Design of combined-shaped metamaterial invisible cloak

Based on coordinate transformation, a combined-shaped metamaterial invisible cloak with the deduced electromagnetic tensors is designed. The results of simulation software based on finite element methods (FEM) are obtained on the condition that the wave origin is a transverse electric wave (TE wave) with a frequency of 200 MHz. The simulation results show that the invisible cloak can change the direction of the incoming wave, and that the wave can almost return to its original characteristics when it propagates away from the cloak. The field intensities of the free space outside the cloak stay almost invariant, with little scattering. The combined-shaped cloak is thus considered to be effective in causing objects to be invisible to electromagnetic waves.