WO2018126601A1

WO2018126601A1 - Electromagnetic pulse protection invisibility cloak having curved structure

Info

Publication number: WO2018126601A1
Application number: PCT/CN2017/085955
Authority: WO
Inventors: 王羚; 邓力; 李书芳; 张贯京; 葛新科; 高伟明; 张红治
Original assignee: 深圳市景程信息科技有限公司
Priority date: 2017-01-07
Filing date: 2017-05-25
Publication date: 2018-07-12
Also published as: CN107041577A; CN107041577B

Abstract

An electromagnetic pulse protection invisibility cloak (1) having a curved structure. The invisibility cloak consists of multiple stacked curved protection layers (10). Each of the curved protection layers (10) has multiple protection units (100) arranged from an inner side to an outer side. The electromagnetic pulse protection invisibility cloak (1) of the present invention can fully reflect, absorb, or attenuate electromagnetic pulses, such that a protected object is not influenced by the electromagnetic pulses.

Description

Electromagnetic pulse protection stealth cloak with curved shape structure

[0001] The present invention relates to the field of electromagnetic protection, and in particular, to an electromagnetic pulse protection stealth hood of a curved shape structure.

Background technique

[0002] Electromagnetic pulses have a wide range of effects, high peak field strength, short rise time, wide frequency range, and high lethality. They not only pose a threat to the current miniaturization and integration of electronic information systems, but also The human body has caused various degrees of damage, which has become a great hidden danger. The emergence and maturity of electromagnetic pulse weapons has seriously affected the military security and social stability of countries all over the world.

[0003] Based on different uses, existing protection methods can be divided into circuit level protection methods and space level protection methods, the former for conducting electromagnetic pulses in the protection circuit and the latter for protecting the electromagnetic pulse field in the space. Circuit-level protection devices are mainly limited to amplitudes, filters, etc. Existing circuit-level protection devices are limited in protection bandwidth, there is insertion loss and insertion loss increases and noise occurs under the action of high-power electromagnetic pulses. Permanent damage such as deterioration of the coefficient. Space-level protection methods mainly include frequency selective surfaces, energy selective surfaces, metamaterial absorbers, and new materials (such as nanomaterials, graphene, plasma). Their protective bandwidth is limited, and there is no guarantee that the total reflection absorbs or attenuates the electromagnetic pulse. The protected object is more or less affected by the electromagnetic pulse, and the energy selective surface still exists before the protection function is fully activated. There is a hidden danger in the leakage of electromagnetic waves during a period of time.

technical problem

[0004] The main object of the present invention is to provide an electromagnetic pulse protection stealth cloak with a curved shape structure, which aims to solve the technical problem of shielding electromagnetic pulses.

Problem solution

Technical solution

[0005] In order to achieve the above object, the present invention provides an electromagnetic pulse protection stealth cloak with a curved shape structure, and the electromagnetic pulse protection stealth cloak of the circular structure is composed of a plurality of curved shape protective layers, wherein each The curved protective layer is provided with a plurality of protection units from the inside to the outside; [0006] Each of the protection units has a dielectric constant of ε and a magnetic permeability of μ, wherein _:

[0007]

[0008]

[0011] wherein, Θ is the angle between the line connecting the center point of the protection unit 100 and the center O in the protective layer 10 and the positive direction of the x-axis

_r is the distance from the center point of the protective unit loo in the protective layer 10 to the center 0 of the protective layer 1, R (e) Fourier sequence curve function, d is the length of the guard unit, and X and y are the center point coordinates of each guard unit , τ is the scaling between the outer curve and the inner curve of the protective layer.

[0012] Preferably, the bottom of the electromagnetic pulse protection stealth cloak of the curved shape structure is provided with an annular ground plate, and a plurality of metallized tubes are disposed in the electromagnetic pulse protection stealth cloak of the curved shape structure, the metallized tube Vertically passing through the annular protective layer and connected to the annular ground plate, the metallized tube and The protection unit is connected, and the metallized tube is provided with a plurality of metallized holes;

