CN103296410A - High-gain metamaterial antenna housing and antenna system - Google Patents
High-gain metamaterial antenna housing and antenna system Download PDFInfo
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- CN103296410A CN103296410A CN 201210050994 CN201210050994A CN103296410A CN 103296410 A CN103296410 A CN 103296410A CN 201210050994 CN201210050994 CN 201210050994 CN 201210050994 A CN201210050994 A CN 201210050994A CN 103296410 A CN103296410 A CN 103296410A
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Abstract
The invention relates to a high-gain metamaterial antenna housing and an antenna system. The metamaterial antenna housing comprises at least one metamaterial slice layer, each metamaterial slice layer comprises a substrate and a plurality of artificial microstructures arranged on the substrate in an array mode; the artificial microstructures comprise four square-shaped structures arranged in an array mode, wherein a corner, close to the center of each artificial microstructure, of each square-shaped structure is provided with a notch. Needed electromagnetic response is obtained through the artificial microstructures in specific shapes and attached to the substrate. The relative dielectric constant, the refractive index and impedance of materials can be changed through regulation of the shapes and dimensions of the artificial microstructures, and directionality and grain of antennas are improved; under the condition of reaching the same grain, the array number of the antennas can be greatly reduced, and the overall size of the antennas is reduced. The space between the antenna housing and the antennas is little, the overall thickness is small, the number of layers of the metamaterial is regulated to control the grain of the antennas, user experience is improved, and different requirements of different customers for the grain of the antennas are met.
Description
Technical field
The present invention relates to radome, more particularly, relate to the super material radome of high-gain and antenna system.
Background technology
In recent years, development along with wireless communication technique, WLAN (wireless local area network) has been goed deep into each place, in order in mode low-cost, wireless penetration each wireless network to be together in series, the cloth that needs to strengthen the backbone network base station is built, usually constitute with long distance and point-to-point mode, therefore need high directivity, high-gain aerial.
Generally speaking, antenna system all can be provided with radome, and the purpose of radome is the influence that the protection antenna system is avoided wind and rain, ice and snow, sand and dust and solar radiation etc., makes the antenna system service behaviour more stable, reliable.Alleviate wearing and tearing, the corrosion and aging of antenna system simultaneously, increase the service life.But radome is the barrier of antenna front, can produce the aerial radiation ripple to absorb and reflection, changes the free space Energy distribution of antenna, especially the big material of dielectric constant and loss, big to the electromagnetic reflection coefficient of antenna, influence the performance of antenna, reduce antenna gain.
Super material is commonly called as super material, is a kind of novel artificial synthetic material, is the substrate of being made by nonmetallic materials and is attached on the substrate surface or a plurality of artificial micro-structural that is embedded in substrate inside constitutes.Substrate can be divided into a plurality of base board units that rectangular array is arranged virtually, be attached with artificial micro-structural on each base board unit, thereby form a super material cell, whole super material is made up of a lot of so super material cell, just as crystal is to be made of according to certain arranging countless lattices.Artificial micro-structural on each super material cell can be identical or incomplete same.Artificial micro-structural has certain geometric plane or a stereochemical structure by what wire was formed, for example forms annular, I-shaped wire etc.
The stack meeting of artificial micro-structural and substrate produces an effective dielectric constant and magnetic permeability in the space, these two physical parameters are corresponding respectively electric field response and the magnetic responsiveness of material monolithic.The electromagnetic response of super material depends on topological characteristic and the super material cell size of its artificial micro-structural metal wire to a great extent.By concrete structure and the shape different to artificial microstructure design, can change the response characteristic of whole super material.
At present the material of preparation radome adopts dielectric constant and loss angle tangent is low, mechanical strength is high material more, and as fiberglass, epoxy resin, high molecular polymer etc., the dielectric constant of material has unadjustable property.Mostly be uniform single walled structure, sandwich and spatial skeleton structure etc. on the structure; 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, is protecting antenna to avoid scarcely possessing under the condition of external environment influence the function of enhance antenna directionality and gain.
Summary of the invention
The technical problem to be solved in the present invention is, do not possess the defective of enhance antenna directionality and gain at the above-mentioned radome of prior art, and the super material radome of a kind of high-gain and antenna system are provided.
