CN114512819B - Low-loss wave-absorbing wave-transmitting integrated stealth cover structure - Google Patents
Low-loss wave-absorbing wave-transmitting integrated stealth cover structure Download PDFInfo
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- CN114512819B CN114512819B CN202210148989.5A CN202210148989A CN114512819B CN 114512819 B CN114512819 B CN 114512819B CN 202210148989 A CN202210148989 A CN 202210148989A CN 114512819 B CN114512819 B CN 114512819B
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- wave
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- metal frame
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- 239000002184 metal Substances 0.000 claims abstract description 105
- 235000001674 Agaricus brunnescens Nutrition 0.000 claims abstract description 33
- 239000011358 absorbing material Substances 0.000 claims abstract description 21
- 239000011152 fibreglass Substances 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 14
- 230000008878 coupling Effects 0.000 abstract description 4
- 238000010168 coupling process Methods 0.000 abstract description 4
- 238000005859 coupling reaction Methods 0.000 abstract description 4
- 238000003780 insertion Methods 0.000 abstract description 4
- 230000037431 insertion Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000001629 suppression Effects 0.000 description 3
- 239000006096 absorbing agent Substances 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/11—Hard structures, e.g. dams, dykes or breakwaters
Landscapes
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention discloses a low-loss wave-absorbing and wave-transmitting integrated stealth cover structure which comprises a metal frame body, wave-absorbing materials, mushroom structures and glass fiber reinforced plastic covers, wherein the metal frame body is internally hollow, the upper end and the lower end of the metal frame body are both provided with openings, the glass fiber reinforced plastic covers are both installed at the upper end and the lower end of the metal frame body, the wave-absorbing materials are contained in a hollow cavity of the metal frame body, a plurality of mushroom structures are fixed on the side wall of the metal frame body, the mushroom structures comprise round metal sheets which are arranged in parallel with the outer side wall of the metal frame body, and metal rods which are connected with the round metal sheets and the outer side wall of the metal frame body, and the two ends of each metal rod are respectively electrically connected with the round metal sheets and the metal frame body. According to the low-loss wave-absorbing and wave-transmitting integrated stealth cover structure, the wave-transmitting channel and the wave-absorbing channel which are mutually independent are designed on the surface of the material, so that the coupling degree between in-band transmitted electromagnetic waves and the wave-absorbing material is reduced, and the insertion loss in a passband is reduced on the premise of realizing the out-of-band wave-absorbing performance of the material.
Description
Technical Field
The invention relates to the technical field of functional electromagnetic materials, in particular to a low-loss wave-absorbing wave-transmitting integrated stealth cover structure.
Background
At present, the design for hiding the large-angle area of the antenna of the electronic equipment mainly comprises the steps of additionally arranging a wave-absorbing and wave-transmitting integrated stealth cover on the periphery of the antenna, and realizing the stealth of the large-angle area of the antenna through in-band frequency wave-selecting and wave-transmitting and out-of-band wave-absorbing.
However, when the low-loss frequency selective wave-transmitting material and the wave-absorbing material are integrated in the stealth radome, the electromagnetic waves in the passband are inevitably coupled with the wave-absorbing material in the process of penetrating the frequency selective wave-transmitting material. The conventional solution is to design a wave absorbing material with steep cut-off characteristics, so that the coupling degree between the electromagnetic wave with a pass band and the wave absorbing material is reduced as much as possible, and the loss is reduced. However, the isolation effect of the design scheme is limited, so that the insertion loss of the existing wave-absorbing and wave-transmitting integrated material is larger than that of the frequency-selecting material.
Disclosure of Invention
The invention mainly aims to provide a low-loss wave-absorbing wave-transmitting integrated stealth cover structure, which aims to realize the stealth of a large angle area of an antenna through in-band frequency wave-selecting wave-transmitting and out-of-band wave-absorbing.
In order to achieve the above purpose, the invention provides a low-loss wave-absorbing wave-transmitting integrated stealth cover structure, which comprises a metal frame body, wave-absorbing materials, a mushroom structure and a glass fiber reinforced plastic skin, wherein,
The inside cavity of metal framework sets up and upper and lower both ends all open-ended setting, and glass steel covering is all installed at the upper and lower both ends opening part of metal framework, and the inside wave absorbing material that holds of cavity of metal framework is fixed with a plurality of mushroom structures on the lateral wall of metal framework, and mushroom structure includes the circular sheetmetal that sets up with metal framework lateral wall parallel and connects circular sheetmetal and metal framework lateral wall's metal pole, and the both ends of metal pole are connected with circular sheetmetal and metal framework electricity respectively.
