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Influence of Spatial Correlation Function on Characteristics of Wideband Electromagnetic Wave Absorbers with Chaotic Surface

Influence of Spatial Correlation Function on Characteristics of Wideband Electromagnetic Wave Absorbers with Chaotic Surface

作     者:Rui Zhang Fan Ding Xujin Yuan Mingji Chen 张蕊;丁凡;元旭津;陈明继

作者机构:Beijing Key Laboratory of Lightweight Multi-Functional Composite Materials and StructuresInstitute of Advanced Structure TechnologyBeijing Institute of TechnologyBeijing 100081China China Ship Development and Design CenterWuhan 430064China 

出 版 物:《Chinese Physics Letters》 (中国物理快报(英文版))

年 卷 期:2022年第39卷第9期

页      面:23-27页

核心收录:

学科分类:0809[工学-电子科学与技术(可授工学、理学学位)] 07[理学] 08[工学] 070201[理学-理论物理] 0702[理学-物理学] 

基  金:supported by the National Natural Science Foundation of China(Grant Nos.12072031 11872113 and 11702024) 

主  题:absorption Electromagnetic reflectivity 

摘      要:Electromagnetic metasurface with chaos patterned surface could bring rich interaction modes contributing to fully disordered random motions in deterministic systems, which preform uncertainty, irreducibility and unpredictability. We investigate the influence of the correlation function(CF) properties of surface random patterns on the wave absorption performance. The complicated correlation function provides a fully developed random state, broadening the absorption bandwidth significantly and is helpful for reaching higher absorption rate. With the increasing number of peaks in the correlation function, the absorption band at-15 d B reflectivity widens significantly, band at-20 d B reflectivity begins to emerge. As the first peak’s distance from the original point in the CF is enlarged, the absorption trough is gradually formed and deepened to-35 d B level. The results give in-depth understanding of the relation between absorption behavior and controlling parameters including correlation, image information and foam spacer layer thickness. This high absorption absorber has great application potential in customizable radio communication compatibility device and anechoic testing chamber.

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