CN102683843B - microwave antenna cover and antenna system - Google Patents
microwave antenna cover and antenna system Download PDFInfo
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- CN102683843B CN102683843B CN201210127684.2A CN201210127684A CN102683843B CN 102683843 B CN102683843 B CN 102683843B CN 201210127684 A CN201210127684 A CN 201210127684A CN 102683843 B CN102683843 B CN 102683843B
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Abstract
The present invention relates to microwave antenna cover and antenna system.Microwave antenna cover covers on antenna, described microwave antenna cover comprises at least one metamaterial sheet, and each metamaterial sheet comprises first substrate, second substrate and to be located between first substrate and second substrate and the multiple measure-alike man-made microstructure of array arrangement; Described man-made microstructure is decussate texture; Described first substrate is different from the thickness of second substrate.The present invention adheres to the man-made microstructure of given shape on substrate, regulates the shape of man-made microstructure, relative dielectric constant that size changes material, refractive index and impedance, strengthens electromagnetic transmission, improves directivity and the gain of antenna.
Description
Technical field
The present invention relates to radome, more particularly, relate to microwave antenna cover and antenna system.
Background technology
Meta Materials, is commonly called as Meta Materials, is a kind of novel artificial synthetic material, be the substrate be made up of nonmetallic materials and attachment on the surface of the substrate or the multiple man-made microstructure being embedded in substrate inside form.Substrate can be divided into multiple base board units of rectangular array arrangement virtually, each base board unit is attached with man-made microstructure, thus form a metamaterial unit, whole Meta Materials is made up of much such metamaterial unit, just as crystal is made up of according to certain arrangement countless lattices.Man-made microstructure in each metamaterial unit can be identical or incomplete same.What man-made microstructure was made up of wire has certain geometric plane or stereochemical structure, such as, form annular, I-shaped wire etc.
Due to the existence of man-made microstructure, each metamaterial unit has the electromagnetic property being different from substrate itself, and the Meta Materials that therefore all metamaterial unit are formed presents special response characteristic to Electric and magnetic fields; By designing different concrete structures and shape to man-made microstructure, the response characteristic of whole Meta Materials can be changed.
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; under protection antenna is from the condition of external environment influence, do not possess the function of enhance antenna directionality and raising antenna gain, wave penetrate capability is poor.
Summary of the invention
The technical problem to be solved in the present invention is, the above-mentioned wave penetrate capability for prior art is poor, can not improve the defect of antenna gain, provides a kind of microwave antenna cover and antenna system.
The technical solution adopted for the present invention to solve the technical problems is: provide a kind of microwave antenna cover, described microwave antenna cover covers on antenna, described microwave antenna cover comprises at least one metamaterial sheet, and each metamaterial sheet comprises first substrate, second substrate and to be located between first substrate and second substrate and the multiple measure-alike man-made microstructure of array arrangement; Described man-made microstructure is decussate texture; Described first substrate is different from the thickness of second substrate.
In microwave antenna cover of the present invention, described metamaterial sheet can be divided into multiple metamaterial unit, and wherein each metamaterial unit is placed with a described man-made microstructure.
In microwave antenna cover of the present invention, the length of side of each metamaterial unit is 8.7mm.
In microwave antenna cover of the present invention, by two, the measure-alike and wire vertically divided equally is formed described decussate texture.
In microwave antenna cover of the present invention, described length wiry is equal with the length of side of metamaterial unit.
In microwave antenna cover of the present invention, described live width wiry is 0.1mm.
In microwave antenna cover of the present invention, described first substrate and second substrate are made up of ABS material.
In microwave antenna cover of the present invention, the thickness of described man-made microstructure is 0.018mm.
In microwave antenna cover of the present invention, the thickness of described first substrate is 1mm, and the thickness of described second substrate is 2mm.
The present invention also provides a kind of antenna system, comprises microwave antenna and microwave antenna cover as above.
Implement technical scheme of the present invention, have following beneficial effect: by adhering to the man-made microstructure of given shape on substrate, obtain the electromagnetic response needed, the wave penetrate capability based on the radome of Meta Materials is strengthened, antijamming capability increases.Can by regulating shape, the size of man-made microstructure, 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.And radome wave transmission efficiency of the present invention is high, loss is less.And after antenna adds radome, the radianting capacity of antenna obtains reinforcement, effectively improves gain, radiation directivity strengthens.
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 a metamaterial sheet of the microwave antenna cover of foundation one embodiment of the invention;
Fig. 2 is by the structural representation of the stacking microwave antenna cover formed of the metamaterial sheet shown in multiple Fig. 1;
Fig. 3 is the structural representation of the metamaterial sheet according to one embodiment of the invention;
Fig. 4 is the arrangement schematic diagram of man-made microstructure;
Fig. 5 is the schematic diagram of man-made microstructure;
Fig. 6 is the S21 parameter schematic diagram of microwave antenna cover.
