Embedding Design, Fabrication and Broadband Microwave Absorption of Composite Laminates with Embedded Three-dimensional Metastructures

LIANG Yu; WU Jinxin; BI Miaomiao; LI Xiaoqiang; CHEN Yuan; HU Yuchen; CHEN Zhihong

doi:10.19554/j.cnki.1001-3563.2025.17.007

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Packaging Engineering ›› 2025, Vol. 46 ›› Issue (17) : 58-68. DOI: 10.19554/j.cnki.1001-3563.2025.17.007

Special Topic on Lightweight Broadband Electromagnetic Composite Materials

Embedding Design, Fabrication and Broadband Microwave Absorption of Composite Laminates with Embedded Three-dimensional Metastructures

LIANG Yu, WU Jinxin, BI Miaomiao, LI Xiaoqiang^*, CHEN Yuan, HU Yuchen, CHEN Zhihong

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Abstract

The work aims to achieve broadband microwave absorption under limited thickness by embedding multi-mechanism three-dimensional (3D) metastructures into composite laminates. Magnetic microwave absorbents were added to the composite matrix with a concentration gradient constructed along the thickness direction. 3D metastructures were further embedded into the gradient magnetic medium to activate multiple absorption mechanisms including multi-resonance, magnetic loss and dielectric loss, while regulating scattering to reduce vertical direction reflection, thereby improving low-frequency and high-frequency broadband absorption performance of the composite laminates. The 3D metastructures and magnetic medium produced synergistic loss effects, enhancing localized electromagnetic resonance in low frequency to improve low-frequency absorption, while forming directional scattering in high frequency to reduce reflection. An 8-mm-thick magnetic composite laminate was designed, achieving reflection loss below -10 dB over 1.8-18 GHz with an effective bandwidth of 16.2 GHz. The design was further validated experimentally. Embedding 3D metastructures in magnetic composite laminates can effectively enable synergistic interactions among multiple electromagnetic loss mechanisms and enhancement of broadband absorption.

Key words

electromagnetic metamaterials / synergistic loss / broadband absorption / low-frequency absorption

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LIANG Yu, WU Jinxin, BI Miaomiao, LI Xiaoqiang, CHEN Yuan, HU Yuchen, CHEN Zhihong. Embedding Design, Fabrication and Broadband Microwave Absorption of Composite Laminates with Embedded Three-dimensional Metastructures[J]. Packaging Engineering. 2025, 46(17): 58-68 https://doi.org/10.19554/j.cnki.1001-3563.2025.17.007

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