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A Method of Using Plasma Coating to Reduce the Reflection of Electromagnetic Waves on Metal Surfaces

A plasma coating and metal surface technology, applied in special data processing applications, complex mathematical operations, geometric CAD, etc., can solve the problems of lack of plasma electromagnetic scattering application background and achieve the effect of small electromagnetic wave reflection

Active Publication Date: 2021-06-04
SHANGHAI RADIO EQUIP RES INST
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Problems solved by technology

[0009] It is completely based on the theoretical research of the equivalent complex permittivity, and lacks the specific application background of plasma electromagnetic scattering around ultra-high-speed flying targets

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  • A Method of Using Plasma Coating to Reduce the Reflection of Electromagnetic Waves on Metal Surfaces

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Embodiment Construction

[0035] The present invention will be further elaborated below by describing a preferred specific embodiment in detail in conjunction with the accompanying drawings.

[0036] The real part of plasma equivalent complex permittivity is closely related to plasma electron density, plasma type, and collision frequency. The real part of the plasma dielectric constant is proportional to the electron density. When the plasma electron density is small, the plasma behaves as a high-loss dielectric substance with a relative permittivity whose real part is between 0 and 1 and whose imaginary part is negative. With the increase of plasma electron density, the real part and imaginary part of plasma relative permittivity gradually increase respectively. Electromagnetic waves entering the plasma are quickly absorbed and attenuated sharply. Plasma in this case shows a strong ionization, electromagnetic waves are difficult to transmit.

[0037] Based on this theory, the concept of multi-layer...

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Abstract

A method of using plasma coating to reduce the reflection of electromagnetic waves on a metal surface. The plasma coating of multiple layers of different media is applied on the metal surface to analyze and determine the parameters of the coated plasma coating according to the frequency characteristics of the incident electromagnetic wave, including the following steps: S1. Preliminarily determine the plasma coating parameters based on prior experience, and obtain the plasma coating model accordingly; S2. Combining the known incident electromagnetic wave equation and the plasma coating model obtained in S1, establish the propagation of electromagnetic waves in the plasma coating S3, calculate the reflection and transmission coefficients of the incident electromagnetic wave at the interface layer by layer, and accumulate them as the total electromagnetic wave reflection coefficient; S4, change the type of plasma medium several times, adjust the electron density of the plasma, change the thickness of the plasma coating, and repeat the steps S3, observe the actual reflection of electromagnetic waves, and select the best coating parameters from them. The invention has the advantages that the electromagnetic wave is absorbed to the greatest extent in the plasma coating and realizes smaller reflection of the electromagnetic wave.

Description

technical field [0001] The invention relates to the technical field of calculation of radar target electromagnetic scattering characteristics, in particular to a method for reducing the reflection of electromagnetic waves on a metal surface by using a plasma coating. Background technique [0002] The so-called stealth aircraft means that the aircraft cannot be detected by electromagnetic detectors such as radar. Its essence is that the aircraft will completely or nearly completely absorb the detection electromagnetic wave, and will not reflect or reflect less electromagnetic wave. Plasma coating with multiple layers of different materials and densities is a better option. [0003] Such as figure 1 As shown, when the plane electromagnetic wave is incident on the multi-layer plasma coating, reflection and refraction will occur at the interface of different media, and finally reach the metal surface to which the plasma coating is attached. The most ideal state is that when t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/15G06F17/11G06F111/10
CPCG06F17/11G06F30/20G06F2111/10
Inventor 陈方园许勇刚谢志杰梁子长
Owner SHANGHAI RADIO EQUIP RES INST
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