CN103500885A - X-waveband broadband high-gain low-cross-polarization dual-polarization micro-strip antenna array - Google Patents
X-waveband broadband high-gain low-cross-polarization dual-polarization micro-strip antenna array Download PDFInfo
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Abstract
The invention discloses an X-waveband broadband high-gain low-cross-polarization dual-polarization micro-strip antenna array. The dual-polarization micro-strip antenna array is composed of a left-handed material coating layer, an inverted parasitic patch layer, a Rohacell31HF foam supporting layer, an antenna horizontal polarization coplanar waveguide feeder layer with a radiating element, an antenna vertical polarization slot coupling feeder layer, a micro-strip antenna array fixing cavity, a metal baffle-board and a radio-frequency connector set in sequence. According to the X-waveband broadband high-gain low-cross-polarization dual-polarization micro-strip antenna array, new technologies such as a photonic crystal structure and the left-handed material coating layer are adopted, the parasitic patch is additionally arranged, and an antenna array feed network is skillfully designed, so that the X-waveband broadband high-gain low-cross-polarization dual-polarization micro-strip antenna array has the good electrical performance of being wide in frequency band, high in isolation degree, high in gain, low in cross polarization electrical level, low in grating lobe electrical level and the like, is low in weight, low in outline and easy to manufacture, and can be combined with an active device easily.
Description
Technical field
The invention belongs to the radar communication technical field, relate to a kind of Dual-polarized Micro Strip Array row, especially a kind of X-band wide band high-gain, the low ultimate ratio Dual-polarized Micro Strip Array row of handing over.
Background technology
In radar communications system, the performances such as sensitivity, distance and bearing resolution, image blur degree and mapping bandwidth for improving system, require to use to have dual polarization, broadband, high-isolation, low-cross polarization level, high efficiency active phase array antenna.
In prior art, this antenna mostly adopts the Waveguide slot battle array to realize, its technology is relatively ripe, can realize good port isolation and cross polarization characteristics, but its structure is heavier, processed complex, is used in particular on satellite, be subject to the restrictions such as space, weight, can not do too greatly.
Patent content of the present invention
The purpose of patent of the present invention is to overcome the shortcoming of above-mentioned prior art, a kind of X-band wide band high-gain, the low ultimate ratio Dual-polarized Micro Strip Array row of handing over are provided, it adopts the new technologies such as photon crystal structure, left-handed materials coating, reach the ingehious design to the antenna array feeding network by increasing parasitic patch again, make it there is the good electric properties such as broadband, high-isolation, high-gain, low-cross polarization level and low graing lobe level, simultaneously lightweight, profile is low, manufacture is simple, easily with active device, combine.
The purpose of patent of the present invention solves by the following technical programs:
This X-band wide band high-gain, the low ultimate ratio Dual-polarized Micro Strip Array leu time handed over are by: left-handed materials coating, inverted parasitic patch layer, Rohacell31HF foam support layer, form containing antenna horizontal polarization coplanar wave guide feedback layer, antenna perpendicular polarization aperture-coupled layer, microstrip antenna array fixed cavity, metallic reflection plate and the radio frequency connector group of radiating element.
The pitching ground roll beam width of above-mentioned every row radiating element is 7 °, gain 15dBi.
Above-mentioned left-handed materials coating, parasitic patch layer, Rohacell31HF foam support layer, antenna horizontal polarization coplanar wave guide feedback layer are bonded together by conducting resinl and are embedded on the corresponding installation step of microstrip antenna array fixed cavity together with antenna perpendicular polarization aperture-coupled layer, metallic reflection plate by nonmetal screw is fixed; Described radio frequency connector bond pads is on antenna perpendicular polarization aperture-coupled layer, and the position boring corresponding with radio frequency connector on the radio frequency connector group on the metallic reflection plate, pass radio frequency connector smoothly.
