CN102832453B - Low-loss wave-transparent material, antenna housing and antenna system thereof - Google Patents
Low-loss wave-transparent material, antenna housing and antenna system thereof Download PDFInfo
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- CN102832453B CN102832453B CN201210220532.7A CN201210220532A CN102832453B CN 102832453 B CN102832453 B CN 102832453B CN 201210220532 A CN201210220532 A CN 201210220532A CN 102832453 B CN102832453 B CN 102832453B
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Abstract
The invention relates to a low-loss wave-transparent material, antenna housing and an antenna system of the low-loss wave-transparent material. The low-loss wave-transparent material comprises a first substrate and a second substrate which are made of non-metal materials, and a metal layer clamped between the first substrate and the second substrate, wherein a plurality of three-fork groove structures with three forks are carved on the metal layer; three forks of the three-fork groove structures have the same end point, and the inclined angle formed by the forks is 120 degrees. The invention also provides antenna housing and an antenna system. The low-loss wave-transparent material, the antenna housing and the antenna system of the low-loss wave-transparent material can work in an X wave band where wave-transparent efficiency is high. After the antenna housing is installed on the antenna, the radiating capacity of the antenna is reinforced, and then the gain is improved effectively. The bandwidth of the working frequency range of the wave-transparent material, the antenna housing and the antenna system can be changed by regulating sizes of the three-fork groove structure and the three-fork metal microstructure.
Description
Technical field
The present invention relates to radome, more particularly, relate to low-loss electromagnetic wave transparent material and radome thereof and antenna system.
Background technology
Generally, antenna system all can be provided with radome.The object of radome protects antenna system from the impact of wind and rain, ice and snow, sand and dust and solar radiation etc., makes antenna system service behaviour more stable, reliable.Alleviate the wearing and tearing of antenna system, corrosion and aging simultaneously, increase the service life.But radome is the barrier before antenna, can produces aerial radiation ripple and absorb and reflection, change the free space Energy distribution of antenna, and affect the electric property of antenna to a certain extent.
Prepare material many employings dielectric constant of radome and loss angle tangent is low, mechanical strength is high material at present, as fiberglass, epoxy resin, high molecular polymer etc., the dielectric constant of material has unadjustable property.Structure mostly is uniform single walled structure, sandwich and spatial skeleton structure etc.; the design of cone wall thickness need take into account operation wavelength, radome size and dimension, environmental condition, material therefor in factors such as electric and structural performances; the function of enhance antenna directionality and raising antenna gain is not possessed under protection antenna is from the condition of external environment influence; loss is comparatively large, and wave penetrate capability is poor.
Summary of the invention
The technical problem to be solved in the present invention is, for the defect that above-mentioned loss is comparatively large, wave penetrate capability is poor of prior art, provides low-loss electromagnetic wave transparent material and radome thereof and antenna system.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of low-loss electromagnetic wave transparent material, comprise the first substrate and second substrate be made up of nonmetallic materials, and the metal level be folded between first substrate and second substrate, described metal level is engraved multiple three bifurcate slot structures with three bifurcateds, three bifurcateds of described three bifurcate slot structures are total to end points and angle is obtuse angle each other.
In low-loss electromagnetic wave transparent material of the present invention, described low-loss electromagnetic wave transparent material also comprises the second metal micro structure of the multiple array arrangements being covered in described first substrate outer surface and is covered in the 3rd metal micro structure of multiple array arrangements of described second substrate outer surface.
In low-loss electromagnetic wave transparent material of the present invention, described second metal micro structure is three bifurcated metal micro structures, and three bifurcateds of described three bifurcated metal micro structures are total to end points and angle is obtuse angle each other.
In low-loss electromagnetic wave transparent material of the present invention, described 3rd metal micro structure is identical with the shape and size of the second metal micro structure.
In low-loss electromagnetic wave transparent material of the present invention, described three bifurcated metal micro structures are corresponding with described three positions of bifurcate slot structure between first substrate and second substrate in the position of first substrate outer surface.
In low-loss electromagnetic wave transparent material of the present invention, described three bifurcate slot structures with the direction at the symmetry axis place of its arbitrary bifurcated be row, to become the direction of 60 degree for arrange and line space equals the mode periodic arrangement of column pitch with described symmetry axis.
