CN210156554U - Electromagnetic wave polarization conversion super surface based on q-like structure - Google Patents
Electromagnetic wave polarization conversion super surface based on q-like structure Download PDFInfo
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- CN210156554U CN210156554U CN201920676405.5U CN201920676405U CN210156554U CN 210156554 U CN210156554 U CN 210156554U CN 201920676405 U CN201920676405 U CN 201920676405U CN 210156554 U CN210156554 U CN 210156554U
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Abstract
The utility model relates to an electromagnetic wave polarization conversion super surface based on class "q" type structure is formed by several unit structure periodic arrangement in the coplanar. Each unit structure is composed of three layers, namely a surface layer structure, a middle medium layer and a bottom layer structure. The bottom layer structure and the middle medium layer structure are square structures with the same size and different thicknesses. The surface layer is of a q-shaped structure and comprises a concentric ring, three gaps with the same size and shape are arranged on the ring, a square patch is filled in the ring, and the shape of the cut gap is not completely the same as that of the added square patch. The rectangular patch is superposed on the right side of the circular ring to form a q-shaped structure. The utility model discloses an electromagnetic wave polarization conversion surperficial, electromagnetic response is unique, and electromagnetic property is abundant, can carry out high-efficient ground polarization regulation and control to the linear polarization electromagnetic wave of vertical incidence in certain frequency range.
Description
Technical Field
The invention belongs to the technical field of artificial electromagnetic super-surface design, and particularly relates to the field of design of an electromagnetic wave super-surface polarization regulator.
Background
Polarization is one of the fundamental properties of electromagnetic waves, and many applications of electromagnetic waves cannot be separated from the polarization. Meanwhile, polarization of electromagnetic waves plays an important role in various high-tech fields such as communication, radar, navigation, and the like. The artificial electromagnetic super surface has more excellent performance than the existing electromagnetic materials in the nature, and has the characteristics of miniaturization and integration compared with the traditional materials, so the artificial electromagnetic super surface has extremely important significance for realizing the regulation and control of the polarization of electromagnetic waves, and the required macroscopic electromagnetic property can be obtained through proper design. Based on the above characteristics, the art has gained extensive attention and research from related technicians.
Disclosure of Invention
The electromagnetic wave polarization regulation and control device based on the traditional material has the defects of large size and difficulty in integration, and in order to change the current situation, the invention realizes the design of an electromagnetic wave polarization conversion super-surface based on a similar q-shaped structure, and performs combined design on common metals and media in the nature to obtain the super-surface capable of effectively regulating and controlling the polarization of electromagnetic waves, and the super-surface can realize the efficient polarization regulation and control of vertical incidence linear polarization electromagnetic waves within a certain frequency band.
The technical route of the invention is as follows: an electromagnetic wave polarization conversion super surface based on a q-shaped structure is formed by periodically arranging polarization unit structures in the same plane, and when the unit structures are periodically extended, the number of transverse and longitudinal periodic unit structures is equal.
Each unit structure is composed of a surface layer, a middle layer and a bottom layer, the three layers are adhered together, and no gap exists between every two adjacent structures.
The center of the three-layer structure is located on the same vertical line, the circle center of the concentric ring part of the surface layer structure coincides with the center of the three-layer structure, three notches in the ring are respectively obtained by horizontally placing and vertically placing rectangles formed by dotted lines, the three notches are identical in size and shape, a square patch is filled in the ring, a rectangular patch is stacked on the right side, and the short edge of the upper side of the square patch and the long edge of the lower side of the rectangle formed by the dotted lines placed horizontally are located on the same horizontal line.
The circle center of the ring is superposed with the center of the horizontally placed rectangle formed by the dotted lines, and the circle center of the ring is positioned at the center of the short side of the vertically placed rectangle formed by the dotted lines.
The shape of the cut notch on the circular ring is not completely the same as that of the square structure filled in the notch, and the notch is of a structure with three sides being straight lines and one side being an arc line.