Embodiment
Meta Materials is a kind of artificial composite structure material with extraordinary physical property not available for natural material, by the ordered arrangement to micro-structural, can change relative dielectric constant and the magnetic permeability of in space often.Meta Materials can realize refractive index that common material cannot possess, impedance and wave penetrate capability within the specific limits, thus can effectively control electromagnetic wave propagation characteristic.Microwave antenna cover based on man-made microstructure by regulating shape, the size of man-made microstructure, can change the relative dielectric constant of material, refractive index and impedance, thus realizes the impedance matching with air, to increase the transmission of incident electromagnetic wave to greatest extent.And by regulating microstructure size to carry out He Ne laser, adjust corresponding wave transparent and frequency filtering as required.
The invention provides a kind of microwave antenna cover, microwave antenna cover covers on antenna.Microwave antenna cover comprises at least one metamaterial sheet 1, as depicted in figs. 1 and 2.Each metamaterial sheet 1 comprises two substrates be oppositely arranged and is attached to the man-made microstructure of the array arrangement between two substrates.When metamaterial sheet 1 has multiple, each metamaterial sheet 1 superposes along the direction perpendicular to lamella, and is assembled into one by the mode being mechanically connected, welding or bond, as shown in Figure 2.Usually, when meeting performance, a metamaterial sheet just can use as microwave antenna cover.The man-made microstructure place plane of array arrangement is parallel with electromagnetic Electric and magnetic fields direction, vertical with incoming electromagnetic direction of wave travel.First substrate 10 in metamaterial sheet 1 can be divided into multiple metamaterial unit, wherein each metamaterial unit is placed with a man-made microstructure.Radome shown in figure is plate-like rectangular, when reality uses, can be designed to other shape according to demand.Such as if the horn antenna of circular cross-section, then in order to cover on horn antenna by radome, then what need to be designed to match with the circular cross-section of antenna is discoideus, instead of the rectangular shape shown in Fig. 1; If use the horn antenna of square-section, then need radome design to be become the rectangular shape matched with the rectangular aperture of antenna.The concrete shape of the present invention to radome does not limit.
Fig. 3 shows the structural representation (perspective view) of metamaterial sheet.Metamaterial sheet 1 comprises first substrate 10, second substrate 20 and to be located between first substrate 10 and second substrate 20 and the multiple measure-alike man-made microstructure 30 of array arrangement.Man-made microstructure 30 is decussate texture, and first substrate 10 is different from the thickness of second substrate 20.
Metamaterial sheet 1 can be divided into multiple metamaterial unit, wherein each metamaterial unit is placed with a man-made microstructure.In an embodiment of the present invention, be described for two substrates, but when actual design, also can only adopt first substrate 10, and man-made microstructure array arrangement be on first substrate 10, can reach object of the present invention equally.
As illustrated in figures 4-5, the length of side of each metamaterial unit is equal, is a=8.7mm, and man-made microstructure 30 is close to the border of metamaterial unit.Man-made microstructure 30 is decussate texture, and by two, the measure-alike and wire vertically divided equally is formed decussate texture.The live width w=0.1mm wiry of decussate texture, length wiry is equal with the length of side of metamaterial unit.First substrate 10 and second substrate 20 are made up of ABS material, and the thickness of first substrate 10 is 1mm, and the thickness of second substrate 20 is 2mm, and the thickness of man-made microstructure 30 is 0.018mm.Numerical value is herein only example, and in actual applications, can adjust according to actual demand, the present invention is not restricted this.
In an embodiment of the present invention, first substrate 10 and second substrate 20 are obtained by ABS material.By filling liquid raw substrate or interconnected by assembling between first substrate 10 and second substrate 20.Man-made microstructure 30 is led to overetched mode and is attached on first substrate 10, and the modes such as certain man-made microstructure 30 also can adopt plating, bores quarters, photoetching, electronics quarter or ion quarter are attached on first substrate 10 or second substrate 20.First substrate 10 and second substrate 20 also can adopt other materials to make, and such as pottery, polytetrafluoroethylene, ferroelectric material, ferrite material or ferromagnetic material are made.Man-made microstructure 30 adopts copper cash to make, and the electric conducting materials such as silver-colored line, ITO, graphite or carbon nano-tube can certainly be adopted to make.The shape of the radome illustrated in accompanying drawing is tabular, also the shape of designing antenna cover can be carried out according to the actual requirements when actual design, the shape (conformal radome) etc. that such as can be 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 S21 parameter of the microwave antenna cover of the present embodiment with frequency change schematic diagram as shown in Figure 6, first substrate 10 used and second substrate 20 are ABS substrate.Can be seen by Fig. 6, after technical scheme of the present invention adheres to man-made microstructure on substrate, S21 parameter is when 13.831GHz, and S21 parameter is-0.5dB, and when 7.0113GHz, S21 parameter is-0.5dB.As we know from the figure, within the scope of 7 ~ 13.831GHz, S21 parameter is all greater than-0.5dB.Radome of the present invention is adopted to have good wave penetrate capability.