Above-mentioned inverted parasitic patch layer, antenna horizontal polarization coplanar wave guide feedback layer, antenna perpendicular polarization aperture-coupled layer all adopt ROGERS RT/duroid5880 double-sided copper-clad medium sheet material, DIELECTRIC CONSTANT ε
r=2.2, material tangent angle loss tan δ=0.0009, dielectric-slab thickness 1.5mm, the dual coating of dielectric-slab has the Copper Foil of thickness 36 μ m.
Above-mentioned foam support layer adopts the Rohacell31HF material, and dielectric constant is ε
r=1.04, tangent angle loss tan δ=0.0017.
Further, paint technology square radiation patch of etching on the Copper Foil in antenna horizontal polarization coplanar wave guide feedback layer front by light, the radiation fin length of side is 0.25 λ～0.27 λ, between radiation fin, spacing is 0.86 λ～0.88 λ, antenna structure be take four chip units as an elementary cell, Unit two, the left side become with Unit two, the right between vertical plane mirror image and self unit to adopt anti-phase feed, between each elementary cell, adopt parallel feed; Etching Mushroom type photon crystal structure between the front array of antenna horizontal polarization coplanar wave guide feedback layer, the square paster that photonic crystal elements is the length of side 0.1 λ, between photonic crystal elements, gap is 0.01 λ, there is the metallization via hole of diameter 0.014 λ at the photonic crystal elements center, and the distance between photon crystal structure edge and radiation patch is 0.2 λ; Depart from radiation patch center 1-2mm lower position on the reverse side Copper Foil of antenna horizontal polarization coplanar wave guide feedback layer and open " hourglass " type coupling slot, make energy be coupled to radiating element from antenna perpendicular polarization aperture-coupled layer.
The dielectric-slab front lighting of above-mentioned antenna perpendicular polarization aperture-coupled layer is painted etching and co-planar waveguide feed layer same position, identical shaped " hourglass " type coupling slot, and dielectric-slab reverse side light is painted etching antenna battle array perpendicular polarization feeding network.
Above-mentioned metallic reflection plate adopts the aluminium sheet of thickness δ=1.5mmm; Be positioned over apart from 0.25 λ place under antenna perpendicular polarization aperture-coupled layer, wherein λ is antenna corresponding air medium wavelength when centre frequency is worked.
The installation step of horizontal polarization coplanar wave guide feedback layer, antenna perpendicular polarization aperture-coupled layer, metallic reflection plate is provided with on above-mentioned microstrip antenna array fixed cavity to fix up an aerial wire.
Compared with prior art, there is following useful technique effect:
(1) patent of the present invention is by eight row microstrip antenna array cell formations; Antenna array element is multi-layer microstrip antenna, parasitic patch, antenna horizontal polarization coplanar wave guide feedback layer, perpendicular polarization aperture-coupled layer are all to be etched on the obverse and reverse of dielectric-slab (light is painted precision ± 0.02mm) by the light technology of painting, and from technique, have guaranteed the realizability of mentality of designing; Simultaneously micro-band forms has overcome the shortcoming of conventional waveguide antenna, have that structure is light and handy, volume is little, lightweight, be easy to transportation, install and set up.
(2) and its antenna axial direction of micro-band dual polarized antenna of prior art hand over ultimate ratio-15dBi～-20dBi between, the polarization interport isolation≤-28dBi, and the Dual-polarized Micro Strip Array that patent of the present invention provides is listed in ° sweep limits of azimuth plane ± 30, axial friendship ultimate ratio≤-37dBi, antenna polarization interport isolation≤-38dBi.
(3) patent of the present invention adopts the new technologies such as left-handed materials coating and photon crystal structure, can effectively reduce the mutual coupling between antenna side lobe, graing lobe and array.
