Opt Lett. 2018 Jun 15;43(12):2764-2767. doi: 10.1364/OL.43.002764.
Microwave absorber with broadband absorption and thin thickness is one of the main research interests in this field. A flexible ultrathin and broadband microwave absorber comprising multiwall carbon nanotubes, spherical carbonyl iron, and silicone rubber is fabricated in a newly proposed pyramidal spatial periodic structure (SPS). The SPS with equivalent thickness of 3.73 mm covers the -10 dB and -15 dB absorption bandwidth in the frequency range 2-40 GHz and 10-40 GHz, respectively. The excellent absorption performance is achieved by concentration and dissipation of the electromagnetic field inside different parts of the magnetic-dielectric lossy protrusions in different frequency ranges.
具有宽带吸收和薄厚度的微波吸收体是该领域的主要研究热点之一。本文提出了一种新的金字塔型空间周期性结构（SPS），制备了一种由多壁碳纳米管、球形羰基铁和硅橡胶组成的柔性超薄宽带微波吸收体。等效厚度为 3.73mm 的 SPS 在 2-40GHz 和 10-40GHz 频率范围内的-10dB 和-15dB 吸收带宽分别为 2-40GHz 和 10-40GHz。在不同频率范围内，通过在不同磁电损耗凸起部分集中和耗散电磁场，实现了优异的吸收性能。
