Intelligent design method of microwave broadband supersurface absorber

An intelligent design and absorber technology, applied in design optimization/simulation, instrumentation, computer material science, etc., can solve the problems that limit the development and application of microwave absorbers, consume a lot of time, etc., and achieve low cost, fast time response, and accuracy high rate effect

Active Publication Date: 2020-06-05
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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  • Application Information

AI Technical Summary

Problems solved by technology

This method not only consumes a lot of time, but the result is usually a local optimal solution, which greatly limits the development and application of microwave absorbers.

Method used

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  • Intelligent design method of microwave broadband supersurface absorber
  • Intelligent design method of microwave broadband supersurface absorber
  • Intelligent design method of microwave broadband supersurface absorber

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0025] In this embodiment, a 3-layer microwave absorber structure is designed to verify the effectiveness of the intelligent design method. image 3 A schematic diagram of the structure is given; different broadband absorption can be achieved in the range of 0.1-18GHz by designing the thickness and width of polymethacrylimide (PMI) foam and the width of the metal ring.

[0026] First, the structure is simulated in the microwave band 0.1-18GHz, and the incident direction of the incident wave is normal incidence. The reflection coefficient of the structure under normal incidence was obtained by the electromagnetic simulation software CST, as Figure 4 shown.

[0027] Because of the lack of a transmission spectrum, the absorbance is calculated using the following formula:

[0028] Absorption = A = 1-|r| 2 (1)

[0029] where r represents the reflection coefficient.

[0030] In order to characterize the practicability of this method, the relative spectral error is defined as ...

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Abstract

The invention provides an intelligent design method of a microwave broadband supersurface absorber. According to the intelligent design method, a deep learning method is adopted, so that a user can select the absorption spectrum according to own requirements. The deep learning method is composed of an automatic coding network and a convolutional neural network. The two neural networks are combined, and an ensemble learning strategy is adopted. Intermediate layer implicit features of the automatic coding network are used as input of the convolutional neural network, and finally the convolutional neural network outputs structural parameters of the microwave absorber. According to the method, overfitting in deep learning training can be reduced to a great extent, so that the accuracy of the whole intelligent design can be greatly improved. The method has the advantages of fast time response, high accuracy, low cost and the like.

Description

technical field [0001] The invention relates to the field of microwave absorption, in particular to an intelligent design method for a microwave broadband supersurface absorber, and belongs to the fields of deep learning and microwave broadband absorption. Background technique [0002] Electromagnetic absorbers play a very important role in many applications, such as radar stealth, electromagnetic compatibility, heat radiators. Conventional broadband absorbers are mainly realized by metal and dielectric stacks. In recent years, metasurfaces have attracted extensive attention due to their unique electromagnetic properties such as amplitude, phase, and polarization control. With proper design, metasurfaces can realize many exotic functions, such as invisibility, holography, metalens, etc. Metasurfaces have been demonstrated to achieve efficient electromagnetic absorption. At present, the design optimization of microwave broadband metasurface absorbers mainly uses simulation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G16C60/00G06N3/04
CPCG16C60/00G06N3/045
Inventor 罗先刚蒲明博马晓亮李雄马巨
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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