CN104485520A - Beam scanning array antenna having ultralow elevation characteristic - Google Patents
Beam scanning array antenna having ultralow elevation characteristic Download PDFInfo
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- CN104485520A CN104485520A CN201410856834.2A CN201410856834A CN104485520A CN 104485520 A CN104485520 A CN 104485520A CN 201410856834 A CN201410856834 A CN 201410856834A CN 104485520 A CN104485520 A CN 104485520A
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Abstract
The invention relates to a beam scanning array antenna, in particular to a beam scanning array antenna having an ultralow elevation characteristic. The antenna is formed by an array antenna body and a metamaterial lens, the beams of the array antenna body can be finitely scanned, and the metamaterial lens can achieve the beam deflection effect; when the composite beams radiated from the array antenna body pass through the metamaterial lens, a fixed additional deflection angle theta 0 can be formed, the beam pointing direction is changed along with the array antenna body within a certain angle domain, and an ultralow elevation antenna main beam directional pattern can be formed through secondary beams of the metamaterial lens. The beam scanning array antenna having the ultralow elevation characteristic greatly increases low-elevation gains of planar phased-array antennas, reduces antenna sizes, lowers cost and can be suitable for various installation platforms.
Description
Technical field
The present invention relates to a kind of beam scanning array antenna, particularly a kind of beam scanning array antenna with ultralow elevation angle characteristic.
Background technology
Along with the development of communication technology of satellite and the expansion of application, realize becoming more and more urgent with the demand of satellite Real Data Exchangs in mobile vehicle.The research of " antenna for satellite communication in motion " technology has become one of study hotspot of present satellites communication technical field.In order to ensure the mobility of mobile vehicle, requiring SOTM satellite antenna should have high-gain, low noise, littlely compared with low profile, equipment volume being easy to hidden, antenna beam can be realized still the features such as proper communication are kept from motion tracking and under the low elevation angle to satellite.Therefore the planar array antenna that the wave beam possessing correlation properties can scan becomes the important directions of communication in moving System Development.From antenna for satellite communication in motion researchs more both domestic and external at present, be mainly divided into reflector antenna and low profile array antenna, wherein array antenna also comprises several implementation of mechanical scanning, electronic scanning and mixed sweep.The section height increasing array antenna is the main path solving array antenna low elevation gain deficiency at present, and main method is that antenna array is overall or is divided into little submatrix in pitching to the inclination making certain angle.But the raising of antenna height can cause very large restriction to the mounting condition of carrier and environment for use.
In recent years, utilized Meta Materials to obtain develop rapidly to the research that wave beam regulates and controls, and Meta Materials can be made to have the refractive index of some abnormalities, as negative index or zero refractive index by design.In succession developed based on some novel beam scanning antennas of Meta Materials and high directional antenna.By can the effective control wave direction of propagating to the research of Meta Materials.
Summary of the invention
The object of this invention is to provide a kind of beam scanning array antenna with ultralow elevation angle characteristic, by the low elevation gain utilizing the wave beam modulating properties of Meta Materials to improve beam scanning array antenna.
In order to reach above object, a kind of beam scanning array antenna with ultralow elevation angle characteristic provided by the present invention, can be made up of by the array antenna of limited scanning and one deck Meta Materials lens that can realize wave beam Diffraction dispersion wave beam, the synthesis wave beam given off when array antenna, through Meta Materials lens, can produce a fixing additional deflection angle θ
0, and in certain angular domain, change beam position along with array antenna, the antenna main beam directional diagram at a ultralow elevation angle can be formed by the secondary wave beam of Meta Materials lens.
The Meta Materials lens of wave beam Diffraction dispersion line up array by the sub-wavelength structure unit transmitting phase place distribution gradient, and the transmission phase place of sub-wavelength structure unit meets 0 ° ~ 360 ° excursions.
In order to make main beam pointing elevation coverage reach 0 ° ~ 90 °, wherein 90 ° of sensings are expressed as main beam pointing and plane-parallel.The deviation angle θ of required Meta Materials lens
0span be 40 ° ~ 60 °, and meet
wherein
the transmission phase difference of adjacent structural units, k
0be vacuum wave vector, d is adjacent cells spacing.
There are the Meta Materials lens of wave beam Diffraction dispersion, the material used is double-sided copper-clad substrate, at the one side etching metal square opening dicyclo pattern of substrate, another side etching drum pattern, form plate lens by the mode of periodic arrangement, lens thickness is the lattice constant of a sub-wavelength structure unit.
Beam scanning array antenna can form array by type antenna unit such as micro-band, gap and waveguides, and its main beam scanning angle scope should be greater than ± and 45 °, relative 0 ° is main beam pointing angle when array antenna equiphase encourages.
