不同大气窗口太赫兹偏振器的仿真设计

Design of Terahertz Polarizers for Different Atmospheric Windows

太赫兹偏振器是太赫兹雷达和太赫兹通信的必要器件.针对太赫兹雷达和太赫兹通信应用的0.12THz,0.225THz,0.3THz,0.35THz,0.41THz,0.67THz,0.85THz,2.5THz附近的大气窗口,设计了太赫兹波金属线栅结构偏振器,研究了不同大气窗口偏振器的金属线半径和线栅周期对其偏振性能的影响.结果表明,金属线半径和线栅周期对偏振器的反射系数和透射系数有重要影响;对于太赫兹波段不同大气窗口,偏振器有不同的最佳金属线半径和线栅周期;通过对金属线栅偏振器的结构尺寸优化,得到了不同大气窗口偏振器的最佳尺寸范围.所设计的偏振器具有高隔离度、低插入损耗和低驻波比的优越性能.

Polarizers are required for terahertz radar and terahertz communication systems. Metal grid polarizers are designed for terahertz applications at different atmospheric windows around 0.12,0.225,0.3,0.35,0.41,0.67,0.85 and 2.5 THz,respectively. The influence of the radius of the metal wires and the period of the grids on the polarization efficiency is studied. It is shown that the metal wire radius and the grid period have significant influence on the reflection and transmission coefficients of the polarizer...