基于谐振型左手材料理论, 提出了一种新型的宽频带、低损耗左手材料结构单元。利用Nicolson-Ross-Weir算法和Ansoft HFSS软件, 得到该结构单元的等效介电常数、等效磁导率和等效折射率。结果表明, 该结构单元具有低损耗特性; 在23~32.3 GHz频段范围内, 其等效介电常数和等效磁导率均为负, 同时等效折射率的实部为负, 虚部接近于0。该结构为单元Kα波段左手材料的设计及其应用提供了一定的参考。

Based on the theory of resonant-type left-handed materials, a novel structural unit of left-handed materials with broadband and low loss is proposed. By using the Nicolson-Ross-Weir algorithm and the Ansoft HFSS software, the equivalent permittivity, the equivalent permeability and the equivalent refractive index of the structural unit are obtained. The results show that the proposed structural unit has a low loss characteristic. In the frequency range of 23-32.3 GHz, both the equivalent permittivity and the equivalent permeability of the proposed structural unit are negative, meanwhile, the real part of the equivalent refractive index is negative while the imaginary part is close to zero. The proposed structural unit can provide a certain reference for the design and application of left-handed materials in the Kα band.