CN205303689U - Absorbent structure and aircraft covering - Google Patents
Absorbent structure and aircraft covering Download PDFInfo
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- CN205303689U CN205303689U CN201620050108.6U CN201620050108U CN205303689U CN 205303689 U CN205303689 U CN 205303689U CN 201620050108 U CN201620050108 U CN 201620050108U CN 205303689 U CN205303689 U CN 205303689U
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Abstract
The utility model discloses an absorbent structure and aircraft covering. Absorbent structure includes: at least one laminated structure, laminated structure include the base plate with be located the resistance layer on the base plate, wherein, the resistance layer is maltese cross frame structure in arrange a plurality of that align each other. This absorbent structure can be as the electromagnetic absorbing material of specific frequency channel to show the polarization selection nature of TE ripples and TM ripples.
Description
Technical field
The utility model relates to electromagnetic wave absorbent material, relates more specifically to absorbent structure.
Background technology
Electromagnetic wave absorbent material (i.e. absorbing material) can absorb incident hertzian wave, thus reduces reflection and the radiation of hertzian wave. Absorbing material can reduce the electromagnetic wave leakage of electronic system, such that it is able to for the interference reduced between electronic system, improve electromagnetic compatibility.
In addition, if using the covering of absorbing material as aircraft, then the Radar Cross Section (RCS, i.e. RadarCrossSection) of aircraft can be reduced. Such as, the wing of aircraft is the important source of body RCS. Adopt the RCS that can significantly reduce body that absorbing material covers, thus reduce the radar detectability of aircraft, it is achieved stealth effect.
According to different purposes, absorbing material not only requires good absorbing property, and other performances such as weight, thickness and bandwidth are also had requirement. Single absorbing material is difficult to meet the composite request of bandwidth sum physical strength aspect. Absorbent structure is the important means obtaining lightweight broad-band band absorbing material.
But, along with technical development, the performance requriements of absorbing material is more and more higher. Expect that the absorbent structure of exploitation further has the absorbing property of improvement and TE ripple and TM wave table are revealed Polarization selection.
Practical novel content
In view of the above problems, problem to be solved in the utility model is to provide the wave filter that a kind of design by resistive layer improves absorbing property.
According to one side of the present utility model, it is provided that a kind of absorbent structure, it is characterised in that, comprise: at least one rhythmo structure, the resistive layer that described rhythmo structure comprises substrate and is positioned on substrate, wherein, described resistive layer comprises the multiple middle maltese cross frame structure of the arrangement that is in alignment with each other.
Preferably, the many row arrangements of described multiple middle maltese cross frame structure.
Preferably, described multiple middle maltese cross frame structure is arranged in array.
Preferably, described array comprises multiple structural unit, and each structural unit is provided with a described middle maltese cross frame structure.
Preferably, described middle maltese cross frame structure is placed in the middle in described structural unit.
Preferably, described middle maltese cross frame structure is enclosed with the 2nd frame shape structure by the first frame shape structure and closes, the first party of described multiple structural unit is to the length direction for described first frame shape structure, second direction is the length direction of described 2nd frame shape structure, in the first direction and a second direction, the cross frame structure of structural unit described in adjacent two is spaced apart.
Preferably, the length direction of described first frame shape structure is perpendiculared to one another with the length direction of described 2nd frame shape structure, and the length of described first frame shape structure is greater than the length of described 2nd frame shape structure.
Preferably, the width of described first frame shape structure is less than the width of described 2nd frame shape structure.
Preferably, described first frame shape structure is identical with the live width of described 2nd frame shape structure.
Preferably, described resistive layer is clipped between two substrates.
Preferably, described absorbent structure comprises multiple rhythmo structure, and the structural unit shape of the resistive layer in described multiple rhythmo structure is identical but resistivity different.
Preferably, described absorbent structure comprises multiple rhythmo structure, and the structural unit size of the resistive layer in described multiple rhythmo structure is different to obtain different resistivity.
The utility model also provides a kind of aircraft skin, comprises above-mentioned absorbent structure.
