An invisibility cloak design at microwave frequency using commonly used materials

In this work, we present a novel cloaking structure designed at microwave frequency. Different from the cloaking structures in need of effectively negative refractive index medium, such a structure is composed of a regular dielectric medium and metallic cylinders array. From the numerical simulation, we may observe that the cloaking outside a metallic cylinder can mold the propagation of energy flow, reducing the backward scattering of the incident wave.