And (3) establishing a rectangular coordinate system by taking the circle center of the concentric ring as an origin, the vertical direction as an x axis and the horizontal direction as a y axis, wherein the position of the center of the square patch structure filled in the ring is (0-1.15 mm).
The surface layer of the unit structure can be made of gold, silver, copper, aluminum and other materials, and copper is preferably selected in application, the thickness is 0.035mm, and the conductivity is 5.8 multiplied by 107S/m, the overall structural shape of the surface layer is approximately q-shaped.
The middle layer of the unit structure is a dielectric layer, the thickness g of the dielectric material is 0.8-1.2 mm, the dielectric constant of the material is 2-3, and the loss is 0.0001-0.01.
The bottom layer of the unit structure can be made of gold, silver, copper, aluminum and other materials, and copper is preferably selected in application, the thickness of the copper is 0.035mm, and the conductivity of the copper is 5.8 multiplied by 107S/m，。
The variation range of the period P of the polarized structure unit is 4-16 mm, and the variation range of other corresponding structure parameters is as follows:
1.2mm≤ a ≤1.75mm，1.8mm≤ b ≤2.75mm，0.8mm≤ c ≤1.2mm，
2.5mm≤ d ≤3.2mm，0.4mm≤ e ≤0.6mm，3.6mm≤ f ≤5.5mm。
the invention has the following characteristics: 1. in view of the limitation of the electromagnetic property of the existing materials in the nature, the invention carries out combined design on the metal and the medium, fully excavates the performance of the metal and the medium, realizes the high-efficiency polarization conversion of the electromagnetic wave in a wider frequency band, and has the characteristics of higher efficiency and more flexibility compared with the traditional electromagnetic wave polarization regulator.
2. Compared with the traditional material, the invention has the advantages of smaller structure, easy integration, easy processing and cheaper required material.
Drawings
FIG. 1 is a schematic front view of a polarized unit structure of an electromagnetic wave polarization conversion super-surface based on a "q" -like structure according to the present invention.
FIG. 2 is an overall schematic diagram of a polarization unit structure of the electromagnetic wave polarization conversion super-surface based on a structure similar to a "q" type according to the present invention.
FIG. 3 shows cross-polarization reflectivities at corresponding frequencies according to an embodiment of the present invention.
Fig. 4 is a schematic front view of a polarization unit structure according to an embodiment of the present invention.
FIG. 5 shows cross-polarization reflectivities at corresponding frequencies according to a second embodiment of the present invention.
FIG. 6 shows cross-polarization reflectivities at corresponding frequencies according to a third embodiment of the present invention.
Detailed Description
The present invention will be further described and illustrated with reference to the accompanying drawings of embodiments of the present invention, wherein the following embodiments are only a part of the embodiments of the present invention, and not all of the embodiments, and therefore, based on the embodiments of the present invention, other achievements obtained by those skilled in the relevant art without innovative modifications still belong to the protection scope of the present invention.
As shown in fig. 1, the electromagnetic wave polarization conversion super-surface based on the "q" -like structure proposed by the present invention is formed by periodically arranging polarization unit structures in the same plane, and when the unit structures are periodically extended, the number of the transverse and longitudinal periodic unit structures is equal.
The periodic unit structure is composed of a surface layer, a middle layer and a bottom layer of three-layer structures, the three-layer structures are adhered together, no gap exists in the middle of each adjacent structure, the centers of the three-layer structures are located on the same vertical line, the circle center of the metal concentric ring part of the surface layer coincides with the center of the three-layer structure, three gaps in the ring are respectively obtained by horizontally placing and vertically placing rectangles formed by dotted lines, the sizes and the shapes of the three gaps are the same, meanwhile, a square metal patch is filled in the ring, a rectangular metal patch is superposed on the right side, and the short edge above the rectangular metal patch and the long edge below the rectangle formed by the dotted lines placed horizontally are on the same horizontal line.