The utility model, by designing resistive layer on substrate, changes microwave absorbing property by the electromagnetic response feature of associated lamination structure, such that it is able to improve the absorbing property of absorbent structure. TE ripple and TM wave table are revealed different absorptive character by this absorbent structure, absorb TM ripple in a large number when low frequency and weak absorbing TM ripple during high frequency, and though simultaneously high frequency or low frequency time equal weak absorbing TE ripple, thus obtain Polarization selection.
Accompanying drawing explanation
By referring to accompanying drawing to the description of the utility model embodiment, above-mentioned and other objects, features and advantages of the present utility model will be more clear, in the accompanying drawings:
Fig. 1 illustrates the perspective view of the absorbent structure of example in contrast;
Fig. 2 illustrates the perspective view of the absorbent structure according to the utility model embodiment;
Fig. 3 illustrates the vertical view of the structural unit adopted in the absorbent structure according to the utility model embodiment;
Fig. 4 illustrates the sectional view of the absorbent structure according to the utility model embodiment;
Fig. 5 illustrates the simulated properties curve of the S11 parameter of the absorbent structure according to reference examples;
Fig. 6 illustrates the simulated properties curve of the S11 parameter of the absorbent structure according to the utility model embodiment.
Embodiment
Hereinafter with reference to accompanying drawing, the utility model is described more in detail. In various figures, identical element adopts similar Reference numeral to represent. For the sake of clarity, each part in accompanying drawing is not drawn in proportion. Furthermore, it may be possible to do not illustrate some known part.
It is to be understood that, when describing certain structure, when one layer, one region is called be positioned at another layer, another region " above " or when " top ", can refer to be located immediately at another layer, another over, or itself and another layer, also comprise other layer or region between another region. Further, if this structure overturn, this layer, one region will be positioned at another layer, another region " below " or " lower section ". If the situation being located immediately at another layer, another over to describe, " A is directly on B " or the form of presentation of " A is on B and adjoins with it " will be adopted herein.
The utility model can present in a variety of manners, below will describe some of them example.
Fig. 1 illustrates the perspective view of the absorbent structure of example in contrast. Absorbent structure 100 comprises stacking multiple layers. First resistive layer 115 is positioned on first substrate 112, forms the first rhythmo structure. 2nd resistive layer 125 is positioned on second substrate 122, forms the 2nd rhythmo structure. In addition, the 3rd substrate 116 covers the first resistive layer 115.
The array that first resistive layer 115 and the 2nd resistive layer 125 are made up of multiple structural unit respectively. Each structural unit is the rotational symmetry distribution patterns being made up of bus, the first symmetry axis and the 2nd symmetry axis be parallel to respectively first party perpendicular to one another to and second direction.Such as, this rotational symmetry distribution patterns comprises the first lines that snake type extends and the 2nd lines, the first lines and the 2nd lines form rotational symmetry pattern relative to the 2nd symmetry axis separately, and toward each other in the first symmetry axis formation rotational symmetry pattern. First lines and the 2nd lines comprise respectively along first party to the end exposed. The end of adjacent structural unit is connected to each other.
Fig. 2 illustrates the perspective view of the absorbent structure according to the utility model embodiment, and Fig. 4 illustrates the sectional view of the absorbent structure according to the utility model embodiment. This absorbent structure 200 comprises stacking multiple rhythmo structure, the resistive layer that rhythmo structure comprises substrate and is positioned on substrate. First resistive layer 215 is positioned on first substrate 112, forms the first rhythmo structure. 2nd resistive layer 225 is positioned on second substrate 122, forms the 2nd rhythmo structure. In addition, the 3rd substrate 116 covers the first resistive layer 215.
In order to illustrate the first resistive layer 215 and the 2nd resistive layer 225, the 3rd substrate 116 separation being illustrated, the arrow instruction in figure is separated the travel direction of relevant layers from absorbent structure.
The array that first resistive layer 215 and the 2nd resistive layer 225 are made up of multiple structural unit 2150 respectively. Fig. 3 illustrates the vertical view of the structural unit adopted in the absorbent structure according to the utility model embodiment.