The protection unit includes 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 and the second inductor The third inductor and the fourth inductor are connected in series by a wire into a square structure, one end of the fifth inductor is connected between the first inductor and the fourth inductor, and the other end of the fifth inductor is at the second inductor and the third inductor The first capacitor is connected to the wire connected in series between the first inductor and the second inductor, the second capacitor is connected to the wire connected in series between the first inductor and the fourth inductor, and the third capacitor is connected a wire connected in series between the second inductor and the third inductor, the fourth capacitor being connected to a wire connected in series between the third inductor and the fourth inductor, the first capacitor, the second capacitor, the third capacitor, and the fourth Each of the capacitors is connected to a metallized hole, and the inductance values of the second inductor and the fourth inductor are both 4L _{1 ;} the inductance of the fifth inductor is 2L ₂ , and the inductance values of the first inductor and the third inductor are both 4L ₃ . First electricity , A second capacitor, the capacitance value of the third capacitor and the fourth capacitor are C / 4. among them,

= f .

, d is the length of the protection unit, L , , 1^ ₂ and 1^ ₃ are the inductance values, and C is the capacitance value.

[0014] Preferably, d is calculated as follows: (1=λ/3, X=C/f, C is a constant speed of light, and f is the maximum frequency corresponding to the frequency range in the electromagnetic pulse energy set.

[0015] Preferably, the electromagnetic pulse frequency is a triangular electromagnetic pulse, a rectangular electromagnetic pulse, a sinusoidal electromagnetic pulse or a Gaussian electromagnetic pulse. Advantageous effects of the invention

Beneficial effect

[0016] The present invention adopts the above technical solution, and brings the technical effects as follows: The electromagnetic pulse protection stealth cloak of the curved shape structure of the invention can completely reflect, absorb or attenuate the electromagnetic pulse, and the protected object is not subjected to the electromagnetic pulse. The impact of the electromagnetic pulse damage of the electronic information system is effectively avoided, and the life of the electronic information system is prolonged.

Brief description of the drawing

DRAWINGS

1 is a schematic structural view of a preferred embodiment of an electromagnetic pulse protection stealth cloak of a curved shape structure of the present invention;

2 is a perspective view of a preferred embodiment of the electromagnetic pulse protection stealth cloak of the curved shape structure of the present invention; [0019] FIG. 3 is a cross-sectional view of a preferred embodiment of the electromagnetic pulse protection stealth cloak of the curved shape structure of the present invention; ;

4 is a schematic view of a preferred embodiment of a guard unit in an electromagnetic pulse protection stealth cloak of a curved shape structure of the present invention; [0020] FIG.

5 is a schematic view of a preferred embodiment of a guard unit in an electromagnetic pulse protection invisibility cloak of a regular polygonal structure of the present invention; [0021] FIG.

[0022] FIG. 6-1 to FIG. 6-4 are schematic diagrams of four electromagnetic pulses simulated by the electromagnetic pulse protection invisible cloak of a curved shape structure according to the present invention;

[0023] FIG. 7-1 to FIG. 7-3 are schematic diagrams of simulations of a triangular electromagnetic pulse for an electromagnetic pulse protection stealth cloak of a curved shape structure of the present invention;

8-1 to 8-3 are schematic diagrams showing simulations of a rectangular electromagnetic pulse for an electromagnetic pulse protection stealth cloak of a curved shape structure of the present invention;

9-1 to 9-3 are schematic diagrams showing simulations of a sinusoidal electromagnetic pulse of an electromagnetic pulse protection invisible cloak of a curved shape structure of the present invention;

10-1 to 10-3 are schematic diagrams showing simulations of Gaussian electromagnetic pulses of the electromagnetic pulse protection stealth cloak of the curved shape structure of the present invention.

[0027] The objects, features, and advantages of the present invention will be further described in conjunction with the embodiments. BEST MODE FOR CARRYING OUT THE INVENTION

BEST MODE FOR CARRYING OUT THE INVENTION

The specific embodiments, structures, features and functions of the present invention are described in detail below with reference to the accompanying drawings and preferred embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

