CN102629707A - Antenna housing for reducing minor lobe level by using artificial structure material - Google Patents
Antenna housing for reducing minor lobe level by using artificial structure material Download PDFInfo
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- CN102629707A CN102629707A CN2012101050920A CN201210105092A CN102629707A CN 102629707 A CN102629707 A CN 102629707A CN 2012101050920 A CN2012101050920 A CN 2012101050920A CN 201210105092 A CN201210105092 A CN 201210105092A CN 102629707 A CN102629707 A CN 102629707A
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- radome
- minor level
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Abstract
The invention discloses an antenna housing for reducing minor lobe level by using an artificial structure material. 2ni columns and mj rows of annular slot unit structures are printed on a single-face copper-clad microwave dielectric plate in the transverse direction and the longitudinal direction respectively, wherein the transversely arranged annular slot unit structures have similar structure appearances and different sizes and are symmetrically distributed along the transverse central axis of the antenna housing; the longitudinally arranged annular slot unit structures are completely the same; and chip resistors are transversely, symmetrically and additionally arranged in each annular slot structure. By rationally selecting the resistance size of the resistors and designing the size of unit structures of the artificial structure material, electromagnetic wave has different transmittance rates and the same transmission phase through each columns of structures, so that the aim of reducing the minor lobe level of the antenna is fulfilled; and the structure has the advantages of simple design, light weight and low cost.
Description
Technical field
The present invention relates to a kind of radome, particularly a kind of radome that utilizes artificial structure's material to reduce minor level.
Background technology
The minor level level is to weigh the important indicator of array antenna performance.Lower minor level can effectively reduce the phase mutual interference of array antenna radiated electromagnetic wave, improves signal capture efficient, improves signal to noise ratio.Therefore, how to realize that lower minor level is the problem that the researcher is concerned about always.Common Low Sidelobe level array antenna method for designing mainly contains two kinds: optimize the power of radiation source proportioning and improve the antenna unit structure profile.Through the optimization to the power of radiation source proportioning such as simulated annealing, genetic algorithm, weighting algorithm, can effectively control minor level.Also can reduce the antenna side lobe level through improving the aerial array profile simultaneously, like trumpet type, pyramid, notch cuttype etc.
Optimizing the power of radiation source proportioning is through design optimization feed radiant power, has certain oscillator intensity when making the electromagnetic wave outgoing and distributes, thereby reach the purpose that reduces the array antenna minor level.This control methods require the power of a plurality of radiation sources is carried out conscientious calculation optimization, and accurately control, and the antenna rear end is required than higher.A kind of in addition method of reduction antenna side lobe level commonly used--improve the antenna unit structure profile, this method can change the profile of antenna usually, and the antenna volume change causes integrated difficulty greatly can to make its difficulty of processing increase cause cost to improve perhaps.
Occurred a kind of novel artificial structure's material in recent years,, can effectively control irradiation of electromagnetic waves through the construction unit of designing material.At present, the application study of artificial structure's material aspect antenna mainly concentrates on the radiance that improves antenna how effectively, as improving gain, widen bandwidth of operation, realizing polarization conversion and wave beam deflection etc.And utilize artificial structure's material also not appear in the newspapers as the research that radome reduces the antenna side lobe aspect.
Summary of the invention
Technical solution of the present invention: the deficiency that overcomes prior art; Provide a kind of artificial structure's of utilization material to reduce the radome of minor level; In through the radome different lines, have different transmitance amplitudes and identical radiance phase place with the electromagnetic wave that optimization Chip-R resistance makes antenna (battle array) give off through designing material cellular construction size; When the transmitance amplitude satisfies when necessarily arranging, can effectively reduce the minor level of antenna (battle array).
The technical solution adopted for the present invention to solve the technical problems is: a kind of radome that utilizes artificial structure's material to reduce minor level; It is characterized in that: cover at single face on the microwave-medium plate 1 of copper; With length p is cycle (λ/4＜p＜2 * λ/3), and λ is an operation wavelength, prints 2n respectively
iRow * m
j Row annulus structure 2, wherein the n representative is listed as, and m represents row, and i represents columns, and j represents line number; 2n
i Row annulus structure 2 is laterally arranged, and every row have similar structure and shape and different size dimensions, and along radome transverse center axial symmetry, m
j Row annulus structure 2 is vertically arranged, and structure and shape and size dimension are identical; In the slit 3 of each annulus structure, add Chip-R R, so far constitute artificial structure's material that can reduce minor level along lateral symmetry.Through selecting Chip-R R resistance size also to design the size of the annulus structure of laterally arranging, make electromagnetic wave have different transmitances and identical transmission phase through every row annulus structure.Place the aerial array top just can realize reducing the purpose of antenna side lobe level as radome this artificial structure's material.
