深圳大学学报理工版

提出T形结构太赫兹频率编码器,其由初始相位值相同、相位灵敏度不同的4种同一形态、尺寸不一的T形编码超表面单元构成.利用预先设计的编码序列,实现对太赫兹波1 bit、2 bit编码和非周期太赫兹频率编码.无需重新设计编码器结构,仅通过改变工作频率,就可灵活控制反射太赫兹波的方向,理论计算与软件仿真结果吻合.提出的太赫兹频率编码器对反射太赫兹波主瓣能量具有很好的分散作用,能有效减少雷达散射截面.该器件在太赫兹波隐身中具有巨大应用价值.

We propose a terahertz frequency coding metasurface based on T-shaped structure. It is composed of four kinds of coding metasurface cells with the same initial phase value and different phase sensitivity. Based on the pre-designed coding sequence, 1 bit, 2 bit periodic and non-periodic terahertz frequency coding metasurfaces are realized. By changing the working frequency, terahertz wave radiation energy can be effectively controlled without redesigning the coding metasurface cell. The theoretical calculation results are in good agreement with the simulation results. The designed terahertz frequency coding metasurface has a good dispersion effect on the main lobe energy of the reflected terahertz wave and effectively reduces the radar scattering cross section. Our device has great application value in the terahertz wave stealth.

引言
1 T形超表面结构设计
2 1 bit太赫兹编码
3 2 bit太赫兹编码与随机编码
4 非周期太赫兹编码
5 结语

图1 T形频率编码超表面单元结构和幅频响应<br/>Fig.1 Unit cell of T-shaped frequency coding metasurface and amplitude-frequency response

图1 T形频率编码超表面单元结构和幅频响应
Fig.1 Unit cell of T-shaped frequency coding metasurface and amplitude-frequency response

图2 五种不同的T形频率编码器<br/>Fig.2 Five different kinds of T-shaped frequency coding metasurfaces

图2 五种不同的T形频率编码器
Fig.2 Five different kinds of T-shaped frequency coding metasurfaces

图3 以“0- 0,0-1…”序列沿x方向周期排列1 bit频率编码器仿真结果<br/>Fig.3 Simulation results of periodic 1 bit frequency coding metasurface with sequence “0- 0,0-1…” along x-direction

图3 以“0- 0,0-1…”序列沿x方向周期排列1 bit频率编码器仿真结果
Fig.3 Simulation results of periodic 1 bit frequency coding metasurface with sequence “0- 0,0-1…” along x-direction

表1 1 bit太赫兹频率编码器单元反射相位与频率对应关系<br/>Table 1 Reflection phase and frequency correspondence of 1 bit terahertz frequency coding metasurface unit cell

表1 1 bit太赫兹频率编码器单元反射相位与频率对应关系
Table 1 Reflection phase and frequency correspondence of 1 bit terahertz frequency coding metasurface unit cell

图4 棋盘式1 bit频率编码器仿真结果<br/>Fig.4 Simulation results of chessboard 1 bit frequency coding metasurface

图4 棋盘式1 bit频率编码器仿真结果
Fig.4 Simulation results of chessboard 1 bit frequency coding metasurface

图5 2 bit周期频率编码器仿真结果<br/>Fig.5 Simulation results of 2 bit periodic frequency coding metasurface

图5 2 bit周期频率编码器仿真结果
Fig.5 Simulation results of 2 bit periodic frequency coding metasurface

图6 2 bit随机频率编码器仿真结果<br/>Fig.6 Simulation results of 2 bit random frequency coding metasurface

图6 2 bit随机频率编码器仿真结果
Fig.6 Simulation results of 2 bit random frequency coding metasurface

图7 2 bit非周期频率编码器仿真结果<br/>Fig.7 Simulation results of 2 bit non-periodic frequency coding metasurface

图7 2 bit非周期频率编码器仿真结果
Fig.7 Simulation results of 2 bit non-periodic frequency coding metasurface

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引言

1 T形超表面结构设计

2 1 bit太赫兹编码

3 2 bit太赫兹编码与随机编码

4 非周期太赫兹编码

5 结语

期刊信息

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