A miniaturized high-performance broadband absorber based on 2.5-D meander lines and magnetic materials at low frequencies

Xuewei Zhang; Shaobin Liu; Qiming Yu; Lingling Wang; Kun Liao

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A miniaturized high-performance broadband absorber based on 2.5-D meander lines and magnetic materials at low frequencies

机译：基于2.5-D曲折线和低频磁性材料的小型化高性能宽带吸收器

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摘要

A miniaturized metamaterial absorber (MA) with resistive 2.5-dimensional (2.5-D) meander lines (ML) and magnetic materials (MM) layer backed by a conducting ground, which exhibits good absorbing performance, is designed and experimentally demonstrated. The 2.5-D layer is two pairs of ML are connected in series by the four vias cross dipole structure where resistive sheets are loaded on both sides. The MM substrate has both high permeability and permittivity for bandwidth expanding at low frequencies. The 2.5-D layer and MM layer are separated by an air layer. In the positive resonance region of air layer, strong magnetic squeezing effect occurs. This results in significant magnetic field enhancement within the MM layer. Results indicate that an absorption at lower frequencies is significantly enhanced and is above 90% in 0.8 to 3.2 GHz at normal incidence and the relative bandwidth is 120%. A key feature of the proposed absorber is that its unit cell is only 0.019 λ_L × 0.019 λ_L, which exhibits satisfactory stability for different polarization states and incident angles. Experimental results are presented and compared to numerical simulations, showing a reasonable agreement. This work providing new ways for miniaturized high-performance absorbing materials of wider bandwidth and stronger absorption.

机译：设计和实验地证明了具有良好吸收性能的电阻2.5维（2.5-D）曲折线（ML）和磁性材料（MM）层的小型化的超材料吸收体（MA）。 2.5-D层是两对M1，由四个通孔串联连接，其中电阻板在两侧装载。 MM基材在低频下扩展的带宽渗透性和介电常数。 2.5-D层和MM层由空气层分开。在空气层的正共振区域中，发生强磁性挤压效应。这导致MM层内的显着磁场增强。结果表明，较低频率的吸收显着增强，并且在正常发射时，0.8至3.2GHz的高于90％，相对带宽为120％。所提出的吸收器的一个关键特征是其单元电池仅为0.019λ_L×0.019λ_1，这表现出不同偏振态和入射角的令人满意的稳定性。呈现实验结果与数值模拟相比，显示了合理的协议。这项工作为更广泛带宽和更强的吸收的小型化高性能吸收材料提供了新的方式。

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来源
《International journal of RF and microwave computer-aided engineering》 |2021年第5期|22601.1-22601.9|共9页
作者
Xuewei Zhang; Shaobin Liu; Qiming Yu; Lingling Wang; Kun Liao;
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作者单位

College of Electronic and Information Engineering Nanjing University of Aeronautics and Astronautics Nanjing China;

College of Electronic and Information Engineering Nanjing University of Aeronautics and Astronautics Nanjing China;

College of Electronic and Information Engineering Nanjing University of Aeronautics and Astronautics Nanjing China;

College of Electronic and Information Engineering Nanjing University of Aeronautics and Astronautics Nanjing China;

College of Electronic and Information Engineering Nanjing University of Aeronautics and Astronautics Nanjing China;

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正文语种 eng
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关键词
2.5-dimensional; absorber; broadband; high-performance; magnetic materials; miniaturized;

机译：2.5维;吸收剂;宽带;高性能;磁性材料;小型化;

A miniaturized high-performance broadband absorber based on 2.5-D meander lines and magnetic materials at low frequencies

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