In low-loss electromagnetic wave transparent material of the present invention, described three bifurcated metal micro structures with the direction at the symmetry axis place of its arbitrary bifurcated be row, to become the direction of 60 degree for arrange and line space equals the mode periodic arrangement of column pitch with described symmetry axis.
In low-loss electromagnetic wave transparent material of the present invention, the dielectric constant of described first substrate and described second substrate is 2.65, and loss tangent is 0.001.
The present invention also provides a kind of radome, for being located at antenna, comprises low-loss electromagnetic wave transparent material as above.
The present invention also provides a kind of antenna system, and comprise antenna and radome as above, described radome covers on antenna.
Implement technical scheme of the present invention, have following beneficial effect: by adhering to the metal micro structure of given shape on substrate, obtain the electromagnetic response needed, the wave penetrate capability of radome is strengthened, antijamming capability increases.Can by regulating shape, the size of metal micro structure, change the relative dielectric constant of material, refractive index and impedance, thus realize the impedance matching with air, to increase the transmission of incident electromagnetic wave to greatest extent, decrease the restriction to material thickness and dielectric constant when traditional antenna cover designs.Low-loss electromagnetic wave transparent material of the present invention and radome thereof and antenna system can be operated in X-band, and the wave transmission efficiency in this wave band is very high.After antenna adds radome, the radianting capacity of antenna obtains reinforcement, effectively improves gain.
And, by the bandwidth regulating the size of three bifurcate slot structures and three bifurcated metal micro structures can change the working frequency range of electromagnetic wave transparent material, radome and antenna system.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the structural representation of the low-loss electromagnetic wave transparent material according to one embodiment of the invention;
Fig. 2 is the vertical view of low-loss electromagnetic wave transparent material described in Fig. 1;
Fig. 3 is the periodic arrangement schematic diagram of three bifurcate slot structures 31 shown in Fig. 2;
Fig. 4 is the structural representation of the low-loss electromagnetic wave transparent material according to another embodiment of the present invention;
Fig. 5 is the arrangement schematic diagram on the first substrate of the second metal level shown in Fig. 4;
Fig. 6 is the periodic arrangement schematic diagram of the second metal micro structure shown in Fig. 5 at first substrate outer surface;
Fig. 7 is the arrangement schematic diagram of the 3rd metal level on second substrate shown in Fig. 4;
Fig. 8 is the S parameter emulation schematic diagram according to the low-loss electromagnetic wave transparent material of one embodiment of the invention.
Embodiment
The invention provides a kind of low-loss electromagnetic wave transparent material, as shown in Figure 1, comprise the first substrate 10 and second substrate 20 be made up of nonmetallic materials, and the metal level be folded between first substrate 10 and second substrate 20, metal level is engraved multiple three bifurcateds with three bifurcate slot structure 31, three bifurcate slot structures 31 of three bifurcateds altogether end points and each other angle be obtuse angle.Be understandable that, the number of three bifurcate slot structures 31 shown in Figure of description is only signal, for illustration of the arrangement situation between man-made microstructure, not as limitation of the present invention.
The material manufacturing substrate has multiple choices, such as pottery, FR4, F4B(polytetrafluoroethylene), HDPE(high density polyethylene (HDPE), High Density Polyethylene), ABS(Acrylonitrile Butadiene Styrene), ferroelectric material or ferromagnetic material etc.First substrate 10, second substrate 20 preferably dielectric constant are 2.65, and loss angle tangent is the material of 0.001.
In an embodiment of the present invention, three bifurcateds of three bifurcate slot structures 31 each other angle are 120 degree, can be also unequal obtuse angle, such as, be respectively 100 degree, 120 degree, 140 degree, 110 degree, 120 degree, 130 degree, etc.The end of three bifurcateds of three bifurcate slot structures 31 can be arc, such as semi arch, elliptic arc etc.
Three bifurcate slot structures 31 are arranged on substrate, and its arrangement mode has multiple, common as rectangular array arrangement, be namely row with either direction, with the direction perpendicular to this direction for row, arrange according to certain line space and column pitch.