The technical solution adopted for the present invention to solve the technical problems is: construct the super material radome of a kind of high-gain, comprise at least one super sheet of material, each super sheet of material comprises substrate and the array arrangement a plurality of artificial micro-structural on described substrate; Described artificial micro-structural comprises the square shape structure of four array arrangements, and wherein the corner at the close described artificial micro-structural center of each square shape structure offers breach.
In the super material radome of high-gain of the present invention, described substrate can be divided into a plurality of super material cell, wherein is placed with a described artificial micro-structural on each super material cell.
In the super material radome of high-gain of the present invention, described square shape structure measure-alike.
In the super material radome of high-gain of the present invention, per two adjacent square shape spacing structure predeterminable ranges.
In the super material radome of high-gain of the present invention, described square shape structure is made of the wire with default live width.
In the super material radome of high-gain of the present invention, described radome is operated in L-band and S-band.
In the super material radome of high-gain of the present invention, the thickness of described substrate is 2mm, and the thickness of described artificial micro-structural is 0.018mm.
In the super material radome of high-gain of the present invention, described substrate is made by the F4B composite material.
In the super material radome of high-gain of the present invention, described artificial micro-structural is made by copper cash or silver-colored line.
The present invention also provides a kind of antenna system, comprises antenna body, and aforesaid super material radome, and described super material radome and antenna body be arranged in parallel and keep at a certain distance away.
Implement technical scheme of the present invention, have following beneficial effect: by adhere to the artificial micro-structural of given shape at substrate, obtain the electromagnetic response that needs.Can change relative dielectric constant, refractive index and the impedance of material by regulating shape, the size of artificial micro-structural, thereby improve directivity and the gain of antenna; And reaching under the equal gain condition, radome of the present invention can significantly reduce the number of arrays of antenna, reduces the antenna overall volume.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the structural representation according to a super sheet of material of the super material radome of high-gain of one embodiment of the invention;
Fig. 2 is the structural representation that is piled up the super material radome that forms by a plurality of super sheet of material shown in Figure 1;
Fig. 3 is the schematic perspective view according to the structure of the super sheet of material of one embodiment of the invention;
Fig. 4 is the artificial micro-structural of adhering on the super sheet of material schematic diagram of arranging;
Fig. 5 is the schematic diagram of artificial micro-structural;
Fig. 6 is the S11 parameters simulation result schematic diagram that has increased in the antenna system behind the super material radome of high-gain;
Fig. 7 shows the antenna system far-field radiation pattern of the invention process example;
Fig. 8 be when increasing super material radome and not adding super material radome antenna system at the gain contrast figure of each frequency.
Embodiment
Super material is a kind of artificial composite structure material with the not available extraordinary physical property of natural material, by the orderly arrangement to micro-structural, can change in the space relative dielectric constant and magnetic permeability at every.Super material can be realized refractive index, impedance and the wave penetrate capability that common material can't possess within the specific limits, thereby can effectively control the electromagnetic wave propagation characteristic.Super material radome based on artificial micro-structural can be by regulating shape, the size of artificial micro-structural, change relative dielectric constant, refractive index and the impedance of material, thereby realize the impedance matching with air, to increase the transmission of incident electromagnetic wave to greatest extent, improve the directivity of electromagenetic wave radiation, improve the gain of antenna.
The invention provides a kind of super material radome, comprise at least one super sheet of material 1, as depicted in figs. 1 and 2.Each super sheet of material 1 comprises substrate 10 and is attached to the artificial micro-structural 20 of the array arrangement on the substrate 10.When super sheet of material 1 has when a plurality of, each super sheet of material 1 is along the direction stack perpendicular to lamella, and is assembled into one by mechanical connection, welding or bonding mode, as shown in Figure 2.Here be that example describes with a substrate, but when actual design, also can adopt two substrates, and artificial micro structure array is arranged on one of them substrate, another substrate covers artificial micro-structural, artificial micro-structural is folded between two substrates, can reaches purpose of the present invention equally.For example adopt 3 laminar substrates, two-layer artificial micro-structural is intervally arranged between 3 laminar substrates; In like manner, adopt 5 laminar substrates, 3 layers of micro-structural are intervally arranged between 5 laminar substrates.The present invention does not limit the concrete quantity of super sheet of material, can regulate super number of layers according to different gain requirements, thus the control antenna gain.
