In this work, a metamaterial perfect absorber (MPA) in the microwave region is numerically and experimentally demonstrated based on the near-field coupling of resonators. By decreasing the distance between split-ring resonators (SRRs), the coupling of SRRs is enhanced. Consequently, the original resonance of SRRs splits, leading to a multi-band perfect absorption. In addition, the proposed multi-band MPA is polarization-insensitive and can maintain the high absorption in a wide range of incident angle. Our work is expected to provide a different way to create the potential devices by using the multi-band and the broadband MPAs.

中文翻译：

---

多波段吸收体超材料近场耦合的处理

在这项工作中，基于谐振器的近场耦合，对微波区域的超材料完美吸收器 (MPA) 进行了数值和实验证明。通过减小裂环谐振器 (SRR) 之间的距离，增强了 SRR 的耦合。因此，SRR 的原始共振分裂，导致多波段完美吸收。此外，所提出的多波段 MPA 对偏振不敏感，可以在很宽的入射角范围内保持高吸收。我们的工作有望通过使用多频段和宽带 MPA 提供一种不同的方式来创建潜在设备。