CN213520330U - Wave absorber based on cascade graphite involute windmill blade structure - Google Patents
Wave absorber based on cascade graphite involute windmill blade structure Download PDFInfo
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- CN213520330U CN213520330U CN202022538781.3U CN202022538781U CN213520330U CN 213520330 U CN213520330 U CN 213520330U CN 202022538781 U CN202022538781 U CN 202022538781U CN 213520330 U CN213520330 U CN 213520330U
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Abstract
The utility model discloses a wave-absorbing device based on cascade graphite windmill blade structure that gradually bursts at seams, including metal soleplate, be provided with first medium base plate on the metal soleplate, the vertical metal support piece that is provided with on the first medium base plate, metal support piece is provided with a plurality of graphite windmill blade that gradually bursts at seams along its direction of height interval, metal support piece's top is provided with second medium base plate. The ultra-wideband absorption in the THz wave band is realized through the cascaded multilayer graphite involute windmill blade structure, and the wave absorber is insensitive to polarization; the absorption of THz electromagnetic waves can be realized under a smaller physical size, and the absorption device has the characteristics of flexible design, good angle stability, wide application range and strong functionality.
Description
Technical Field
The utility model relates to a wave absorber especially relates to a wave absorber based on cascade graphite is gradually burst at seams windmill blade structure.
Background
The metamaterial refers to an artificial synthetic material with extraordinary physical properties, which is mainly divided into a left-handed material and a photonic material, and the extraordinary properties of the metamaterial are derived from the precise geometric structure and physical dimensions of the metamaterial. The application of the metamaterial is greatly different from the original material preparation, the traditional design idea is to design a related functional device based on the properties of the existing materials in the nature, the metamaterial is completely designed in a reverse direction, and the material with the corresponding function is manufactured according to the specific application requirements aiming at the electromagnetic waves. The method has great application prospect in various fields of communication, medical treatment, remote sensing, aerospace, military, national defense, industry and the like, thereby attracting wide research of scholars at home and abroad.
The wave-absorbing structure refers to a structure capable of absorbing external electromagnetic waves and converting the external electromagnetic waves into other energy. In recent years, the popularization of electronic devices has promoted the development of science and technology, but the wide application of electromagnetic waves also brings about a plurality of hidden dangers: the mutual interference of electronic components and electromagnetic information leakage affects human health. Therefore, the harm brought by the electromagnetic radiation has to be paid attention to, and more scientists are invested in the research of the wave-absorbing device.
Besides the efforts of scientific researchers, the appearance of the metamaterial also opens up a new direction for the development of the wave absorber. The wave absorber based on the traditional materials is complex in structure, large in size and not beneficial to integration and adjustment, so that the development of the wave absorber is greatly limited. The metamaterial wave absorber consumes the energy of incident electromagnetic waves due to the unique material and structure, reduces reflection and transmission, and achieves the wave absorbing result. Originally, the metamaterial wave absorber is concentrated on a microwave band, and more narrow-band absorption is performed, along with the continuous efforts of a large number of scientific researchers, the research on the ultra-wideband wave absorber has made great research progress on the premise of ensuring good angular stability, being not influenced by polarization state and high absorption rate.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a wave-absorbing machine based on cascade graphite windmill blade structure that gradually bursts at seams, through cascaded multilayer graphite windmill blade structure that gradually bursts at seams, realized absorbing at the ultra wide band of THz wave band, and this wave-absorbing machine is insensitive to polarization, can realize the absorption to the THz electromagnetic wave under less physical dimension, has the characteristics that the design is nimble, angle stability is good, the range of application is wide, functional strong.
The utility model discloses a realize above-mentioned utility model purpose and adopt following technical scheme:
the utility model provides a wave-absorbing device based on cascade graphite windmill blade structure that gradually bursts at seams, including metal soleplate, be provided with first medium base plate on the metal soleplate, the vertical metal support piece that is provided with on the first medium base plate, metal support piece is provided with a plurality of graphite windmill blade that gradually bursts at seams along its direction of height interval, metal support piece's top is provided with second medium base plate.
