Experiments on high-performance beam-scanning antennas made of gradient-index metamaterials
Experiments on high-performance beam-scanning antennas made of gradient-index metamaterials
复制标题
梯度折射率超材料高性能波束扫描天线实验
DOI：
10.1063/1.3223608
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发表时间：
2009-08-31
影响因子：
4
通讯作者：
Cui, Tie Jun
中科院分区：
文献类型：
--
作者：
Ma, Hui Feng;Chen, Xi;Cui, Tie Jun
由梯度折射率超材料制成的平面透镜可以将柱面波转换为平面波，并且通过调节透镜的折射率分布来控制平面波的光束方向。基于这些特性，我们通过实验提出了使用梯度折射率平面透镜和喇叭天线的高性能波束扫描天线。透镜采用超材料精心设计，实现不同的折射率和良好的阻抗匹配。使用二维近场微波扫描仪测量了天线的近场分布，并给出了辐射方向图，显示出高方向性和低旁瓣。
A planar lens made of gradient index metamaterials can transform cylindrical waves to plane waves, and the beam direction of plane waves is controlled by adjusting the refractive-index distributions of the lens. Based on such properties, we present high-performance beam-scanning antennas experimentally using the gradient-index planar lens and horn antenna. The lens is carefully designed with metamaterials to achieve different refractive indices and good matching of impedance. The near-field distributions of antennas are measured using a two-dimensional near-field microwave scanning apparatus, and the radiation patterns are presented to show the high directivity and low sidelobe.