CN102856654B - Wideband-elimination metamaterial and wideband-elimination metamaterial radome thereof and antenna system - Google Patents
Wideband-elimination metamaterial and wideband-elimination metamaterial radome thereof and antenna system Download PDFInfo
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- CN102856654B CN102856654B CN201210268608.3A CN201210268608A CN102856654B CN 102856654 B CN102856654 B CN 102856654B CN 201210268608 A CN201210268608 A CN 201210268608A CN 102856654 B CN102856654 B CN 102856654B
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Abstract
The present invention relates to a kind of wideband-elimination metamaterial, it comprises a metamaterial sheet, described metamaterial sheet comprises the structure sheaf that medium substrate and two is attached to two apparent surfaces of described medium substrate respectively, each structure sheaf comprises multiple in orthohexagonal metal micro structure, two metal micro structures being positioned at the correspondence position of described medium substrate in described two structure sheafs partner, in each structure sheaf, two adjacent edges of wantonly two adjacent metal micro structures are parallel to each other, thus make the pitch smaller at the center of wantonly two adjacent metal micro structures, the electromagnetic wave in the high band of ultra-wide can be suppressed like this and make Meta Materials have wideband-elimination function, and for the electromagnetic wave of low-frequency range, its wave transmission rate is high, and reflect little, there is good wave penetrate capability.The invention still further relates to wideband-elimination metamaterial radome and antenna system that a kind of wideband-elimination metamaterial thus makes.
Description
Technical field
The metamaterial antenna cover that the present invention relates to Meta Materials and be made up of it and antenna system, more particularly, relate to a kind of futuramic wideband-elimination metamaterial and the wideband-elimination metamaterial radome be made up of it and antenna system.
Background technology
Meta Materials is a kind of artificial composite structure material with extraordinary physical property not available for natural material.Current, people on substrate periodically arrangement there is certain geometrical shape artificial micro-structure to form Meta Materials.Due to dielectric constant and/or the magnetic permeability that the geometry of artificial micro-structure and size and arrangement can be utilized to change Meta Materials spatial points, it is made to produce the electromagnetic response of expection, to control electromagnetic wave propagation, so, be with a wide range of applications in multiple field, become various countries scientific research personnel and fall over each other one of hot fields studied.Particularly by Meta Materials as the electromagnetic wave transparent material with good wave penetrate capability, and be used for making the existing quite research of radome.
Traditionally, many employings dielectric constant and loss angle tangent is low, mechanical strength is high material when manufacturing radome, as high molecular polymers such as fiberglass, epoxy resin and ABS and UPVC.Although the radome be made up of these materials can make antenna from the impact of extraneous adverse circumstances, and to the transmission of antenna and/or the electromagnetic loss of reception less, but because exceedingly high irdome is normally with by this radome, during for naval vessel radar system (its operating frequency is generally 3GHz), resonance can be produced in some frequency range (as X-band or higher frequency), and there is a lot of graing lobe when high frequency, (English is RadarCrossSection to make the RCS of some frequency and incidence angle, be called for short RCS) increase, such radar Organization of African Unity easily exposes.
Summary of the invention
The technical problem to be solved in the present invention is, provide a kind of there is good wave penetrate capability wideband-elimination metamaterial and the wideband-elimination metamaterial radome be made up of it and antenna system.
The technical solution adopted for the present invention to solve the technical problems is: a kind of wideband-elimination metamaterial, it comprises at least one metamaterial sheet, described metamaterial sheet comprises the structure sheaf that medium substrate and two is attached to two apparent surfaces of described medium substrate respectively, each structure sheaf comprises multiple in orthohexagonal metal micro structure, two metal micro structures being positioned at the correspondence position of described medium substrate in described two structure sheafs partner, in each structure sheaf, two adjacent edges of wantonly two adjacent metal micro structures are parallel to each other, each metal micro structure comprise six end to end and form the metal wire sections of closed-loop, the length of described six strip metal line segments is equal, width is equal, width is 0.13 ~ 0.20mm, spacing between two metal wire sections be parallel to each other in each wantonly two adjacent metal micro structures is equal, be 0.25 ~ 0.32mm, the external radius of a circle of each metal micro structure is 2.72 ~ 2.95mm.
Preferably, the external radius of a circle of each metal micro structure is 2.85mm; Each metal wire sections of each metal micro structure width is 0.17mm, thickness is 0.018mm; The spacing of two metal wire sections be parallel to each other of wantonly two adjacent metal micro structures is 0.28mm; The thickness of described medium substrate is 9mm.
Preferably, described medium substrate is made up of polytetrafluoroethylene (F4B).
Preferably, the metal wire sections of each metal micro structure is made of copper.
