CN106839886A - The stealthy cape of Spark gap of irregular polygon structure - Google Patents

Abstract

The present invention provides a kind of stealthy cape of Spark gap of irregular polygon structure, the stealthy cape of Spark gap of the circular configuration is made up of the overcoat superposition of multiple irregular polygons, wherein, the overcoat of each irregular polygon sets multiple protective units from the inside to surface.Implement the present invention can it is fully reflective, absorb or attenuate electromagnetic pulse, the object for being protected will not be influenceed by electromagnetic pulse.

Description

Electromagnetic pulse protection stealthy cloak of irregular polygon structure

Technical Field

The invention relates to the field of electromagnetic protection, in particular to an electromagnetic pulse protection stealth cloak with an irregular polygonal structure.

Background

The electromagnetic pulse has the characteristics of wide action range, high peak field intensity, short rise time, wide frequency range, large killing power and the like, not only poses threat to the electronic information system which is continuously miniaturized and integrated in the present generation, but also causes damage to human bodies to different degrees and becomes a great hidden danger, and the military safety and social stability of all countries in the world are seriously influenced by the appearance and the increasing maturity of electromagnetic pulse weapons.

Based on different purposes, the existing protection methods can be divided into a circuit-level protection method for protecting a conductive electromagnetic pulse in a circuit and a space-level protection method for protecting an electromagnetic pulse field in a space. The circuit level protection devices mainly comprise amplitude limiters, filters and the like, the existing various circuit level protection devices are limited in protection bandwidth, insertion loss exists, and permanent damage such as increase of the insertion loss and deterioration of noise coefficients can also occur under the action of high-power electromagnetic pulses. The space level protection method mainly comprises a frequency selective surface, an energy selective surface, a metamaterial wave absorber and a novel material (such as nano material, graphene and plasma). The protection bandwidths of the energy selection surface and the energy selection surface are limited, the electromagnetic pulse cannot be guaranteed to be completely reflected, absorbed or attenuated, the protected object is influenced by the electromagnetic pulse more or less, electromagnetic wave leakage exists for a period of time before the protection function is completely started on the energy selection surface, and certain hidden danger exists.

Disclosure of Invention

The invention mainly aims to provide an electromagnetic pulse protection stealth cloak with an irregular polygonal structure, and aims to solve the technical problem of shielding electromagnetic pulses.

In order to achieve the purpose, the invention provides an electromagnetic pulse protection stealth cloak with an irregular polygon structure, wherein the electromagnetic pulse protection stealth cloak with a circular structure is formed by overlapping a plurality of irregular polygon protective layers, and a plurality of protective units are arranged on each irregular polygon protective layer from inside to outside;

each of the protective units has a dielectric constant and a magnetic permeability of mu, wherein,

wherein, X_i,Y_iThe vertex coordinates of the protective layer, τ is the scaling between the outer contour line and the inner contour line of the protective layer, and x and y are the coordinates of the center point of the protective unit.

Preferably, an annular ground plate is arranged at the bottom of the electromagnetic pulse protection stealth cloak with the irregular polygonal structure, a plurality of metalized pipes are arranged in the electromagnetic pulse protection stealth cloak with the irregular polygonal structure, the metalized pipes vertically penetrate through the annular protective layer and are connected with the annular ground plate, the metalized pipes are connected with the protection unit, and a plurality of metalized holes are formed in the metalized pipes;

