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An electromagnetic shielding structure based on double-layer cut-off circular waveguide array metal mesh/film

A technology of electromagnetic shielding structure and metal structure, applied in the direction of magnetic/electric field shielding, electrical components, etc., can solve the problems of high-power microwave limitation, difficulty in light weight, thick thickness, etc., to achieve effective electromagnetic protection, weight reduction, and wide frequency bandwidth Effect

Active Publication Date: 2018-03-13
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The frequency of use of single-layer or double-layer wire mesh does not exceed 100MHz, and the shielding effectiveness is less than 120dB. However, the thickness of the single-layer cut-off circular waveguide array metal plate is relatively thick, so it is difficult to achieve light weight
Therefore, the application in the protection of high-power microwaves is limited

Method used

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  • An electromagnetic shielding structure based on double-layer cut-off circular waveguide array metal mesh/film
  • An electromagnetic shielding structure based on double-layer cut-off circular waveguide array metal mesh/film
  • An electromagnetic shielding structure based on double-layer cut-off circular waveguide array metal mesh/film

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Embodiment 1

[0043] refer to Figure 2-3 , the present embodiment provides an electromagnetic shielding structure based on a double-layer cut-off circular waveguide array metal mesh, including a cut-off circular waveguide unit 1 and a cut-off circular waveguide array metal structure 2; wherein, the first cut-off circular waveguide array metal mesh 21 and the second cut-off circular waveguide array metal mesh 21 The hole arrays of the cut-off circular waveguide units 1 on the metal mesh 22 of the cut-off circular waveguide array are dislocated. When high-power microwaves are irradiated, the electromagnetic shielding structure can greatly attenuate the incident power to achieve electromagnetic protection against high-power microwaves.

[0044] The material of the electromagnetic shielding structure in this embodiment is copper.

[0045] In this embodiment, the electromagnetic shielding structure is fixed by the peripheral edge of the system.

[0046] figure 2 Among them, the white round ...

Embodiment 2

[0050] refer to Figure 4-5 , this embodiment provides a hybrid electromagnetic shielding structure based on a double-layer cut-off circular waveguide array metal mesh-metal film, including a cut-off circular waveguide unit 1 , a first cut-off circular waveguide array metal mesh 21 and a metal film 23 . When high-power microwaves are irradiated, the hybrid electromagnetic shielding structure of cut-off circular waveguide array metal mesh-metal film can greatly attenuate the incident power and realize electromagnetic protection against high-power microwaves.

[0051] The metal material of the electromagnetic shielding structure in this embodiment is copper.

[0052] In this embodiment, the electromagnetic shielding structure is fixed by the peripheral edge of the system.

[0053] The diameter D of the diameter of the electromagnetic shielding structure of this embodiment is 10cm, the diameter d of the cut-off circular waveguide unit 1 is 0.4mm, the distance c between the cente...

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Abstract

The invention discloses an electromagnetic shielding structure based on double-layer cut-off circular waveguide array metal mesh / film, comprising: cut-off circular waveguide unit and cut-off circular waveguide array metal structure; wherein, the cut-off circular waveguide array metal structure is composed of a first cut-off circular waveguide array metal structure. The circular waveguide array metal mesh and the second cutoff circular waveguide array metal mesh are formed, or the first cutoff circular waveguide array metal mesh and the metal film are formed; the cutoff circular waveguide unit is arranged on the first cutoff circular waveguide array metal mesh and the first cutoff circular waveguide array metal mesh. The second cut-off circular waveguide array metal mesh; the cut-off circular waveguide units on the first cut-off circular waveguide array metal mesh and the second cut-off circular waveguide array metal mesh are arranged in the same position or dislocation. When the high-power microwave is irradiated, the electromagnetic shielding structure based on the double-layer cut-off circular waveguide array metal mesh / film can greatly attenuate the incident power. The invention has the advantages of low cost, light weight, wide frequency band and high shielding efficiency.

Description

technical field [0001] The invention relates to the technical field of high-power microwave electromagnetic protection, in particular to an electromagnetic shielding structure based on a double-layer cut-off circular waveguide array metal mesh / film. Background technique [0002] High-Power Microwave (HPM) is a microwave electromagnetic pulse with a peak power greater than 100MW, which is mainly used in directed energy electromagnetic weapons of electronic warfare. Its working principle is to use a high-gain directional antenna to radiate high-power microwave energy generated by a high-power microwave source, and irradiate the target with high intensity to achieve the purpose of killing enemy personnel and destroying electronic equipment. The damage and destruction of electronic and circuit systems by high-power microwaves is mainly divided into three stages: collection, coupling and damage. High-power microwaves couple high-power microwave energy into the system, and couple...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05K9/00
Inventor 廖斌金开涛
Owner EAST CHINA NORMAL UNIV
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