Preferably, the metal frame forms a cuboid frame structure, and a plurality of mushroom structures are fixed on two side walls of the metal frame.
Preferably, the mushroom structures are arranged at equal intervals on the side wall of the metal frame body, and the mushroom structures are arranged at equal heights on the side wall of the metal frame body.
Preferably, the length and the width of the metal frame body are equal, the length and the width of the metal frame body are 8 mm-30 mm, and the height of the metal frame body is 8 mm-30 mm.
Preferably, all mushroom structures on the metal frame are equal in shape and size.
Preferably, the wave absorbing material is an analog circuit wave absorber or a magnetic wave absorbing patch.
Preferably, the metal rod is arranged vertically to the outer side wall of the metal frame connected with the metal rod.
Preferably, the thickness of the round metal sheet is 5-50 μm, and the length of the metal rod is 0.5-5 mm.
Preferably, the distance between two adjacent round metal sheets on the same side wall of the metal frame body is 5-50 μm.
Preferably, the thickness of the glass fiber reinforced plastic skin is 0.3 mm-2 mm.
According to the low-loss wave-absorbing and wave-transmitting integrated stealth cover structure, the wave-transmitting channel and the wave-absorbing channel which are mutually independent are designed on the surface of the material, so that the coupling degree between in-band transmitted electromagnetic waves and the wave-absorbing material is reduced, and the insertion loss in a passband is reduced on the premise of realizing the out-of-band wave-absorbing performance of the material. The low-loss wave-absorbing wave-transmitting integrated stealth cover structure can effectively solve the problem of stealth of radar waves in a large-angle range of an antenna of electronic equipment on the premise of not reducing the acting distance of the antenna. Meanwhile, the frequency-selective wave-transmitting channel also has steep cut-off characteristics of upper and lower sidebands of a passband, and the frequency-selective characteristic performance of the whole radome material is excellent.
Drawings
FIG. 1 is a schematic structural view of a low-loss wave-absorbing wave-transmitting integrated stealth cover structure of the present invention;
FIG. 2 is a schematic diagram showing a cross-sectional structure of a metal frame in the low-loss wave-absorbing wave-transmitting integrated stealth cover structure of the present invention;
FIG. 3 is a schematic diagram of a cross-sectional structure of a metal frame and a mushroom structure in the low-loss wave-absorbing wave-transmitting integrated stealth cover structure of the present invention;
FIG. 4 is a schematic cross-sectional view of the low-loss wave-absorbing wave-transmitting integral stealth mask structure of the present invention under a dimension scale;
FIG. 5 is a schematic cross-sectional view of the low-loss wave-absorbing wave-transmitting integral stealth mask structure of the present invention with another dimension labeled;
FIG. 6 is a schematic diagram of the mushroom structure in the low-loss wave-absorbing wave-transmitting integral stealth cover structure of the present invention;
fig. 7 is a diagram showing simulation results of the structure of the low-loss wave-absorbing wave-transmitting integrated stealth cover.
In the figure, 11-glass fiber reinforced plastic skin, 12-metal frame body, 121-wave absorbing material, 13-mushroom structure, 131-metal rod and 132-round metal sheet.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It should be noted that, in the description of the present invention, the terms "transverse", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Referring to fig. 1 to 6, in the preferred embodiment, a low-loss wave-absorbing wave-transmitting integral stealth cover structure comprises a metal frame 12, a wave-absorbing material 121, a mushroom structure 13 and a glass fiber reinforced plastic skin 11, wherein,
The inside cavity of metal framework 12 sets up and upper and lower both ends all open-ended setting, glass steel covering 11 is all installed to the upper and lower both ends opening part of metal framework 12, wave absorbing material 121 (be used for realizing the absorption function to out of band electromagnetic wave) is held to the inside hollow cavity of metal framework 12, be fixed with a plurality of mushroom structures 13 on the lateral wall of metal framework 12, mushroom structures 13 include with metal framework 12 lateral wall parallel arrangement's circular sheetmetal 132 and connect circular sheetmetal 132 and metal framework 12 lateral wall's metal pole 131, metal pole 131's both ends are connected with circular sheetmetal 132 and metal framework 12 electricity respectively.
