Far field free-space measurement of three dimensional hole –in –Teflon invisibility cloak

作者：Ning Wang, Yungui Ma, Ruifeng Huang, C. K. Ong · 发表于：Optics Express · 年份：2013 · DOI：10.1364/oe.21.005941 · 被引用次数：16 · 研究领域：Metamaterials and Metasurfaces Applications、Advanced Antenna and Metasurface Technologies、Antenna Design and Analysis

In this paper, we report a fabrication of a three-dimensional (3D) carpet cloak that works for any polarization in free space. Two-dimensional (2D) conformal mapping is first employed and the 3D structure is generated by a rotation of the 2D cloak. The structure of the cloak is hole-in-dielectric. The triangular invisible region has a height of 36 mm (one third of the height of the whole device) and a width of 240 mm. The cloaking effect is examined in free space by measuring the scattering parameters. The results show our device has very good cloaking performance in a wide frequency range from 4 to 10 GHz.