Bandwidth performance of a simplified cloak realized by non-magnetic dielectric cylinders

A design for broadband scattering reduction of metallic objects based on non-magnetic dielectric cylinders is proposed, and their bandwidth performance is examined. The devices are functional in the presence of a ground plane as well as directionally in free space between 4–10 GHz. The required all-dielectric permittivity distribution for the cloak is achieved by manipulating the dimensions of periodically distributed dielectric cylinders embedded in the host medium with a permittivity close to one. The validity of the scattering reduction is shown through simulation results. The proposed all dielectric cloaks are advantageous over other schemes due to their nature of broad bandwidth, low loss and ease of fabrication.