Said 2n
i Row annulus structure 2 and m
jThe i of row annulus structure 2 and the quantity of j are confirmed by the radiating antenna bore that artificial structure's material radome covers, and make artificial structure's material size can cover entire antenna.Caliber size like antenna is La * Wa, then requires 2 * i * p＞La, j * p＞Wa.
Said 2n
i Row annulus structure 2 sizes are confirmed by required minor level size, according to the minor level value, adopt Taylor's distribution or Chebyshev's Distribution calculation to go out n
1To n
iThe amplitude ratio of row annulus structure outgoing electromagnetic wave transmitance, the counter then size of releasing respective column annulus structure.
The size of said Chip-R R resistance is confirmed by required minor level horizontal size, according to the minor level value, adopts Taylor's distribution or Chebyshev's Distribution calculation to go out n
1To n
iThe amplitude ratio of the outgoing electromagnetic wave transmitance of row annulus structure, the counter then value of releasing Chip-R R in the structure of respective column annulus, the resistance R span is 1～1000 Ω usually.
The present invention's beneficial effect compared with prior art is:
(1) the present invention is the radome that can effectively reduce minor level; Need not antenna (battle array) profile is done special optimization; Also need not antenna array unit is made loaded down with trivial details unequal power proportion design; Only need to realize through the construction unit of appropriate design material the certain distributed of incident electromagnetism transmitance amplitude, just control antenna (battle array) minor level is big or small effectively.
(2) the present invention also has modern design, and is simple in structure, in light weight, the advantage that cost is low.Structure of the present invention adopts the mode of single face welding Chip-R, and manufacturing process is simple, compares with the method for traditional reduction antenna (battle array) minor level, has the simple novelty of method for designing, volume is little, in light weight, cost is low characteristics.
Description of drawings
Fig. 1 is an annulus of the present invention structural representation;
Fig. 2 is this radome overall structure sketch map;
Fig. 3 is an electromagnetic wave transmitance distribution of amplitudes modulation sketch map;
Fig. 4 is a structural representation of the present invention;
Fig. 5 is annulus construction unit transmissivity and transmission phase curve;
Fig. 6 loads and the far-field radiation directional diagram contrast that does not load artificial structure's material radome for antenna.
Among the figure: 1 represents the microwave-medium plate, 2 representative annulus structures, 3 representative slits.
Embodiment
As shown in Figure 1, in order to make the radome that this artificial structure's of utilization material reduces minor level, adopt the single face that is printed with the annulus to cover copper microwave-medium plate, and adding two Chip-R R along the horizontal direction symmetry.In the xyz coordinate system, k be the incident wave direction along the z axle, E be direction of an electric field along the x axle, H is that magnetic direction is along the y axle.Wherein P representes the unit cycle, and r representes the outer shroud radius, and w representes annular gap width, and t representes the thickness of dielectric-slab, and R representes Chip-R.
Fig. 2 is the radome overall structure sketch map of invention design.Cover at single face on the microwave-medium plate 1 of copper, print 2n respectively
iRow * m
j Row annulus structure 2, wherein 2n
iRow annulus structure is laterally arranged, and every row have similar structure and shape and different size dimensions, and along radome transverse center axial symmetry, m
jRow annulus structure is vertically arranged, and structure and shape and size dimension are identical, in the slit 3 of each annulus structure, add Chip-R R along lateral symmetry.Described 2n
iRow annulus structure and m
jThe i of row annulus structure 2 and the size of j are confirmed by the radiating antenna bore that artificial structure's material radome covers, and make artificial structure's material size can cover entire antenna.
Fig. 3 has provided plane wave through electromagnetic wave transmitance Modulation and Amplitude Modulation behind the artificial structure material.The collimated beam of sound of antenna (battle array) radiation has identical amplitude A
0With identical phase place, through horizontal 2n
iAfter the modulation of row artificial structure material, it is identical but amplitude different whenever to list the electromagnetic wave phase place of penetrating, and is respectively A
1, A
2... A
nWork as A
1: A
2: ... .A
nRatio when satisfying certain condition, the electromagnetic wave of outgoing has the Low Sidelobe level.
