CN106410419A - Meta-material technology based low-grating lobe planar array antenna - Google Patents
Meta-material technology based low-grating lobe planar array antenna Download PDFInfo
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- CN106410419A CN106410419A CN201610816515.8A CN201610816515A CN106410419A CN 106410419 A CN106410419 A CN 106410419A CN 201610816515 A CN201610816515 A CN 201610816515A CN 106410419 A CN106410419 A CN 106410419A
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- meta materials
- array antenna
- cover plate
- flat plate
- meta
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
- H01Q15/0086—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices having materials with a synthesized negative refractive index, e.g. metamaterials or left-handed materials
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/061—Two dimensional planar arrays
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- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention relates to a meta-material technology based low-grating lobe planar array antenna. Grating lobes may occur in a radiation pattern of a planar array antenna of a big-circle array, and reduction of the antenna efficiency is accordingly resulted. According to the meta-material technology based low-grating lobe planar array antenna, a meta-material cover plate is designed and is loaded on the array surface of the planar array antenna. The base material of the meta-material cover plate is a low-loss dielectric flat plate; the cover plate contains a large number of lengthways holes with sub-wavelength and in periodic arrangement. The meta-material cover plate can suppress the grating lobe electric level of the planar array antenna, can increase gain and aperture efficiency of the planar antenna array and can be used as a broadband.
Description
Technical field
The invention belongs to the field such as satellite communication, scouting antagonism, mobile communication, it is related to a kind of low based on Meta Materials technology
Graing lobe flat plate array antenna.
Background technology
Flat plate array antenna is widely used in mobile satellite communication and scouts in antagonism.The radiation actinal surface of flat plate array antenna
For plane,, by antenna element two-dimension periodic arrangement form, the width of antenna array and height can be with flexible configuration for it.Compare reflection
Surface antenna, flat plate array antenna easily realizes 4：1 or even bigger the ratio of width to height.The antenna of this form is suitable for being loaded into mobile load
In body platform, there is the technical advantage of low profile.
The group battle array cycle of flat plate array antenna is frequently larger than a wavelength.The flat plate array antenna of large period group battle array have with
Lower advantage：Feeding network design is simple, insertion loss is little；Under equal swept area, using the flat board battle array of large period group battle array
Array antenna, its antenna element number is few, and processing cost is low, lightweight.
The inferior position of the flat plate array antenna of large period group battle array is：The antenna pattern of antenna occurs graing lobe, leads to antenna
Efficiency declines.
Cross metal wire structure is loaded on array antenna actinal surface, can substantially reduce the radiation graing lobe of antenna.The program
It has been successfully applied to the flat plate array antenna of Ku satellite communication frequency range, its receives frequency is 12.25-12.75GHz, transmitting frequency
Rate is 14.0-14.5GHz.The limitation of this technical scheme is that bandwidth of operation is narrow, and the relative bandwidth that it is suitable for is about 20%.Right
Work in the flat plate array antenna of Ka satellite communication frequency range, its receives frequency is 19.6-21.2GHz, tranmitting frequency is 29.4-
31.0GHz, relative bandwidth about 50%, the technical scheme of cross hair design is no longer applicable.
Content of the invention
It is an object of the invention to designing a kind of low graing lobe flat plate array antenna based on Meta Materials technology, this antenna comprises
The flat plate array antenna of large period group battle array radiates the Meta Materials cover plate at actinal surface with loading on flat plate array antenna.Meta Materials cover plate
The field distribution of radiation actinal surface can be adjusted, reduce the graing lobe level of antenna pattern, improve gain and the mouth of flat plate array antenna
Face efficiency.
The technical solution used in the present invention is：
A kind of low graing lobe flat plate array antenna based on Meta Materials technology, comprises the flat plate array antenna 1 of large period group battle array
Radiate the Meta Materials cover plate 2 on actinal surface with loading on flat plate array antenna 1；Described flat plate array antenna 1 is by multiple flat board battle arrays
Array antenna unit forms；Described Meta Materials cover plate 2 is formed by the construction unit periodic arrangement of multiple 90 ° of rotational symmetries；
Each construction unit comprises multiple airports opening up along antenna array normal direction, and all airports annularly arrange, airport
Size become larger from inner ring to outer shroud；The repetition period of the construction unit of Meta Materials cover plate 2 and flat plate array antenna unit
The group battle array cycle consistent.
Wherein, the base material of described Meta Materials cover plate 2 is low-loss microwave-medium flat board.