1 to 5, FIG. 1 is a schematic structural view of a preferred embodiment of an electromagnetic pulse protection stealth cloak of a curved shape structure of the present invention; FIG. 2 is a preferred embodiment of an electromagnetic pulse protection stealth cloak of a curved shape structure of the present invention. 3 is a cross-sectional view of a preferred embodiment of an electromagnetic pulse protection invisible cloak of a curved shape structure of the present invention; FIG. 4 is a preferred embodiment of a protection unit in an electromagnetic pulse protection invisible cloak of the curved shape structure of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS Figure 5 is a schematic illustration of a preferred embodiment of a guard unit in an electromagnetic pulse protection invisible cloak of a curved shape structure of the present invention. The electromagnetic pulse protection stealth cloak 1 of the curved shape structure of the present invention is superposed by a plurality of annular protective layers 10 to form a cylindrical structure. The annular protective layer 10 includes an outer curve and an inner curve, and the outer curve and the inner curve are irregular curves, and the outer curve and the inner curve are scaled according to a preset ratio (for example, τ), wherein between the outer curve and the inner curve Solid annular protective layer 10 Further, as shown in Figures 2 to 5, each annular protective layer 10 includes a plurality of protective units 100 therein. A plurality of guard units 100 are continuously disposed on each of the annular protective layers 10. Wherein, the bottom of the electromagnetic pulse protection stealth cloak 1 of the curved shape structure of the present invention is provided with an annular ground plate 20, and the electromagnetic pulse protection stealth cloak 1 of the curved shape structure is provided with a plurality of metallized tubes 106, the metallized tube The metallized tube 106 is connected to the annular grounding plate 20, and the metallized tube 106 is connected to the shielding unit 100. The metallized tube 106 is provided with a plurality of metallized holes 110. In other embodiments, the floor 20 and the metallization tube 107 may be omitted. The protection unit 100 is a cubic structure.

[0030] Each of the guard units 100 has a dielectric constant of ε and a magnetic permeability μ

[0031] wherein,

1 "

0

[0033]

;' ■ ■■■':,.'' ■ ■■■■ ■■ ■'- ^J ■■ ■■ G g ■ ■■■■ ■: ■ ■■

, :r[:r- f '

[0035] « : ,. :_. : :

[0036] wherein, Θ is the angle between the line connecting the center point of the protection unit 100 and the center O in the protective layer 10 and the positive direction of the x-axis, r is the center point of the protection unit 100 in the protective layer 10 to the center 0 of the protective layer 1 Distance, R (e) curve function (arbitrary curve can be represented by Fourier sequence), d is the length of the guard unit 100, X and y are the coordinates of the center point of each guard unit 100, and τ is the outer curve and the inner layer of the protective layer 10 The scaling between the curves (τ is less than 1, the value of τ is the ratio between the longest distance from the center 0 to the inner curve and the longest distance from the center 0 to the outer curve).

[0037] That is to say, if each of the protection units 100 is made of the above-mentioned material having a dielectric constant of ε and a magnetic permeability of μ, the protection against electromagnetic pulses can be completed. It should be noted that the dielectric constant ε and the magnetic permeability μ of the shielding unit 100 at different positions on each of the annular protective layers 10 are not the same. A plurality of guard units 100 made of a plurality of different materials can form an electromagnetic pulse protection, that is, guide the electromagnetic wave propagation path based on the conformal transformation theory and the optical transformation theory (refer to 2006, U. Leonhardt and JBPendry, respectively, In the journal Science, the theory of conformal transformation and the theory of optical transformation are proposed to guide electromagnetic waves. Propagation path) to protect electromagnetic pulses. Since the conformal transformation theory and the optical transformation theory are prior art, they are not described herein. The material may be any of a variety of suitable materials such as nanomaterials, graphene materials, plasma materials, and the like.

Further, it is well known that the dielectric constant and magnetic permeability of materials can be equivalently simulated in a distributed LC circuit network. That is to say, for the material having the above dielectric constant ε and magnetic permeability μ, an equivalent simulation can be employed using a circuit. Specifically, each of the protection units 100 employs four inductors and one capacitor to obtain a material having an equivalent dielectric constant of ε and a magnetic permeability μ. A metallized tube 106 is connected between the protective layer 10 and the protective layer 10. Specifically, as shown in FIG. 3 and FIG. 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, and 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 by wires to form a square structure, and the fifth inductor 105 is One end 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, and the first capacitor 106 is connected to the first inductor 101. a wire connected in series with the second inductor 102, the second capacitor 107 is connected to a wire connected in series between the first inductor 101 and the fourth inductor 104, and the third capacitor 108 is connected to the second inductor 102 and the third a wire connected in series between the inductors 103, the fourth capacitor 109 is connected to a wire connected in series between the third inductor 103 and the fourth inductor 104, the first capacitor 106, the second capacitor 107, the third capacitor 108, and the fourth Capacitors 109 are each connected to a metallization hole 110. The inductance values of the second inductor 102 and the fourth inductor 104 are both 4L (refer to FIG. 4), and the inductance of the fifth inductor 105 is 2L ₂ (refer to FIG. 4), the first inductor 101 and The inductance value of the third inductor 103 is 4L ₃ , and the capacitance values of the first capacitor 106, the second capacitor 107, the third capacitor 108, and the fourth capacitor 109 are both C/4. among them,

~ ^.

