WO2018126583A1

WO2018126583A1 - Equivalent circuit-based electromagnetic pulse protection invisibility cloak having cylindrical structure

Info

Publication number: WO2018126583A1
Application number: PCT/CN2017/084469
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: 2017-05-16
Publication date: 2018-07-12
Also published as: CN106900167A; CN106900167B

Abstract

An equivalent circuit-based electromagnetic pulse protection invisibility cloak (1) having a cylindrical structure. The invisibility cloak (1) consists of multiple stacked annular protection layers (10). Multiple metalized tubes are provided within the invisibility cloak (1). The metalized tubes pass perpendicularly through the annular protection layers (10), and are connected to an annular ground plate. Each of the annular protection layers (10) is provided with multiple circular tracks arranged from an inner side to an outer side, and each of the circular tracks is provided with multiple sequentially arranged protection units. The annular ground plate and multiple metalized tubes are provided at a lower portion of the equivalent circuit-based electromagnetic pulse protection invisibility cloak (1) having a cylindrical structure, the metalized tubes pass perpendicularly through the annular protection layers (10) and are connected to the annular ground plate, and the metalized tubes are provided with metalized holes. The protection units comprise four inductors connected in parallel and one capacitor, and the capacitor is connected to the metalized holes. 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 cape based on cylindrical structure of equivalent circuit

[0001] The present invention relates to the field of electromagnetic protection, and in particular to an electromagnetic pulse protection stealth cloak of a cylindrical structure based on an equivalent circuit.

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] A primary object of the present invention is to provide an electromagnetic pulse protection stealth cloak based on a cylindrical structure of an equivalent circuit, 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 of a cylindrical structure based on an equivalent circuit, wherein the electromagnetic pulse protection stealth cloak of the cylindrical structure based on the equivalent circuit is superimposed by a plurality of annular protective layers The bottom of the electromagnetic pulse protection stealth cloak of the cylindrical structure based on the equivalent circuit Is provided with an annular grounding plate, wherein the electromagnetic pulse protection invisible cloak of the cylindrical structure based on the equivalent circuit is provided with a plurality of metallized tubes, the metallized tube vertically passing through the annular protective layer and connected to the ring a floor connection, wherein each annular protection layer is provided with a plurality of circular tracks from the inside to the outside, and a plurality of protection units are continuously disposed on each of the circular tracks, and the metallized tube vertically passes through the annular protection layer and The annular ground plate is connected, and the metallized tube is provided with a metallized hole;

[0006] The protection unit includes a first inductor, a second inductor, a third inductor, a fourth inductor, and a capacitor, wherein the first inductor, the second inductor, the third inductor, the fourth inductor, and the capacitor are connected in parallel, and the capacitor Connecting with the metallized hole, the distance between the first inductor and the fourth inductor is equal to the distance between the second inductor and the third inductor, and the inductance values of the first inductor and the fourth inductor are both, the second inductor and The inductance value of the third inductor is

, the capacitance value of the capacitor

among them,

, the thickness of the ΔΓ annular protective layer, ΔΘ is the span of the annular protective layer, α is the inner radius of the annular protective layer, b is the outer radius of the annular protective layer, r is the radius corresponding to the protective unit in the annular protective layer, d is the The distance between an inductor and a fourth inductor, εθ is the dielectric constant in vacuum and the permeability in vacuum.

[0007] Preferably, d is calculated as follows: 3,, ■■■■■ c is the speed of light constant,

f.

The maximum frequency corresponding to the frequency range in which the electromagnetic pulse energy is concentrated.

[0008] 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

[0009] The present invention adopts the above technical solution, and brings the technical effects as follows: The electromagnetic pulse protection stealth cloak of the cylindrical structure based on the equivalent circuit of the invention can completely reflect, absorb or attenuate the electromagnetic pulse, and the protected object is not It will be affected by electromagnetic pulse, effectively avoiding the electromagnetic pulse damage of the electronic information system and prolonging the life of the electronic information system.

Brief description of the drawing

DRAWINGS

1 is a schematic structural view of an electromagnetic pulse protection stealth cloak of a cylindrical structure based on an equivalent circuit of the present invention;

2 is a cross-sectional view showing a preferred embodiment of an electromagnetic pulse protection stealth cloak of a cylindrical structure based on an equivalent circuit of the present invention;

3 is a cross-sectional view showing a preferred embodiment of an electromagnetic pulse protection stealth cloak of a cylindrical structure based on an equivalent circuit of the present invention; [0012] FIG.

