CN114144053B - Composite wave absorber with dual dynamic regulation and control and preparation method and application thereof - Google Patents
Composite wave absorber with dual dynamic regulation and control and preparation method and application thereof Download PDFInfo
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- CN114144053B CN114144053B CN202111585907.5A CN202111585907A CN114144053B CN 114144053 B CN114144053 B CN 114144053B CN 202111585907 A CN202111585907 A CN 202111585907A CN 114144053 B CN114144053 B CN 114144053B
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- 239000002131 composite material Substances 0.000 title claims abstract description 44
- 239000006096 absorbing agent Substances 0.000 title claims abstract description 41
- 238000002360 preparation method Methods 0.000 title abstract description 13
- 230000009977 dual effect Effects 0.000 title description 8
- 229910052751 metal Inorganic materials 0.000 claims abstract description 46
- 239000002184 metal Substances 0.000 claims abstract description 46
- 239000000463 material Substances 0.000 claims abstract description 30
- 239000003292 glue Substances 0.000 claims abstract description 17
- 238000010521 absorption reaction Methods 0.000 claims abstract description 16
- 230000000737 periodic effect Effects 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 6
- 239000003990 capacitor Substances 0.000 claims description 5
- 238000001755 magnetron sputter deposition Methods 0.000 claims description 5
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 3
- 238000004544 sputter deposition Methods 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 239000004020 conductor Substances 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000003491 array Methods 0.000 abstract description 2
- 239000011358 absorbing material Substances 0.000 description 6
- 239000002048 multi walled nanotube Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000004205 dimethyl polysiloxane Substances 0.000 description 2
- 235000013870 dimethyl polysiloxane Nutrition 0.000 description 2
- VLKZOEOYAKHREP-UHFFFAOYSA-N hexane Substances CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- CXQXSVUQTKDNFP-UHFFFAOYSA-N octamethyltrisiloxane Chemical compound C[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C CXQXSVUQTKDNFP-UHFFFAOYSA-N 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000004987 plasma desorption mass spectroscopy Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 2
- 229920001225 polyester resin Polymers 0.000 description 2
- 239000004645 polyester resin Substances 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- GCSJLQSCSDMKTP-UHFFFAOYSA-N ethenyl(trimethyl)silane Chemical compound C[Si](C)(C)C=C GCSJLQSCSDMKTP-UHFFFAOYSA-N 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- -1 poly (dimethyl-methyl hydrogen Chemical compound 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0073—Shielding materials
- H05K9/0075—Magnetic shielding materials
- H05K9/0077—Magnetic shielding materials comprising superconductors
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- 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
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Aerials With Secondary Devices (AREA)
Abstract
The invention relates to a composite wave absorber with double dynamic regulation and control and a preparation method and application thereof, and belongs to the technical field of wave absorber preparation. The invention discloses a composite wave absorber with double dynamic regulation, which is provided with a plurality of wave absorbing units of periodic arrays in the horizontal direction and the vertical direction, wherein the wave absorbing units are composed of a metal super surface, a dielectric layer formed by magnetorheological glue materials and a metal backboard which is larger than the skin depth of incident waves from top to bottom; and secondly, taking the magnetorheological glue as a dielectric layer, providing certain loss capacity, improving absorption performance, and dynamically adjusting electromagnetic parameters of the dielectric layer by utilizing the magnetic field to regulate and control appearance of the magnetorheological glue.
Description
Technical Field
The invention belongs to the technical field of wave-absorbing preparation, and relates to a composite wave-absorbing body with double dynamic regulation and control, and a preparation method and application thereof.
Background
With the development and advancement of the information age, electromagnetic waves have been spread over the entire living space of human beings as carriers of information, and thus, wave-absorbing materials have been attracting attention, particularly in the military field, both in basic research and engineering application fields. The wave-absorbing material is a material which absorbs incident electromagnetic waves, converts the incident electromagnetic waves into other forms of energy and consumes the energy. The traditional wave absorbing material is based on the electromagnetic property of the material, and can effectively convert the incident electromagnetic wave into other forms of energy to complete electromagnetic wave absorption. The wave-absorbing properties of a material depend mainly on two parameters, namely the permittivity and the permeability.