, d is the length of the protection unit 100, L, and L ₂ L ₃ are inductance values, and C is a capacitance value. It should be noted that the adjacent protection units 100 in the same annular protection layer 10 are connected to each other (such as the connection manner of the four protection units 100 in FIG. 4, the protection unit 100 in the upper left corner and the protection unit 100 in the upper right corner) The protection unit in the lower left corner is connected).

[0039] Further, in the present embodiment, d is calculated as follows: (1=λ/3, X=C/f, C is a constant speed of light, and f is a maximum frequency corresponding to a frequency range in which electromagnetic pulse energy is concentrated. (The frequency range of the electromagnetic pulse is 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 electromagnetic pulse energy is concentrated.) For a rectangular pulse, the continuous daytime is 1 nanosecond, then the energy of the rectangular pulse is mainly concentrated in O-lOGHz, then according to =C/f=3*10 ⁸ /10*10 ⁹ = 3 cm, the size of each protection unit 100 is less than or equal to d= /3=3m/3=lcm.

[0040] In order to verify the protective performance of the electromagnetic pulse protection stealth cloak 1 of the curved shape structure, four electromagnetic pulses are used to verify the protection performance of the electromagnetic pulse protection stealth cloak 1 of the curved shape structure.

[0041] wherein, FIG. 7-1 to FIG. 7-3 are schematic diagrams of simulations of the electromagnetic pulse protection stealth cloak of the curved shape structure of the present invention for the triangular electromagnetic pulse, as can be seen from FIG. 7-1 to FIG. 7-3, the triangular electromagnetic The pulse passes through the electromagnetic pulse protection stealth cloak of the curved shape structure, and the inner curve area of the electromagnetic pulse stealth cloak 1 does not have a triangular pulse passing through, wherein, referring to FIG. 6-1, the parameter is τ=1/3, R( e)=0.7+0.1sin(e) +0.3sin(3e)+0.2cos(5e) The parameter is a=0.5m, b=lm, the horizontal axis of the triangle electromagnetic pulse graph represents the inter-turn, the unit is _ns , the range The value is 0-35 ns, and the vertical axis represents current in mA.

8-1 to 8-3 are schematic diagrams of simulations of rectangular electromagnetic pulses of the electromagnetic pulse protection stealth cloak of the curved shape structure of the present invention. As can be seen from FIG. 8-1 to FIG. 8-3, the rectangular electromagnetic pulse passes through The electromagnetic pulse protection stealth cloak of the curved shape structure is 1 吋, and the inner curve area of the electromagnetic pulse stealth cloak 1 does not have a rectangular pulse passing through, wherein, referring to FIG. 6-2, the parameter is τ=1/3, R(e) =0.7+0.1sin(e)+0.3sin(3e)+0.2 cos(5e) The parameter is a=0.5m, b=lm, , and the horizontal axis of the rectangular electromagnetic pulse graph represents the inter-turn, the unit is n s, the range is 0-35ns, and the vertical axis represents current in mA.

9-1 to 9-3 are schematic diagrams showing the simulation of the sinusoidal electromagnetic pulse of the electromagnetic pulse protection stealth cloak of the curved shape structure of the present invention. As can be seen from FIG. 9-1 to FIG. 9-3, the sinusoidal electromagnetic pulse passes through The electromagnetic pulse protection stealth cloak of the curved shape structure is 1 吋, and the inner curved region of the electromagnetic pulse stealth cloak 1 does not have a sinusoidal pulse passing through, wherein, referring to FIG. 6-3, the parameter is τ=1/3, R(e) =0.7+0.1sin(e)+0.3sin(36)+0.2 cos(56) , the horizontal axis of the sinusoidal electromagnetic pulse represents the interturn, the unit is ns, the range is 0-35ns, and the vertical axis represents current, the unit is mA.