Each structural unit 2150 comprises the middle maltese cross frame structure 2151 formed by bus. Described middle maltese cross frame structure 2151 is enclosed with the 2nd frame shape structure by the first frame shape structure perpendicular to one another and closes. The first party of described structural unit is to the bearing of trend that X is described first frame shape structure, and second direction Y is the bearing of trend of described 2nd frame shape structure. The multiple middle maltese cross frame structure 2151 of different units is in alignment with each other arrangement. Further, the multiple middle maltese cross frame structure 2151 of adjacent structural unit is spaced apart on X and second direction Y in first party.
In examples as shown in figure 3, the length of described first frame shape structure is greater than described 2nd frame shape structure, and the width of the first frame shape structure is less than described 2nd frame shape structure. Bus extends along described first party to X and described second direction Y, and the live width of each several part is equal. But, this size relationship is not necessary, it is possible to suitably revise according to emulation result.
The lengths table of this structural unit 2150 is illustrated as L1, and width means is W1. The lengths table of the first frame shape structure in middle maltese cross frame structure 2151 is illustrated as L2, and width means is W2, and the lengths table of the 2nd frame shape structure is illustrated as L3, and width means is W3. The live width of bus represents for w1.
In the first resistive layer 215 and the 2nd resistive layer 225, multiple structural unit 2150 is arranged in array. On the length direction and width (namely first party is to X and second direction Y) of structural unit, the middle maltese cross frame structure 2151 of two adjacent structural units is spaced apart.
First resistive layer 215 and the 2nd resistive layer 225 can be made up of arbitrary electro-conductive material. Here electro-conductive material, it can be the metallic substance that the conductivity such as gold and silver, copper is good, or main component is one or both the alloy material in gold and silver, copper, it is also possible to be the non-metallic material that carbon nanotube, Al-Doped ZnO, indium tin oxide etc. can conduct electricity. In the utility model, the material preferably copper of the first resistive layer 215 and the 2nd resistive layer 225 or silver.First resistive layer 215 and the 2nd resistive layer 225 can be arbitrary substance forms. Here physical form, it is possible to be the one being selected from solid, liquid, stream-like body and meal, as long as it can maintain specific shape. The electro-conductive material of such as liquid can be contained among cavity, pipeline, capsule and limit its shape.
First substrate 112, second substrate 122, the 3rd substrate 116 can be respectively medium substrate. The material of medium substrate has multiple choices, such as pottery, FR4, F4B (tetrafluoroethylene), HDPE (high density polyethylene(HDPE), HighDensityPolyethylene), ABS (AcrylonitrileButadieneStyrene) etc. Such as, the relative permittivity of medium substrate be greater than 2, loss tangent be less than 0.1. First resistive layer 215 and the 2nd resistive layer 225 can the mode such as, hot pressing deposited, bonding by printing, plating be attached on medium substrate.
First resistive layer 215 and the 2nd resistive layer 225 have different resistivity respectively. In an example, the first resistive layer 215 comprises same configuration and the identical structural unit of size respectively with the 2nd resistive layer 225, but due to the electro-conductive material adopted different, it is possible to obtain different resistivity. When the structural unit adopting electrically conductive ink to form the first resistive layer 215 and the 2nd resistive layer 225, it is possible to obtain different resistivity by changing the resistivity of electrically conductive ink. In another example, the first resistive layer 215 comprises same configuration respectively with the 2nd resistive layer 225 but the different structural unit of size, even if the electro-conductive material adopted is identical, it is also possible to obtain different resistivity.
In an example, the first resistive layer 215 and the 2nd resistive layer 225 are the patterned metal layers on medium substrate. First resistive layer 215 and the 2nd resistive layer 225 by etching, plating, bore quarters, photoetching, electronics quarter or ion quarter etc. multiple method be attached on medium substrate. Wherein, etching is preferably manufacturing process, its step is after the plane pattern designing suitable man-made microstructure, first it is attached on medium substrate by overall for metal paillon foil, then etching machines is passed through, utilizing the chemical reaction of solvent and metal to get rid of the paillon foil part beyond man-made microstructure predetermined pattern, remaining can obtain man-made microstructure. In another example, the first resistive layer 215 and the 2nd resistive layer 225 can be formed on medium substrate by electrically conductive ink printing.