the protection unit comprises a first inductor, a second inductor, a third inductor, a fourth inductor, a fifth inductor, a first capacitor, a second capacitor, a third capacitor and a fourth capacitor, wherein the first inductor, the second inductor, the third inductor and the fourth inductor are connected into a square structure through leads and are connected in series, one end of the fifth inductor is connected between the first inductor and the fourth inductor, the other end of the fifth inductor is connected between the second inductor and the third inductor, the first capacitor is connected with the leads connected in series between the first inductor and the second inductor, the second capacitor is connected with the leads connected in series between the first inductor and the fourth inductor, the third capacitor is connected with the leads connected in series between the second inductor and the third inductor, and the fourth capacitor is connected with the third inductor and the leads connected in series between the third inductor and the fourth inductorThe first capacitor, the second capacitor, the third capacitor and the fourth capacitor are respectively connected with a metalized hole, and the inductance values of the second inductor and the fourth inductor are 4L₁The inductance value of the fifth inductor is 2L₂The inductance values of the first inductor and the third inductor are both 4L₃And the capacitance values of the first capacitor, the second capacitor, the third capacitor and the fourth capacitor are all C/4. Wherein, C＝_zzd, d is the length of the guard unit, L₁、L₂And L₃All are inductance values, and C is a capacitance value.

Preferably, d is calculated as follows: d is lambda/3, lambda is C/f, C is the constant of the speed of light, and f is the maximum frequency corresponding to the frequency range in which the energy of the electromagnetic pulse is concentrated.

Preferably, the electromagnetic pulse frequency is a triangular electromagnetic pulse, a rectangular electromagnetic pulse, a sinusoidal electromagnetic pulse or a gaussian electromagnetic pulse.

By adopting the technical scheme, the invention has the following technical effects: the electromagnetic pulse protection stealth cloak with the irregular polygonal structure can completely reflect, absorb or attenuate electromagnetic pulses, and protected objects cannot be influenced by the electromagnetic pulses, so that the electromagnetic pulse damage to an electronic information system is effectively avoided, and the service life of the electronic information system is prolonged.

Drawings

FIG. 1 is a schematic structural view of a preferred embodiment of the electromagnetic pulse protection cloak with an irregular polygonal structure according to the present invention;

FIG. 2 is a perspective view of a preferred embodiment of the electromagnetic pulse protection cloak of the irregular polygonal configuration of the present invention;

FIG. 3 is a schematic cross-sectional view of a preferred embodiment of the electromagnetic pulse protection cloak of the irregular polygonal structure of the present invention;

FIG. 4 is a schematic diagram of a preferred embodiment of the shelter unit in the electromagnetic pulse protection cloak of the irregular polygonal structure of the present invention;

FIG. 5 is a schematic diagram of a preferred embodiment of the shelter unit in the electromagnetic pulse protection cloak of regular polygonal configuration of the present invention;

6-1-6-4 are schematic diagrams of four electromagnetic pulses in the simulation of the electromagnetic pulse protection cloak with an irregular polygonal structure according to the present invention;

7-1 to 7-3 are simulation diagrams of the electromagnetic pulse protection cloak with the irregular polygonal structure of the invention for triangular electromagnetic pulses;

8-1 to 8-3 are simulation diagrams of the electromagnetic pulse protection cloak with the irregular polygonal structure according to the present invention for rectangular electromagnetic pulses;

9-1 to 9-3 are simulation diagrams of the electromagnetic pulse protection cloak with the irregular polygonal structure of the present invention for sinusoidal electromagnetic pulses;

fig. 10-1 to 10-3 are simulation diagrams of the electromagnetic pulse protection cloak with the irregular polygonal structure according to the invention for gaussian electromagnetic pulses.

The objects, features and advantages of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