Wherein, the upper surface of described Meta Materials cover plate 2 is additionally provided with upper strata Meta Materials cover plate, upper strata Meta Materials cover plate and super material
Material cover plate 2 structure is identical.
Wherein, leave the air gap 3 between upper strata Meta Materials cover plate and lower floor's Meta Materials cover plate, the height of the air gap is
0.05-0.12 wavelength.
Compared to background technology, its advantage is the present invention：
(1) technical scheme based on Meta Materials being capable of wideband operation.The relative bandwidth of operation of the program is more than 1.6 frequencys multiplication.
When the program is applied to satellite communication field, disclosure satisfy that the bandwidth requirement of Ka band satellite communication.
(2) the bigger group battle array cycle be can adapt to based on the technical scheme of Meta Materials.It is more than two wavelength when the group battle array cycle
When, this technical scheme is still feasible.
Brief description
Fig. 1 is the flat plate array antenna schematic diagram not loading Meta Materials cover plate.
Fig. 2 is the side view of the flat plate array antenna loading Meta Materials cover plate.
Fig. 3 is the top view of Meta Materials cover plate, corresponding 3 × 3 flat plate array antenna units.
Specific embodiment
With reference to Fig. 1 to Fig. 3, the invention will be further described.But protection scope of the present invention is not limited to described reality
Apply example.
The present invention proposes a kind of low graing lobe flat plate array antenna based on Meta Materials technology, by the Meta Materials lid of particular design
Plate loads at the radiation actinal surface of the flat plate array antenna of large period group battle array.The base material of Meta Materials cover plate is low-loss microwave dielectric
Flat board, such as polytetrafluoroethylene (PTFE), polystyrene, media plate contains the air along antenna array normal direction of a large amount of periodic arrangement
Hole.Meta Materials cover plate can adjust the field distribution of radiation actinal surface, thus reducing the graing lobe level of antenna pattern, improves flat board battle array
The gain of array antenna and aperture efficiency.The metamaterial modular construction that cover plate uses is disresonance unit, has broadband character.This
Bright can apply to Ka satellite communication frequency range, simultaneously cover receive and transmitting frequency range.
As shown in figure 1, as an embodiment, the flat plate array antenna 1 not loading Meta Materials cover plate is by metal waveguide mouth
Cycle arrangement forms, and described flat plate array antenna 1 is made up of multiple flat plate array antenna units；Flat plate array antenna has work
Make bandwidth, processing technology is ripe, can bear the characteristics such as high power.Flat plate array antenna is structured the formation using large period, to work frequency
The high end frequency of band, its electric size is more than 2 wavelength.The feeding network of this flat plate array antenna is simple, and design difficulty is little.Flat
The antenna element of plate array antenna can select all kinds of antenna form such as loudspeaker, micro-strip, Waveguide slot.Wherein, bell-mouth antenna
There is working band width, processing technology is ripe, can bear the characteristics such as high power, be most widely used in engineering.
As shown in Fig. 2 the top of Meta Materials cover plate 2 is additionally provided with upper strata Meta Materials cover plate, Meta Materials cover plate 2 loads on flat board
Array antenna radiates actinal surface, and the lower surface of Meta Materials cover plate 2 is fitted tightly with the upper surface of flat plate array antenna 1；The super material in upper strata
Material cover plate identical with Meta Materials cover plate 2 structure, construction unit corresponding setting up and down, between leave the air gap 3, the air gap
Height dimension be 0.05-0.12 wavelength, this double layer design can reduce the return loss that Meta Materials cover plate leads to, favorably
Impedance matching when realizing electromagenetic wave radiation.
As shown in figure 3, every layer of Meta Materials cover plate 2 is formed by the construction unit periodic arrangement of multiple 90 ° of rotational symmetries,
The repetition period of construction unit is consistent with the group battle array cycle of flat plate array antenna unit；Each construction unit is along antenna array normal
Direction offers multiple airports, and airport annularly arranges, and the size of airport becomes larger from inner ring to outer shroud, this Jie
The metamaterial modular construction of matter open-cellular form has disresonance characteristic, can be with wideband operation.As an embodiment, Meta Materials lid
The base material selection of plate is low-loss microwave-medium such as polytetrafluoroethylene (PTFE), polystyrene, and this dielectric material can be in high frequency condition
Lower work, Dielectric loss tangent is less than 0.1%, and the Insertion Loss introducing antenna system is little, stable performance, has good environment and adapts to
Property；Embodiment airport is circular hole, using mechanical means processing, technical maturity.Embodiment Fig. 3 lower right corner dotted line indicates excess of export
One array element of material cover plate, the component units of Meta Materials cover plate comprise the air hole array of 4 side's annulars.From inner ring to
Outer shroud, the size of airport becomes big from little.
