CN202103167U - Flat lens antenna based on magnetic resonance structure - Google Patents
Flat lens antenna based on magnetic resonance structure Download PDFInfo
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- CN202103167U CN202103167U CN2011201628132U CN201120162813U CN202103167U CN 202103167 U CN202103167 U CN 202103167U CN 2011201628132 U CN2011201628132 U CN 2011201628132U CN 201120162813 U CN201120162813 U CN 201120162813U CN 202103167 U CN202103167 U CN 202103167U
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- magnetic resonance
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- medium substrate
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Abstract
The utility model relates to a flat lens antenna based on a magnetic resonance structure, comprising a plurality of parallel and equidistantly arranged medium substrates, wherein the plane where the medium substrates are located is perpendicular to the incident direction of electromagnetic waves, between two adjacent medium substrates there is provided a filler with magnetic parameters similar to that of air, one side of the medium substrate is provided with square structure units uniformly arranged along a transverse direction and a vertical direction, each structure unit is provided with a square opening resonance ring formed by cladding copper lines, the opening of the opening resonance ring faces down, and the cladding copper lines at both sides of the opening extend upwards into the ring. The flat lens antenna based on a magnetic resonance structure is of three-dimensional anisotropy, and can satisfy the wave impedance matching between a lens and air in the incident direction, thereby reducing reflection; and when the lens is arranged at the opening surface of an antenna to be measured, the directionality of the H surface directional diagram of the antenna to be measured can be increased.
Description
Technical field
The utility model relates to a kind of flat-plate lens antenna based on the magnetic resonance structure.
Background technology
Novel artificial electromagnetic material (Metamaterials or the ultra material of title) is that the artificial material that is constituted is arranged on sub-wavelength macroscopic view elementary cell periodicity or aperiodicity ground with geometry in particular.In simple terms, use orderly artificial unit " particle " to replace the elementary particles such as molecule/atom of nature material exactly, form a kind of equivalent material.Theory analysis and experimental result show that when the physical dimension of elementary cell was in sub-wavelength yardstick (1/10 wavelength), the novel artificial electromagnetic material demonstrated the medium characteristic of macroscopic view.Compare with the traditional sense material, the medium characteristic of novel artificial electromagnetic material depends on the spatial distribution of its basic cell structure and unit.
The maximum characteristics of novel artificial electromagnetic material are to change macroscopical electromagnetic attributes of artificial material through the shape of controlling artificial elementary cell, the formation of unit material.As everyone knows, the electromagnetic attributes of all material can be described with DIELECTRIC CONSTANTS and magnetic permeability μ.But the value of occurring in nature DIELECTRIC CONSTANTS and magnetic permeability μ is limited, promptly we can not arbitrary control DIELECTRIC CONSTANTS and magnetic permeability μ change material behavior.And in this novel artificial electromagnetic material, its equivalent ε and μ of may command then, make its can for just, can be for negative even be zero; Also may command its form certain variation (for example gradual change, sudden change etc.) as required.In addition, we can also pass through control structure unit itself, make material be anisotropy.
2002; When people such as S.Enoch have proposed as if two-dimentional line source is placed two dimension zero refraction materials; It is high to improve its directionality, and radiation lobe narrow (Enoch S., et al.A metama terial for directive emission [J] .Physical Review Letters; 2002,89:213902.).But because isotropic zero refraction materials can't mate with air layer, this just causes radiation efficiency lower.2009, people such as Ma proposed utilization anisotropy zero refraction materials theoretically and have improved electromagnetic directionality and efficient (Ma YG, Wang P; Chen X; Et al.Near-field plane-wave-like beam emitting antenna fabricated by anisotropic metamaterial [J], Applied Physics Letters, 2009; 94 (4): 044107.), thereby efficiently solve zero refraction materials and the unmatched problem of air layer.2010, human experimental verifications such as Cheng Qiang people's such as Ma theory (Cheng Q, Jiang WX; Cui TJ, Radiation of planar electromagnetic waves by a line source in anisotropic MTMs [J], Journal Of Physics D-Applied Physics; 2010,43 (33): 335406.), but be confined to two-dimensional case; Electromagnetic radiation source must place in the middle of the material, can not directly be used to improve the directionality of traditional antenna.The utility model utilization magnetic resonance structure realizes that anisotropic zero refraction materials processes the three-dimensional flat plate lens, can directly be placed on the bore of traditional antenna, and like horn antenna, microstrip antenna etc. improve the directionality of their H face far-field patterns.
