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首页> 外文会议>2014 IEEE International Conference on Communication Problem-Solving >Microwave metamaterial absorber with nλ0/2 dielectric thicknesses
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Microwave metamaterial absorber with nλ0/2 dielectric thicknesses

机译：nλ 0 / 2介电层厚度的微波超材料吸收器

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Most of the metamaterial absorbers are thin planar configurations, of which the thicknesses of dielectric slabs are much smaller than 1/10 of the absorbing wavelength. On increasing the thicknesses of dielectric slabs in limited scales, the absorptions become poor. And the surface currents in metal resonators and ground planes are anti-parallel. In this paper, we theoretically demonstrate that, when thicken the dielectric slab of a conventional metamaterial absorber for nλ/2 (n=1, 2, ...), it can also achieve the near-unit absorption properties and the surface currents in metal resonator and ground plane are not associated any longer. Moreover, the electromagnetic wave energy can be completely absorbed by the metal resonators and the main function of ground plane is to reflect the incident EM waves back to the metal resonators. These findings can broaden the potential applications of the metamaterial absorbers in microwave and optics areas, especially in the invisible screens for large area objectives.
机译：大多数超材料吸收体是薄的平面结构，其电介质板的厚度远小于吸收波长的1/10。在以有限的比例增加电介质板的厚度时，吸收变差。金属谐振器和接地平面中的表面电流是反平行的。在理论上，我们证明了，当将常规超材料吸收器的介电平板增厚为nλ/ 2（n = 1，2，...）时，它还可以实现近单元吸收特性和表面电流。金属谐振器和接地层不再关联。此外，电磁波能量可以被金属谐振器完全吸收，接地平面的主要功能是将入射的EM波反射回金属谐振器。这些发现可以拓宽超材料吸收器在微波和光学领域的潜在应用，尤其是在用于大面积物镜的隐形屏幕中。

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