Differential evolution algorithm based multi-layer frequency selection surface composite wave-absorbing structure and material optimum design method

Abstract

The invention discloses a differential evolution algorithm based multi-layer frequency selection surface composite wave-absorbing structure and material optimum design method. The method includes: performing mutation and crossover operations by the aid of the different evolution algorithm; subjecting the composite structure to modeling calculation by the aid of electromagnetic simulation software and feeding back calculated results to a program to complete the operations; searching and generating an optimum model reaching the objective function and optimal structure parameters and material materials in variant fields. By the differential evolution algorithm based multi-layer frequency selection surface composite wave-absorbing structure and material, the model can be optimized in structure parameters, and a new material with the optimal ratio can be obtained through the differential evolution algorithm according to an original absorber and the electromagnetic parameters on the substrate. The optimum design method has the advantages that design cycle is short, and the composite wave-absorbing structure and material low in reflection coefficient, wide in frequency band and thin in thickness can be obtained rapidly.

Description

technical field [0001] The invention relates to the technical field of wave-absorbing materials, in particular to an optimal design method for obtaining a multilayer frequency-selective surface composite wave-absorbing structure and material with low reflection coefficient, wide frequency band, and thin thickness. Background technique [0002] With the development of electronic technology and military technology, the introduction of frequency selective surface into the design of multilayer absorbing materials can effectively improve the absorption performance of absorbing materials, and meet the needs of broadband and strong absorption of absorbing materials. Reasonable design methods are helpful to guide the research and development of multi-layer frequency selective surface composite absorbing structures, which can greatly improve the efficiency of research and design, reduce a large number of experimental explorations, and shorten the design cycle. [0003] At present, th...

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Problems solved by technology

[0003] At present, the commonly used design method of multi-layer composite absorbing structure is to adjust the structure, size and material ratio one by one according to experience. It is difficult to obtain a structure that can meet the target requirements, and there is also a lack of directional guidance for the design of absorbing materials, which makes the design cycle long and the workload huge

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