The electromagnetic metamaterial is a novel artificial composite material which is designed artificially, has unique electromagnetic characteristics, can acquire properties which are not possessed by natural materials, such as negative magnetic permeability, negative dielectric constant and the like, realizes free and efficient control of incident electromagnetic waves, and has become a research hotspot of physics, materialization and electromagnetism. Since the introduction of metamaterial absorbers by landy.n.i. et al in 2008, metamaterials have been widely studied in the field of electromagnetic wave absorption. The currently reported metamaterial wave absorber dielectric layer is basically made of conventional loss materials, such as epoxy resin (FR-4), polyester resin (PET) and the like, and the loss mechanism of the wave absorber formed by the metamaterial wave absorber dielectric layer is mostly dependent on dielectric loss of the materials, is generally thick and heavy, has relatively fixed absorption frequency, and is difficult to adapt to the new requirements of the fields of increasingly lightweight equipment such as aerospace, military stealth/reconnaissance and the like.
Therefore, the development of a wave-absorbing material having higher wave-absorbing performance, a thinner material thickness, and dynamically adjustable absorption frequency range is of great value.
Disclosure of Invention
Accordingly, one of the purposes of the present invention is to provide a composite absorber with dual dynamic regulation; the second purpose of the invention is to provide a preparation method of the composite wave absorber with double dynamic regulation; the invention further aims to provide an application of the composite wave absorber with double dynamic regulation in electromagnetic shielding or military stealth.
In order to achieve the above purpose, the present invention provides the following technical solutions:
1. the composite wave absorber with double dynamic regulation and control is provided with a plurality of wave absorbing units in periodic arrays in the horizontal direction and the vertical direction, and the wave absorbing units are composed of a metal super surface, a medium layer made of magnetorheological rubber materials and a metal backboard which is larger than the skin depth of incident waves from top to bottom.
Preferably, the working frequency of the composite wave absorber is 2-18 GHz.
Preferably, the metal super surface is a periodic resonance unit structure, the metal super surface is a central symmetry structure, and the centers of the metal super surface, the dielectric layer and the metal backboard are overlapped;
the metallic supersurface comprises a resonant ring having an opening and an active device introduced at the opening of the resonant ring.
Further preferably, the active device is any one or more of a capacitor, an inductor and a diode, and the active device is a patch package.
Preferably, the magnetorheological glue material has an electromagnetic wave absorption function; the magnetorheological gel material is specifically an MRE material.
Preferably, the metal of the metal backboard is a metal film formed by good conductors, and the metal is any one of copper or aluminum.
Preferably, the metal super surface and the metal backboard have the same thickness; the dielectric layer and the metal backboard are rectangular solids with equal length and width.
2. The preparation method of the composite wave absorber comprises the following steps:
(1) Sputtering metal on one surface of a dielectric layer made of a magnetorheological glue material by a magnetron sputtering method, and introducing a mask plate to form a patterned metal super surface on the dielectric layer;
(2) Attaching a metal backboard to the other surface of the dielectric layer through an adhesive to obtain a wave absorbing unit;
(3) The wave absorbing units are periodically arranged in the horizontal and vertical directions to form a light and efficient composite wave absorbing body.
3. The composite wave absorber is applied to electromagnetic shielding or military stealth.
The invention has the beneficial effects that:
1. the invention discloses a composite wave absorber with double dynamic regulation and control and a preparation method thereof, wherein the wave absorber is provided with a plurality of wave absorbing units which are periodically arrayed in the horizontal direction and the vertical direction, the wave absorbing units are composed of a metal super surface, a dielectric layer formed by magnetorheological glue materials and a metal backboard which is larger than the skin depth of incident waves from top to bottom, firstly, the super surface resonance unit is constructed by utilizing a magnetron sputtering method, and the constructed super surface is provided with a resonance opening and a reserved welding position of an active device, so that the resonance frequency and the equivalent impedance can be conveniently adjusted by changing the parameters of the active device; and secondly, the rheological glue is used as a dielectric layer, so that a certain loss capacity is provided, the absorption performance is improved, and the electromagnetic parameters of the dielectric layer are dynamically adjusted by utilizing the magnetic field to regulate the appearance and the appearance of the rheological glue. The composite wave absorber has better absorption performance in 2-18 GHz.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Drawings
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in the following preferred detail with reference to the accompanying drawings, in which:
FIG. 1 is a block diagram of a composite absorber with dual dynamic regulation prepared in example 1;
FIG. 2 is a cross-sectional view of the composite wave absorber with dual dynamic regulation prepared in example 1;
fig. 3 is a top view of the wave absorbing unit prepared in example 1;
FIG. 4 is a two-dimensional plan view of the composite wave-absorbing body prepared in example 1;
FIG. 5 is a flow chart showing the preparation of a dielectric layer made of a magnetorheological gel material in example 1;
FIG. 6 is a graph showing the comparison of reflection curves of the composite absorber prepared in example 1 under the action of different externally applied magnetic fields;
FIG. 7 is a graph showing the comparison of reflection curves of composite absorbers containing active devices of different parameters prepared in example 2;
wherein 1 is a super surface, 2 is a dielectric layer, 3 is a metal backboard, 4 is a first active device, 5 is a second active device, 6 is a third active device, 7 is a fourth active device, h is the thickness of the super surface and the metal backboard, t is the height of the dielectric layer, and p is the side length of the dielectric layer made of magnetorheological glue material.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present invention by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.