The accompanying drawing explanation
Fig. 1 is X-band wide band high-gain, the low ultimate ratio Dual-polarized Micro Strip Array row whole structure figure that hands over;
Fig. 2 is X-band wide band high-gain, the low ultimate ratio Dual-polarized Micro Strip Array row broken away view of handing over;
Fig. 3 is parasitic patch layer vertical view;
Fig. 4 is antenna horizontal polarization coplanar wave guide feedback layer (containing radiation fin) vertical view;
Fig. 5 is antenna perpendicular polarization aperture-coupled layer vertical view;
Fig. 6 is metallic reflection plate vertical view;
Fig. 7 is antenna standing wave (VSWR) curve;
Fig. 8 is the isolation between antennas curve;
Fig. 9 is the antenna gain directional diagram;
Figure 10 is that antenna cross-polarization compares curve.
Embodiment
Below in conjunction with accompanying drawing, patent of the present invention is described in further detail:
As shown in Figure 1, X-band wide band high-gain of the present invention, the low ultimate ratio Dual-polarized Micro Strip Array row of handing over, form this Dual-polarized Micro Strip Array row 1 by eight row microstrip antenna array elements (the pitching ground roll beam width of array element is 7 °, gain 15dBi).Wherein, as Fig. 2, these Dual-polarized Micro Strip Array row 1 comprise left-handed materials coating 2, inverted parasitic patch layer 3, Rohacell31HF foam support layer 4, containing antenna horizontal polarization coplanar wave guide feedback layer 5, antenna perpendicular polarization aperture-coupled layer 6, microstrip antenna array fixed cavity 7, metallic reflection plate 8 and the radio frequency connector group 9 of radiating element.
Referring to Fig. 2: left-handed materials coating 2, parasitic patch layer 3, Rohacell31HF foam support layer 4, antenna horizontal polarization coplanar wave guide feedback layer 5 is bonded together by conducting resinl and is embedded on the corresponding installation step of microstrip antenna array fixed cavity together with antenna perpendicular polarization aperture-coupled layer 6, metallic reflection plate 8 by nonmetal screw is fixed, the radio frequency connector bond pads is on antenna perpendicular polarization aperture-coupled layer 6, holing in position corresponding with radio frequency connector on metallic reflection plate 8, guarantees that radio frequency connector passes smoothly.
As shown in Fig. 3,4,5: the inverted parasitic patch layer 3 of patent of the present invention, antenna horizontal polarization coplanar wave guide feedback layer (containing radiating element) 5, antenna perpendicular polarization aperture-coupled layer 6 all adopt external imported material ROGERS RT/duroid5880 double-sided copper-clad medium sheet material, DIELECTRIC CONSTANT ε
r=2.2, material tangent angle loss tan δ=0.0009, dielectric-slab thickness 1.5mm, the dual coating of dielectric-slab has the Copper Foil of thickness 36 μ m, and this material medium loss is little, stable performance.
Referring to Fig. 2, above left-handed materials coating 2 can reduce minor level and graing lobe level, strengthens main lobe direction.Using left-handed materials as the antenna cover layer, electromagnetic wave is subject to the scattering process of left-handed materials negative index, wave beam can only perpendicular to antenna direction very among a small circle in propagate, other directions will be restricted, this will improve the directivity of antenna effectively, strengthen main lobe, also can weaken secondary lobe and graing lobe, the thickness of left-handed materials coating 2 is chosen 0.1 λ according to theoretical experience.
Referring to Fig. 3, but the working band of above inverted parasitic patch layer 3 broadening antenna, and the similar radome effect of this parasitic patch layer medium can play protection to antenna.Square patch in parasitic patch layer 3 is painted technique etching on Copper Foil by light and is formed, the paster length of side is 0.3 λ, between single-row paster, spacing is 0.87 λ, distance between row and row paster is 0.76 λ, there is mutual coupling effect in this parasitic patch layer 3 with antenna horizontal polarization coplanar wave guide feedback layer 5, effectively the bandwidth of operation of broadening antenna.
Adopt the Rohacell31HF material as supporting foam, the dielectric constant of this material is ε
r=1.04, tangent angle loss tan δ=0.0017, close with the air performance, less on the electric property impact of antenna, the while can effectively be reduced the overall weight of antenna.
