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Equivalent electromagnetic parameter extraction method of gradient honeycomb wave-absorbing material

A technology of equivalent electromagnetic parameters and wave absorbing materials, applied in the field of computational electromagnetics, can solve the problems of inaccurate equivalent electromagnetic parameters and unconsidered physical size parameters of gradient structures, and achieves accurate equivalent electromagnetic parameters, convenient use, principle simple effect

Active Publication Date: 2020-06-09
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0005] In view of the above problems or deficiencies, in order to solve the problem that the physical size parameters of the specific gradient structure are not considered in the existing equivalent electromagnetic parameter extraction method, resulting in inaccurate equivalent electromagnetic parameters obtained

Method used

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  • Equivalent electromagnetic parameter extraction method of gradient honeycomb wave-absorbing material
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  • Equivalent electromagnetic parameter extraction method of gradient honeycomb wave-absorbing material

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Embodiment Construction

[0048] In order to further illustrate the present invention and verify the correctness of the present invention, a specific extraction process of the equivalent electromagnetic parameters of the gradient honeycomb absorbing material and the physical test experiment and results are given.

[0049] Flowchart such as figure 1 As shown, the specific steps are as follows:

[0050] Step 1. Obtain the scattering parameters S of the gradient honeycomb absorbing material, including S 11 and S 21 . Draw the gradient honeycomb structure material in the electromagnetic simulation software CST, set the boundary conditions of the periodic unit, the electromagnetic wave is vertically incident along the positive gradient direction of the coating, and perform frequency domain simulation within 2-18GHz to obtain the scattering parameters S, including S 11 and S 21 . The specific steps are:

[0051] The gradient honeycomb absorbing material is composed of periodic structural units, the top...

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Abstract

The invention belongs to the technical field of computational electromagnetism, and particularly relates to an equivalent electromagnetic parameter extraction method of a gradient honeycomb wave-absorbing material. According to the invention, a multi-valued problem is solved by adopting an imaginary part phase compensation method; the influence of a gradient unique structure of a gradient honeycomb wave-absorbing material on equivalent parameters is considered, wherein the parameters mainly comprise the coating thickness of an electromagnetic wave incident end, the coating thickness of an electromagnetic wave emergent end, the number of gradient layers of the gradient honeycomb wave-absorbing material, the increment between the adjacent gradient coatings and other physical dimension parameters so as to extract the equivalent electromagnetic parameters of the gradient honeycomb wave-absorbing material. The technical scheme has the advantages of being simple in principle and convenient to use, and the obtained equivalent electromagnetic parameters are relatively accurate.

Description

technical field [0001] The invention belongs to the technical field of computational electromagnetics, and in particular relates to a method for extracting equivalent electromagnetic parameters of a gradient honeycomb wave-absorbing material. Background technique [0002] Honeycomb absorbing material is a material that imitates the hexagonal structure of natural honeycomb and has the characteristics of absorbing electromagnetic waves. Due to its low density, light weight, low thermal conductivity and relatively high strength and rigidity, it is widely used as the core of sandwich structures. Since the absorbing performance of the gradient honeycomb absorbing material is much better than that of the uniform honeycomb absorbing material, the gradient honeycomb absorbing material has a wider range of applications in practice. [0003] In actual project engineering, it is usually expected to know the equivalent electromagnetic parameters of the gradient honeycomb absorbing mate...

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Application Information

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IPC IPC(8): G06F30/20G06F111/10
Inventor 陈海燕沈荣博饶鸿丰安旭邓龙江谢建良陆海鹏张丽周志鹏李小秋
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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