In the practical implementation process; Radiating antenna is made up of slot array antenna; Its caliber size is 105mm * 105mm; Operating frequency is set at 10.3GHz (λ ≈ 29.12mm), with minor level be reduced to-26dB is a target, the transmitance amplitude is by the distribution of Taylor's function and have identical transmitance phase place when requiring electromagnetic wave through every row artificial structure material.According to the antenna aperture size, adopt 8 * unit 8 annulus structure here, i.e. 2n
iI=4 in the row, m
jJ=8 in the row.Period p=the 15mm of annulus structure, the entire antenna cover by artificial structure's material structure is of a size of 120mm * 120mm at last.The selective sampling number is Taylor's distribution of 4, i.e. minor level R
0=-26dB waits the minor level parameter
Through calculating electromagnetic wave transmitance amplitude ratio be: 1: 0.8401: 0.5779: 0.3745 (from the center to the edge) because the left-right symmetric relation has been just listed out half the here.
In the practical implementation process; As shown in Figure 4; These 8 row * 8 row annulus structural printings cover the covering on the copper face of microwave-medium plate 1 (adopting Arlon AR 320) of copper at single face, wherein 8 row annulus structures are along radome transverse center axial symmetry, and every row have similar structure and shape and different size dimensions; 8 row annulus structures 2 are vertically arranged, and physical dimension is identical; 3 places, slit in each annulus structure 2 add Chip-R R along lateral symmetry; Through selecting Chip-R R resistance size and designing the physical dimension of each transverse annular gap structure 2; Make electromagnetic wave have different transmitances and identical transmission phase, thereby realize reducing the purpose of antenna side lobe level through every row annulus structure 2.According to the transmitance amplitude ratio that calculates, at first design has the physical dimension of maximum transmission amplitude.The Chip-R symmetry that is 3 Ω with the most common resistance size is added in the cellular construction, and is wide through optimizing outer shroud radius r and w seam, obtains maximum transmission A
1, it is decided to be row n
1Transmitance amplitude that record obtains at this moment and corresponding transmitance phase place.In the optimizing process afterwards with A
1Be the normalization denominator, regulate r, the value of w and R, the transmitance amplitude ratio when making electromagnetic wave through every row annulus structure satisfies the aforementioned proportion condition, and it is basicly stable constant to satisfy the transmitance phase place simultaneously.Set r
iThe outer shroud radius of representing the i row, w
iThe annulus width of representing the i row, R
iRepresent the resistance size of the Chip-R that add i row annulus, utilize Electromagnetic Simulation software CST or HFSS to optimize the value that can obtain every row annulus construction unit: r
1=r
2=7mm, r
3=6.65mm, r
4=4.2mm, w
1=2.2mm, w
2=2.3mm, w
3=2.2mm, w
4=1mm, R
1=3 Ω, R
2=22.5 Ω, R
3=75 Ω, R
4=315 Ω.Fig. 5 has enumerated n
1Corresponding transmitance and the phase curve in row artificial structure unit.At r
1=7mm, w
1=2.2mm, R
1Under=3 Ω conditions, obtain the maximum transmission amplitude A at 10.3GHz
1=0.954 with corresponding transmitance phase place.
Fig. 6 is antenna and loads and do not load the radiation far-field pattern that artificial structure's material radome obtains, and as can be seen from Figure 6, behind the loaded antenna cover, the antenna side lobe level is reduced to-24.6dB from-13.4dB, near Design Theory value-26dB.Verified that thus radome proposed by the invention can well realize reducing the purpose of antenna side lobe level.
The present invention does not set forth part in detail and belongs to techniques well known.
Obviously, for the person of ordinary skill of the art, also possibly make other execution mode with reference to embodiment mentioned above.Embodiment in the preceding text is exemplary rather than circumscribed.All modifications within the essence of claim technical scheme of the present invention all belong to its scope required for protection.
Claims (4)
1. radome that utilizes artificial structure's material to reduce minor level, it is characterized in that: covering at single face on the microwave-medium plate (1) of copper, is the cycle to print 2n respectively with length p
iRow * m
jRow annulus structure (2), λ 4＜p＜2 * λ 3 wherein, λ is an operation wavelength, n representative row wherein, m represent capable, and i represents columns, and j represents line number; Said 2n
iRow annulus structures (2) are laterally arranged, and every row have similar structure and shape and different size dimensions, and along radome transverse center axial symmetry, said m
jRow annulus structure (2) is vertically arranged, and structure and shape and size dimension are identical; In the slit (3) of each annulus structure (2), add Chip-R R, so far constitute artificial structure's material that can reduce minor level along lateral symmetry; Through selecting Chip-R R resistance size also to design the size of the annulus structure (2) of laterally arranging, make electromagnetic wave have different transmitances and identical transmission phase through every row annulus structure (2); Place the aerial array top just can realize reducing the purpose of antenna side lobe level as radome this artificial structure's material.
2. a kind of radome that utilizes artificial structure's material to reduce minor level according to claim 1 is characterized in that: said 2n
iRow annulus structure (2) and m
jThe i of row annulus structure (2) and the quantity of j are confirmed by the antenna aperture that artificial structure's material radome covers, and make artificial structure's material size can cover entire antenna.