As shown in Figure 4, antenna horizontal polarization coplanar wave guide feedback layer (containing radiation fin) 5, this layer is the main radiating layer of antenna array, the perpendicular polarization of antenna and horizontal polarization are respectively from two quadrature edged feeders of square radiation fin, this layer of Facad structure be take four chip units as an elementary cell, Unit two, the left side become the vertical plane mirror image with Unit two, the right, but all adopt the anti-phase feed of horizontal polarization, perpendicular polarization homophase feed.Adopt parallel feed between each elementary cell, and will convert band and be placed between unit, avoid the bending of conversion band, and make conversion more balanced with feeder line amplitude and the phase place on both sides, thereby make the directional diagram of whole linear array less with the impact of frequency change, also be conducive to cross-polarized inhibition.
Paint technology square radiation patch of etching on the Copper Foil in antenna horizontal polarization coplanar wave guide feedback layer (containing radiating element) 5 fronts by light, the radiation fin length of side is 0.25 λ～0.27 λ, between radiation fin, spacing is 0.86 λ～0.88 λ, antenna structure be take four chip units as an elementary cell, Unit two, the left side become with Unit two, the right between vertical plane mirror image and self unit to adopt anti-phase feed, between each elementary cell, adopt parallel feed; Depart from radiation patch center 1-2mm lower position on the reverse side Copper Foil of antenna horizontal polarization coplanar wave guide feedback layer (containing radiating element) 5 and open " hourglass " type coupling slot, in order to energy is coupled to radiating element from antenna perpendicular polarization aperture-coupled layer 5.
As shown in Figure 4, antenna horizontal polarization co-planar waveguide layer 5, etching Mushroom type photon crystal structure between this layer of array feeder line, microwave section photon crystal structure his-and-hers watches ground roll has the effect of frequency band gap, when the surface wave wavelength is close with the photonic crystal size, surface wave will be fallen in this band gap, thereby reaches inhibitory action.Therefore, in patent of the present invention, utilize photonic crystal to suppress surface wave, and then reduce the mutual coupling between array.In this kind of structure, the square paster that photonic crystal elements is the length of side 0.1 λ, between photonic crystal elements, gap is 0.01 λ, and there is the metallization via hole of diameter 0.014 λ at the photonic crystal elements center, and the distance between photon crystal structure edge and radiation patch is 0.2 λ.
As shown in Figure 5, the dielectric-slab front lighting of antenna perpendicular polarization aperture-coupled layer 6 is painted etching and co-planar waveguide feed layer 5 same positions, identical shaped " hourglass " type coupling slot, and dielectric-slab reverse side light is painted etching antenna battle array perpendicular polarization feeding network.
As shown in Figure 6: metallic reflection plate 8, the aluminium sheet of employing thickness δ=1.5mmm, the surface smoothness of aluminium sheet is good; Be positioned over apart from 0.25 λ under antenna perpendicular polarization aperture-coupled layer 6 (λ is antenna corresponding air medium wavelength when centre frequency is worked) and locate.Holing in position corresponding with the radio frequency connector group on metallic reflection plate 8, guarantees that the radio frequency connector group passes smoothly.
Microstrip antenna array fixed cavity 7 mills out the installation step of antenna horizontal polarization coplanar wave guide feedback layer (containing radiating element) 5, antenna perpendicular polarization aperture-coupled layer 6, metallic reflection plate 8 on this cavity.
As shown in Fig. 7,8,9,10, X-band wide band high-gain of the present invention, the low ultimate ratio Dual-polarized Micro Strip Array row simulation result of handing over show: antenna standing wave VSWR<1.3, the isolation S of two polarization ports of antenna
21<-38dBi, the directional diagram gain G>=25dBi of antenna, the antenna cross-polarization ratio≤-37dBi; This microstrip antenna array is compared with the conventional waveguide antenna simultaneously, transportation and installation that volume is little, lightweight, simple in structure, be conducive to antenna.