Further, graphite involute windmill blade includes the metal disc and sets up in involute profile form blade on the metal disc, metal support runs through the metal disc, and the direction of rotation of the involute profile form blade in the adjacent graphite involute windmill blade is opposite.
Further, the number of the metal supporting pieces is three, two of the metal supporting pieces are connected with the first dielectric substrate, and the remaining one of the metal supporting pieces is connected with the second dielectric substrate.
Further, the metal disc divide into individual layer metal dish, double-deck metal dish according to the direction of rotation of involute profile form blade, the hole that supplies three metal support spare to alternate is all seted up to individual layer metal dish, double-deck metal dish center and both sides.
Furthermore, the metal supporting piece is a metal rod with a cylindrical shape.
Further, a circular hole is formed in the center of the single-layer metal disc, curved holes are formed in the two sides of the single-layer metal disc respectively, and circular holes are formed in the center and the two sides of the double-layer metal disc.
Further, the metal disc is a metal disc, the diameter of the metal disc is 3.3 microns, the thickness of the involute tooth profile blade is 0.2 microns, and the width of the involute tooth profile blade is 0.6 microns.
Furthermore, the distance between the graphite involute windmill blade positioned at the top of the plurality of graphite involute windmill blades and the second medium substrate is 3 μm, and the distance between the graphite involute windmill blade positioned at the bottom of the plurality of graphite involute windmill blades and the first medium substrate is 1 μm.
Further, the distance between adjacent graphite involute windmill blades is 4 μm.
Furthermore, the second dielectric substrate is cylindrical, the diameter of the second dielectric substrate is 10.6 μm, the thickness of the second dielectric substrate is 0.5 μm, the metal bottom plate and the first dielectric substrate are rectangular, the length and the width of the metal bottom plate and the first dielectric substrate are both 10.6 μm, the thickness of the metal bottom plate is 0.3 μm, and the thickness of the first dielectric substrate is 0.8 μm.
The utility model has the advantages as follows:
the ultra-wideband absorption in the THz wave band is realized through the cascaded multilayer graphite involute windmill blade structure, and the wave absorber is insensitive to polarization;
the absorption of THz electromagnetic waves can be realized under a smaller physical size, and the absorption device has the characteristics of flexible design, good angle stability, wide application range and strong functionality.
Drawings
Fig. 1 is a perspective view of a wave absorber provided according to an embodiment of the present invention;
fig. 2 is a (1 × 2) array diagram of a wave absorber provided according to an embodiment of the present invention, in which cells are periodically arranged;
fig. 3 is a structural diagram of involute tooth profile shaped blades in different rotation directions in a wave absorber provided by an embodiment of the present invention;
fig. 4 is an involute profile diagram of involute profile blades of different rotation directions in a wave absorber provided by an embodiment of the present invention;
fig. 5 is a (2 × 2) array diagram of a wave absorber provided according to an embodiment of the present invention, in which the cells are periodically arranged;
fig. 6 is an absorption curve of the wave absorber provided in the embodiment of the present invention when the electromagnetic wave is vertically incident in the TM mode and the TE mode.
Detailed Description
The utility model provides a wave-absorbing device based on cascade graphite is gradually burst at seams windmill blade structure, this wave-absorbing device is formed by the periodic arrangement of constitutional unit. As shown in fig. 1, the structural units of the vane structure include graphite involute windmill vane structures 1, 2, 3, 4 and 5, dielectric substrates 6 and 7, a metal bottom plate 8 and metal rods 9, 10 and 11.