The circular metal sheet 132, the metal rod 131 and the outer side wall of the metal frame 12 together form a capacitor structure, the capacitor structure forms a wave-transmitting channel, and the wave-absorbing material 121 forms a wave-absorbing channel, so that the integral stealth cover can form the wave-transmitting channel and the wave-absorbing channel which are independent of each other.
Specifically, referring to fig. 2, the metal frame 12 forms a cuboid frame structure, a plurality of mushroom structures 13 are fixed on two side walls of the metal frame 12, and simultaneously, the shapes and the sizes of all the mushroom structures 13 on the metal frame 12 are equal, so that the low-loss wave-absorbing wave-transmitting integrated stealth cover structure forms a pseudo three-dimensional structure, namely, the mushroom structures 13 of the low-loss wave-absorbing wave-transmitting integrated stealth cover in two horizontal directions are uniformly arranged.
In the embodiment, a total of 6 mushroom structures 13 are disposed on two side walls of the metal frame 12, wherein one mushroom structure 13 has a center of the side wall of the metal frame 12, and the other two mushroom structures 13 have centers of centers that are symmetrical with the middle mushroom structure 13 as a center. The periodic structures are periodically arranged in two horizontal directions by taking the glass fiber reinforced plastic skin 11+the metal frame body 12+the mushroom structures 13+ga as space periods. And ga is the distance between all metal sheets to the metal wall of the adjacent cell.
The mushroom structures 13 are arranged at equal intervals on the side wall of the metal frame 12, and the mushroom structures 13 are arranged at equal heights on the side wall of the metal frame 12.
The length and width of the metal frame 12 are equal (W1), the length and width of the metal frame 12 are 8-30 mm, and the height of the metal frame 12 (H1 in the figure) is 8-30 mm. Preferably, the distance from the center of all the metal rods 131 to the bottom end face of the metal frame 12 is H1/2.
Specifically, the wave absorbing material 121 is an analog circuit wave absorber or a magnetic wave absorbing patch. The wave absorbing material 121 has a reflectivity of less than-10 dB in the out-of-band of the material. In-band electromagnetic waves are transmitted through gaps between the metal cavities, including the mushroom structures 13.
The metal rod 131 is disposed perpendicularly to the outer side wall of the metal frame 12 to which it is connected. The thickness of the circular metal piece 132 (W3 in the drawing) is 5 μm to 50 μm, and the length of the metal rod 131 (W2 in the drawing) is 0.5mm to 5mm.
The distance between two adjacent circular metal sheets 132 on the same side wall of the metal frame 12 is 5 μm to 50 μm. The thickness of the glass fiber reinforced plastic skin 11 is 0.3 mm-2 mm. The gap between adjacent circular metal sheets 132 may be empty or may be filled with a low loss dielectric.
The simulation result of the low-loss wave-absorbing and wave-transmitting integrated stealth cover structure is shown in fig. 7, the solid line in fig. 7 is the wave-transmitting coefficient (S21), the broken line is the reflection coefficient (S11), and as can be seen in fig. 7, the center frequency of the low-loss wave-absorbing and wave-transmitting integrated stealth cover structure is 6GHz, the transition zone from the pass band to the stop band (-10 dB suppression degree) is only 0.5GHz, and the suppression degree of the frequency selection in the whole C frequency band is more than 15dB. The frequencies of the two transmission zeros above the pass band are 3GHz and 9GHz respectively, and the out-of-band suppression degree of the stop band is more than 15dB.
According to the low-loss wave-absorbing and wave-transmitting integrated stealth cover structure, the wave-transmitting channel and the wave-absorbing channel which are mutually independent are designed on the surface of the material, so that the coupling degree between in-band transmitted electromagnetic waves and the wave-absorbing material 121 is reduced, and the insertion loss in a passband is reduced on the premise of realizing the out-of-band wave-absorbing performance of the material. The low-loss wave-absorbing wave-transmitting integrated stealth cover structure can effectively solve the problem of stealth of radar waves in a large-angle range of an antenna of electronic equipment on the premise of not reducing the acting distance of the antenna. Meanwhile, the frequency-selective wave-transmitting channel also has steep cut-off characteristics of upper and lower sidebands of a passband, and the frequency-selective characteristic performance of the whole radome material is excellent.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but is intended to cover all equivalent structures modifications, direct or indirect application in other related arts, which are included in the scope of the present invention.
