基于改进粒子群优化算法的宽角度高吸收率超材料吸波体设计  

Design of Wide-Angle,High-Absorption Metamaterial Absorber Based on Improved Particle Swarm Optimization Algorithm

作　　者：周瑶 孙俊[1] 彭艺[1] 孙磊 戴书浩 Zhou Yao;Sun Jun;Peng Yi;Sun Lei;Dai Shuhao(School of Information Engineering and Automation,Kunming University of Science and Technology,Kunming 650504,Yunnan,China;School of Business and Tourism Management,Yunnan University,Kunming 650504,Yunnan,China)

机构地区：[1]昆明理工大学信息工程与自动化学院,云南昆明650504 [2]云南大学工商管理与旅游管理学院,云南昆明650504

出　　处：《激光与光电子学进展》2022年第11期418-426,共9页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(61761025)。

摘　　要：超材料吸波体的性能受电磁波入射角度的影响,具有宽角度稳定性的吸波体一直是吸波体设计的难点之一。传统设计方式依赖于人工设计和优化,存在设计困难且周期长的缺陷。针对设计目标的特点,基于改进粒子群优化算法设计了宽角度高吸收率超材料吸波体。通过添加动态权值和高斯误差解决二进制粒子群优化算法后期局部搜索能力弱的问题,用改进的二进制粒子群优化算法优化吸波体表层0、1编码的离散金属块结构实现高吸收率和宽入射角吸收特性。仿真结果表明,设计的超材料吸波体在9.4~13.3 GHz频段的吸收率大于90%,在11.6~12.6 GHz频段内可实现完美吸收(吸收率大于99%),横电、横磁极化波60°斜入射情况下超材料吸波体在带宽内的吸收率大于80%。该设计方法有效弥补了传统设计方法的缺陷,展现出按需设计和设计过程无需人为干预的独特优势,在相关领域具有广泛的应用前景。The performance of metamaterial absorbers can be affected by the incident angle of electromagnetic waves,and it is difficult to design metamaterial absorbers with wideangle stability.The traditional method relies on artificial design and optimization,which limited by its difficulty and long cycle.According to the target design’s characteristics,we design a wideangle and highabsorptivity metamaterial absorber based on the improved particle swarm optimization algorithm.Dynamic weights and Gaussian errors are added to resolve the problem of weak local search ability in the later stage of binary particle swarm optimization algorithm.To achieve wideangle and highabsorptivity characteristics of the absorber,the improved binary particle swarm optimization algorithm is used to optimize the structure of discrete metal blocks coded with 0 and 1 on the surface of the absorber.The simulation results show that the designed metamaterial absorber has a high absorptivity of greater than 90%from 9.4-13.3 GHz,and perfect absorption,i.e.,absorptivity exceeds 99%,is obtained in the broadband of 11.6-12.6 GHz.Moreover,the absorption remains above 80%,even for the incidence angles of up to 60°under both transverse electric and transverse magnetic polarizations.This design method overcomes the shortcomings of the traditional design method and demonstrates the unique advantages of ondemand design without human intervention in the design process.This technique has broad application prospects in related fields.

关 键 词：光学器件 超材料 吸波体 宽角度 二进制粒子群优化算法 编码 

分 类 号：TB34[一般工业技术—材料科学与工程]