Example 1
The preparation method of the composite wave absorber with double dynamic regulation comprises the following steps:
(1) Four openings are symmetrically formed on a circular ring with a cross in the middle, patch-type packaged active devices are respectively arranged at the four openings to form a super-surface material, wherein the super-surface material is respectively a first active device, a second active device, a third active device and a fourth active device, the four active devices are identical devices, in the embodiment, the active devices are connected in parallel through a resistor and a capacitor, and the resistance value of the resistor is 1000Ω and the capacitance value of the resistor is 0.5pF.
(2) Preparing a medium layer formed by a magnetorheological glue material: firstly, weighing a certain amount of MWCNTs, adding N-hexane into the MWCNTs, wherein the added amount is that the MWCNTs can be completely wetted, stirring the MWCNTs sufficiently, and then dispersing the MWCNTs by utilizing ultrasonic oscillation; after N-hexane is evaporated, MWCNTs are mixed with a component A (the components are poly (dimethyl-methyl vinyl silane) prepolymer and a trace platinum catalyst) of PDMS (Dow Corning 184 silicon rubber matrix, also called D-silicon rubber for short), after full stirring, carbonyl iron powder is uniformly distributed in the rubber by using an ultrasonic vibration instrument, and then a component B (the components are a prepolymer with vinyl side chains and a cross-linking agent poly (dimethyl-methyl hydrogen biosiloxide)) of PDMS and a proper amount of carbonyl iron powder are added and fully stirred. Then placing the mixture in a vacuum drier for vacuumizing and removing bubbles, standing, pouring the mixture into a die made of aluminum alloy material, placing the die in an electromagnet, and curing and forming the die for 90 minutes under a magnetic field of 200mT to obtain the magnetic sensitive magnetorheological glue dielectric layer MRE film (with the side length of 8mm and the height of 1.5 mm) with various properties.
(3) Sputtering a super-surface material onto one surface of a dielectric layer formed by a magnetorheological glue material in a magnetron sputtering mode, and introducing a mask plate to form a patterned metal super-surface on the dielectric layer;
(4) Preparing a wave absorbing unit: attaching a metal backboard to the other surface of the dielectric layer through an adhesive (UV glue) to obtain a wave absorbing unit;
(5) Preparing a composite wave absorber: and (3) periodically arranging 25 wave-absorbing units in the horizontal direction and 25 wave-absorbing units in the vertical direction to form the composite wave-absorbing body with double dynamic regulation.
Fig. 1 is a structural diagram of a composite absorber with dual dynamic regulation prepared in example 1, wherein 1 is a super surface, 2 is a dielectric layer, 3 is a metal back plate, 4 is a first active device, 5 is a second active device, 6 is a third active device, and 7 is a fourth active device.
Fig. 2 is a cross-sectional view of the composite absorber with dual dynamic regulation prepared in example 1, where h is the thickness of the supersurface and the metal back plate, and t is the height of the dielectric layer.
Fig. 3 is a top view of the wave-absorbing unit prepared in example 1, wherein p is the side length of the dielectric layer composed of the magnetorheological gel material.
Fig. 4 is a two-dimensional plan view of the composite wave-absorbing body prepared in example 1, the overall size being 200mm ﹡ mm.
Fig. 5 is a flow chart of the preparation of a dielectric layer made of a magnetorheological gel material in example 1.
FIG. 6 is a graph showing the comparison of reflection curves of the composite absorber prepared in example 1 under the action of different externally applied magnetic fields, and as can be seen from FIG. 6, when the magnitude of the applied magnetic field is 0mT, the absorption peak frequency is about 10 GHz; the absorption peak frequency was about 10.5GHz when the applied magnetic field was 200mT, and about 9.5GHz when the applied magnetic field was 400 mT. It can be seen that the absorption peak frequency and bandwidth of the composite absorber can be varied by varying the magnitude of the applied magnetic field.
