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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.
A new metamaterial absorber with low frequency transmission and high frequency bandwidth absorption was proposed based on the magnetic absorber material.The transmissivity of the metamaterial absorber was -0.5 dB at 1 GHz, Low-frequency transmission characteristics, enabling low-frequency signals to communicate with each other; in the frequency band greater than 8.4 GHz, the absorption rate is greater than 80%, covering the entire X-band and Ku band, to achieve high-frequency broadband absorption.In addition, The periodic metal structure of the unit cell has good quadruple rotational symmetry and thus polarization independent. The transmissive absorption metamaterial absorber is simple in design and practical, and has strong potential application value.