4 is a schematic view showing the layout of an electromagnetic pulse protection stealth cloak of a cylindrical structure based on an equivalent circuit of the present invention;

5 is a schematic diagram of a preferred embodiment of a guard unit in an electromagnetic pulse protection stealth cloak of a cylindrical structure based on an equivalent circuit according to the present invention;

[0015] FIG. 6-1 to FIG. 6-4 are schematic diagrams of simulating four electromagnetic pulses of an electromagnetic pulse protection stealth cloak of a cylindrical structure based on an equivalent circuit according to the present invention;

7-1 to 7-3 are electromagnetic pulse protection stealth cloaks of a cylindrical structure based on an equivalent circuit of the present invention. Simulation diagram of a triangular electromagnetic pulse;

8-1 to 8-3 are schematic diagrams showing simulations of a rectangular electromagnetic pulse of an electromagnetic pulse protection stealth cloak of a cylindrical structure based on an equivalent circuit according to the present invention;

9-1 to 9-3 are schematic diagrams showing simulations of a sinusoidal electromagnetic pulse of an electromagnetic pulse protection stealth cloak of a cylindrical structure based on an equivalent circuit according to the present invention;

10-1 to 10-3 are schematic diagrams showing the simulation of a Gaussian electromagnetic pulse by an electromagnetic pulse protection stealth cape of a cylindrical structure based on an equivalent circuit of the present invention.

[0020] 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

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 an electromagnetic pulse protection stealth cloak of a cylindrical structure based on an equivalent circuit of the present invention; FIG. 2 is an electromagnetic pulse protection stealth of a cylindrical structure based on an equivalent circuit of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 3 is a cross-sectional view of a preferred embodiment of an electromagnetic pulse protection stealth cloak of a cylindrical structure based on an equivalent circuit of the present invention; FIG. 4 is an electromagnetic diagram of a cylindrical structure based on an equivalent circuit of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 5 is a schematic diagram of a preferred embodiment of a guard unit in an electromagnetic pulse protection stealth cloak of a cylindrical structure based on an equivalent circuit of the present invention. The electromagnetic pulse protection stealth cloak 1 of the cylindrical structure based on the equivalent circuit of the present invention is composed of a plurality of annular protective layers 10 superposed. The electromagnetic circuit protection stealth cloak 1 based on the equivalent circuit has a cylindrical structure. Each of the annular protective layers 10 has a thickness d. Further, as shown in FIGS. 2 to 5, each of the annular protective layers 10 includes a plurality of guard units 100 therein. Each of the annular protective layers 10 is provided with a plurality of circular tracks from the inside to the outside, and a plurality of protection units 100 are continuously disposed on each of the circular tracks. Wherein, the bottom of the electromagnetic pulse protection stealth cloak 1 of the cylindrical structure based on the equivalent circuit is provided with an annular ground plate 20, and the electromagnetic pulse protection stealth cloak 1 of the cylindrical structure based on the equivalent circuit is provided with a plurality of metallizations a tube 107, the metallized tube 107 vertically passes through the annular protective layer 10 and is connected to the annular ground plate 20, the metallized tube 107 and the The protection unit 100 is connected, and the metallized tube 107 is provided with a metallized hole 106.

[0023] Each of the guard units 100 has a dielectric constant of ε and a magnetic permeability of μ.

[0024] wherein,

[0025] wherein a (ie, a in FIG. 3) is the inner radius of the annular protective layer 10, b is the outer radius of the annular protective layer 10, and r is the radius corresponding to the guard unit 100 in the annular protective layer 10.

That is, if each of the protection units 100 has the dielectric constant calculated as described above

The magnetic permeability is made of μ, and the protection of the electromagnetic pulse 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 protection units 100 made of a plurality of different materials can form an electromagnetic pulse protection, that is, a propagation path of electromagnetic waves based on conformal transformation theory and optical transformation theory (refer to 2006, U. Leonhardt and J. B Endry et al. Peer in the "Science" magazine proposed the theory of conformal transformation and optical transformation theory, used to guide the propagation path of electromagnetic waves) to protect electromagnetic pulses. Since the conformal transformation theory and the optical transformation theory are prior art, they will not be described herein. The material may be any of a variety of suitable materials such as nanomaterials of different specifications, graphene materials, plasma materials, and the like.