The circle center of the concentric ring is superposed with the center of the horizontally placed rectangle formed by the dotted lines, and the circle center of the concentric ring is positioned at the center of the short side of the vertically placed rectangle formed by the dotted lines. The shape of a gap formed by cutting a rectangle formed by dotted lines on a circular ring is not completely the same as that of a square patch filled in the gap, and the gap has a structure that three sides are straight lines and one side is arc-shaped. And (3) establishing a rectangular coordinate system by taking the circle center of the concentric ring as an origin, the vertical direction as an x axis and the horizontal direction as a y axis, wherein the position of the center of the square patch structure filled in the ring is (0-1.15 mm).
As shown in FIG. 1 and FIG. 2, the middle layer of the unit structure is a dielectric layer, the thickness g of the dielectric material is 0.8-1.2 mm, the dielectric constant of the material is 2-3, and the loss is 0.0001-0.01. The surface layer and the bottom layer are both copper foils.
The thickness of the surface layer and the bottom layer copper foils in the three-layer structure is 0.035mm, and the conductivity is 5.8 multiplied by 107S/m。
The technical solution of the present invention will be further explained with reference to specific examples.
Detailed description of the preferred embodiment
In conjunction with the schematic diagram shown in fig. 1, we used software to perform simulation calculations, where we set the interlayer dielectric to use Taconic TLY-3, which has a dielectric constant of 2.33, a permeability of 1.0, and a loss of 0.0012. The surface layer and the bottom layer are both copper foils with the conductivity of 5.8 multiplied by 107And (5) S/m. The geometrical parameters of one polarized unit structure of the super surface are a =1.55mm, b =2.00mm, c =0.95mm, d =3.00mm, e =0.50mm, f =4.00mm, g =1.00mm, and P =8.00 mm. Cross-polarized reflectance is defined as Ryx(ω)=|S1y,1x(ω)|2In which S is1y,1xAnd (omega) is a corresponding S parameter, and the higher the cross polarization reflectivity is, the better the polarization conversion effect of the super-surface is. Thus, as can be seen from the cross-polarized reflectance image shown in FIG. 3, the present invention proposesThe electromagnetic wave polarization conversion super-surface based on the q-shaped structure can achieve the effect of deflecting the polarization surface of the vertically incident linearly polarized wave by 90 degrees within the frequency range of 14.51-16.16 GHz, the cross polarization reflectivity in the frequency band is larger than 90%, and the cross polarization reflectivity at 15.74GHz reaches the maximum value of 96.5%, so that the invention can play a good role in polarization regulation and control in application and practice.
Detailed description of the invention
A square copper metal patch is arranged in a surface layer metal concentric ring of the electromagnetic wave polarization conversion super-surface based on a q-shaped structure, and has certain influence on the cross polarization reflectivity. In the first embodiment, a copper square metal patch is added to the concentric rings, the size and shape of the concentric rings are the same as those of the original square metal patch, the center position is (-0.75 mm ), and the schematic view of the structure of the polarization unit is shown in fig. 4. The cross polarization reflectivity of the electromagnetic wave polarization conversion super-surface is shown in fig. 5, the cross polarization reflectivity of the electromagnetic wave polarization conversion super-surface is larger than 90% for the perpendicular incidence linear polarization electromagnetic wave between 14.53 and 16.14GHz, and the maximum value of the cross polarization reflectivity is 96.4% at 14.92 GHz.
Detailed description of the preferred embodiment
The cross polarization reflectivity of the invention to electromagnetic waves can be greatly influenced by changing the material of the middle dielectric layer, and the middle dielectric layer can be changed into TLX or TLY and other series materials. In this embodiment, Taconic TLX-9 material with dielectric constant of 2.5, magnetic permeability of 1.0, loss of 0.0019 is used as the middle dielectric layer, and the other geometrical parameters are exactly the same as those in the first embodiment. As can be seen from FIG. 6, the embodiment also has a good polarization conversion effect, the cross polarization reflectivity of the invention to the perpendicular incident linear polarization electromagnetic wave is more than 90% between 14.10 GHz and 15.69GHz, and the maximum value of the cross polarization reflectivity is 95.3% at 14.41 GHz.