3. a kind of radome that utilizes artificial structure's material to reduce minor level according to claim 1 is characterized in that: said 2n
iRow annulus structure (2) size is confirmed by required minor level size, according to the minor level value, adopts Taylor's distribution or Chebyshev's Distribution calculation to go out n
1To n
iThe amplitude ratio of row gap structure (2) outgoing electromagnetic wave transmitance, the counter then size of releasing respective column annulus structure (2).
4. a kind of radome that utilizes artificial structure's material to reduce minor level according to claim 1; It is characterized in that: the size of said Chip-R R resistance is confirmed by required minor level horizontal size; According to the minor level value, adopt Taylor's distribution or Chebyshev's Distribution calculation to go out n
1To n
iThe amplitude ratio of row annulus structure outgoing electromagnetic wave transmitance, the counter then value of releasing Chip-R R in the structure of respective column annulus, the span of Chip-R value R is 1～1000 Ω.
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|---|---|---|---|
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| CN201210105092.0A CN102629707B (en) | 2012-04-12 | 2012-04-12 | Antenna housing for reducing minor lobe level by using artificial structure material |
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| CN102629707A true CN102629707A (en) | 2012-08-08 |
| CN102629707B CN102629707B (en) | 2014-03-26 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102882001A (en) * | 2012-09-25 | 2013-01-16 | 中国科学院光电技术研究所 | Antenna housing for implementing antenna beamwidth switching by using artificial structure material |
| CN105514619A (en) * | 2016-01-13 | 2016-04-20 | 武汉科技大学 | Ultra wideband material microwave absorber loaded with chip resistor |
| WO2019165684A1 (en) * | 2018-03-02 | 2019-09-06 | 常熟市浙大紫金光电技术研究中心 | Radome for expanding deflection angle of phase array antenna |
| CN114122743A (en) * | 2021-11-25 | 2022-03-01 | 华中科技大学 | Wave absorbing/transmitting device with miniaturized units |
| WO2023225879A1 (en) * | 2022-05-24 | 2023-11-30 | 华为技术有限公司 | Metasurface coating, radome assembly and array antenna |
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| US20040140945A1 (en) * | 2003-01-14 | 2004-07-22 | Werner Douglas H. | Synthesis of metamaterial ferrites for RF applications using electromagnetic bandgap structures |
| CN101335379A (en) * | 2007-06-25 | 2008-12-31 | 财团法人工业技术研究院 | Antenna apparatus and antenna radome and design method thereof |
| CN101425621A (en) * | 2007-10-31 | 2009-05-06 | 财团法人工业技术研究院 | Antenna structure and antenna radome thereof |
| CN101501927A (en) * | 2006-04-27 | 2009-08-05 | 雷斯潘公司 | Antennas, devices and systems based on metamaterial structures |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040140945A1 (en) * | 2003-01-14 | 2004-07-22 | Werner Douglas H. | Synthesis of metamaterial ferrites for RF applications using electromagnetic bandgap structures |
| CN101501927A (en) * | 2006-04-27 | 2009-08-05 | 雷斯潘公司 | Antennas, devices and systems based on metamaterial structures |
| CN101335379A (en) * | 2007-06-25 | 2008-12-31 | 财团法人工业技术研究院 | Antenna apparatus and antenna radome and design method thereof |
| CN101425621A (en) * | 2007-10-31 | 2009-05-06 | 财团法人工业技术研究院 | Antenna structure and antenna radome thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102882001A (en) * | 2012-09-25 | 2013-01-16 | 中国科学院光电技术研究所 | Antenna housing for implementing antenna beamwidth switching by using artificial structure material |
| CN105514619A (en) * | 2016-01-13 | 2016-04-20 | 武汉科技大学 | Ultra wideband material microwave absorber loaded with chip resistor |
| WO2019165684A1 (en) * | 2018-03-02 | 2019-09-06 | 常熟市浙大紫金光电技术研究中心 | Radome for expanding deflection angle of phase array antenna |
| CN114122743A (en) * | 2021-11-25 | 2022-03-01 | 华中科技大学 | Wave absorbing/transmitting device with miniaturized units |
| CN114122743B (en) * | 2021-11-25 | 2023-01-06 | 华中科技大学 | Wave absorbing/transmitting device with miniaturized units |
| WO2023225879A1 (en) * | 2022-05-24 | 2023-11-30 | 华为技术有限公司 | Metasurface coating, radome assembly and array antenna |
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|---|---|
| CN102629707B (en) | 2014-03-26 |
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