The utility model content
Technical problem: the utility model provides a kind of three-dimensional anisotropy; Can be in the wave impedance coupling that satisfies on the incident direction between lens and the air; Thereby reduce reflection; Magnetic permeability is zero on direction of wave travel, can improve the direction-sense flat-plate lens antenna based on the magnetic resonance structure of antenna H face to be measured.
Technical scheme: based on the flat-plate lens antenna of magnetic resonance structure; Comprise the medium substrate that a plurality of parallel equidistant are arranged; The plane at said medium substrate place is vertical with the electromagnetic wave incident direction; Be provided with electromagnetic parameter and the approaching filler of air between two adjacent media substrates, the one side of said medium substrate is provided with along horizontal and vertical evenly distributed square structure unit, and each said construction unit is provided with and covers the split ring resonator that copper cash constitutes.
In the utility model, the profile of split ring resonator is the square of opening, and Open Side Down for split ring resonator, and the copper cash that covers of opening both sides extends upward to ring.
In the utility model; The thickness of medium substrate is sub_h, and the length of side of said cellular construction is sub_a, and the span of sub_a is λ/10-λ/6; λ is the wavelength of corresponding frequency, and the spacing of two adjacent media substrates is 0.8 * (sub_a-sub_h) to 1.2 * (sub_a-sub_h).
Beneficial effect: the three-dimensional anisotropy of the flat-plate lens antenna of the utility model, can mate in the wave impedance that satisfies on the incident direction between lens and the air, thereby reduce reflection; When covering the flat-plate lens antenna of the utility model on the tradition antenna actinal surface to be measured; Lens antenna realizes that on direction of wave travel magnetic permeability levels off to 0; All the other components of electromagnetic parameter approach 1, and the directionality of the H face far-field pattern of traditional antenna to be measured can be improved significantly.
Description of drawings
Fig. 1 is the yz floor map of the flat-plate lens antenna of the utility model, supposes that electromagnetic wave propagates along the z direction.
Fig. 2 is the part plan sketch map of the monolithic medium substrate of the utility model.
Fig. 3 is the cellular construction floor map, and the length of side of cellular construction is sub_a, and the length of side of split ring resonator SRR is srr_a; Covering copper line width is w; The length of covering the copper cash extension is b, and the aperture pitch of split ring resonator is g, and the radius of 90 ° of circular arcs that split ring resonator is four jiaos is r.
The sketch map that boundary condition was provided with when Fig. 4 extracted the equivalent permeability z durection component of SRR structure for the utility model; The x direction is set to the open boundary condition; The y direction is set to electric wall boundary condition, and the z direction is set to magnetic wall boundary condition, and wherein the z direction is a direction of wave travel.
Fig. 5 is the z durection component parameter extraction figure as a result of the utility model SRR structural equivalents magnetic permeability, and wherein abscissa is a frequency, and ordinate is a magnetic permeability, and solid line is represented real part, and dotted line is represented imaginary part.
Fig. 6 is the y durection component parameter extraction figure as a result of the utility model SRR structural equivalents dielectric constant, and wherein abscissa is a frequency, and ordinate is a dielectric constant, and solid line is represented real part, and dotted line is represented imaginary part.
Fig. 7 is the x durection component parameter extraction figure as a result of the utility model SRR structural equivalents magnetic permeability, and wherein abscissa is a frequency, and ordinate is a magnetic permeability, and solid line is represented real part, and dotted line is represented imaginary part.
Fig. 8 extracts figure as a result for the utility model wave impedance parameter, and wherein abscissa is a frequency, and ordinate is a wave impedance, and solid line is represented real part, and dotted line is represented imaginary part.
Fig. 9 is a horn antenna H face far-field pattern, and wherein solid line is the directional diagram of empty loudspeaker, and dotted line is the directional diagram that adds horn antenna behind the utility model lens antenna.
Have among the figure: medium substrate 1, filler 2, construction unit 3.
Embodiment
Below in conjunction with accompanying drawing the utility model is further specified.
Flat-plate lens antenna based on the magnetic resonance structure; Comprise the medium substrate 1 that a plurality of parallel equidistant are arranged, said medium substrate 1 can cover the actinal surface of traditional antenna to be measured, and the plane at medium substrate 1 place is vertical with the electromagnetic wave incident direction; Be provided with the approaching filler 2 of electromagnetic parameter and air between two adjacent media substrates; The one side of said medium substrate 1 is provided with along horizontal and vertical evenly distributed square structure unit 3, and each said construction unit 3 is provided with and covers the split ring resonator SRR structure that copper cash constitutes, and described split ring resonator SRR structure is a square; Open Side Down for split ring resonator, and the copper cash that covers of opening both sides extends upward to ring.The thickness of said medium substrate is sub_h; The length of side of said cellular construction is sub_a; The span of sub_a is λ/10-λ/6, and λ is the wavelength of corresponding frequency, and the spacing of two adjacent media substrates is 0.8 * (sub_a-sub_h) to 1.2 * (sub_a-sub_h).