Implement technical scheme of the present invention, there is following gain effect: the beam scanning array antenna with ultralow elevation angle characteristic significantly improves Planar Phased Array Antenna low elevation gain, and reduce antenna size, reduce cost, and go for various mounting platform.
Accompanying drawing explanation
A kind of beam scanning array antenna with ultralow elevation angle characteristic of Fig. 1 embodiment of the present invention
The tow sides structural representation of Fig. 2 sub-wavelength structure unit
Fig. 3 can provide the sub-wavelength structure unit group of 0 ° ~ 360 ° gradient transmission phase places
0 ° ~ 360 ° transmission phase places of Fig. 4 sub-wavelength structure unit group are with cell distribution distance change curve
Fig. 5 does not load the beam scanning array antenna directional diagram of the Meta Materials lens of wave beam Diffraction dispersion
Fig. 6 has loaded the beam scanning array antenna directional diagram of the Meta Materials lens of wave beam Diffraction dispersion
Embodiment
As shown in Figure 1, operating center frequency is f
0the beam scanning array antenna with ultralow elevation angle characteristic of=5GHz, its overall structure is made up of seven yuan of micro-strip array antennas 1 and the Meta Materials lens 2 with wave beam Diffraction dispersion, and wherein the Meta Materials lens 2 of wave beam Diffraction dispersion are formed by the mode stacked combination of sub-wavelength structure unit 3 by periodic arrangement.Each interlayer can be combined into one by mechanical connection, welding or the mode bonded.
Fig. 2 shows the tow sides structural representation of a sub-wavelength structure unit 3, and the baseplate material used is the thick double-sided copper-clad epoxy glass fiber resin of 1mm, and dielectric constant is 4.6mm, and loss angle tangent is 0.02.Pattern adopts circuit board etching technics to make, and wherein dash area is that copper region is covered in reservation.The physical dimension parameter of construction unit is depended in the transmission phase place of sub-wavelength structure unit 3 and impedance matching, in order to realize the transmission phase place of 0 ° ~ 360 °, the geometric parameter span of its Facad structure 3-1 is: d1=7.5 ~ 4.5mm, d2=7 ~ 3.5mm, s=d1-d2, w=0.2 ~ 1mm, g1=0.2 ~ 6mm, g2=0.2 ~ 6mm, 1=8mm; The geometric parameter span of its inverse layer structure 3-2 is: 12=7.5 ~ 3.5mm, w2=0.2 ~ 2mm, h=7.5 ~ 3.5mm.
Fig. 3 shows Facad structure 4-1 and the inverse layer structure 4-2 of the sub-wavelength structure unit group 4 that can provide 0 ° ~ 360 ° gradient transmission phase places, the sub-wavelength structure unit 3 of the various geometric of sub-wavelength structure unit group 4 corresponding to 12 change according to transmission phase gradient arrange and form, the spacing between sub-wavelength structure unit 3 is 8mm.The overall length P=96mm of sub-wavelength structure unit group 4.
With cell distribution distance change curve, Fig. 4 shows 0 ° ~ 360 ° of sub-wavelength structure unit group 4 transmission phase places can see that transmission phase place in sub-wavelength structure unit group 4 is with cell distribution distance linearly consecutive variations.
As shown in Figure 1, the Meta Materials lens 2 with wave beam Diffraction dispersion comprise 4 × 8 totally 32 groups of sub-wavelength structure unit groups 4 altogether, amount to 384 sub-wavelength structure unit 3.The overall length, width and height with the Meta Materials lens 2 of wave beam Diffraction dispersion are of a size of 384mm × 64mm × 8mm.
The Meta Materials lens 2 with wave beam Diffraction dispersion are directly covered in above seven yuan of micro-strip array antennas 1, can be combined into one by mechanical connection, welding or the mode bonded.
Fig. 5 and Fig. 6 to compared in the present embodiment the directional diagram before and after Meta Materials lens 2 that seven yuan of micro-strip array antennas 1 load wave beam Diffraction dispersion.As shown in Figure 5, when not loading the Meta Materials lens 2 of wave beam Diffraction dispersion, the wave beam maximum scan angle of seven yuan of micro-strip array antennas 1 is 50 degree, and has occurred interference graing lobe in-50 degree directions, and its 90 degree of positions and low elevation gain are-7dB.As shown in Figure 6, after the Meta Materials lens 2 loading wave beam Diffraction dispersion, seven yuan of micro-strip array antenna 1 wave beam maximum scan angles reach 90 degree, and the gain of this position reaches 10dB, and when relatively not loading, low elevation gain improves 17dB.Do not load the Meta Materials lens 2 of wave beam Diffraction dispersion if can predict and only rely on the mode increasing antenna aperture to reach identical gain, aerial array aperture area at least will increase by 50 times.The beam scanning array antenna of ultralow elevation angle characteristic that what therefore this patent provided have has the features such as high low elevation gain and compact.