Claims (10)
1. A low-loss wave-absorbing wave-transmitting integrated stealth cover structure is characterized by comprising a metal frame body, wave-absorbing materials, a mushroom structure and a glass fiber reinforced plastic skin, wherein,
The inside cavity of metal framework sets up and upper and lower both ends all open-ended setting, and glass steel covering is all installed at the upper and lower both ends opening part of metal framework, and the inside wave absorbing material that holds of cavity of metal framework is fixed with a plurality of mushroom structures on the lateral wall of metal framework, and mushroom structure includes the circular sheetmetal that sets up with metal framework lateral wall parallel and connects circular sheetmetal and metal framework lateral wall's metal pole, and the both ends of metal pole are connected with circular sheetmetal and metal framework electricity respectively.
2. The low-loss wave-absorbing wave-transmitting integrated stealth cover structure according to claim 1, wherein the metal frame forms a rectangular frame structure, and a plurality of mushroom structures are fixed on both side walls of the metal frame.
3. The low-loss wave-absorbing and wave-transmitting integrated stealth cover structure according to claim 2, wherein the mushroom structures are arranged on the side wall of the metal frame at equal intervals, and the mushroom structures are arranged on the side wall of the metal frame at equal heights.
4. The low-loss wave-absorbing and wave-transmitting integrated stealth cover structure according to claim 2, wherein the length and the width of the metal frame body are equal, the length and the width of the metal frame body are 8 mm-30 mm, and the height of the metal frame body is 8 mm-30 mm.
5. The low loss wave absorbing and transmitting integral stealth cover structure of claim 2, wherein all mushroom structures on the metal frame are equal in shape and size.
6. The low-loss wave-absorbing wave-transmitting integral stealth cover structure of claim 1, wherein the wave-absorbing material is an analog circuit wave-absorbing body or a magnetic wave-absorbing patch.
7. The low-loss wave-absorbing and wave-transmitting integrated stealth cover structure according to claim 1, wherein the metal rod is vertically arranged on the outer side wall of the metal frame body connected with the metal rod.
8. The low-loss wave-absorbing and wave-transmitting integrated stealth cover structure according to claim 2, wherein the thickness of the circular metal sheet is 5 μm to 50 μm, and the length of the metal rod is 0.5mm to 5mm.
9. The low-loss wave-absorbing and wave-transmitting integrated stealth cover structure according to claim 8, wherein a distance between two adjacent circular metal sheets on the same side wall of the metal frame is 5 μm to 50 μm.
10. The low-loss wave-absorbing and wave-transmitting integral stealth cover structure according to any one of claims 1 to 9, wherein the glass fiber reinforced plastic skin has a thickness of 0.3mm to 2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210148989.5A CN114512819B (en) | 2022-02-18 | 2022-02-18 | Low-loss wave-absorbing wave-transmitting integrated stealth cover structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210148989.5A CN114512819B (en) | 2022-02-18 | 2022-02-18 | Low-loss wave-absorbing wave-transmitting integrated stealth cover structure |
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| Publication Number | Publication Date |
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| CN114512819A CN114512819A (en) | 2022-05-17 |
| CN114512819B true CN114512819B (en) | 2024-07-09 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107946763A (en) * | 2017-12-26 | 2018-04-20 | 航天科工武汉磁电有限责任公司 | One kind inhales ripple wave transparent integration metamaterial antenna cover and its application |
| CN110247196A (en) * | 2019-06-20 | 2019-09-17 | 南京航空航天大学 | The frequency that a kind of intermediate frequency broadband wave transparent, high and low frequency inhale wave selects wave-absorber |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN208674331U (en) * | 2018-06-08 | 2019-03-29 | 深圳市华讯方舟雷达技术装备有限公司 | Integrate the antenna filter structure of wave transparent cut-off and absorbing property |
| EP3813194A4 (en) * | 2018-07-27 | 2022-04-06 | Kuang-chi Cutting Edge Technology Ltd. | Wave absorption and transmission integrated device, and radome |
| CN112072220B (en) * | 2020-07-13 | 2021-10-19 | 宁波大学 | Absorptive broadband band-pass spatial filter |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107946763A (en) * | 2017-12-26 | 2018-04-20 | 航天科工武汉磁电有限责任公司 | One kind inhales ripple wave transparent integration metamaterial antenna cover and its application |
| CN110247196A (en) * | 2019-06-20 | 2019-09-17 | 南京航空航天大学 | The frequency that a kind of intermediate frequency broadband wave transparent, high and low frequency inhale wave selects wave-absorber |
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