Fig. 4 illustrates the sectional view of the absorbent structure according to the utility model embodiment. Absorbent structure 200 according to this embodiment is identical with the structure shown in Fig. 2. First resistive layer 215 is positioned on first substrate 112, forms the first rhythmo structure. 2nd resistive layer 225 is positioned on second substrate 122, forms the 2nd rhythmo structure. In addition, the 3rd substrate 116 covers the first resistive layer 215.
Fig. 5 illustrates the simulated properties curve of the S11 parameter of the absorbent structure according to reference examples. Structural unit in this absorbent structure as shown in Figure 1, comprises the first and second rhythmo structure.
As can be seen from Figure 5, TM ripple is absorbed at 2.39 to 9.30GHz and 15.44 to 21.60GHz wave band; And TE ripple is when below 25.4GHz wave band, S11 value is all higher than-2.25dB. That is, TM ripple all can be inhaled ripple and TE ripple is not affected when low frequency and high frequency. The microwave absorbing property of this absorbent structure 100 is TM wavelength-division two sections absorption and TE ripple is not inhaled ripple.
Fig. 6 illustrates the simulated properties curve of the S11 parameter of the absorbent structure according to the utility model embodiment.
As shown in Figure 3, its structure as shown in Figure 4, comprises the first and second rhythmo structure to structural unit in this absorbent structure.
In simulations, it is assumed that the first resistive layer 215 is identical with the structure of the structural unit of the 2nd resistive layer 225. Different materials is adopted to form the first resistive layer 215 and the 2nd resistive layer 225 so that the resistivity of the first resistive layer 215 is 8 ��/Sq, and the resistivity of the 2nd resistive layer 225 is 4000 ��/Sq.
In the first resistive layer 215 and the 2nd resistive layer 225, the length L1 of each structural unit 2150 and width W 1 are respectively 15 millimeters and 9 millimeters, and thickness is 0.02 millimeter. The length L2 of the first frame shape structure in middle maltese cross frame structure 2151 is 13.5 millimeters, and width W 2 is 1.1 millimeters, and the length L3 of the 2nd frame shape structure is 5 millimeters, and width W 3 is 2.1 millimeters. The live width w1 of bus is 0.3 millimeter.
The material of first substrate 112, second substrate 122, the 3rd substrate 116 is identical, is FR4 substrate, relative permittivity 3.0, and the thickness of the 3rd substrate 116 is 0.4 millimeter, and remaining substrate thickness is 6.8 millimeters.
In addition, in order to test reflection of electromagnetic wave characteristic, the surperficial thickness setting relative with the 2nd resistive layer 225 at second substrate 122 is the layers of copper of 0.018 millimeter.
The result carrying out emulating for the absorbent structure of above-mentioned parameter shows, the hertzian wave of special frequency channel is shown microwave absorbing property by this absorbent structure. Figure 6 illustrates the S11 simulation curve of TE ripple and TM ripple, in simulations, the incident angle of TE ripple and TM ripple is zero, and namely front is incident. It can be seen that the S11 of TE ripple at below 20GHz wave band higher than the S11 of-2.84dB, TM ripple at 3.21-10.01GHz wave band lower than the S11 of-8.26dB, TM ripple at below 2.35GHz and more than 10.75GHz wave band all higher than-2.84dB. It thus is seen that this absorbent structure 200 absorbs TM ripple in a large number and weak absorbing TM ripple during high frequency when low frequency, and though simultaneously high frequency or low frequency time equal weak absorbing TE ripple, thus show Polarization selection.
Above-mentioned absorbent structure, it is possible to be applied in aircraft field, the covering as aircraft such as aircraft uses, it is achieved specific suction ripple demand.
In the above description, known textural element and step are not described in detail. But it will be understood and appreciated by those or skill in the art that and by various technique means, corresponding textural element and step can be realized. In addition, in order to form identical textural element, those skilled in the art can also design method with method described above and incomplete same. In addition, although respectively describing each embodiment above, but this and do not mean that the measure in each embodiment can not advantageously be combined.
Above embodiment of the present utility model is described. But, these embodiments are only used to the object illustrated, and are not intended to limit scope of the present utility model. Scope of the present utility model is limited by claims and Equivalent thereof. Not departing from scope of the present utility model, those skilled in the art can make multiple replacement and amendment, and these substitute and amendment all should drop within scope of the present utility model.