In the present invention, the design feature of three bifurcate slot structures 31 self, designs a kind of new periodic arrangement mode.As shown in Figure 2,3.Three bifurcate slot structures 31 with the direction at the symmetry axis place of its arbitrary bifurcated be row (being denoted as x direction), to become the direction of 60 degree for arranging (being denoted as y direction) periodic arrangement and line space (distance between central point O, O3 of adjacent two three bifurcate slot structures 31 on same row; note makes ⊿ y) equals column pitch (with the distance between central point O, O3 of two three bifurcate slot structures 31 adjacent in a line, note makes ⊿ x) with this symmetry axis.Then as shown in Figure 3, it is the rhombic quadrangles of 60 that the line of central point O, O1, O2, O3 4 of four three bifurcate slot structures 31 on adjacent rows, adjacent two row forms acute angle.Adopt this arrangement mode, can the space of substrate surface be utilized as far as possible fully arrange three bifurcate slot structures 31.
Fig. 4 is the structural representation of the low-loss electromagnetic wave transparent material according to another embodiment of the present invention.Low-loss electromagnetic wave transparent material comprises two-layer substrate: first substrate 10 and second substrate 20, and three-layer metal layer 1,2,3.Wherein metal level 1 is the metal level shown in Fig. 1.With Fig. 1 unlike, except the first substrate 10 in Fig. 1 and second substrate 20 and metal level, also comprise the second metal level 2 and the 3rd metal level 3.Second metal level 2 is covered in first substrate 10 outer surface, is made up of the second metal micro structure of multiple array arrangement.3rd metal level 3 is covered in second substrate 20 outer surface, is made up of the 3rd metal micro structure of multiple array arrangement.Second, third metal micro structure is the planar structure with certain geometrical pattern that electric conducting material is made.Here electric conducting material, it can be the metal material that the electric conductivity such as gold, silver, copper is good, or main component is one or both the alloy material in gold, silver, copper, also can be the nonmetallic materials that carbon nano-tube, Al-Doped ZnO, indium tin oxide etc. can conduct electricity.In the present invention, preferably copper or silver.The thickness of first substrate 10, second substrate 20 is 0.5 ~ 1.5mm.
Second metal micro structure is shown in shown in Fig. 5,6 in the arrangement of first substrate 10 outer surface and concrete shape.Second metal micro structure be three bifurcated metal micro structure 32, three bifurcated metal micro structures 32 three bifurcateds altogether end points and each other angle be 120 degree.In an embodiment of the present invention, three bifurcateds of three bifurcated metal micro structures 32 each other angle are 120 degree, can be also unequal obtuse angle, such as, be respectively 100 degree, 120 degree, 140 degree, 110 degree, 120 degree, 130 degree, etc.The end of three bifurcateds of three bifurcated metal micro structures 32 can be arc, such as semi arch, elliptic arc etc.
Similar with the arrangement situation of three bifurcate slot structures 31 mentioned above.Three bifurcated metal micro structures 32 with the direction at the symmetry axis place of its arbitrary bifurcated be row (being denoted as x direction), to become the direction of 60 degree for arranging (being denoted as y direction) periodic arrangement and line space (distance between central point O, O3 of adjacent two three bifurcated metal micro structures 32 on same row; note makes ⊿ y) equals column pitch (with the distance between central point O, O3 of two three bifurcated metal micro structures 32 adjacent in a line, note makes ⊿ x) with this symmetry axis.Then as shown in Figure 6, it is the rhombic quadrangles of 60 that the line of central point O, O1, O2, O3 4 of four three bifurcated metal micro structures 32 on adjacent rows, adjacent two row forms acute angle.Adopt this arrangement mode, can the space of substrate surface be utilized as far as possible fully arrange three bifurcated metal micro structures 32.
In a preferred embodiment, the shape and size of the 3rd metal micro structure and the second metal micro structure shape and size identical, be also three bifurcated metal micro structures, specifically can see mentioned above.Fig. 7 gives the arrangement schematic diagram of the 3rd metal level 3 shown in Fig. 4 on second substrate 20.