To further explain the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects of the present invention will be given with reference to the accompanying drawings and preferred embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 to 5, fig. 1 is a schematic structural diagram of a preferred embodiment of the electromagnetic pulse protection cloak with an irregular polygonal structure according to the present invention; FIG. 2 is a perspective view of a preferred embodiment of the electromagnetic pulse protection cloak of the irregular polygonal configuration of the present invention; FIG. 3 is a schematic cross-sectional view of a preferred embodiment of the electromagnetic pulse protection cloak of the irregular polygonal structure of the present invention; FIG. 4 is a schematic diagram of a preferred embodiment of the shelter unit in the electromagnetic pulse protection cloak of the irregular polygonal structure of the present invention; fig. 5 is a schematic diagram of a preferred embodiment of the protection unit in the electromagnetic pulse protection cloak with the irregular polygonal structure. The electromagnetic pulse protection stealth cloak 1 with the irregular polygonal structure is of a cylindrical structure formed by overlapping a plurality of annular protective layers 10. The ring-shaped protective layer 10 includes an outer contour line and an inner contour line, both the outer contour line and the inner contour line are formed by connecting a plurality of irregular straight lines (as shown in fig. 1, 7 lines are connected end to end), the outer contour line and the inner contour line are scaled according to a preset ratio (e.g., τ), and the solid ring-shaped protective layer 10 is disposed between the outer contour line and the inner contour line. Further, as shown in fig. 2 to 5, each of the ring-shaped protective layers 10 includes a plurality of protective units 100 therein. A plurality of protective units 100 are continuously disposed on each ring-shaped protective layer 10. The bottom of the electromagnetic pulse protection stealth cloak 1 with the irregular polygonal structure is provided with an annular ground plate 20 (the shape of which is the same as that of the protective layer 10), the electromagnetic pulse protection stealth cloak 1 with the irregular polygonal structure is internally provided with a plurality of metalized pipes 106, the metalized pipes 106 vertically penetrate through the annular protective layer 10 and are connected with the annular ground plate 20, the metalized pipes 106 are connected with the protection unit 100, and the metalized pipes 106 are provided with a plurality of metalized holes 110. In other embodiments, the grounding plate 20 and the metalized tube 107 may be omitted. The guard unit 100 has a cubic structure. As shown in fig. 4, the protective layer 10 is divided into small squares with size d (i.e. d1 in fig. 4), and the division ensures that most areas can be divided into squares as much as possible, and the positions that cannot be divided into squares are replaced by square approximations, and each square represents one protective unit 100.

Each shield unit 100 has a dielectric constant of μ and a magnetic permeability of μ.

Wherein,

wherein, X_i,Y_iIn terms of coordinates of vertices of the shielding layer 10 (e.g., coordinates of points P1, P2, P3, P4, P5, P6, and P7 in fig. 5), τ is a scaling ratio between the outer contour line and the inner contour line of the shielding layer 10 (τ is smaller than 1, and τ is a ratio of a longest distance from the center O to the inner contour line to a longest distance from the center O to the outer contour line), and x and y are coordinates of a center point of the shielding unit 100.

That is, if each shielding unit 100 is made of a material having a dielectric constant and a magnetic permeability μ calculated as described above, the shielding of the electromagnetic pulse can be completed. It should be noted that the dielectric constant and the magnetic permeability μ of the shielding element 100 at different positions on each ring-shaped shielding layer 10 are not the same. The plurality of protection units 100 made of a plurality of different materials can form protection against electromagnetic pulses, that is, a propagation path for guiding electromagnetic waves based on a conformal transformation theory and an optical transformation theory (in 2006, u.leonhardt and j.b. pendry et al, respectively, propose the conformal transformation theory and the optical transformation theory in journal of science at the same time, and are used for guiding the propagation path for electromagnetic waves), so as to protect against electromagnetic pulses. Since the conformal transformation theory and the optical transformation theory are prior art, they are not described herein. The material can be any other suitable material such as nano-material, graphene material, plasma material and the like with different specifications.