A kind of wideband-elimination metamaterial radome, it comprises at least one metamaterial sheet, described metamaterial sheet comprises the structure sheaf that medium substrate and two is attached to two apparent surfaces of described medium substrate respectively, each structure sheaf comprises multiple in orthohexagonal metal micro structure, two metal micro structures being positioned at the correspondence position of described medium substrate in described two structure sheafs partner, and in each structure sheaf, two adjacent edges of wantonly two adjacent metal micro structures are parallel to each other.
A kind of antenna system, comprise antenna and be arranged at the wideband-elimination metamaterial radome on the electromagnetic wave propagation direction of the reception of described antenna and/or transmitting, described wideband-elimination metamaterial radome comprises at least one metamaterial sheet, described metamaterial sheet comprises the structure sheaf that medium substrate and two is attached to two apparent surfaces of described medium substrate respectively, each structure sheaf comprises multiple in orthohexagonal metal micro structure, two metal micro structures being positioned at the correspondence position of described medium substrate in described two structure sheafs partner, in each structure sheaf, two adjacent edges of wantonly two adjacent metal micro structures are parallel to each other.
Wideband-elimination metamaterial of the present invention and the wideband-elimination metamaterial radome be made up of it and antenna system have following beneficial effect: because two of its metamaterial sheet all has multiple in orthohexagonal metal micro structure on the surface, and two adjacent edges of wantonly two adjacent metal micro structures are parallel to each other, thus make the pitch smaller at the center of wantonly two adjacent metal micro structures, the electromagnetic wave in the high band of ultra-wide can be suppressed and there is wideband-elimination function, and for the electromagnetic wave of low-frequency range, its wave transmission rate is high, and reflect little, there is good wave penetrate capability.
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 a metamaterial sheet of wideband-elimination metamaterial of the present invention;
Fig. 2 is the floor map of the structure sheaf of metamaterial sheet described in Fig. 1;
Fig. 3 is the enlarged diagram of a metal micro structure for structure sheaf described in pie graph 2;
Fig. 4 is the response curve of the reflection coefficient S1 of the metamaterial unit sample that in Fig. 1, is rectangle and transmission coefficient S2 with electromagnetic frequency change;
Fig. 5 is the schematic diagram of wideband-elimination metamaterial radome of the present invention and antenna system.
The name that in figure, each label is corresponding is called:
10 metamaterial sheet, 12 medium substrates, 14 structure sheafs, 16 metal micro structures, 18 metal dangerous sections, 19 metamaterial unit, 20 antenna systems, 22 antennas, 24 wideband-elimination metamaterial radomes
Embodiment
The term such as " lamella ", " plate ", " layer " in the present invention 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, different because of application demand.For simplicity's sake, " lamella ", " plate " in present embodiment, " layer " are all illustrated with plane.
As shown in Figure 1, wideband-elimination metamaterial of the present invention comprises at least one metamaterial sheet 10, and described metamaterial sheet 10 comprises the structure sheaf 14 that a medium substrate 12 and two is attached to two apparent surfaces of described medium substrate 12 respectively.Described medium substrate 12 is made up of polymeric material, ceramic material, ferroelectric material, ferrite material or ferromagnetic material etc., as epoxy resin fiberglass cloth plate (i.e. FR4 plate), polyfluortetraethylene plate (i.e. F4B plate), high density polyethylene (HDPE) plate (i.e. HDPE plate) or acrylonitrile-butadiene-styrene (ABS) plate (i.e. ABS plate) etc., its thickness is 8 ~ 11mm.
Please refer to Fig. 2, each structure sheaf 14 comprises multiple metal micro structure 16 be arranged in array.Each metal micro structure 16 is the plane (two dimension) with certain geometrical shape or three-dimensional (three-dimensional) structure that are made up of the metal wire sections of certain size, wherein, metal wire sections is made up of the such as conductive metal material such as copper, silver, its cross section can be flat or other arbitrary shapes, as cylindric.Two metal micro structures 16 being positioned at the correspondence position of described medium substrate 12 in described two structure sheafs 14 form pair of metal micro-structural 16.The geometry of the metal micro structure 16 on described two structure sheafs 14 is all identical with size, therefore is described for a metal micro structure 16 below.
As shown in Figure 3, each metal micro structure 16 is in regular hexagon, and the radius R of its circumscribed circle is 2.72 ~ 2.95mm.Each metal micro structure 16 comprise six end to end and form the metal wire sections 18 of closed-loop, the length of each metal wire sections 18 is equal, width is equal, and its width W is 0.13 ~ 0.20mm.Arbitrary metal wire sections 18 of each metal micro structure 16 is parallel with the metal wire sections 18 in adjacent metal micro-structural 16.The space D of two metal wire sections be parallel to each other 18 of wantonly two adjacent metal micro structures 16 is 0.25 ~ 0.32mm (as Fig. 2).
