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arXiv 1210.0653physics.optics
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用于太赫兹通信的反射阵列天线

Reflectarray antennas for terahertz communications

Tiaoming Niu, Withawat Withayachumnankul, Benjamin S. -Y. Ung, Hakan Menekse, Madhu Bhaskaran, Sharath Sriram, Christophe Fumeaux

摘要:

反射阵列组成的谐振微带金贴片的电介质基板上的操作表明在太赫兹频率。基于贴片尺寸和反射相位之间的关系,在贴片阵列上实现渐进相位分布,以创建能够使入射光束朝向偏离镜面方向的预定角度偏转的反射器。为了验证设计的正确性,制作了一组360 × 360贴片单元周期性分布的反射阵列,并进行了测试。通过太赫兹时域光谱(THz-TDS)获得的实验结果表明,高达近80%的入射振幅偏转到所需的方向在接近1太赫兹的工作频率。在不同的频率下,还得到了TM和TE极化下的反射阵的辐射方向图。这项工作提出了一个有吸引力的概念,开发组件能够有效地操纵太赫兹辐射新兴的太赫兹通信。

英文摘要:

Reflectarrays composed of resonant microstrip gold patches on a dielectric substrate are demonstrated for operation at terahertz frequencies. Based on the relation between the patch size and the reflection phase, a progressive phase distribution is implemented on the patch array to create a reflector able to deflect an incident beam towards a predefined angle off the specular direction. In order to confirm the validity of the design, a set of reflectarrays each with periodically distributed 360*360 patch elements are fabricated and measured. The experimental results obtained through terahertz time-domain spectroscopy (THz-TDS) show that up to nearly 80% of the incident amplitude is deflected into the desired direction at an operation frequency close to 1 THz. The radiation patterns of the reflectarray in TM and TE polarizations are also obtained at different frequencies. This work presents an attractive concept for developing components able to efficiently manipulate terahertz radiation for emerging terahertz communications.

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