[0027] 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. Metallized holes 106 are used between the protective layer 10 and the protective layer 10. connection. Specifically, as shown in FIG. 4 and FIG. 5, the protection unit 100 includes a first inductor 101, a second inductor 102, a third inductor 103, a fourth inductor 104, and a capacitor 105, where the first inductor 101, the first The second inductor 102, the third inductor 103, the fourth inductor 104 and the capacitor 105 are connected in parallel. The capacitor 105 is connected to the metallization hole 106, and the distance between the first inductor 101 and the fourth inductor 104 is the same. The distance between the two inductors 102 and the third inductor 103 is equal. The inductance values of the first inductor 101 and the fourth inductor 104 are both

(Refer to the inductance values of the second inductor 102 and the third inductor 103 shown in FIG. 5

(Refer to the capacitance value of capacitor 105 shown in Figure 5)

. among them

s 11⁄2 - ; d

Where ΔΓ is the thickness of the annular protective layer 10, ΔΘ is the span of the annular protective layer 10, a (ie, a in FIG. 3) is the inner radius of the annular protective layer 10, and b is the outer radius of the annular protective layer 10. And r is the radius corresponding to the protection unit 100 in the annular protection layer 10, d is the distance between the first inductance 101 and the fourth inductance 104 (or the second inductance 102 and the third inductance 103), L_6 and L_r are both Inductance value, C_z is the capacitance value, εθ is the dielectric constant in vacuum, and μ_0 is the magnetic permeability in vacuum. 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).

Further, in the present embodiment, ΔΓ is equal to d, and d is calculated as follows: d= /3, = 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 (electromagnetic The frequency range of the pulse is positive infinity to negative infinity, but the energy of the electromagnetic pulse is mainly concentrated in a certain frequency range, f is The frequency range of the electromagnetic pulse energy concentration corresponds to the maximum frequency). For a rectangular pulse, a duration of 1 nanosecond inches, the rectangular pulse energy is concentrated in 0-10GH _Z, according to the

£ / :: TM~■■■ :§■ :,ι: 3⁄4=■■3一 ■

In centimeters, the size of each guard unit 100 is less than or equal to d = /3 = 3m / 3 = lcm.

[0029] In order to verify the protection performance of the electromagnetic pulse protection stealth cloak 1 of the equivalent circuit-based cylindrical structure, the protective performance of the electromagnetic pulse protection stealth cloak 1 of the equivalent circuit-based cylindrical structure is adopted by four electromagnetic pulses. authenticating. Fig. 6-1 to Fig. 6-4 are schematic diagrams showing the simulation of four kinds of electromagnetic pulses for the electromagnetic pulse protection stealth cloak of the cylindrical structure based on the equivalent circuit.

[0030] FIG. 7-1 to FIG. 7-3 are schematic diagrams of simulation of a triangular electromagnetic pulse for an electromagnetic pulse protection stealth cloak of a cylindrical structure based on an equivalent circuit according to the present invention, which can be seen from FIG. 7-1 to FIG. 7-3. The triangular electromagnetic pulse passes through the electromagnetic pulse protection stealth cloak of the cylindrical structure based on the equivalent circuit, and the inner circle of the electromagnetic pulse stealth cloak 1 does not have a triangular pulse, wherein, in combination with FIG. 6-1, the parameter is a= 0.3m, b=0. 7m, the horizontal axis of the triangular electromagnetic pulse diagram represents the interturn, the unit is ns, the range is 0-35ns, and the vertical axis represents the current, the unit is mA.

8-1 to 8-3 are schematic diagrams of simulation of a rectangular electromagnetic pulse for an electromagnetic pulse protection stealth cloak of a cylindrical structure based on an equivalent circuit according to the present invention, as can be seen from FIG. 8-1 to FIG. The rectangular electromagnetic pulse passes through the electromagnetic pulse protection stealth cloak of the cylindrical structure based on the equivalent circuit, and the inner circle of the electromagnetic pulse stealth cloak 1 does not have a rectangular pulse passing through, wherein, in combination with FIG. 6-2, the parameter is a=0.3 m. , b = 0.7m, the horizontal axis of the rectangular electromagnetic pulse diagram represents the interturn, the unit is ns, the range is 0-35ns, and the vertical axis represents the current, the unit is mA.

