the transmission coefficient of the pure ABS cell block of the super material cell sample of in Fig. 1 and same size changes in a certain frequency range;
Fig. 5 is the comparison diagram that the reflection coefficient of the pure ABS cell block of the super material cell sample of in Fig. 1 and same size changes in a certain frequency range;
Fig. 6 is the schematic diagram of the super material radome of the present invention and antenna system.
The name that in figure, each label is corresponding is called:
10 surpass sheet of material, 12 substrates, 14 structure sheafs, 16 metal micro structures, 162 annulus, 164 first metal straight line segments, 166 second metal straight line segments, 18 surpass material cell, 20 antenna systems, 22 antennas, 24 surpass material radome, 242 fixed frames, 244 surpass material sheet material
Embodiment
The terms such as " sheet material " in the present invention, " lamella ", " plate ", " layer " had both referred to the layer material of the arbitrary shapes such as plane, curved surface, the conical surface, sphere, shaped face, also can comprise soft film, because of application demand difference.For simplicity's sake, " sheet material " in present embodiment, " lamella ", " plate ", " layer " are all illustrated with plane.
As shown in Figure 1, the super material sheet material of the present invention comprises at least one super sheet of material 10, and described super sheet of material 10 comprises two substrates that combine 12 and is placed in the structure sheaf 14 between described two substrates 12.Described two substrates 12 is made by polymeric material, ceramic material, ferroelectric material, ferrite material or ferromagnetic material etc., as epoxy resin fiberglass cloth (being FR4), polytetrafluoroethylene (English Polytetrafluoroethene by name, abbreviation F4B), high density polyethylene (HDPE) (English High Density Polyethylene by name, be called for short HDPE) or acrylonitrile-butadiene-styrene copolymer (English Acrylonitrile Butadiene Styrene by name, is called for short ABS) etc.The thickness of described two substrates 12 both can equate, also can not wait, and in present embodiment, the thickness of described two substrates 12 equates, is 1.6～2.3mm (PLSCONFM).
Please refer to Fig. 2, described structure sheaf 14 comprises a plurality of metal micro structures that are arranged in array 16, the pattern of the grid being formed by dotted line as being positioned in figure.Substrate 12 parts at each metal micro structure 16 and place thereof are called to a super material cell 18, as being delimited by a dashed line the square block of formation in Fig. 1.Like this, described super sheet of material 10 can be regarded as by a plurality of described super material cell 18 arrays and forms.Generally, the physical dimension of each super material cell 18 is relevant with the electromagnetic wavelength of setting as required response, and in present embodiment, the length of described super material cell 18 equates with width, is equal to 9.9～10.4mm (equaling the length of L1 in Fig. 3).Also, the distance at adjacent two nearest metal micro structure 16 centers is 9.9～10.4mm.
Each metal micro structure 16 is the plane with certain geometrical shape (two dimension) or three-dimensional (three-dimensional) structures that the metal wire sections by certain size forms, wherein, metal wire sections is by making as metallic conduction materials such as copper, silver, its cross section can be for flat or other arbitrary shapes, as cylindric.The geometry of described a plurality of metal micro structure 16 and size are all identical, therefore take below a metal micro structure 16, describe as example.As shown in Figure 3, described metal micro structure 16 consists of the metal wire sections with flat cross section, and it comprises that an annulus 162, two is connected in described annulus 162 and is positioned at the second metal straight line segment 166 that the first metal straight line segment 164 and two in the same diametric(al) of described annulus 162 is vertically connected in respectively described two first metal straight line segments 164 and is parallel to each other.Described two first metal straight line segments 164 are connected to the mid point of corresponding the second metal straight line segment 166.The outer diameter of a circle of described annulus 162 is equal to 2R, and 2R is 9.3～9.7mm.The length of described two second metal straight line segments 166 is equal to L2, and L2 is 0.8～1.3mm.The distance of described two second metal straight line segments 166 is equal to D, and D is 3.7～4.1mm.The width of described annulus 162 and described two first, second metal straight line segments 164,166 is equal to W, W=0.08～0.11mm, and thickness also equates, is 0.016～0.019mm.As from the foregoing, described metal micro structure 16 take perpendicular to the plane at its place (being also described substrate 12) the straight line by described metal micro structure 16 center (being the center of circle of described annulus 162) as axle clockwise or be rotated counterclockwise after 180 degree or 360 are spent and all can overlap with the metal micro structure 16 of initial position, and the bearing of trend of two first metal straight line segments 164 of each metal micro structure 16 is identical, and the distance in the center of circle of adjacent two nearest annulus 162 all equates, be also 9.9～10.4mm.