Claims (9)
1. an X-band wide band high-gain, the low ultimate ratio Dual-polarized Micro Strip Array of handing over are listed as, it is characterized in that, described Dual-polarized Micro Strip Array row (1) are successively by: left-handed materials coating (2), inverted parasitic patch layer (3), Rohacell31HF foam support layer (4), form containing antenna horizontal polarization coplanar wave guide feedback layer (5), antenna perpendicular polarization aperture-coupled layer (6), microstrip antenna array fixed cavity (7), metallic reflection plate (8) and the radio frequency connector group (9) of radiating element.
2. X-band wide band high-gain according to claim 1, the low ultimate ratio Dual-polarized Micro Strip Array row of handing over, is characterized in that, the pitching ground roll beam width of described every row radiating element is 7 °, gain 15dBi.
3. X-band wide band high-gain according to claim 1, the low ultimate ratio Dual-polarized Micro Strip Array of handing over are listed as, it is characterized in that, described left-handed materials coating (2), parasitic patch layer (3), Rohacell31HF foam support layer (4), antenna horizontal polarization coplanar wave guide feedback layer (5) are bonded together by conducting resinl and to pass through nonmetal screw fixed, and together with antenna perpendicular polarization aperture-coupled layer (6), metallic reflection plate (8), are embedded on the corresponding installation step of microstrip antenna array fixed cavity (7); It is upper that described radio frequency connector group (9) is welded on antenna perpendicular polarization aperture-coupled layer (6), and the position boring that radio frequency connector upper at metallic reflection plate (8) and on radio frequency connector group (9) is corresponding, pass radio frequency connector.
4. X-band wide band high-gain according to claim 1, the low ultimate ratio Dual-polarized Micro Strip Array of handing over are listed as, it is characterized in that, inverted parasitic patch layer (3), antenna horizontal polarization coplanar wave guide feedback layer (5), antenna perpendicular polarization aperture-coupled layer (6) all adopt ROGERS RT/duroid5880 double-sided copper-clad medium sheet material, DIELECTRIC CONSTANT ε
r=2.2, material tangent angle loss tan δ=0.0009, dielectric-slab thickness 1.5mm, the dual coating of described double-sided copper-clad medium sheet material has the Copper Foil of thickness 36 μ m.
5. X-band wide band high-gain according to claim 1, the low ultimate ratio Dual-polarized Micro Strip Array row of handing over, is characterized in that, described foam support layer (4) adopts the Rohacell31HF material, and dielectric constant is ε
r=1.04, tangent angle loss tan δ=0.0017.
6. X-band wide band high-gain according to claim 1, the low ultimate ratio Dual-polarized Micro Strip Array of handing over are listed as, it is characterized in that, paint the square radiation patch of etching on the technology Copper Foil positive at antenna horizontal polarization coplanar wave guide feedback layer (5) by light, the radiation fin length of side is 0.25 λ～0.27 λ, between radiation fin, spacing is 0.86 λ～0.88 λ, antenna structure be take four chip units as an elementary cell, Unit two, the left side become with Unit two, the right between vertical plane mirror image and self unit to adopt anti-phase feed, between each elementary cell, adopt parallel feed; Etching Mushroom type photon crystal structure between the front array of antenna horizontal polarization coplanar wave guide feedback layer (5), the square paster that photonic crystal elements is the length of side 0.1 λ, between photonic crystal elements, gap is 0.01 λ, there is the metallization via hole of diameter 0.14 λ at the photonic crystal elements center, and the distance between photon crystal structure edge and radiation patch is 0.2 λ; Depart from radiation patch center 1-2mm lower position on the reverse side Copper Foil of antenna horizontal polarization coplanar wave guide feedback layer (5) and open " hourglass " type coupling slot, make energy be coupled to radiating element from antenna perpendicular polarization aperture-coupled layer (6).
7. according to the described X-band wide band high-gain of claim 1 or 6, the low ultimate ratio Dual-polarized Micro Strip Array row of handing over, it is characterized in that, the dielectric-slab front lighting of described antenna perpendicular polarization aperture-coupled layer (6) is painted etching and co-planar waveguide feed layer (5) same position, identical shaped " hourglass " type coupling slot, and dielectric-slab reverse side light is painted etching antenna battle array perpendicular polarization feeding network.
