In this work, the possibility of a switchable metamaterial absorber is proposed to control absorption bandwidth in the WiMAX/LTE (worldwide interoperability for microwave access/long term evolution) band, by taking advantage of the low cost and myriad structural configurations afforded by water-based metamaterials. By exploiting truncated cone-type resonators, the fractional bandwidth of 27.6% of absorption spectrum can be adjusted flexibly to be 7.4% of the narrow-band absorption depending on the volume of injected water, in both simulation and experiment at room temperature. In particular, this control method can be applied stably for different temperature of injected water. We describe a dynamic mechanism for broadband MA, as well as a principle for controlling the absorption characteristics utilizing a combination of magnetic resonance and perfect impedance matching. These results are a stepping-stone towards the realization of smart electronics integrated with multi-functional metamaterials in military, biomedical, communication and other fields.

中文翻译：

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基于水混合超材料的窄/宽带吸收

在这项工作中，有人提出了一种可切换的超材料吸收器的可能性，它可以利用水所提供的低成本和无数种结构配置来控制WiMAX / LTE（微波访问/长期演进的全球互操作性）频带中的吸收带宽，基础的超材料。通过利用截头圆锥形谐振器，在室温下的模拟和实验中，可以根据注入水量灵活地将吸收光谱的27.6％的分带宽调整为窄带吸收的7.4％。特别地，该控制方法可以稳定地应用于注入水的不同温度。我们描述了宽带MA的动态机制，以及结合磁共振和完美阻抗匹配来控制吸收特性的原理。这些结果是在军事，生物医学，通信和其他领域中实现与多功能超材料集成的智能电子的基石。