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Construction method of a magnetic loss type shrinkage absorbing material

A technology of a wave absorbing material and a construction method, which is applied in the construction field of a magnetic loss type reduced-ratio wave absorbing material, can solve problems such as limitations, and achieve the effect of ensuring design accuracy and facilitating manufacturing.

Active Publication Date: 2020-12-22
SHANGHAI RADIO EQUIP RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Document "Li Jialiang, Gu Jun, Wang Xiaobing. Research on Electromagnetic Scale Test Technology on Cement Floor [J]. Guidance and Fuze. 2009, 30(2): 57-60." Using composite material construction technology to make a simulated sample block of cement floor, After testing its electromagnetic scattering, the principle of non-metallic scaling is initially verified. However, this type of material is only limited to dielectric materials, and magnetic loss materials are not considered.

Method used

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  • Construction method of a magnetic loss type shrinkage absorbing material
  • Construction method of a magnetic loss type shrinkage absorbing material
  • Construction method of a magnetic loss type shrinkage absorbing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] 1. Input the electromagnetic parameters of the prototype uniform absorbing material;

[0095] Set the electromagnetic parameters, frequency and scaling factor of the prototype, such as ε=22.3-j1.1, μ=3.2-j2.6, prototype frequency f=5GHz, scaling factor s=2, thickness d=0.5mm, the The scaled frequency f can be obtained when s = 10GHz.

[0096] 2. Calculate the transmission parameters and reflection parameters of the prototype uniform absorbing material;

[0097] According to the electromagnetic parameters of the absorbing material and the thickness of the prototype absorbing material, the reflection coefficient and transmission coefficient are calculated using the transmission matrix equation of the single-layer material, and the results are as follows:

[0098] T=e -jγL =0.75-j0.37.

[0099] reflection parameter transfer parameters

[0100] 3. Establish the electromagnetic parameter library of magnetic loss electromagnetic materials;

[0101] The establishme...

Embodiment 2

[0109] 1. Input the electromagnetic parameters of the prototype uniform absorbing material;

[0110] Set the electromagnetic parameters, frequency and scaling factor of the prototype, such as ε=22.03-j1.31, μ=3.71-j2.53, prototype frequency f=4GHz, scaling factor s=3, thickness d=1mm, at this time The scaled frequency f can be obtained s = 12GHz.

[0111] 2. Calculate the transmission parameters and reflection parameters of the prototype uniform absorbing material;

[0112] According to the electromagnetic parameters of the absorbing material and the thickness of the prototype absorbing material, the reflection coefficient and transmission coefficient are calculated using the transmission matrix equation of the single-layer material, and the results are as follows:

[0113] T=e -jγL =0.42-j0.59.

[0114] reflection parameter transfer parameters

[0115] 3. Establish the electromagnetic parameter library of magnetic loss electromagnetic materials;

[0116] Referring...

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Abstract

The invention discloses a construction method for a magnetic loss type shrinking ratio wave-absorbing material. According to the method, structure distribution characteristics are utilized to optimize electromagnetic parameters of a prototype homogeneous material according to the prototype homogeneous material, so that construction of a shrinking ratio material is realized; a distribution structure of the material and internal particles is integrally introduced into design and preparation of the shrinking ratio material; and the design of a filling structure wave-absorbing layer with different particles is adopted in the shrinking ratio material to achieve needed absorption performance, so that the requirement for consistency between transmission characteristics and reflection characteristics of the material is maintained. The calculation method is simple, design efficiency is high, the prepared shrinking ratio material has high shrinking ratio parameter precision and small material characteristic deviation, and transmission and reflection characteristics of electromagnetic waves under a shrinking ratio test condition can be realized.

Description

technical field [0001] The invention relates to the field of design and manufacture of complex-structured wave-absorbing materials, in particular to a construction method of a magnetic loss type scaled-down wave-absorbing material. Background technique [0002] The analysis of the electromagnetic scattering characteristics of the scaled target is an effective means to realize the analysis and test of the full-scale model, and more importantly, it can provide basic test data and reference for the characteristic test and evaluation of the uncertain model. At present, with the extensive use of composite materials in uncertain models, such as surface absorbing coatings, leading edge absorbing structures, etc., it has been difficult for pure metal or low-loss non-metal scale test models to meet the needs of scale test. In order to accurately obtain the radar cross section of the prototype target, the scaled model and the prototype target need to keep the electrical size ratio unc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G16C60/00
CPCG06F30/20
Inventor 许勇刚袁黎明梁子长高伟
Owner SHANGHAI RADIO EQUIP RES INST
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