title: Far field free-space measurement of three dimensional hole -in -Teflon invisibility cloak.
abstract: 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.
authors.affiliation: Center for Superconducting and Magnetic Materials, Department of Physics, National University of Singapore, Singapore 117524, Singapore. g0900743@nus.edu.sg
authors.forename: Ning
authors.initials: N
authors.lastname: Wang
authors.forename: Yungui
authors.initials: Y
authors.lastname: Ma
authors.forename: Ruifeng
authors.initials: R
authors.lastname: Huang
authors.forename: C K
authors.initials: CK
authors.lastname: Ong