A novel multiband metamaterial absorber (MTMA) is proposed which is capable of well presenting a polarization-insensitive and wide incident angle stability in the microwave frequency range. The proposed MTMA comprising two vertically stacked asterisk-based copper resonators separated by dielectric layer of flame retardant type four and backed with a thin copper film. High-frequency structure simulator was used to simulate the absorber and to depict surface current distribution. The results showed that the absorber is operated at three narrow bands with high absorptivity of about 92, 100 and 100% at frequencies of 2.75, 4.3 and 9.5 GHz, respectively. The position of the resonant peaks can be effectively tuned by adjusting the geometry parameters of the structure, thereby achieving a multiband, polarization-independent and wide-angle absorber. The designed structure is important for the application of sensors, thermal images and in constructing broad multiband signals for electromagnetic compatibility/interference.

中文翻译：

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通过结合双星号谐振器对极化不敏感和广角多波段超材料吸收器的电磁模拟

提出了一种新型的多波段超材料吸收器（MTMA），它能够在微波频率范围内很好地呈现偏振不敏感和宽入射角稳定性。拟议的 MTMA 包括两个垂直堆叠的星号铜谐振器，由四级阻燃电介质层隔开，并以薄铜膜为背衬。高频结构模拟器用于模拟吸收体并描绘表面电流分布。结果表明，吸收器工作在三个窄带，在 2.75、4.3 和 9.5 GHz 的频率下，吸收率分别约为 92%、100% 和 100%。通过调整结构的几何参数可以有效地调整谐振峰的位置，从而实现多波段、偏振无关和广角吸收体。