Ultra-wideband and Polarization-Insensitive Perfect Absorber Using Multilayer Metamaterials, Lumped Resistors, and Strong Coupling Effects oleh Si-Jia Li, Peng-Xin Wu, He-Xiu Xu, Yu-Long Zhou, Xiang-Yu Cao, Jiang-Feng Han, Chen Zhang, Huan-Huan Yang, Zhao Zhang