中文摘要：

太赫兹波具有频率高、带宽宽、波束窄的特点,为军事方面的发展创造了有利的条件.人工电磁超材料是材料设计领域的一种全新的理念,本研究设计出两个人工电磁超表面结构单元,找到相位差为180度左右的频率点,并将两个结构单元组合成一个整体AMC结构.利用CST软件进行远场反射仿真,得出金属板的RCS为-66.4d B,AMC结构的RCS为-85.9d B,缩减量达到19.5d B,较金属板RCS缩减率接近30%,在1.15THz-1.27THz频段内实现了RCS的缩减,理论分析与仿真结果一致,所设计的结构实现了RCS缩减.

英文摘要：

Terahertz （THz） technology has been developed in various research fields especially in military applications due to the characteristics of high frequency, large bandwidth and narrow beam shape. Besides, artificial electromagnetic metamaterial is a new concept in material esigning for optoelectronics. Two unit structures which are about 180 degrees in difference of phase were also proposed. In the simulations, the overall AMC structure was obtained by the combination of two unit cells in different arrangement sequences. The RCS of AMCs reached 85.9 dB, which reduced 19.5dB in 1.15 - 1. 27 THz compared with that of the metal plate. The theoretical analysis is consistent with the simulation results calculated by CST software.