Claims (8)
1. The utility model provides an electromagnetic wave polarization conversion super surface based on class "q" type structure, is formed by polarization unit structure is periodic arrangement in the coplanar, and polarization unit structure cycle is P, its characterized in that: each polarization unit structure is composed of a surface layer, a middle layer and a bottom layer, wherein the surface layer is of a q-shaped structure, the three layers are adhered together, no gap exists between every two adjacent polarization unit structures, and when the polarization unit structures are extended periodically, the number of the transverse periodic polarization unit structures is equal to that of the longitudinal periodic polarization unit structures.
2. The electromagnetic wave polarization conversion super-surface based on the structure like the q-type as claimed in claim 1, wherein: the center of three layer construction is located same vertical line, the centre of a circle of the concentric ring in the surface layer structure and three layer construction's center coincidence, there are three breach on the concentric ring, this three breach is placed and the rectangle cutting of vertical placing by the level that the dotted line constitutes respectively obtains, and three breach size shape is the same, has filled a square paster in concentric ring inside simultaneously, the rectangle paster is superposed on the right side, the rectangular below long limit that its upside minor face and the dotted line that the level was placed constituted is on same horizontal line.
3. The electromagnetic wave polarization conversion super-surface based on the structure like the q-type as claimed in claim 2, wherein: the circle center of the concentric ring is superposed with the center of the horizontally placed rectangle formed by the dotted lines, and the circle center of the concentric ring is positioned at the center of the short side of the vertically placed rectangle formed by the dotted lines.
4. The electromagnetic wave polarization conversion super-surface based on the structure like the q-type as claimed in claim 2, wherein: the shape of the cut gap on the concentric ring is not completely the same as that of the square patch filled in the gap, and the gap has a structure that three sides are straight lines and one side is an arc line.
5. The electromagnetic wave polarization conversion super-surface based on the structure like the q-type as claimed in claim 2, wherein: and (3) establishing a rectangular coordinate system by taking the circle center of the concentric ring as an origin, the vertical direction as an x axis and the horizontal direction as a y axis, wherein the central position of the square patch filled in the ring is (0 mm, -1.15 mm).
6. The electromagnetic wave polarization conversion super-surface based on the structure like the q-type as claimed in claim 1, wherein: the surface layer of the polarization unit structure can be made of gold, silver, copper, aluminum and other materials, the thickness of the polarization unit structure is 0.035mm, and the overall structure is approximately in a q shape.
7. The electromagnetic wave polarization conversion super-surface based on the structure like the q-type as claimed in claim 1, wherein: the middle layer of the polarization unit structure is a dielectric layer, the thickness g of a dielectric material is 0.8-1.2 mm, the dielectric constant of the material is 2-3, and the loss tangent value is 0.0001-0.01; the bottom layer of the polarization unit structure can be made of gold, silver, copper, aluminum and the like, and the thickness of the bottom layer is 0.035 mm.
8. The electromagnetic wave polarization conversion super-surface based on the structure like the q-type as claimed in claim 1, wherein: the variation range of the polarization unit structure period P is 4-16 mm, and the variation ranges of other structure parameters are as follows:
1.2mm≤ a ≤1.75mm，1.8mm≤ b ≤2.75mm，0.8mm≤ c ≤1.2mm，
2.5mm≤ d ≤3.2mm，0.4mm≤ e ≤0.6mm，3.6mm≤ f ≤5.5mm。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920676405.5U CN210156554U (en) | 2019-05-13 | 2019-05-13 | Electromagnetic wave polarization conversion super surface based on q-like structure |
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| CN201920676405.5U CN210156554U (en) | 2019-05-13 | 2019-05-13 | Electromagnetic wave polarization conversion super surface based on q-like structure |
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| CN210156554U true CN210156554U (en) | 2020-03-17 |
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| CN201920676405.5U Expired - Fee Related CN210156554U (en) | 2019-05-13 | 2019-05-13 | Electromagnetic wave polarization conversion super surface based on q-like structure |
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Granted publication date: 20200317 Termination date: 20210513 |