Three bifurcated metal micro structures 32 are corresponding with three positions of bifurcate slot structure 31 between first substrate 10 and second substrate 20 in the position of first substrate 10 outer surface.That is, the low-loss electromagnetic wave transparent material shown in vertical view 4, the center of three bifurcate slot structure 31, three bifurcated metal micro structure 32, three bifurcated metal micro structures 33 on three-layer metal layer is corresponding.
According to the working frequency range scope of required electromagnetic wave transparent material or radome, can to adjust with adapting to, the size of three bifurcate slot structure 31, three bifurcated metal micro structures 32,33 and row, column spacing, to meet the different needs.
The effect of low-loss electromagnetic wave transparent material of the present invention is described below in conjunction with specific embodiment.In one embodiment, each parameter value of three bifurcate slot structures 31 in Fig. 3 is: apart from ⊿ x=⊿ y=5mm between line space and row, groove width W1 is 0.7mm, and the end of three bifurcateds of three bifurcate slot structures 31 is semicircle arcuation.Each parameter value of three bifurcated metal micro structures 32 in Fig. 6 is: apart from ⊿ x=⊿ y=5mm between line space and row, groove width W2 is 1.8mm, and the end of three bifurcateds of three bifurcated metal micro structures 32 is semicircle arcuation.In an embodiment of the present invention, first substrate 10 and second substrate 20 are obtained by polytetrafluoroethylene (F4B).First metal micro structure 31 and second, third metal micro structure 32,33 are made of copper.Dielectric constant=2.65 of first substrate 10, second substrate 20, loss tangent tan δ=0.001.The thickness of first substrate 10, second substrate 20 is 1mm, and the thickness of metal micro structure 32,33 is 0.018mm.Above-mentioned parameter is only an example, not as limitation of the present invention.
By filling liquid raw substrate or interconnected by assembling between first substrate 10 and second substrate 20.The logical overetched mode of three-layer metal layer 1,2,3 is attached on substrate, plating can certainly be adopted, bore quarter, photoetching, electronics quarter or ion quarter etc. mode be attached on first substrate 10 or second substrate 20.First substrate 10 and second substrate 20 also can adopt other materials to make, such as pottery, HIPS(impact resistant polystyrene, High impact polystyrene) material, ferroelectric material, ferrite material or ferromagnetic material make.
Emulate the low-loss electromagnetic wave transparent material with above-mentioned parameter, its S parameter analogous diagram as shown in Figure 8.Can be seen by Fig. 8, in X-band (8 ~ 12GHz) scope, wave transmission effect is fine.And little in other frequency range S21 parameter, reflection coefficient is large, has filter action.When practical application, by regulating the size of three bifurcate slot structure 31, three bifurcated metal micro structure 32, three bifurcated metal micro structures 33, the relative dielectric constant of material, refractive index and impedance can be changed, thus working frequency range can move to high frequency or low frequency, or change the bandwidth of working frequency range.
Therefore, the present invention also provides a kind of radome, and this radome low-loss electromagnetic wave transparent material is by mentioned earlier made; for covering at antenna, while antenna is played a protective role, ensure that antenna normally works at working frequency range; mask uncorrelated frequency range, exclusive PCR.
It should be noted that, the shape of radome can be the tabular identical with the low-loss electromagnetic wave transparent material shape in accompanying drawing, also the shape of designing antenna cover can be carried out according to the actual requirements, the shape (conformal radome) etc. being such as designed to spherical shape or mate with antenna pattern, also do not get rid of the shape using multiple plate-like structure to be spliced into needs, the present invention is not restricted this.
The present invention also provides a kind of antenna system, comprises antenna, and radome as described above, and radome covers on antenna.Antenna comprises radiation source, feed element etc., and concrete formation can consult correlation technique data, and the present invention is not restricted this.Antenna body can be such as but not limited to plate aerial, microwave antenna, radar antenna etc.
Low-loss electromagnetic wave transparent material of the present invention and radome thereof and antenna system can be operated in X-band, and the wave transmission efficiency in this wave band is very high.After antenna adds radome, the radianting capacity of antenna obtains reinforcement, effectively improves gain.And, by the bandwidth regulating the size of three bifurcate slot structures and three bifurcated metal micro structures can change the working frequency range of electromagnetic wave transparent material, radome and antenna system.
