Homogeneous anisotropic dielectric invisibility carpet cloak made of Al2O3 plates

Abstract

In this paper, we report the fabrication of a homogeneous anisotropic invisibility carpet cloak that works for transverse magnetic (TM) wave in free space. Linear coordinate transformation is employed for the design of the dielectric tensors, and the cloak is made of Al2O3 slabs with a Teflon background. The triangular invisible region has a height of 32.4 mm (one third of the height of the whole device) and a width of 200 mm. The cloaking effect is examined in far-field free-space transmission experiments by measuring the scattering parameters. The results show our device has very good cloaking performance in a wide frequency range from 8 to 12 GHz. © Copyright EPLA, 2013.