In the utility model, the copper that covers of medium substrate one side etches away fully, and another side covers copper with part and etches away, and makes the remaining copper formation of covering cover copper cash; Constitute split ring resonator SRR structure, in each cellular construction, split ring resonator is as shown in Figure 2; Wherein: the length of side of cellular construction is sub_a, and the length of side of split ring resonator SRR is srr_a, and covering copper line width is w; The length of covering the copper cash extension is b, and the aperture pitch of split ring resonator is g, and the radius of 90 ° of circular arcs that split ring resonator is four jiaos is r.Suppose that direction of wave travel is the z direction, the magnetic resonance cellular construction is along x direction and (periodically) arrangement equably of y direction, and the unit number of x direction and y direction confirms that according to the bore of antenna to be measured medium substrate needs greater than antenna aperture, and covers whole actinal surface.Medium substrate is used FR4 (FR-4 epoxy glass cloth laminated board) or F4B (polytetrafluoroethylene (PTFE) high-frequency microwave circuit board material) usually, and the material with other also is fine certainly.The thickness of medium substrate has certain requirement to technology, but as long as confirm the material and the thickness of medium substrate, can meet the demands through the parameter of regulon structure basically.Each medium substrate is arranged along the z direction, and for fixed sample, the gap between layer and the layer need be filled with material like electromagnetic parameter and the proximal air.
The making of the utility model lens antenna and definite cellular construction are following with the concrete grammar that covers the copper cash dimensional parameters:
The first step, according to given frequency, the resonance that makes the magnetic resonance structure is around given frequency, and its S parameter of available business software CST simulated extraction is observed.In experimental verification, our setpoint frequency is 9.4GHz, must guarantee that electromagnetic wave passes the SRR structure, and the extended structure of electric field in the middle of need being parallel to, and to avoid magnetic resonance.In emulation, if being provided with of magnetic resonance Boundary Conditions in Structures is as shown in Figure 3, promptly magnetic direction is perpendicular to the structural plan of SRR, and direction of an electric field is parallel to middle extended structure, and what extracted this moment is the magnetic permeability of z direction and the dielectric constant of y direction.Through each parameter of adjustment structure, the resonance frequency of S parameter is transferred near the given frequency.
In second step, whether other components of observing dielectric constant and magnetic permeability approach 1.If the value of other components is too big or too little, all can cause the impedance between air layer and the lens not match, thereby make reflection excessive, influence lens efficiency.For transverse electric field mode (TE mould), mainly consider ε
z, ε
x, μ
yThree components; For transverse magnetic pattern (TM mould), mainly consider μ
z, μ
x, ε
yThree components.That our sample is realized is μ
zBe zero, mainly act on the TM mould, so emphasis is considered μ
z, μ
x, ε
yThree components and wave impedance.
In the 3rd step, for the SRR structure, the parameter that influences its performance mainly comprises: the length of side sub_a of SRR cellular construction, and the length of side srr_a of institute's etching structure is attend in the unit, the brachium b of extended structure, the spacing g of two arms, live width w,, the radius r of 90 ° of circular arcs on four angles.The excursion of sub_a is λ/10-λ/6 (wherein λ representes the wavelength of corresponding frequency), and the excursion of srr_a is consistent with sub_a, but is less than sub_a, and w and g minimum are 0.1mm (process technology limit).Through regulating these parameters, realize that at the f=9.4GHz place z durection component of magnetic permeability is 0, all the other components of electromagnetic parameter approach 1 basically.In the experimental verification of the utility model, dimensional parameters is: sub_a=3.8mm, and g=0.2mm, b=1.8mm, r=0.5mm, srr_a=2.5mm, w=0.16mm, the thickness that covers copper is 0.018mm, and the thickness sub_h of medium substrate is 0.2, and dielectric constant is 2.65.The extraction of three components of its electromagnetic parameter such as Fig. 4-shown in Figure 7, when f=9.4GHz, μ
z≈ 0, μ
y=0.98, ε
x=1.6, wave impedance is 0.78, meets the demands.
In the 4th step, manufacture sample.Medium substrate shape and required unit number confirm that according to antenna aperture to be measured Fig. 1 is the partial schematic diagram in the monolithic dielectric-slab xy plane.The number of plies of the medium substrate that z direction equidistance is arranged is at least 2 layers, and the span of two adjacent media substrate spacings is 0.8 * (sub_a-sub_h) to 1.2 * (sub_a-sub_h), and we are taken as a-sub_h in the experiment.