10-1 to 10-3 are schematic diagrams of simulation of a Gaussian electromagnetic pulse of an electromagnetic pulse protection stealth cloak of a curved shape structure of the present invention. As can be seen from FIG. 10-1 to FIG. 10-3, the Gaussian electromagnetic pulse passes through The electromagnetic pulse protection stealth cloak of the curved shape structure is 1 吋, and the inner curve area of the electromagnetic pulse stealth cloak 1 does not have a Gaussian pulse passing through, wherein, referring to FIG. 6-4, the parameter is τ=1/3, R(6) =0.7+0.1sin(e)+0.3sin(3e)+0.2c _OS (5e) The parameter is a=0.5m, b=lm. In the graph of Gaussian electromagnetic pulse, the horizontal axis represents the inter-turn, the unit is ns, and the range is 0-35ns, the vertical axis represents current, and the unit is mA.

The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformations made by the description of the invention and the contents of the drawings, or indirectly or indirectly The technical field is equally included in the scope of patent protection of the present invention.

Industrial applicability

[0046] The present invention adopts the above technical solution, and brings the technical effects as follows: The electromagnetic pulse protection stealth cloak of the curved shape structure of the invention can completely reflect, absorb or attenuate electromagnetic pulses, and the protected object is not subjected to electromagnetic pulse. The impact of the electromagnetic pulse damage of the electronic information system is effectively avoided, and the life of the electronic information system is prolonged.

Claims

Claim

[Claim 1] An electromagnetic pulse protection stealth cloak having a curved shape structure, wherein the electromagnetic pulse protection stealth cloak of the circular structure is composed of a plurality of curved shape protective layers, wherein each curved shape The protective layer is provided with a plurality of protection units from the inside to the outside; each of the protection units has a dielectric constant of ε, a magnetic permeability, wherein

Wherein, Θ is the angle between the line connecting the center point of the protection unit 100 and the center O in the protective layer 10 and the positive direction of the x-axis, and r is the distance from the center point of the protection unit 100 in the protective layer 10 to the center 0 of the protective layer 1 R (e) Fourier sequence curve function, d is the length of the guard unit, X and y are the coordinates of the center point of each guard unit, and τ is the scale between the outer curve and the inner curve of the guard layer.

[Claim 2] The electromagnetic pulse protection stealth cloak of the curved shape structure according to claim 1, wherein the bottom of the electromagnetic pulse protection stealth cloak of the curved shape structure is provided with an annular ground plate, and the curved shape a plurality of metallized tubes are disposed in the electromagnetic pulse protection stealth cloak of the structure, the metallized tube vertically passes through the annular protective layer and is connected to the annular grounding plate, and the metallized tube is connected to the protective unit. The metallization tube is provided with a plurality of metallization holes; the protection unit includes a first inductor, a second inductor, a third inductor, a fourth inductor, a fifth inductor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, wherein the first inductor, the second inductor, the third inductor, and the fourth inductor are connected in series by a wire, and one end of the fifth inductor is connected between the first inductor and the fourth inductor, The other end of the five inductors is connected between the second inductor and the third inductor, and the first capacitor is connected to the wire connected in series between the first inductor and the second inductor. The second capacitor is connected to the wire connected in series between the first inductor and the fourth inductor, the third capacitor is connected to the wire connected in series between the second inductor and the third inductor, and the fourth capacitor is connected to the third inductor and a wire connected in series between the fourth inductors, wherein the first capacitor, the second capacitor, the third capacitor, and the fourth capacitor are respectively connected to one metallization hole, and the inductance values of the second inductor and the fourth inductor are both 4L _1; The inductance of the fifth inductor is 2L ₂ , the inductance values of the first inductor and the third inductor are both 4L ₃ , and the capacitance values of the first capacitor, the second capacitor, the third capacitor, and the fourth capacitor are both C/4. among them

, d is the length of the protection unit, L, L ₂ L ₃ are the inductance values, and C is the capacitance value.

[Claim 3] The electromagnetic pulse protection stealth cloak of the curved shape structure according to claim 2, wherein d is calculated as follows: ά = λβ, X = C / f, C is a constant speed of light, and f is electromagnetic The maximum frequency corresponding to the frequency range in which the pulse energy is concentrated.

[Claim 4] The electromagnetic pulse protection stealth cloak of the curved shape 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.