Further, it is well known that the dielectric constant and permeability of a material can be equivalently modeled in a distributed L-C circuit network. That is, an equivalent simulation can be performed using an electric circuit for the material having the dielectric constant and the magnetic permeability μ. Each guard cell (i.e., a small square in fig. 4) is equivalent to an LC circuit, and the circuit is soldered to the substrate of the guard layer. Specifically, each shielding unit 100 uses four inductors and one capacitor to obtain a material with equivalent dielectric constant and magnetic permeability μ. The protective layer 10 and the protective layer 10 are connected by a metalized pipe 106. Specifically, as shown in fig. 3 and 4, the protection unit 100 includes a first inductor 101, a second inductor 102, a third inductor 103, a fourth inductor 104, a fifth inductor 105, a first capacitor 106, a second capacitor 107, a third capacitor 108, and a fourth capacitor 109, wherein the first inductor 101, the second inductor 102, the third inductor 103, and the fourth inductor 104 are connected in series in a square structure by conductive wires, one end of the fifth inductor 105 is connected between the first inductor 101 and the fourth inductor 104, the other end of the fifth inductor 105 is connected between the second inductor 102 and the third inductor 103, the first capacitor 106 is connected to a conductive wire connected in series between the first inductor 101 and the second inductor 102, the second capacitor 107 is connected to a conductive wire connected in series between the first inductor 101 and the fourth inductor 104, the third capacitor 108 is connected to a conductive wire connected in series between the second inductor 102 and the third inductor 103, the fourth capacitor 109 is connected to a conducting wire connected in series between the third inductor 103 and the fourth inductor 104, and the first capacitorThe capacitor 106, the second capacitor 107, the third capacitor 108 and the fourth capacitor 109 are each connected to a metallization hole 110. Wherein, the inductance values of the second inductor 102 and the fourth inductor 104 are both 4L₁(see fig. 4), the inductance of the fifth inductor 105 is 2L₂(see fig. 4), the inductance values of the first inductor 101 and the third inductor 103 are both 4L₃The capacitance values of the first capacitor 106, the second capacitor 107, the third capacitor 108 and the fourth capacitor 109 are all C/4. Wherein, C＝_zzd, d is the length of the guard unit 100, L₁、L₂And L₃All are inductance values, and C is a capacitance value. It should be noted that adjacent guard units 100 in the same ring-shaped guard layer 10 are connected to each other (for example, in the connection manner of four guard units 100 in fig. 4, the guard unit 100 at the upper left corner is connected to the guard unit 100 at the upper right corner and the guard unit at the lower left corner).

Further, in this embodiment, d is calculated as follows: d is lambda/3, lambda is C/f, C is the constant of the speed of light, and f is the maximum frequency corresponding to the frequency range in which the energy of the electromagnetic pulse is concentrated. (the frequency range of the electromagnetic pulse is from positive infinity to negative infinity, but the energy of the electromagnetic pulse is mainly concentrated in a certain frequency range, and f is the maximum frequency corresponding to the frequency range in which the energy of the electromagnetic pulse is concentrated). For a square pulse with a duration of 1 ns, the energy of the square pulse is mainly concentrated at 0-10GHz, according to λ C/f 3 10⁸/10*10⁹3 cm, the size of each protection unit 100 is less than or equal to d λ/3 m/3 1 cm.

In order to verify the protection performance of the electromagnetic pulse protection stealth cloak 1 with the irregular polygonal structure, four electromagnetic pulses are adopted to verify the protection performance of the electromagnetic pulse protection stealth cloak 1 with the irregular polygonal structure.

Wherein, fig. 7-1 to 7-3 are simulation diagrams of the electromagnetic pulse protection cloak with the irregular polygonal structure according to the present invention for triangular electromagnetic pulses, and as can be seen from fig. 7-1 to 7-3, when a triangular electromagnetic pulse passes through the electromagnetic pulse protection cloak 1 with the irregular polygonal structure, the inner circle of the electromagnetic pulse protection cloak 1 does not pass through the triangular pulse, wherein, referring to fig. 6-1, the parameter is τ is 0.5, coordinates of seven vertexes are P1(1,0), P2(0.5,0.8), P3(0.2,0.6), P4(-0.1,0.9), P5(-1,0.5), P6(-0.1, -0.5), P7(0.5, -0.4), a horizontal axis in a graph of the triangular electromagnetic pulse represents time, ns is unit, a range is 0-35ns, a vertical axis represents current, the unit is mA.