Claims (13)
1. an absorbent structure, it is characterised in that, comprising:
At least one rhythmo structure, the resistive layer that described rhythmo structure comprises substrate and is positioned on substrate,
Wherein, described resistive layer comprises the multiple middle maltese cross frame structure of the arrangement that is in alignment with each other.
2. absorbent structure according to claim 1, it is characterised in that, the many row arrangements of described multiple middle maltese cross frame structure.
3. absorbent structure according to claim 2, it is characterised in that, described multiple middle maltese cross frame structure is arranged in array.
4. absorbent structure according to claim 3, it is characterised in that, described array comprises multiple structural unit, and each structural unit is provided with a described middle maltese cross frame structure.
5. absorbent structure according to claim 4, it is characterised in that, described middle maltese cross frame structure is placed in the middle in described structural unit.
6. absorbent structure according to claim 4, it is characterised in that, described middle maltese cross frame structure is enclosed with the 2nd frame shape structure by the first frame shape structure and closes,
The first party of described multiple structural unit is to the length direction for described first frame shape structure, and second direction is the length direction of described 2nd frame shape structure, and in the first direction and a second direction, the cross frame structure of structural unit described in adjacent two is spaced apart.
7. absorbent structure according to claim 6, it is characterised in that, the length direction of described first frame shape structure is perpendiculared to one another with the length direction of described 2nd frame shape structure, and the length of described first frame shape structure is greater than the length of described 2nd frame shape structure.
8. absorbent structure according to claim 6, it is characterised in that, the width of described first frame shape structure is less than the width of described 2nd frame shape structure.
9. absorbent structure according to claim 6, it is characterised in that, described first frame shape structure is identical with the live width of described 2nd frame shape structure.
10. absorbent structure according to claim 1, it is characterised in that, described resistive layer is clipped between two substrates.
11. absorbent structures according to claim 1, it is characterised in that, described absorbent structure comprises multiple rhythmo structure, and the structural unit shape of the resistive layer in described multiple rhythmo structure is identical but resistivity different.
12. absorbent structures according to claim 1, it is characterised in that, described absorbent structure comprises multiple rhythmo structure, and the structural unit size of the resistive layer in described multiple rhythmo structure is different to obtain different resistivity.
13. 1 kinds of aircraft skin, it is characterised in that, comprise the absorbent structure described in the arbitrary item of claim 1��12.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620050108.6U CN205303689U (en) | 2016-01-19 | 2016-01-19 | Absorbent structure and aircraft covering |
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| CN201620050108.6U CN205303689U (en) | 2016-01-19 | 2016-01-19 | Absorbent structure and aircraft covering |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109041561A (en) * | 2018-08-28 | 2018-12-18 | 中国人民解放军海军航空大学青岛校区 | A kind of electromagnetic shielding method of technique for aircraft composite covering |
| CN112864633A (en) * | 2021-01-08 | 2021-05-28 | 中南大学 | Broadband microwave absorber based on super surface |
| CN113172952A (en) * | 2021-04-12 | 2021-07-27 | 上海戎科特种装备有限公司 | P-band radar attenuation light structure and preparation method thereof |
-
2016
- 2016-01-19 CN CN201620050108.6U patent/CN205303689U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109041561A (en) * | 2018-08-28 | 2018-12-18 | 中国人民解放军海军航空大学青岛校区 | A kind of electromagnetic shielding method of technique for aircraft composite covering |
| CN112864633A (en) * | 2021-01-08 | 2021-05-28 | 中南大学 | Broadband microwave absorber based on super surface |
| CN112864633B (en) * | 2021-01-08 | 2022-03-04 | 中南大学 | Broadband microwave absorber based on super surface |
| CN113172952A (en) * | 2021-04-12 | 2021-07-27 | 上海戎科特种装备有限公司 | P-band radar attenuation light structure and preparation method thereof |
| CN113172952B (en) * | 2021-04-12 | 2023-02-21 | 上海戎科特种装备有限公司 | P-band radar attenuation light structure and preparation method thereof |
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