Usually, under the situation that can satisfy performance, a super sheet of material just can be used as super material radome and uses.The plane, artificial micro-structural place of array arrangement is parallel with magnetic direction with electromagnetic electric field, and is vertical with the incident electromagnetic wave direction of propagation.Substrate 10 in the super sheet of material 1 can be divided into a plurality of super material cell.As shown in Figure 3-4, be placed with an artificial micro-structural 20 on each super material cell.In an embodiment of the present invention, the length of each super material cell and wide be b=26mm.The division number of the super material cell shown in the figure is only for signal, not as limitation of the present invention.
Artificial micro-structural 20 comprises the square shape structure of four array arrangements, and wherein the corner at the close artificial micro-structural center of each square shape structure offers breach.In an embodiment of the present invention, square shape structure measure-alike, per two adjacent square shape spacing structure predeterminable range c are such as but not limited to c=0.1～0.3mm.The square shape structure is made of the wire with default live width w, and default live width w is such as but not limited to 0.05～0.15mm, and two length of sides in the outside of square shape structure are 12.8mm, and two length of sides with breach are 12.6mm.Radome of the present invention can be operated in the low frequency frequency range, and for example L-band (1～2GHz) and S-band (2～4GHz).
The thickness of substrate 10 is 1mm, and the thickness of artificial micro-structural 20 is 0.018mm.Numerical value herein only is example, in actual applications, can adjust according to actual demand, and the present invention is not restricted this.
In an embodiment of the present invention, substrate 10 is made by F4B or FR4 composite material.Artificial micro-structural 20 is attached on the substrate 10 by etched mode, certain artificial micro-structural 20 also can adopt plating, bores quarter, photoetching, electronics is carved or ion quarter etc. mode be attached on the substrate 10.Substrate 10 also can adopt other materials to make, and makes such as pottery, polytetrafluoroethylene, ferroelectric material, ferrite material or ferromagnetic material.Artificial micro-structural 20 adopts copper cash to make, and can certainly adopt electric conducting materials such as silver-colored line, ITO, graphite or carbon nano-tube to make.The radome of illustrating in the accompanying drawing be shaped as tabular, when actual design, also can come the shape of designing antenna cover according to the actual requirements, such as being designed to spherical shape or with the shape (conformal radome) of antenna pattern coupling etc., the present invention is not restricted this.
The present invention also provides a kind of antenna system, comprises antenna body, and super material radome as indicated above, and super material radome and antenna body be arranged in parallel and keep at a certain distance away.Antenna body comprises radiation source, feed element etc., and concrete formation can be consulted the correlation technique data, and the present invention is not restricted this.Antenna body can be such as but not limited to plate aerial.The spacing distance of antenna body and radome can be very little, and such as 5mm, and the gross thickness of radome itself also only has about 2mm, therefore reduced the overall volume of antenna greatly.The antenna here can be such as but not limited to the WLAN antenna.
Fig. 6 shows near the S11 parameters simulation result schematic diagram that arranges the antenna body behind the super material radome of high-gain.From simulation result as can be seen, near S11 2.4GHz is very little for antenna, has quite low return loss.
Fig. 7 shows the antenna system far-field radiation pattern of the invention process example.After antenna added super material radome, wave beam and emittance can be converged, and effectively improved gain.Antenna system was in the gain contrast figure of each frequency, the gain when dotted line is represented not add radome, the gain when solid line is represented to increase radome when Fig. 8 showed the super material radome that adds the embodiment of the invention and do not add super material radome.As can be seen from the comparison result, in frequency 2.4-2.5GHz scope, when adopting the super material radome of the embodiment of the invention, the gain of antenna all is improved.At frequency 2.48GHz place, adopt the super material radome of the invention process example can obtain the gain of 12.01dB, and the gain of antenna is 7.2dB when not adding radome, has improved the gain characteristic of 4.8dB.
The present invention obtains the electromagnetic response that needs by adhere to the artificial micro-structural of given shape at substrate.Can change relative dielectric constant, refractive index and the impedance of material by regulating shape, the size of artificial micro-structural, thereby improve directivity and the gain of antenna; And reaching under the equal gain condition, radome of the present invention can significantly reduce the number of arrays of antenna, reduces the antenna overall volume.Super material radome of the present invention is not limited to single frequency to the raising of antenna gain, and comparing result shows, in frequency 2.4-2.5GHz scope, when adopting the super material radome of the embodiment of the invention, the gain of antenna all is improved.Overcome in the prior art, formed and doubly increase the problem that cost that aerial array unit brings and volume increase in order to improve gain.And the interval between radome and the antenna surface is little, and integral thickness is very thin, and can be by regulating super number of layers control antenna gain, and this has just improved user's experience, has satisfied different clients to the not too demand of antenna gain.
