Centre for Optical and Electromagnetic Research, State Key Lab of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310058, China.
Sci Rep. 2013;3:2182. doi: 10.1038/srep02182.
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.
在过去的几年中，拟共形映射已被广泛用于设计宽带电磁隐身衣。然而，这种技术存在一些固有的实际限制，例如横向波束偏移，这使得设备可见或难以隐藏大型物体。在这项工作中，我们通过使用严格的共形映射来构建第一个各向同性隐身衣来规避这些问题。微波近场测量表明，我们的器件（介电常数在各处均大于 1）具有非常好的隐身性能和宽的频率响应。目前的介电方法可以在技术上扩展到更高频率下其他共形器件的制造。
