A miniaturized metamaterial absorber (MA) based on 3-D resonant structures is presented. The absorber exhibits near-unity absorption (>99%) at 2.08 GHz, thanks to the long electric length of the folded metal plate. The proposed structure has a unit cell size of 7 mm ×\times 7 mm, which gives a ratio between periodicity and resonance wavelength of 1/20.6. Moreover, the proposed structure maintains absorption above 90% with incident angle reaching up to 60° and 70° for TE and TM polarizations, respectively. The stereo resonator and dielectric substrate included in this absorber are fabricated with the aid of the multimaterial hybrid microdroplet jetting modeling (MHMJM) technique. The measured absorption spectrum agrees closely with the simulations.

中文翻译：

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具有广角稳定性的小型化 3D 超材料吸收器


提出了一种基于 3D 谐振结构的小型化超材料吸收器 (MA)。由于折叠金属板的电长度较长，吸收器在 2.08 GHz 下表现出近乎均匀的吸收 (>99%)。所提出的结构的晶胞尺寸为 7 mm ×\× 7 mm，其周期性与谐振波长之间的比率为 1/20.6。此外，所提出的结构将吸收率保持在90%以上，TE和TM偏振的入射角分别达到60°和70°。该吸收器中包含的立体声谐振器和介电基板是借助多材料混合微滴喷射建模（MHMJM）技术制造的。测量的吸收光谱与模拟结果非常吻合。