通过在衬底材料单侧周期性排列金属线与方形开口谐振环,设计了一种新型左手结构。通过理论分析和软件仿真,提取了该左手材料的有效电参数。结果表明,在11.7~20.5 GHz频段内,该左手结构表现出良好的负折射效应与双负特性,绝对带宽达8.8 GHz,对Ku波段(8~12 GHz)实现了全覆盖,单元损耗小于0.4 dB。加工制作了实物并对其进行了测试,验证了其左手特性。与传统左手材料相比,所设计的左手材料实现了低损耗和宽频带。

A novel left-handed structure is designed by periodically arranging metal wires and square diagonal-opening resonators on a single side of a substrate material. Based on the theoretical analysis and software simulation, the effective electromagnetic parameters of this designed left-handed material are extracted. The results show that, in the frequency band of 11.7-20.5 GHz, this structure possesses a good negative refraction effect and double negative characteristics and its absolute bandwidth is 8.8 GHz, which coverages the whole Ku band (8-12 GHz), and the loss of unit cell is less than 0.4 dB. Its real object is fabricated and tested, and its left-hand characteristic is confirmed. Compared with the conventional left-handed materials, the designed left-handed material realizes a low loss and a wide bandwidth.