Example 2
First, the MRE material, the super surface structure, and the metal back sheet were prepared by the method of the foregoing example 1.
Next, four identical active devices, namely a first active device, a second active device, a third active device and a fourth active device, are provided according to the method in embodiment 1, wherein the active devices are resistors and capacitors connected in parallel. The absorption performance of the composite wave-absorbing material is changed by changing the parameters of the active device on the super surface, such as setting the resistance value of a resistor to 1000 ohms, and the capacitance values of a capacitor to five values of 0.5pF, 1pF, 1.5pF, 2pF and 5pF respectively.
Fig. 7 is a graph comparing reflection curves of the composite wave-absorbing bodies of the active devices with different parameters prepared in example 2, and it can be seen from fig. 7 that when the resistance value is determined to be 1000 ohms, increasing the capacitance value can make the peak frequency of the composite wave-absorbing material move toward the low frequency direction, and the absorption bandwidth is also adjusted to a certain extent.
In summary, the invention discloses a composite wave absorber with dual dynamic regulation and control and a preparation method thereof, wherein the wave absorber is provided with a plurality of wave absorbing units which are periodically arrayed in the horizontal and vertical directions, the wave absorbing units are composed of a metal super surface, a dielectric layer formed by magneto-rheological glue materials and a metal backboard which is larger than the skin depth of incident waves from top to bottom, firstly, the structure of the super surface resonance unit is carried out by utilizing a magnetron sputtering method, and the constructed super surface is provided with a resonance opening and a reserved welding position of an active device, so that the resonance frequency and the equivalent impedance can be conveniently adjusted by changing the parameters of the active device; and secondly, the rheological glue is used as a dielectric layer, so that a certain loss capacity is provided, the absorption performance is improved, and the electromagnetic parameters of the dielectric layer are dynamically adjusted by utilizing the magnetic field to regulate the appearance and the appearance of the rheological glue. The composite wave absorber has excellent absorption performance in the working frequency of 2-18 GHz.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present invention, which is intended to be covered by the claims of the present invention.
Claims (8)
1. The composite wave absorber is characterized by comprising a plurality of wave absorbing units which are periodically arrayed in the horizontal direction and the vertical direction, wherein the wave absorbing units are composed of a metal super surface, a dielectric layer made of magnetorheological rubber material and a metal backboard which is larger than the skin depth of incident waves from top to bottom;
the metal super surface is of a periodic resonance unit structure, the metal super surface is of a central symmetry structure, and the centers of the metal super surface, the dielectric layer and the metal backboard are overlapped;
the metal supersurface comprises a resonant ring having an opening and an active device introduced at the opening of the resonant ring;
the magnetorheological gel material has an electromagnetic wave absorption function.
2. The composite wave absorber of claim 1 wherein the composite wave absorber has an operating frequency of 2 to 18GHz.
3. The composite wave absorber of claim 1 wherein the active device is any one or more of a capacitor, an inductor, or a diode, and the active device is a chip-on-package.
4. The composite wave absorber of claim 1 wherein said magnetorheological gel material is specifically an MRE material.
5. The composite wave absorber of claim 1, wherein the metal back plate metal is a metal film formed of a good conductor, and the metal is any one of copper and aluminum.
6. The composite wave absorber of claim 1 wherein said metal supersurface and metal backing plate are of equal thickness;
the dielectric layer and the metal backboard are rectangular solids with equal length and width.
7. The method for producing a composite wave absorber according to any one of claims 1 to 6, comprising the steps of:
(1) Sputtering metal on one surface of a dielectric layer made of a magnetorheological glue material by a magnetron sputtering method, and introducing a mask plate to form a patterned metal super surface on the dielectric layer;
(2) Attaching a metal backboard to the other surface of the dielectric layer through an adhesive to obtain a wave absorbing unit;
(3) The wave absorbing units are periodically arranged in the horizontal and vertical directions to form a light and efficient composite wave absorbing body.
8. Use of the composite wave absorber according to any one of claims 1 to 6 for electromagnetic shielding or military stealth.
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| CN115084869B (en) * | 2022-06-24 | 2023-08-01 | 中国人民解放军空军工程大学 | Ultra-wideband wide-angle domain stealth structural material |
| CN116995445B (en) * | 2023-09-28 | 2023-12-15 | 中北大学 | Broadband electromagnetic wave absorption/reflection switchable integrated metamaterial structure |
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