A wave absorber based on a cascade graphite involute windmill blade structure is generated by a method that as shown in figure 2, a metal bottom plate of the bottommost layer is a square plate with the thickness of h10.3 μm, side length a 10.6 μm, square plate of dielectric substrate and thickness h20.8 μm and 10.6 μm side length. The distance between the medium substrate and the lowest windmill blade is h 31 μm. The dielectric substrate at the top layer is cylindrical and has a thickness h40.5 μm and a diameter p of 10.6 μm. The distance between the blade and the uppermost windmill blade is h 53 μm. The distances between the windmill blades are equal and are h64 μm. The cascade connection between the windmill blades is fixed by three metal bars with the diameter d10.4 μm, length h723.4 μm. The middle metal bar is connected with the top dielectric substrate, and the two side metal bars are connected with the bottom dielectric substrate.
FIG. 3 is a block diagram of an involute profile blade. In the perspective view of fig. 1, the double-layered wind turbine blade structure is shown in the left side of fig. 3, and the single-layered wind turbine blade structure is shown in the right side of fig. 3, as viewed from above. For convenience of description, the following may be referred to as a double-layer or single-layer windmill blade structure. The blade material of the windmill blade structure is graphite, the dielectric constant is 12, and the electric conductivity is 1 multiplied by 105And (5) S/m. The thickness of the blade is h80.2 μm and 0.6 μm wide. The middle of the windmill blade structure is a circular metal disc with the diameter of d43.3 μm. The diameter of the small hole cut out from the center of the single-layer metal disk is d10.4 μm, and two widths d are cut out from each side2A diameter d of a small hole cut out from the center of the double-layer metal disk30.8 μm on both sidesTaking two diameters d from the cut20.4 μm pore.
FIG. 4 is an involute profile view of an involute profile lobe. The involute tooth profile satisfies the polar coordinate equation: thetak＝tanαk-αkAnd rk＝rb/cosαk，rb3.3 μm and rcThe radius of the inner circle and the outer circle, α, is 9.9 μmkIs the pressure angle at the point of the involute K. The value range is 0 to cos-1(rc/rb) In radians. We take the involute as the trace of the line, specifying its thickness and width to create the blade structure. The tail end of the blade adopts a round cap structure.
In the wave absorber structure based on the cascade graphite involute windmill blade structure, all metal materials are gold, and the electric conductivity is 4.561 multiplied by 107And (5) S/m. The dielectric substrate material is polyimide, the dielectric constant is 3.5, and the loss tangent is 0.0027.
The main parameters of the structure are listed as follows:
| parameter(s) | h1 | h2 | h3 | h4 | h5 | h6 |
| Value (. mu.m)) | 0.3 | 0.8 | 1 | 0.5 | 3 | 4 |
| Parameter(s) | h7 | h8 | d1 | d2 | d3 | d4 |
| Value (μm) | 23.4 | 0.2 | 0.4 | 0.4 | 0.8 | 3.3 |
| Parameter(s) | a | p | w | rb | rc | |
| Value (μm) | 10.6 | 10.6 | 0.6 | 3.3 | 9.9 |
TABLE 1
The (2X 2) array diagram of the periodic arrangement of the wave absorbing device is shown in figure 5. In fig. 6, the wave absorber is insensitive to polarization of incident electromagnetic waves, and broadband absorption of the wave absorber in the THz waveband is realized through a windmill blade structure of cascaded graphite involutes. When the electromagnetic wave is vertically incident, namely 0 degree incidence, the wave absorber bandwidth under TE polarization mode and TM polarization mode has no obvious difference, the bandwidths with absorptivity higher than 0.9 are respectively 1.88THz-22.33THz and 1.98THz-21.64THz, and the relative bandwidths are respectively 168.94% and 166.47%. In addition, the wave absorber also has the characteristic of wide angle and good stability. The bandwidth with the absorption rate higher than 0.9 can keep a relatively large value when the incident angle of the electromagnetic wave changes from 0 degrees to 60 degrees.
After specific design (cascade graphite gradually evolute's windmill blade structure), the utility model discloses can realize that this wave-absorbing device absorbs at the broadband of THz wave band, can realize the absorption to the lower frequency electromagnetic wave under less physical dimension, the utility model has the characteristics of the design is nimble, polarization is insensitive, the range of application is wide, angle stability is good etc.