Fig. 8-1 to 8-3 are simulation diagrams of the electromagnetic pulse protection cloak with the irregular polygonal structure according to the present invention with respect to rectangular electromagnetic pulses, and as can be seen from fig. 8-1 to 8-3, when the rectangular electromagnetic pulse passes through the electromagnetic pulse protection cloak 1 with the irregular polygonal structure, the inner circle of the electromagnetic pulse cloak 1 does not pass through the rectangular pulse, referring to fig. 6-2, the parameter is τ is 0.5, coordinates of seven vertices are P1(1,0), P2(0.5,0.8), P3(0.2,0.6), P4(-0.1,0.9), P5(-1,0.5), P6(-0.1, -0.5), and P7(0.5, -0.4), and in the graph of the rectangular electromagnetic pulse, the horizontal axis represents time in ns, the range is 0-35ns, and the vertical axis represents current in mA.

Fig. 9-1 to 9-3 are simulation diagrams of the electromagnetic pulse protection cloak with the irregular polygonal structure according to the present invention with respect to sinusoidal electromagnetic pulses, and as can be seen from fig. 9-1 to 9-3, when the sinusoidal electromagnetic pulses pass through the electromagnetic pulse protection cloak 1 with the irregular polygonal structure, the inner circle of the electromagnetic pulse protection cloak 1 does not pass through the sinusoidal pulses, referring to fig. 6 to 3, the parameter is τ is 0.5, coordinates of seven vertexes are P1(1,0), P2(0.5,0.8), P3(0.2,0.6), P4(-0.1,0.9), P5(-1,0.5), P6(-0.1, -0.5), and P7(0.5, -0.4), and in the graph of the sinusoidal electromagnetic pulse, the horizontal axis represents time in ns, the range is 0 to 35ns, and the vertical axis represents current in mA.

Fig. 10-1 to 10-3 are simulation diagrams of the electromagnetic pulse protection cloak with the irregular polygonal structure according to the present invention with respect to gaussian electromagnetic pulses, and as can be seen from fig. 10-1 to 10-3, when the gaussian electromagnetic pulses pass through the electromagnetic pulse protection cloak 1 with the irregular polygonal structure, the inner circle of the electromagnetic pulse cloak 1 does not pass through the gaussian pulse, referring to fig. 6 to 4, the parameter is τ is 0.5, coordinates of seven vertexes are P1(1,0), P2(0.5,0.8), P3(0.2,0.6), P4(-0.1,0.9), P5(-1,0.5), P6(-0.1, -0.5), P7(0.5, -0.4), and in the graph of the gaussian electromagnetic pulse, the horizontal axis represents time in ns, the range is 0 to 35ns, and the vertical axis represents current in mA.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes performed by the present invention in the specification and drawings, or applied to other related technical fields, are also included in the scope of the present invention.

Claims (4)

1. The electromagnetic pulse protection stealth cloak with the irregular polygonal structure is characterized in that the electromagnetic pulse protection stealth cloak with the circular structure is formed by overlapping a plurality of irregular polygonal protective layers, wherein a plurality of protection units are arranged on each irregular polygonal protective layer from inside to outside;

each of the protective units has a dielectric constant and a magnetic permeability of mu, wherein,

$\mathrm{\ϵ}=\left[\begin{array}{ccc}{\mathrm{\ϵ}}_{xx}& {\mathrm{\ϵ}}_{xy}& 0\\ {\mathrm{\ϵ}}_{yx}& {\mathrm{\ϵ}}_{yy}& 0\\ 0& 0& {\mathrm{\ϵ}}_{zz}\end{array}\right],\mathrm{\μ}=\left[\begin{array}{ccc}{\mathrm{\μ}}_{xx}& {\mathrm{\μ}}_{xy}& 0\\ {\mathrm{\μ}}_{yx}& {\mathrm{\μ}}_{yy}& 0\\ 0& 0& {\mathrm{\μ}}_{zz}\end{array}\right],$

${\mathrm{\ϵ}}_{xx}={\mathrm{\μ}}_{xx}=\frac{\[{(1-{\mathrm{\τU}}_i)}^2{x}^{\′2}+{\mathrm{\τ}}^2{U}_i^2{V}_i^2{x}^2+2{\mathrm{\τU}}_i{V}_{i}xy+y^2\]}{(x^2+y^2)(1-{\mathrm{\τU}}_i)},$