9-1 to 9-3 are schematic diagrams of simulation of a sinusoidal electromagnetic pulse of an electromagnetic pulse protection stealth cloak of a cylindrical structure based on an equivalent circuit according to the present invention, as can be seen from FIG. 9-1 to FIG. The sinusoidal electromagnetic pulse passes through the electromagnetic pulse protection stealth cloak of the cylindrical structure based on the equivalent circuit, and the inner circle of the electromagnetic pulse stealth cloak 1 does not have a sinusoidal pulse, wherein, in combination with FIG. 6-3, the parameter is a=0.3 m. , b = 0.7m, the horizontal axis of the sinusoidal electromagnetic pulse represents the inter-turn, the unit is ns, the range is 0-35ns, and the vertical axis represents the current, the unit is mA.

10-1 to FIG. 10-3 are schematic diagrams showing the simulation of the Gaussian electromagnetic pulse of the electromagnetic pulse protection stealth cloak of the cylindrical structure based on the equivalent circuit of the present invention, as can be seen from FIG. 10-1 to FIG. Gaussian electromagnetic pulse The electromagnetic pulse protection stealth cloak of the cylindrical structure based on the equivalent circuit is 1 吋, and the inner circle of the electromagnetic pulse stealth cloak 1 does not have a Gaussian pulse passing through, wherein, in combination with FIG. 6-4, the parameter is a=0.3 m, b=0.7 m, Gaussian electromagnetic pulse graph in the horizontal axis represents the inter-turn, the unit is ns, the range is 0-35ns, the vertical axis represents the current, the unit is mamo

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

[0035] The present invention adopts the above technical solution, and brings the technical effects as follows: The electromagnetic pulse protection stealth cloak of the cylindrical structure based on the equivalent circuit of the invention can completely reflect, absorb or attenuate the electromagnetic pulse, and the protected object is not It will be affected by electromagnetic pulse, effectively avoiding the electromagnetic pulse damage of the electronic information system and prolonging the life of the electronic information system.

Claims

Claim

[Claim 1] An electromagnetic pulse protection stealth cloak of a cylindrical structure based on an equivalent circuit, characterized in that

The electromagnetic pulse protection stealth cloak of the cylindrical structure based on the equivalent circuit is composed of a plurality of annular protective layers, and the bottom of the electromagnetic pulse protection stealth cloak of the cylindrical structure based on the equivalent circuit is provided with an annular ground plate. A plurality of metallized tubes are disposed in the electromagnetic pulse protection stealth cloak of the cylindrical structure based on the equivalent circuit, the metalized tubes vertically passing through the annular protective layer and connected to the annular grounding plate, wherein each annular protection The layer is provided with a plurality of circular tracks from the inside to the outside, and a plurality of protection units are continuously arranged on each circular track.

The metallized tube vertically passes through the annular protective layer and is connected to the annular ground plate, and the metallized tube is provided with a metallized hole; the protection unit includes a first inductor, a second inductor, and a third An inductor, a fourth inductor, and a capacitor, wherein the first inductor, the second inductor, the third inductor, the fourth inductor, and the capacitor are connected in parallel, the capacitor is connected to the metallization hole, and the distance between the first inductor and the fourth inductor is The distance between the second inductor and the third inductor is equal, and the inductance values of the first inductor and the fourth inductor are both

The inductance values of the second inductor and the third inductor are both

The capacitance value of the capacitor

among them,

, the thickness of the ΔΓ annular protective layer, ΔΘ is the span of the annular protective layer, a is the inner radius of the annular protective layer, b is the outer radius of the annular protective layer, r is the radius corresponding to the protective unit in the annular protective layer, d is the The distance between an inductor and the fourth inductor, εθ is the dielectric constant in vacuum, and μ_0 is the permeability in vacuum.

[Claim 2] The electromagnetic pulse protection stealth cloak of the equivalent structure based cylindrical structure according to claim 1, wherein d is calculated as follows: entangled 3 3⁄4=

C is the speed of light constant,

f

[Claim 3] The electromagnetic pulse protection stealth cloak of the cylindrical structure based on the equivalent circuit according to claim 2, wherein the electromagnetic pulse frequency is a triangular electromagnetic pulse, a rectangular electromagnetic pulse, a sinusoidal electromagnetic pulse or a Gaussian electromagnetic pulse.