The 5th step, experiment test.Here test with the standard horn of X-band, the utilization sample improves the directionality of its H face far-field pattern, and the E face is not had influence basically.Fig. 8 is the comparison diagram at bell-mouthed H face directional diagram.Wherein solid line is represented the test result figure of empty loudspeaker, and dotted line representes to add the later test result of lens.From figure, can see that added after the lens, the beamwidth of loudspeaker has reduced by 38%, has significantly improved its directionality.
Claims (3)
1. flat-plate lens antenna based on the magnetic resonance structure; It is characterized in that; This lens antenna comprises the medium substrate (1) that a plurality of parallel equidistant are arranged; The plane at said medium substrate (1) place is vertical with the electromagnetic wave incident direction; Be provided with the approaching filler (2) of electromagnetic parameter and air between two adjacent media substrates, the one side of said medium substrate (1) is provided with along horizontal and vertical evenly distributed square structure unit (3), and each said construction unit (3) is provided with and covers the split ring resonator that copper cash constitutes.
2. according to the said a kind of flat-plate lens antenna based on the magnetic resonance structure of claim 1, it is characterized in that the profile of said split ring resonator is the square of opening, Open Side Down for split ring resonator, and the copper cash that covers of opening both sides extends upward to ring.
3. according to the said a kind of flat-plate lens antenna of claim 1 based on the magnetic resonance structure; It is characterized in that; The thickness of said medium substrate is sub_h, and the length of side of said cellular construction is sub_a, and the span of sub_a is λ/10 1 λ/6; λ is the wavelength of corresponding frequency, and the spacing of two adjacent media substrates is 0.8 * (sub_a-sub_h) to 1.2 * (sub_a-sub_h).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011201628132U CN202103167U (en) | 2011-05-18 | 2011-05-18 | Flat lens antenna based on magnetic resonance structure |
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| CN2011201628132U CN202103167U (en) | 2011-05-18 | 2011-05-18 | Flat lens antenna based on magnetic resonance structure |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664314A (en) * | 2012-05-25 | 2012-09-12 | 哈尔滨工业大学 | Zero-refraction microwave lens based on electromagnetic double resonance structure |
| CN103296433A (en) * | 2012-02-29 | 2013-09-11 | 深圳光启创新技术有限公司 | Metamaterial |
| CN104638366A (en) * | 2015-01-21 | 2015-05-20 | 北京理工大学 | Low-coupling-degree multi-antenna system |
| CN110011695A (en) * | 2014-03-17 | 2019-07-12 | 优倍快网络公司 | Electron lens equipment, the operating method of electron lens and phased array antenna equipment |
| US11303037B2 (en) | 2015-10-09 | 2022-04-12 | Ubiquiti Inc. | Synchronized multiple-radio antenna systems and meihods |
| US11303016B2 (en) | 2014-10-14 | 2022-04-12 | Ubiquiti Inc. | Multi-sector antennas |
| US11336342B2 (en) | 2015-02-23 | 2022-05-17 | Ubiquiti Inc. | Radio apparatuses for long-range communication of radio-frequency information |
-
2011
- 2011-05-18 CN CN2011201628132U patent/CN202103167U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103296433A (en) * | 2012-02-29 | 2013-09-11 | 深圳光启创新技术有限公司 | Metamaterial |
| CN102664314A (en) * | 2012-05-25 | 2012-09-12 | 哈尔滨工业大学 | Zero-refraction microwave lens based on electromagnetic double resonance structure |
| CN110011695A (en) * | 2014-03-17 | 2019-07-12 | 优倍快网络公司 | Electron lens equipment, the operating method of electron lens and phased array antenna equipment |
| CN110011695B (en) * | 2014-03-17 | 2021-11-16 | 优倍快公司 | Electronic lens apparatus, electronic lens operation method, and phased array antenna apparatus |
| US11296407B2 (en) | 2014-03-17 | 2022-04-05 | Ubiqsiti Inc. | Array antennas having a plurality of directional beams |
| US11303016B2 (en) | 2014-10-14 | 2022-04-12 | Ubiquiti Inc. | Multi-sector antennas |
| CN104638366A (en) * | 2015-01-21 | 2015-05-20 | 北京理工大学 | Low-coupling-degree multi-antenna system |
| US11336342B2 (en) | 2015-02-23 | 2022-05-17 | Ubiquiti Inc. | Radio apparatuses for long-range communication of radio-frequency information |
| US11303037B2 (en) | 2015-10-09 | 2022-04-12 | Ubiquiti Inc. | Synchronized multiple-radio antenna systems and meihods |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120104 Termination date: 20120518 |