宽带透射吸收极化无关超材料吸波体  

A broadband transmission absorption polarization-independent metamaterial absorbe

作　　者：鲁磊[1] 屈绍波[1] 施宏宇[2] 张安学[2] 夏颂[3] 徐卓[3] 张介秋[1] 

机构地区：[1]空军工程大学理学院,西安710051 [2]西安交通大学电子与信息工程学院,西安710049 [3]西安交通大学,电子材料与器件教育部重点实验室,西安710049

出　　处：《物理学报》2014年第2期340-345,共6页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:11274389);国家重点基础研究发展计划(批准号:2009CB623306)资助的课题~~

摘　　要：提出了一种新的基于磁性吸波体材料的具有低频透射和高频宽带吸收特性的超材料吸波体.该超材料吸波体在1 GHz的透射系数为-0.5 dB,具有较好的低频透射特性,可以实现对低频信号的相互通信;在频率大于8.4 GHz的频段,吸收率均大于80%,基本覆盖整个X波段和Ku波段,实现高频宽带吸收.此外,由于该超材料吸波体的单元金属周期结构具有较好的四重旋转对称性,因而是极化无关的.该透射吸收超材料吸波体设计简单,实用性强,具有较强的潜在应用价值.In this paper, we propose a new metamaterial absorber based on magnetic absorbing material. This absorber has the characteristics of low-frequency transmission and high-frequency broadband absorption. The transmission co-efficient of the metamaterial absorber is -0.5 dB at 1 GHz： the good low-frequency transmission property can realize intercommunication between the low-frequency signals. The absorptivity is greater than 80% in the frequency range above 8.4 GHz, which almost covers all the X-band and Ku-band frequencies. In addition, the metamaterial absorber is polarization-independent due to the fourfold rotational symmetry of the unit cell metallic periodic structure. The metamateiral absorber has the advantages of simple design, strong practicability, and high potential application value.

关 键 词：透射吸收 宽带 超材料吸波体 

分 类 号：TB34[一般工业技术—材料科学与工程]