We propose a dual-band metamaterial absorber (MA) based on a stereo resonant structure. The unit cell of the proposed MA is composed of double metallic rings with a rampart on each ring into a dielectric substrate. In contrast to the conventional plane resonator, our proposed metamaterial exhibits wider incident angle stability. The power loss density distribution shows that the standing ramparts play a key role in enhancing the electromagnetic wave absorption. Experimental results verify the wide-incident-angle stability of the absorber. Our proposed strategy paves a new way on developing MAs with wide incident angle stabilities.

中文翻译：

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基于3D垒的双波段超材料吸收器，具有宽入射角稳定性

我们提出了一种基于立体声共振结构的双频超材料吸收器（MA）。提出的MA的晶胞由双金属环组成，每个环上都有一个壁垒，进入电介质基板。与传统的平面谐振器相比，我们提出的超材料表现出更宽的入射角稳定性。功率损耗密度分布表明，竖立壁垒在增强电磁波吸收方面起着关键作用。实验结果证明了吸收体的宽入射角稳定性。我们提出的策略为开发具有宽入射角稳定性的MA铺平了新途径。