${\mathrm{\ϵ}}_{xy}={\mathrm{\ϵ}}_{yx}={\mathrm{\μ}}_{xy}={\mathrm{\μ}}_{yx}=\frac{\[-{\mathrm{\τU}}_i(2-{\mathrm{\τU}}_i)xy+{\mathrm{\τ}}^2{U}_i^2{V}_i^{2}xy-{\mathrm{\τU}}_i{V}_i(x^2+y^2)\]}{(x^2+y^2)(1-{\mathrm{\τU}}_i)},$

${\mathrm{\ϵ}}_{yy}={\mathrm{\μ}}_{yy}=\frac{\[{(1-{\mathrm{\τU}}_i)}^2{y}^2+{\mathrm{\τ}}^2{U}_i^2{V}_i^2{y}^2-2{\mathrm{\τU}}_i{V}_{i}xy+x^2\]}{(x^2+y^2)(1-{\mathrm{\τU}}_i)},$

$U_i=\frac{(Y_i{X}_{i+1}-X_i{Y}_{i+1})}{y(X_{i+1}-X_i)-x(Y_{i+1}-Y_i)},V_i=\frac{x(X_{i+1}-X_i)+y(Y_{i+1}-Y_i)}{y(X_{i+1}-X_i)-x(Y_{i+1}-Y_i)}$

wherein, X_i,Y_iThe vertex coordinates of the protective layer, τ is the scaling between the outer contour line and the inner contour line of the protective layer, and x and y are the coordinates of the center point of the protective unit.

2. The electromagnetic pulse protection stealth cloak with the irregular polygonal structure as claimed in claim 1, wherein an annular grounding plate is disposed at the bottom of the electromagnetic pulse protection stealth cloak with the irregular polygonal structure, a plurality of metalized pipes are disposed in the electromagnetic pulse protection stealth cloak with the irregular polygonal structure, the metalized pipes vertically penetrate through the annular protective layer and are connected with the annular grounding plate, the metalized pipes are connected with the protection unit, and a plurality of metalized holes are disposed on the metalized pipes;

the protection unit comprises a first inductor, a second inductor, a third inductor, a fourth inductor, a fifth inductor, a first capacitor, a second capacitor, a third capacitor and a fourth capacitor, wherein the first inductor, the second inductor, the third inductor and the fourth inductor are connected in series through a conducting wire in a square structure, one end of the fifth inductor is connected between the first inductor and the fourth inductor, the other end of the fifth inductor is connected between the second inductor and the third inductor, the first capacitor is connected with the conducting wire connected in series between the first inductor and the second inductor, the second capacitor is connected with the conducting wire connected in series between the first inductor and the fourth inductor, the third capacitor is connected with the conducting wire connected in series between the second inductor and the third inductor, the fourth capacitor is connected with the conducting wire connected in series between the third inductor and the fourth inductor, and the first capacitor, the second capacitor, the third capacitor and the fourth capacitor are respectively connected with a metallized hole, the inductance values of the second inductor and the fourth inductor are both 4L₁The inductance value of the fifth inductor is 2L₂The inductance values of the first inductor and the third inductor are both 4L₃And the capacitance values of the first capacitor, the second capacitor, the third capacitor and the fourth capacitor are all C/4. Wherein, C＝_zzd, d is the length of the guard unit, L₁、L₂And L₃All are inductance values, and C is a capacitance value.

3. The electromagnetic pulse protection cloak with an irregular polygonal structure as claimed in claim 2, wherein d is calculated as follows: d is lambda/3, lambda is C/f, C is the constant of the speed of light, and f is the maximum frequency corresponding to the frequency range in which the energy of the electromagnetic pulse is concentrated.

4. The electromagnetic pulse protection cloak with an irregular polygonal structure according to claim 3, wherein the electromagnetic pulse frequency is a triangular electromagnetic pulse, a rectangular electromagnetic pulse, a sinusoidal electromagnetic pulse or a Gaussian electromagnetic pulse.