A multilayer metamaterial absorber (MMA) with optically transparent and broadband microwave absorption characteristics based on Indium Tin Oxide (ITO) and polymethyl methacrylate (PMMA) was designed and fabricated. The microwave absorption properties can be regulated by the resistance of ITO and the structural parameters of the unit cell. In the frequency range of 2.64–18 GHz, more than 90 % microwave absorption can be achieved. The microwave attenuation mechanism was investigated through equivalent electromagnetic parameters, impedance matching, electric and magnetic field distribution, power loss density and layer electric current at special frequencies. The microwave absorption performance at different incident angles under TE and TM polarization models was investigated to explore the angle-sensitive properties. The average transmittance of the absorber in the visible light wavelength range (400–800 nm) was also measured. The experimental and simulated microwave absorption rates are in accordance, indicating the potential application of the proposed absorber in the field of transparent microwave absorption.

基于氧化铟锡的具有光学透明和宽带微波吸收特性的多层超材料吸收体（MMA ）ITO) 和聚甲基丙烯酸甲酯 (PMMA) 被设计和制造。微波吸收性能可以通过ITO的电阻和晶胞的结构参数来调节。在 2.64-18 GHz 的频率范围内，可以实现 90% 以上的微波吸收。通过等效电磁参数、阻抗匹配、电场和磁场分布、功率损耗密度和特殊频率下的层电流来研究微波衰减机制。研究了 TE 和 TM 偏振模型下不同入射角的微波吸收性能，以探索角度敏感特性。还测量了吸收剂在可见光波长范围（400-800 nm）内的平均透射率。