During design, select different raw materials to make the substrate 12 of different-thickness, and regulate the diameter 2R of the annulus 162 of metal micro structure 16, the width W of the length L 2 of two second metal wire sections 166, distance D, annulus 162 and two first, second metal wire sections 164,166 and thickness and metal micro structure 16 on substrate 12 arrange and the distance (i.e. the distance in the center of circle of two adjacent two annulus 162 recently) at adjacent two nearest metal micro structure 16 centers etc. obtain good to the electromagnetic wave permeability of certain frequency range, reflect little super sheet of material 10.
During actual fabrication, we can choose two substrates of being made by previous materials, be generally PCB laminated sheet, a surface sand-blasting of a PCB laminated sheet therein, and be covered with metal forming thereon as Copper Foil, then by this surperficial metal forming of chemical etching, form described a plurality of metal micro structure 16, do not have the PCB laminated sheet of metal forming to be formed with on the PCB laminated sheet of a plurality of metal micro structures 16 described in being pressed together on another piece, and allow described a plurality of metal micro structure 16 between described two PCB laminated sheets, thereby make described super sheet of material 10.In addition, described a plurality of metal micro structure 16 also can adopt photoetching, bore to carve, electronics is carved, ion is carved or the mode such as plating forms.
According to actual needs, described super material sheet material can comprise super sheet of material 10 described in multilayer, and these super sheet of material 10 both can be along the direction perpendicular to sheet surfaces direct forward and backward surface mutually bonding and be superimposed, also these super sheet of material 10 can be arranged and fitted together equally spacedly.
In order to verify the electromagnetic performance of described super sheet of material 10, below we take a super material cell 18 and carry out emulation testing as sample.In described super material cell 18, its length and width are equal to 10mm (be the L1=10mm in Fig. 3, and the distance at adjacent two nearest metal micro structure 16 centers being 10mm); Described substrate 12 is made by ABS (its relative dielectric constant ε r is that 2.8 (8～18GHz), loss angle tangent tand are 0.01 (8～18GHz)),
thickness is 2mm; Described metal micro structure 16 is made of copper (being also that described structure sheaf 14 is made by Copper Foil), and the outer diameter of a circle 2R of its annulus 162 is that distance D that the length L 2 of 9.6mm, two second metal straight line segments 166 is 1mm, two second metal straight line segments 166 is that the width W of 3.8mm, annulus 162 and two first, second metal straight line segments 164,166 is equal to 0.1mm, thickness is 0.018mm.Through emulation, obtain, the reflection coefficient of the pure ABS cell block of described sample and same size and transmission coefficient are distinguished as shown in Figure 4 and Figure 5 with the comparison diagram of electromagnetic frequency change.As seen from the figure, roughly in 7.1-8.5GHz frequency range, the transmission coefficient S21 reflection coefficient S1 that the transmission coefficient S2 of described sample is all greater than pure ABS cell block is all less than the reflection coefficient S11 of pure ABS cell block, also the wave penetrate capability that is described super sheet of material 10 is not only better than pure ABS, and reflection is less than pure ABS.As can be seen here, the super material sheet material of the present invention due between two substrates, be provided with the super material metal micro-structural with certain geometrical shape and size make its to electromagnetic reflection diminish, wave penetrate capability improves, thereby has good electromagnetic performance.
In addition, described super sheet of material 10 can be made arbitrariness shape according to actual needs.As being stitched together and forming the super material sheet material that is the various shapes such as crooked, spherical by the super sheet of material 10 of hot pressing tabular or by the plate super sheet of material 10 of polylith, also can make described super sheet of material 10 with soft substrate 12, to manufacture the super material sheet material that is arbitrary shape.