In same structure layer 14, if allow four straightways (as dotted line in figure) at the center by hithermost four metal micro structures 16 of connection form a rectangular region, then the center of the metal micro structure 16 between described four metal micro structures 16 is the center of described rectangular region; If be a unit pattern with the metal pattern being positioned at described rectangular region, then described structure sheaf 14 just can be regarded as and formed by multiple described unit pattern array, as shown in the figure, the long limit L1 of described rectangular region and minor face L2 is respectively: 8.6 ~ 9.2mm, 5.0 ~ 5.5mm.The unit pattern and two unit patterns being positioned at the correspondence position of described medium substrate 12 in described two structure sheafs 14 partner.
Please refer to Fig. 2 again, if the medium substrate part (its size equals above-mentioned rectangular region) at a pair unit pattern in described two structure sheafs 14 and place thereof is called a metamaterial unit 19 by us, then described metamaterial sheet 10 can be regarded as and formed by multiple described metamaterial unit 19 array.Generally, the physical dimension (equaling long limit L1 and the minor face L2 of described rectangular region) of each metamaterial unit 19 is with to set the electromagnetic wavelength responded as required relevant.
During actual fabrication, we can choose the PCB laminated sheet that one or two surface is all covered with metal forming, the metal forming on its two surface forms described multiple metal micro structure 16 by etching, and allow the center of the metal micro structure 16 of correspondence position align, thus form described two structure sheafs 14 on the surface at two of described PCB laminated sheet, described metamaterial sheet 10 can be obtained.In addition, described multiple first metal micro structure 16 also can adopt plating, bore quarters, photoetching, electronics quarter or ion quarter etc. mode formed.
In order to verify the response characteristic of described metamaterial sheet 10, we carry out emulation testing for a metamaterial unit 19 below.In described metamaterial unit 19, its long limit is
minor face is
also namely, the long limit L1 of described rectangular region is
minor face L2 is
described medium substrate 12 is F4B plate (relative dielectric constant ε
rbe 2.2, losstangenttanδ be 0.001), thickness is 9mm.Described two structure sheafs 14 are made up of Copper Foil, and thickness is 0.018mm, and also, the metal wire sections 18 of metal micro structure 16 is made of copper, and its thickness is 0.018mm; And the radius R of the circumscribed circle of metal micro structure 16 is 2.85mm, the width W of metal wire sections 18 is the space D of the adjacent metal line segment 18 that 0.17mm, wantonly two is parallel to each other is 0.28mm.Through emulation obtain the reflection coefficient S1 of described metamaterial unit 19 sample and transmission coefficient S2 with electromagnetic frequency change response curve as shown in Figure 4.As seen from the figure, when low-frequency range, the wave transparent coefficient S 2 of described sample close to 1, reflection coefficient S1 is less, and in the high band of non-constant width, wave transparent coefficient S 2 close to 0, reflection coefficient S1 is close to 1, also namely low frequency time wave good, reflect little, in the high band (being greater than 4GHz) of ultra-wide, then suppress electromagnetic wave, form stopband.As can be seen here, wideband-elimination metamaterial of the present invention not only can suppress the electromagnetic wave in the high band of ultra-wide and have wideband-elimination function, and for the electromagnetic wave of low-frequency range, its wave transmission rate is high, and reflects little, has good wave penetrate capability.
In addition, according to actual needs, we are by hot pressing tabular metamaterial sheet 10 or plate for polylith metamaterial sheet 10 be stitched together and form the wideband-elimination metamaterial in the various shape such as bending, spherical, also soft medium substrate 12 can be used to carry out obtained described metamaterial sheet 10, to manufacture the wideband-elimination metamaterial in arbitrary shape.Described wideband-elimination metamaterial can comprise metamaterial sheet 10 described in multilayer, and these metamaterial sheet 10 both along mutually bonding perpendicular to the direct forward and backward surface, direction of sheet surfaces and be superimposed, also can arrange and fit together by these metamaterial sheet 10 equally spacedly.
