First experimental demonstration of an isotropic electromagnetic cloak with strict conformal mapping.

First experimental demonstration of an isotropic electromagnetic cloak with strict conformal mapping.
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具有严格共形映射的各向同性电磁斗篷的首次实验演示

DOI:
10.1038/srep02182
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发表时间:
2013
期刊:
影响因子:
4.6
通讯作者:
He, Sailing
He, Sailing
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Ma, Yungui;Liu, Yichao;Lan, Lu;Wu, Tiantian;Jiang, Wei;Ong, C. K.;He, Sailing

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近年来,准保角映射被广泛用于宽带电磁隐身衣的设计。然而,这种技术有一些固有的实际限制,例如横向光束偏移,使设备可见或难以隐藏大物体。在这项工作中,我们绕过这些问题,使用严格的保角映射,建立第一个各向同性斗篷。微波近场测量表明,该器件(介电常数处处大于1)具有很好的隐身性能和较宽的频率响应。目前的电介质方法可以在技术上扩展到在更高的频率下的其他共形器件的制造。
In the past years quasi-conformal mapping has been generally used to design broadband electromagnetic cloaks. However, this technique has some inherit practical limitations such as the lateral beam shift, rendering the device visible or difficult to hide a large object. In this work we circumvent these issues by using strict conformal mapping to build the first isotropic cloak. Microwave near-field measurement shows that our device (with dielectric constant larger than unity everywhere) has a very good cloaking performance and a broad frequency response. The present dielectric approach could be technically extended to the fabrication of other conformal devices at higher frequencies.
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