Please refer to Fig. 6, is the super material radome of the present invention and antenna system.Described antenna system 20 comprises antenna 22 and for the protection of the super material radome 24 of described antenna 22.Described antenna 22 can be the antenna of any types such as paster antenna, slot antenna, microstrip antenna, the antenna array that also can be formed by above-mentioned antenna, and its feeding classification can be coaxial line, slot-coupled, microstrip line etc.Described super material radome 24 comprises rounded fixed frame 242 and is fixed on the super material sheet material 244 of described fixed frame 242 1 sides.Described super material sheet material 244 is positioned in the electromagnetic wave propagation direction of described antenna 22 receptions and/or transmitting, with the super material sheet material of the present invention, repeats no more.Described super material radome 24 can be made arbitrary shape according to actual needs, as makes the shape conformal with antenna, and in present embodiment, described super material radome 24 is roughly dome-shaped, and is incorporated on described fixed frame 242 by the method for ultra-sonic welded.And according to the needs of described super material radome 24 load-bearing, can strengthen its mechanical strength by the super sheet of material of stack multilayer, make it more sturdy and durable.As from the foregoing, the corresponding certain working frequency range of the super material radome of the present invention and antenna system has good wave penetrate capability, and reflects little, to the free space Energy distribution of antenna, change little, can maintain original gain of antenna, main lobe axis shift is little, can guarantee its major lobe of directional diagram form.
In addition, in order to prevent the infringement of extraneous adverse circumstances to described super material radome 20, can coat overcoat on the inside and outside surface of described fixed frame 242 and super material sheet material 244, as epoxy modified silicone resin coating, prevent the corrosion of acid rain etc. and strengthen its resistance to wear.
The above is only some embodiments of the present invention and/or embodiment, should not be construed as limiting the invention.For those skilled in the art, not departing under the prerequisite of basic thought of the present invention, can also make some improvements and modifications, and these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a super material sheet material, comprise at least one super sheet of material, described super sheet of material comprises two substrates that combine and is placed in the structure sheaf between described two substrates, described structure sheaf comprises a plurality of metal micro structures, each metal micro structure comprises that an annulus, two is connected in described annulus and is positioned at the second metal straight line segment that the first metal straight line segment and two in the same diametric(al) of described annulus is vertically connected in respectively described two first metal straight line segments and is parallel to each other, and described two first metal straight line segments are connected to the mid point of corresponding the second metal straight line segment.
2. super material sheet material according to claim 1, is characterized in that, the geometry of described a plurality of metal micro structures and size are all identical and be arranged in array, and the bearing of trend of two first metal straight line segments of each metal micro structure is identical.
3. super material sheet material according to claim 2, is characterized in that, the distance in the center of circle of adjacent two nearest annulus all equates, is 9.9～10.4mm.
4. super material sheet material according to claim 1, is characterized in that, the outer diameter of a circle of the annulus of each metal micro structure all equates, is 9.3～9.7mm.
5. super material sheet material according to claim 1, is characterized in that, the identical length of two second metal straight line segments of each metal micro structure etc., and the distance that is 0.8～1.3mm, two second metal straight line segments all equates, is 3.7～4.1mm.
6. super material sheet material according to claim 1, is characterized in that, the width of the annulus of each metal micro structure and two first metal straight line segments, the second metal straight line segment all equates, is 0.08～0.11mm.
7. super material sheet material according to claim 1, is characterized in that, the distance in the center of circle of adjacent two nearest annulus equals 10mm; The outer diameter of a circle of the annulus of each metal micro structure is that distance that the length of 9.6mm, two second metal straight line segments is 1mm, two second metal straight line segments is that the width of 3.8mm, annulus and two first, second metal straight line segments is 0.1mm, thickness is 0.018mm; The thickness of described two substrates
be 2mm.
8. super material sheet material according to claim 1, is characterized in that, described substrate is made by acrylonitrile-butadiene-styrene copolymer (ABS); Described metal micro structure is made of copper.
9. a super material radome, is characterized in that, described super material radome super material sheet material described in any one in claim 1-8 is made.
10. an antenna system, comprise antenna, it is characterized in that, described antenna system also comprises the super material radome in the electromagnetic wave propagation direction that is arranged at described antenna reception and/or transmitting, and described super material radome is the super material radome described in claim 9.
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| CN201210268771.XA CN103579772A (en) | 2012-07-31 | 2012-07-31 | Metamaterial plate and metamaterial antenna housing and antenna system made of metamaterial plate |
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| CN103887609A (en) * | 2014-03-12 | 2014-06-25 | 清华大学 | Plane reflection array antenna |
| CN108847530A (en) * | 2018-06-22 | 2018-11-20 | 西安电子科技大学 | A kind of triangular pyramid has the super skin antenna cover of beam alignmetn function |
| CN109638468A (en) * | 2018-12-14 | 2019-04-16 | 北京无线电测量研究所 | A kind of transmission units, array and antenna loading delay line phase |
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