Claims (4)
1. a kind of low graing lobe flat plate array antenna based on Meta Materials technology, comprises the flat plate array antenna (1) of large period group battle array,
Described flat plate array antenna (1) is made up of multiple flat plate array antenna units；It is characterized in that：Also include loading on flat board battle array
Array antenna (1) radiates the Meta Materials cover plate (2) on actinal surface；Described Meta Materials cover plate (2) is by the knot of multiple 90 ° of rotational symmetries
Structure unit periodic arrangement forms；Each construction unit comprises multiple airports opening up along antenna array normal direction, is had time
Pore annularly arranges, and the size of airport becomes larger from inner ring to outer shroud；The repetition of the construction unit of Meta Materials cover plate (2)
Cycle is consistent with the group battle array cycle of flat plate array antenna unit.
2. a kind of low graing lobe flat plate array antenna based on Meta Materials technology according to claim 1 it is characterised in that：Institute
The base material stating Meta Materials cover plate (2) is low-loss microwave-medium flat board.
3. a kind of low graing lobe flat plate array antenna based on Meta Materials technology according to claim 1 it is characterised in that：Institute
The upper surface stating Meta Materials cover plate (2) is additionally provided with upper strata Meta Materials cover plate, upper strata Meta Materials cover plate and Meta Materials cover plate (2) structure
Identical.
4. a kind of low graing lobe flat plate array antenna based on Meta Materials technology according to claim 3 it is characterised in that：On
The air gap (3) is left, the height of the air gap is 0.05-0.12 ripple between layer Meta Materials cover plate and lower floor's Meta Materials cover plate
Long.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610816515.8A CN106410419B (en) | 2016-09-12 | 2016-09-12 | A kind of low graing lobe flat plate array antenna based on Meta Materials technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610816515.8A CN106410419B (en) | 2016-09-12 | 2016-09-12 | A kind of low graing lobe flat plate array antenna based on Meta Materials technology |
Publications (2)
| Publication Number | Publication Date |
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| CN106410419A true CN106410419A (en) | 2017-02-15 |
| CN106410419B CN106410419B (en) | 2019-05-31 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1945897A (en) * | 2006-10-17 | 2007-04-11 | 东南大学 | Loaded filter antenna based on bellmouthing face frequency selective surface |
| CN103151579A (en) * | 2013-03-19 | 2013-06-12 | 中国科学院空间科学与应用研究中心 | Broadband sub-millimeter wave frequency selection surface based on fractal structure |
| CN103762425A (en) * | 2013-11-04 | 2014-04-30 | 航天恒星科技有限公司 | Double-frequency double-circular polarization common-caliber antenna array for two-dimensional phase control scanning |
| CN103762423A (en) * | 2014-01-24 | 2014-04-30 | 中国科学院光电技术研究所 | Reflection array antenna beam scanning antenna based on rotary phase shift surface technology |
| WO2014160322A1 (en) * | 2013-03-14 | 2014-10-02 | Impinj, Inc. | Powering rfid tags using multiple systhesized-beam rfid readers |
-
2016
- 2016-09-12 CN CN201610816515.8A patent/CN106410419B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1945897A (en) * | 2006-10-17 | 2007-04-11 | 东南大学 | Loaded filter antenna based on bellmouthing face frequency selective surface |
| WO2014160322A1 (en) * | 2013-03-14 | 2014-10-02 | Impinj, Inc. | Powering rfid tags using multiple systhesized-beam rfid readers |
| CN103151579A (en) * | 2013-03-19 | 2013-06-12 | 中国科学院空间科学与应用研究中心 | Broadband sub-millimeter wave frequency selection surface based on fractal structure |
| CN103762425A (en) * | 2013-11-04 | 2014-04-30 | 航天恒星科技有限公司 | Double-frequency double-circular polarization common-caliber antenna array for two-dimensional phase control scanning |
| CN103762423A (en) * | 2014-01-24 | 2014-04-30 | 中国科学院光电技术研究所 | Reflection array antenna beam scanning antenna based on rotary phase shift surface technology |
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| CN106410419B (en) | 2019-05-31 |
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