By reference to the accompanying drawings embodiments of the invention are described above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; instead of it is restrictive; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that present inventive concept and claim protect, also can make a lot of form, these all belong within protection of the present invention.
Claims (9)
1. a low-loss electromagnetic wave transparent material, it is characterized in that, comprise the first substrate and second substrate be made up of nonmetallic materials, and the metal level be folded between first substrate and second substrate, described metal level is engraved multiple three bifurcate slot structures with three bifurcateds, three bifurcateds of described three bifurcate slot structures are total to end points and angle is obtuse angle each other; Described three bifurcate slot structures with the direction at the symmetry axis place of its arbitrary bifurcated be row, to become the direction of 60 degree for arrange and line space equals the mode periodic arrangement of column pitch with described symmetry axis; It is the rhombic quadrangles of 60 that the line of the central point 4 of four described three bifurcate slot structures on adjacent rows, adjacent two row forms acute angle.
2. low-loss electromagnetic wave transparent material according to claim 1, it is characterized in that, described low-loss electromagnetic wave transparent material also comprises the second metal micro structure of the multiple array arrangements being covered in described first substrate outer surface and is covered in the 3rd metal micro structure of multiple array arrangements of described second substrate outer surface.
3. low-loss electromagnetic wave transparent material according to claim 2, is characterized in that, described second metal micro structure is three bifurcated metal micro structures, and three bifurcateds of described three bifurcated metal micro structures are total to end points and angle is obtuse angle each other.
4. low-loss electromagnetic wave transparent material according to claim 3, is characterized in that, described 3rd metal micro structure is identical with the shape and size of the second metal micro structure.
5. low-loss electromagnetic wave transparent material according to claim 3, is characterized in that, described three bifurcated metal micro structures are corresponding with described three positions of bifurcate slot structure between first substrate and second substrate in the position of first substrate outer surface.
6. low-loss electromagnetic wave transparent material according to claim 3, it is characterized in that, described three bifurcated metal micro structures with the direction at the symmetry axis place of its arbitrary bifurcated be row, to become the direction of 60 degree for arrange and line space equals the mode periodic arrangement of column pitch with described symmetry axis.
7. low-loss electromagnetic wave transparent material according to claim 1, is characterized in that, the dielectric constant of described first substrate and described second substrate is 2.65, and loss tangent is 0.001.
8. a radome, is characterized in that, for being located at antenna, comprises the low-loss electromagnetic wave transparent material as described in any one of claim 1 ~ 7.
9. an antenna system, is characterized in that, comprise antenna and radome as claimed in claim 8, described radome covers on antenna.
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| CN201210220532.7A CN102832453B (en) | 2012-09-18 | 2012-09-18 | Low-loss wave-transparent material, antenna housing and antenna system thereof |
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| CN201210220532.7A CN102832453B (en) | 2012-09-18 | 2012-09-18 | Low-loss wave-transparent material, antenna housing and antenna system thereof |
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| CN102832453B true CN102832453B (en) | 2015-06-03 |
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| CN111653875A (en) * | 2020-05-20 | 2020-09-11 | 中国科学院空间应用工程与技术中心 | Periodic wave-transparent material shaped like Chinese character 'mi' for 5GHz communication and case |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6218978B1 (en) * | 1994-06-22 | 2001-04-17 | British Aerospace Public Limited Co. | Frequency selective surface |
| CN102479994A (en) * | 2011-10-31 | 2012-05-30 | 深圳光启高等理工研究院 | Metamaterial antenna housing |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6885355B2 (en) * | 2002-07-11 | 2005-04-26 | Harris Corporation | Spatial filtering surface operative with antenna aperture for modifying aperture electric field |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6218978B1 (en) * | 1994-06-22 | 2001-04-17 | British Aerospace Public Limited Co. | Frequency selective surface |
| CN102479994A (en) * | 2011-10-31 | 2012-05-30 | 深圳光启高等理工研究院 | Metamaterial antenna housing |
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