The present invention also provides a kind of antenna system, comprises microwave antenna, and microwave antenna cover as described above, and microwave antenna cover covers on antenna.Microwave antenna comprises radiation source, feed element etc., and concrete formation can consult correlation technique data, and the present invention is not restricted this.Microwave antenna can be such as but not limited to horn antenna etc.
The present invention, by adhering to the man-made microstructure of given shape on substrate, obtains the electromagnetic response needed, the wave penetrate capability based on the radome of Meta Materials is strengthened, and antijamming capability increases.Can by regulating shape, the size of man-made microstructure, 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.And the wave transmission efficiency of radome of the present invention within the scope of 7-13.831GHz is very high.After antenna adds radome, the radianting capacity of antenna is improved, and radiation directivity strengthens.
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 (5)
1. a microwave antenna cover, is characterized in that, described microwave antenna cover covers on antenna, and described microwave antenna cover can be operated in 7-13.831GHz frequency range; Described microwave antenna cover comprises at least one metamaterial sheet, each metamaterial sheet comprises first substrate, second substrate and to be located between first substrate and second substrate and the multiple measure-alike man-made microstructure of array arrangement, described metamaterial sheet is divided into multiple metamaterial unit, and wherein each metamaterial unit is placed with a described man-made microstructure; Described man-made microstructure is decussate texture, by two, the measure-alike and wire vertically divided equally is formed described decussate texture, described length wiry is equal with the length of side of metamaterial unit, man-made microstructure is close to the border of metamaterial unit, the thickness of described man-made microstructure is 0.018mm, and described live width wiry is 0.1mm; Described first substrate is different from the thickness of second substrate.
2. microwave antenna cover according to claim 1, is characterized in that, the length of side of each metamaterial unit is 8.7mm.
3. microwave antenna cover according to claim 1, is characterized in that, described first substrate and second substrate are made up of ABS material.
4. microwave antenna cover according to claim 1, is characterized in that, the thickness of described first substrate is 1mm, and the thickness of described second substrate is 2mm.
5. an antenna system, is characterized in that, comprises microwave antenna and the microwave antenna cover as described in any one of Claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210127684.2A CN102683843B (en) | 2012-04-27 | 2012-04-27 | microwave antenna cover and antenna system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210127684.2A CN102683843B (en) | 2012-04-27 | 2012-04-27 | microwave antenna cover and antenna system |
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| CN102683843A CN102683843A (en) | 2012-09-19 |
| CN102683843B true CN102683843B (en) | 2015-09-09 |
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| CN103887615B (en) * | 2014-04-03 | 2016-06-01 | 四川大学 | A kind of wave beam antenna based on non-homogeneous special medium |
| CN110416725A (en) * | 2019-08-21 | 2019-11-05 | 中国安全生产科学研究院 | A kind of high gain medium electromagnetic horn |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102074777A (en) * | 2011-01-05 | 2011-05-25 | 华东师范大学 | Micro-strip rectangular double annular circular-seam resonator-based frequency selectivity surface structure |
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| KR100928027B1 (en) * | 2007-12-14 | 2009-11-24 | 한국전자통신연구원 | Metamaterial structures with negative permittivity, permeability and refractive index |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102074777A (en) * | 2011-01-05 | 2011-05-25 | 华东师范大学 | Micro-strip rectangular double annular circular-seam resonator-based frequency selectivity surface structure |
Non-Patent Citations (3)
| Title |
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| A Look at Some Challenging Problems in Computational Electromagnetics;Raj Mittra;《IEEE Antennasandpropagation Magazine》;20041031;第46卷(第5期);全文 * |
| Design of Dual-Polarized High-Gain Antenna Radome by Using Jerusalem Cross Metamaterial Structure;Hung-Chi Huang et al;《Antennas and Propagation Society International Symposium》;20090605;第1页第1行-第3页第15行，图1（a） * |
| Novel High Gain Metamaterial Antenna Radome for WiMAX Operation in the 5.8-GHz band;Chun-Yih Wu et al;《Antennas and Propagation Society International Symposium》;20070615;第3488页第1行-第3490页第7行，图1（a）,图1（b） * |
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Effective date of registration: 20151123 Address after: 518057 Guangdong City, Nanshan District province high tech Zone in the middle of a high tech building, building No. 2, No. 9, building Patentee after: Shenzhen Guangqi Innovative Technology Co., Ltd. Address before: 518034 A international business center, No. 1061, Xiang Mei Road, Guangdong, Shenzhen, Futian District, China 18B Patentee before: Shenzhen Kuang-Chi Innovation Technology Co., Ltd. |