The above description specifically describes the preferred embodiment of the present invention, but of course, the present invention can also adopt different forms from the above embodiments, and equivalent changes or corresponding modifications made by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope of the present invention.
Claims (10)
1. Wave absorber based on cascade graphite windmill blade structure that gradually bursts at seams, its characterized in that, including metal soleplate, be provided with first medium base plate on the metal soleplate, the vertical metal support piece that is provided with on the first medium base plate, metal support piece is provided with a plurality of graphite windmill blade that gradually bursts at seams along its direction of height, metal support piece's top is provided with second medium base plate.
2. The wave absorber based on the cascade graphite involute windmill blade structure of claim 1, wherein the graphite involute windmill blade comprises a metal disc and involute tooth profile-shaped blades arranged on the metal disc, the metal support penetrates through the metal disc, and the rotation directions of the involute tooth profile-shaped blades in adjacent graphite involute windmill blades are opposite.
3. The wave absorber based on the cascade graphite involute windmill blade structure of claim 2, wherein the number of the metal supporting pieces is three, two of the metal supporting pieces are connected with the first medium base plate, and the remaining one of the metal supporting pieces is connected with the second medium base plate.
4. The wave absorber based on the cascade graphite involute windmill blade structure of claim 3, wherein the metal disc is divided into a single-layer metal disc and a double-layer metal disc according to the rotation direction of the involute tooth profile-shaped blade, and holes for the three metal supporting pieces to penetrate through are formed in the center and two sides of the single-layer metal disc and the double-layer metal disc.
5. The wave absorber based on the cascade graphite involute windmill blade structure of claim 4, wherein the metal supporting piece is a metal rod with a cylindrical shape.
6. The wave absorber based on the cascade graphite involute windmill blade structure as claimed in claim 5, wherein a circular hole is formed in the center of the single-layer metal disc, curved holes are formed in the two sides of the single-layer metal disc respectively, and circular holes are formed in the center and the two sides of the double-layer metal disc.
7. The wave absorber based on the cascade graphite involute windmill blade structure of claim 2, wherein the metal disc is a metal disc, the diameter of the metal disc is 3.3 μm, the thickness of the involute tooth profile-shaped blade is 0.2 μm, and the width of the involute tooth profile-shaped blade is 0.6 μm.
8. The wave absorber based on the cascade graphite involute windmill blade structure of claim 1, wherein the distance between the uppermost graphite involute windmill blade and the second medium substrate of a plurality of graphite involute windmill blades is 3 μm, and the distance between the lowermost graphite involute windmill blade and the first medium substrate is 1 μm.
9. The wave absorber based on the cascade graphite involute windmill blade structure of claim 1, wherein the distance between adjacent graphite involute windmill blades is 4 μm.
10. The wave absorber based on the cascade graphite involute windmill blade structure of claim 1, wherein the second medium substrate is cylindrical, the diameter of the second medium substrate is 10.6 μm, the thickness of the second medium substrate is 0.5 μm, the metal bottom plate and the first medium substrate are cuboid, the length and the width of the metal bottom plate and the first medium substrate are both 10.6 μm, the thickness of the metal bottom plate is 0.3 μm, and the thickness of the first medium substrate is 0.8 μm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022538781.3U CN213520330U (en) | 2020-11-05 | 2020-11-05 | Wave absorber based on cascade graphite involute windmill blade structure |
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| CN202022538781.3U CN213520330U (en) | 2020-11-05 | 2020-11-05 | Wave absorber based on cascade graphite involute windmill blade structure |
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| CN213520330U true CN213520330U (en) | 2021-06-22 |
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| CN202022538781.3U Active CN213520330U (en) | 2020-11-05 | 2020-11-05 | Wave absorber based on cascade graphite involute windmill blade structure |
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