| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Influence of Spatial Correlation Function on Characteristics of Wideband Electromagnetic Wave Absorbers with Chaotic Surface |
| Rui Zhang1, Fan Ding2*, Xujin Yuan1*, and Mingji Chen1 |
1Beijing Key Laboratory of Lightweight Multi-Functional Composite Materials and Structures, Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081, China
2China Ship Development and Design Center, Wuhan 430064, China
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| Cite this article: |
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Rui Zhang, Fan Ding, Xujin Yuan et al 2022 Chin. Phys. Lett. 39 094101 |
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Abstract 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 $-15$ dB reflectivity widens significantly, band at $-20$ dB 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 $-35$ dB 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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Received: 20 July 2022
Published: 03 September 2022
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| PACS: |
41.20.Jb
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(Electromagnetic wave propagation; radiowave propagation)
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78.40.-q
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(Absorption and reflection spectra: visible and ultraviolet)
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05.45.-a
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(Nonlinear dynamics and chaos)
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05.45.Ac
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(Low-dimensional chaos)
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