Claims (5)
1. one kind has the beam scanning array antenna of ultralow elevation angle characteristic, be primarily characterized in that it can be made up of by the array antenna of limited scanning and one deck Meta Materials lens that can realize wave beam Diffraction dispersion wave beam, when the synthesis wave beam that array antenna gives off is by Meta Materials lens, a fixing additional deflection angle θ can be produced
0, and in certain angular domain, change beam position along with array antenna, the antenna main beam directional diagram at a ultralow elevation angle can be formed by the secondary wave beam of Meta Materials lens.
2. a kind of beam scanning array antenna with ultralow elevation angle characteristic according to claim 1, is characterized in that the main beam pointing elevation coverage of antenna can reach 0 ° ~ 90 °, and wherein 90 ° of sensings are expressed as main beam pointing and plane-parallel.
3. a kind of beam scanning array antenna with ultralow elevation angle characteristic according to claim 1, it is characterized in that the Meta Materials lens with wave beam Diffraction dispersion line up array by the sub-wavelength structure unit transmitting phase place distribution gradient, the sub-wavelength structure unit that each sub-wavelength structure unit group is the various geometric of 8mm by 12 spacing forms, the overall length P=96mm of sub-wavelength structure unit group, its transmission phase place meets the excursion of 0 ° ~ 360 °.
4. a kind of beam scanning array antenna with ultralow elevation angle characteristic according to claim 1, is characterized in that the Meta Materials lens with wave beam Diffraction dispersion, its deviation angle θ
0span be 40 ° ~ 60 °, and meet
wherein
the transmission phase difference of adjacent structural units, k
0be vacuum wave vector, d is adjacent cells spacing.
5. a kind of beam scanning array antenna with ultralow elevation angle characteristic according to claim 1, it is characterized in that the Meta Materials lens with wave beam Diffraction dispersion, the sub-wavelength structure unit comprised adopts circuit board printing process to be made on double-sided copper-clad substrate, at the one side etching metal square opening dicyclo pattern of substrate, another side etching drum pattern, form plate lens by the mode of periodic arrangement, lens thickness is the lattice constant of a sub-wavelength structure unit.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105322287A (en) * | 2015-10-13 | 2016-02-10 | 中国人民解放军空军工程大学 | Phase gradient super-surface based surface plasmon planar antenna |
| GB2556083A (en) * | 2016-11-17 | 2018-05-23 | Bae Systems Plc | Antenna assembly |
| GB2556084A (en) * | 2016-11-17 | 2018-05-23 | Bae Systems Plc | Antenna assembly |
| CN109786969A (en) * | 2019-01-10 | 2019-05-21 | 电子科技大学 | A kind of low RCS phased array antenna based on load artificial electromagnetic material |
| CN111742446A (en) * | 2018-02-02 | 2020-10-02 | 三星电子株式会社 | Antenna module including reflector and electronic device including the same |
| WO2020253516A1 (en) * | 2019-05-09 | 2020-12-24 | 深圳光启尖端技术有限责任公司 | Metamaterial electronic scanning antenna |
| CN114168014A (en) * | 2021-11-02 | 2022-03-11 | 深圳市鹏汇智能科技有限公司 | Intelligent super surface based on RFID technology and control method thereof |
| CN115621741A (en) * | 2022-10-28 | 2023-01-17 | 惠州硕贝德无线科技股份有限公司 | Phased array antenna, radio frequency wireless circuit and 5G mobile device |
| CN114168014B (en) * | 2021-11-02 | 2024-04-30 | 深圳市鹏汇智能科技有限公司 | Intelligent super-surface based on RFID technology and control method thereof |
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| WO2020253516A1 (en) * | 2019-05-09 | 2020-12-24 | 深圳光启尖端技术有限责任公司 | Metamaterial electronic scanning antenna |
| CN114168014A (en) * | 2021-11-02 | 2022-03-11 | 深圳市鹏汇智能科技有限公司 | Intelligent super surface based on RFID technology and control method thereof |
| CN114168014B (en) * | 2021-11-02 | 2024-04-30 | 深圳市鹏汇智能科技有限公司 | Intelligent super-surface based on RFID technology and control method thereof |
| CN115621741A (en) * | 2022-10-28 | 2023-01-17 | 惠州硕贝德无线科技股份有限公司 | Phased array antenna, radio frequency wireless circuit and 5G mobile device |
| CN115621741B (en) * | 2022-10-28 | 2023-12-15 | 惠州硕贝德无线科技股份有限公司 | Phased array antenna, radio frequency wireless circuit and 5G mobile device |
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Application publication date: 20150401 |