Please refer to Fig. 5, is the schematic diagram of wideband-elimination metamaterial radome of the present invention and antenna system.Described antenna system 20 comprises antenna 22 and the wideband-elimination metamaterial radome 24 for the protection 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 made up of above-mentioned antenna, and its feeding classification can be coaxial line, slot-coupled, microstrip line etc.Described wideband-elimination metamaterial radome 24 is positioned at described antenna 22 and receives and/or on the electromagnetic wave propagation direction of launching.Described wideband-elimination metamaterial radome 24 comprises metamaterial sheet 10 described at least one, and other are with the above associated description to described metamaterial sheet 10.And according to actual needs, described wideband-elimination metamaterial radome 24 can make arbitrary shape, as with as described in the conformal shape of antenna 22, and the metamaterial sheet 10 of polylith plane or curved surface can be stitched together by the mode of mechanical connection, welding or bonding and form large-scale metamaterial antenna cover, also the metamaterial sheet 10 of polylith plane or curved surface can be superimposed and form the higher metamaterial frequency selection radome of thicker mechanical strength.As from the foregoing, metamaterial frequency selection radome of the present invention and antenna system not only can suppress the electromagnetic wave in the high band of ultra-wide and have wideband-elimination function, and for the electromagnetic wave of low-frequency range, wave transmission rate is high, and reflects little, has good wave penetrate capability.In addition, in order to protect described wideband-elimination metamaterial radome 24, acid-proof, anticorrosion, wear-resistant etc. protective layer can be applied in its surface.
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, under the prerequisite not departing from basic thought of the present invention, some improvements and modifications can also be made, and these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. a wideband-elimination metamaterial, comprise at least one metamaterial sheet, described metamaterial sheet comprises the structure sheaf that medium substrate and two is attached to two apparent surfaces of described medium substrate respectively, each structure sheaf comprises multiple in orthohexagonal metal micro structure, two metal micro structures being positioned at the correspondence position of described medium substrate in described two structure sheafs partner, in each structure sheaf, two adjacent edges of wantonly two adjacent metal micro structures are parallel to each other, each metal micro structure comprise six end to end and form the metal wire sections of closed-loop, the length of described six strip metal line segments is equal, width is equal, width is 0.13 ~ 0.20mm, spacing between two metal wire sections be parallel to each other in each wantonly two adjacent metal micro structures is equal, be 0.25 ~ 0.32mm, the external radius of a circle of each metal micro structure is 2.72 ~ 2.95mm.
2. wideband-elimination metamaterial according to claim 1, is characterized in that, the external radius of a circle of each metal micro structure is 2.85mm; Each metal wire sections of each metal micro structure width is 0.17mm, thickness is 0.018mm; The spacing of two metal wire sections be parallel to each other of wantonly two adjacent metal micro structures is 0.28mm; The thickness of described medium substrate is 9mm.
3. wideband-elimination metamaterial according to claim 1, is characterized in that, described medium substrate is made up of polytetrafluoroethylene (F4B).
4. wideband-elimination metamaterial according to claim 1, is characterized in that, the metal wire sections of each metal micro structure is made of copper.
5. a wideband-elimination metamaterial radome, is characterized in that, the wideband-elimination metamaterial of described wideband-elimination metamaterial radome according to any one of claim 1-4 is made.
6. an antenna system, comprise antenna, it is characterized in that, described antenna system also comprises the wideband-elimination metamaterial radome on the electromagnetic wave propagation direction being arranged at the reception of described antenna and/or transmitting, and described wideband-elimination metamaterial radome is the wideband-elimination metamaterial radome described in claim 5.
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| CN103219568B (en) * | 2013-05-07 | 2015-04-08 | 西安电子科技大学 | Broadband frequency selector |
| CN104934716A (en) * | 2014-03-18 | 2015-09-23 | 深圳光启创新技术有限公司 | Bandstop wave-transparent metamaterial, antenna cover and antenna system |
| CN104037489A (en) * | 2014-03-26 | 2014-09-10 | 杭州电子科技大学 | 60GHz on-chip antenna based on artificial magnetic conductor structure |
| CN106033845B (en) * | 2015-03-20 | 2021-06-04 | 深圳光启高等理工研究院 | Metamaterial and manufacturing method of conductive microstructure of metamaterial |
| CN107171072A (en) * | 2017-06-14 | 2017-09-15 | 中国铁塔股份有限公司长春市分公司 | A kind of antenna house |
| CN108199134B (en) * | 2018-01-11 | 2020-03-27 | 淮阴师范学院 | Multi-frequency antenna device |
| CN110212297A (en) * | 2019-05-28 | 2019-09-06 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Airborne lightning protection antenna cover |
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| US6985118B2 (en) * | 2003-07-07 | 2006-01-10 | Harris Corporation | Multi-band horn antenna using frequency selective surfaces |
| TWI438959B (en) * | 2010-06-11 | 2014-05-21 | Nat Univ Tsing Hua | High frequency filter |
| CN202034468U (en) * | 2011-04-02 | 2011-11-09 | 中国计量学院 | Terahertz wave filter with cyclical plumblossom-shaped arrayed and regularly-hexagonal hole hollow-out structure |
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