Optimal design of broadband linear-to-circular polarization conversion metasurface

Wang, Jiao; Zhao, Xin-Cheng; Jiang, Yan-Nan; Gu, Wei-Qi; Xu, Kai-Da

doi:10.1016/j.matdes.2024.113004

Materials & Design

2024

DOI: 10.1016/j.matdes.2024.113004

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Optimal design of broadband linear-to-circular polarization conversion metasurface

Jiao Wang,

Xin-Cheng Zhao,

Yan-Nan Jiang

et al.

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Cited by 3 publications

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Designing broadband cross-polarization conversion metasurfaces using binary particle swarm optimization algorithm

Wang,

Gu,

Zhao

et al. 2024

Materials & Design

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Designing broadband cross-polarization conversion metasurfaces using binary particle swarm optimization algorithm

Wang,

Gu,

Zhao

et al. 2024

Materials & Design

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Research on the miniaturization method of the broadband linear-to-circular polarization conversion metasurface based on genetic algorithm

Ma,

Hu,

Zhou

et al. 2024

Opt. Express

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The size of the metasurface unit cell increases with the decrease of its center working frequency (CF). This is not conducive to the integrated design of the metasurface. To address the problem, a miniaturization design method based on genetic algorithm (GA) is proposed. Firstly, an element library is established. By randomly selecting and combining these elements, various structures are generated as the initial population of GA. Secondly, a Python-CST joint simulation program is constructed to automatically model the metasurface unit cells and extract their electromagnetic parameters. Finally, after multiple iterations of optimization, the optimized unit cell is obtained. This paper takes the transmissive-type linear-to-circular polarization conversion metasurface (LTCPCM) as a research object. The simulation results show that the size of the designed unit cell is only 0.18 λ of the CF (3.86 GHz). The LTCPCM exhibits broadband and wide-angle characteristics, with a fractional bandwidth (FB) of 71% (incident angle θ = 0°) and an angular stability (AS) of 45°. The experimental validation and the simulation result are consistent, proving the effectiveness of the proposed method. The research results can provide a reference for further miniaturization design of metasurface unit cells.

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High-Efficiency and Ultrawideband Polarization Conversion Metasurface Based on Topology and Shape Optimizaiton Design Method

Liu,

Tang,

Wang

2024

Symmetry

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This study introduces a two-stage optimization method for designing an ultrawideband polarization conversion metasurface. By integrating topology and shape optimization techniques, the proposed method expands the design space to achieve enhanced polarization conversion bandwidth. The first stage employs genetic-algorithm-based topology optimization to establish the initial structural configuration through binary coding. Subsequently, the second stage refines the design through shape optimization by extracting and modifying the boundaries of the topology-optimized structure. The optimized design demonstrates high polarization conversion efficiency (>90%) across 4.08–14.39 GHz, yielding a relative bandwidth of 111.64%, which represents a 4.88% improvement compared to topology-only optimization. This enhancement demonstrates the effectiveness of our combined optimization method in ultrawideband polarization conversion metasurface design, offering a promising method for developing high-performance electromagnetic devices.

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Optimal design of broadband linear-to-circular polarization conversion metasurface

Cited by 3 publications

References 24 publications

Designing broadband cross-polarization conversion metasurfaces using binary particle swarm optimization algorithm

Designing broadband cross-polarization conversion metasurfaces using binary particle swarm optimization algorithm

Research on the miniaturization method of the broadband linear-to-circular polarization conversion metasurface based on genetic algorithm

High-Efficiency and Ultrawideband Polarization Conversion Metasurface Based on Topology and Shape Optimizaiton Design Method

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