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 only is schematic; rather than it is restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not breaking away under the scope situation that aim of the present invention and claim protect, also can make a lot of forms, these all belong within the protection of the present invention.
Claims (10)
1. the super material radome of high-gain is characterized in that, comprises at least one super sheet of material, and each super sheet of material comprises substrate and the array arrangement a plurality of artificial micro-structural on described substrate; Described artificial micro-structural comprises the square shape structure of four array arrangements, and wherein the corner at the close described artificial micro-structural center of each square shape structure offers breach.
2. the super material radome of high-gain according to claim 1 is characterized in that, described substrate can be divided into a plurality of super material cell, wherein is placed with a described artificial micro-structural on each super material cell.
3. the super material radome of high-gain according to claim 1 is characterized in that, described square shape structure measure-alike.
4. the super material radome of high-gain according to claim 3 is characterized in that, per two adjacent square shape spacing structure predeterminable ranges.
5. the super material radome of high-gain according to claim 1 is characterized in that, described square shape structure is made of the wire with default live width.
6. the super material radome of high-gain according to claim 1 is characterized in that described radome is operated in L-band and S-band.
7. the super material radome of high-gain according to claim 1 is characterized in that, the thickness of described substrate is 2mm, and the thickness of described artificial micro-structural is 0.018mm.
8. the super material radome of high-gain according to claim 1 is characterized in that described substrate is made by the F4B composite material.
9. according to the arbitrary described radome of claim 1 to 8, it is characterized in that described artificial micro-structural is made by copper cash or silver-colored line.
10. an antenna system is characterized in that, comprises antenna body, and as each described super material radome of claim 1～9, described super material radome and antenna body be arranged in parallel and keep at a certain distance away.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210050994 CN103296410A (en) | 2012-02-29 | 2012-02-29 | High-gain metamaterial antenna housing and antenna system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201210050994 CN103296410A (en) | 2012-02-29 | 2012-02-29 | High-gain metamaterial antenna housing and antenna system |
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| CN103296410A true CN103296410A (en) | 2013-09-11 |
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| CN 201210050994 Pending CN103296410A (en) | 2012-02-29 | 2012-02-29 | High-gain metamaterial antenna housing and antenna system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104767012A (en) * | 2015-04-24 | 2015-07-08 | 江苏科技大学 | Frequency selective surface |
| CN105612660A (en) * | 2014-02-27 | 2016-05-25 | 华为技术有限公司 | Shared-aperture antenna and base station |
| CN112542685A (en) * | 2020-12-18 | 2021-03-23 | 北京大学 | Microwave and terahertz wave all-metal hyperbolic metamaterial antenna and implementation method thereof |
| US11005187B2 (en) | 2019-08-28 | 2021-05-11 | Government Of The United States, As Represented By The Secretary Of The Army | Antenna structure with metamaterial |
-
2012
- 2012-02-29 CN CN 201210050994 patent/CN103296410A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105612660A (en) * | 2014-02-27 | 2016-05-25 | 华为技术有限公司 | Shared-aperture antenna and base station |
| US10003132B2 (en) | 2014-02-27 | 2018-06-19 | Huawei Technologies Co., Ltd. | Shared-aperture antenna and base station |
| CN105612660B (en) * | 2014-02-27 | 2019-10-22 | 华为技术有限公司 | A kind of common reflector and base station |
| CN104767012A (en) * | 2015-04-24 | 2015-07-08 | 江苏科技大学 | Frequency selective surface |
| US11005187B2 (en) | 2019-08-28 | 2021-05-11 | Government Of The United States, As Represented By The Secretary Of The Army | Antenna structure with metamaterial |
| CN112542685A (en) * | 2020-12-18 | 2021-03-23 | 北京大学 | Microwave and terahertz wave all-metal hyperbolic metamaterial antenna and implementation method thereof |
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Application publication date: 20130911 |