8. X-band wide band high-gain according to claim 1, the low ultimate ratio Dual-polarized Micro Strip Array row of handing over, is characterized in that, described metallic reflection plate (8) adopts the aluminium sheet that thickness δ is 1.5mmm; Be positioned over apart from 0.25 λ place under antenna perpendicular polarization aperture-coupled layer (6), wherein λ is antenna corresponding air medium wavelength when centre frequency is worked.
9. X-band wide band high-gain according to claim 1, the low ultimate ratio Dual-polarized Micro Strip Array of handing over are listed as, it is characterized in that the installation step of be provided with on described microstrip antenna array fixed cavity (7) to fix up an aerial wire horizontal polarization coplanar wave guide feedback layer (5), antenna perpendicular polarization aperture-coupled layer (6), metallic reflection plate (8).
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| CN104577354A (en) * | 2015-01-30 | 2015-04-29 | 佛山澳信科技有限公司 | Antenna special for track |
| CN106099342A (en) * | 2016-07-04 | 2016-11-09 | 西安电子科技大学 | A kind of Meta Materials coating double frequency phased-array antenna |
| CN107196067A (en) * | 2017-06-14 | 2017-09-22 | 复旦大学 | Near-field coupling polarizer realizes that circular polarisation carries on the back cavity waveguide slot array antenna |
| CN107882492A (en) * | 2017-12-11 | 2018-04-06 | 重庆工业职业技术学院 | Millimeter wave antenna windowpane |
| CN107978840A (en) * | 2017-12-25 | 2018-05-01 | 合肥若森智能科技有限公司 | A kind of dual-linear polarization antenna feed array component |
| CN108417971A (en) * | 2018-03-26 | 2018-08-17 | 珠海纳睿达科技有限公司 | Dual-polarized antenna array and dual polarization phased array antenna |
| CN108461929A (en) * | 2018-03-28 | 2018-08-28 | 珠海纳睿达科技有限公司 | Dual-polarized antenna array and dual polarization phased array antenna |
| CN110797649A (en) * | 2019-11-11 | 2020-02-14 | 中国电子科技集团公司第十四研究所 | Broadband dual-polarization microstrip antenna sub-array with filtering and scaling functions |
| CN111029791A (en) * | 2019-12-20 | 2020-04-17 | 中国电波传播研究所（中国电子科技集团公司第二十二研究所） | Tightly coupled dipole reflection antenna array |
| CN111180868A (en) * | 2019-12-30 | 2020-05-19 | 中国电子科技集团公司第十四研究所 | Satellite-borne SAR dual-polarization microstrip radiation subarray antenna |
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| CN104577354A (en) * | 2015-01-30 | 2015-04-29 | 佛山澳信科技有限公司 | Antenna special for track |
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| CN108461929A (en) * | 2018-03-28 | 2018-08-28 | 珠海纳睿达科技有限公司 | Dual-polarized antenna array and dual polarization phased array antenna |
| CN108461929B (en) * | 2018-03-28 | 2024-03-15 | 广东纳睿雷达科技股份有限公司 | Dual polarized antenna array and dual polarized phased array antenna |
| CN110797649A (en) * | 2019-11-11 | 2020-02-14 | 中国电子科技集团公司第十四研究所 | Broadband dual-polarization microstrip antenna sub-array with filtering and scaling functions |
| CN111029791A (en) * | 2019-12-20 | 2020-04-17 | 中国电波传播研究所（中国电子科技集团公司第二十二研究所） | Tightly coupled dipole reflection antenna array |
| CN111180868B (en) * | 2019-12-30 | 2022-07-15 | 中国电子科技集团公司第十四研究所 | Satellite-borne SAR dual-polarization microstrip radiation subarray antenna |
| CN111180868A (en) * | 2019-12-30 | 2020-05-19 | 中国电子科技集团公司第十四研究所 | Satellite-borne SAR dual-polarization microstrip radiation subarray antenna |
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