The transient invisibility cloak in the electro-quasi-static field

Abstract

Abstract The invisibility condition of cloak in the Electro-Quasi-Static (EQS) field under the arbitrary transient excitation is given in this paper. Firstly, because electric field with magnetoelectric effect ignored can be attributed to the EQS field which is the transient electric field. In this case, the analytical invisibility conditions of infinite length coaxial cylinders cloaks under arbitrary transient excitation are derived in the EQS field. Then, by the finite element method(FEM) simulation, the correctness of the analytical invisibility condition is verified. Besides, this paper also established the equivalent circuit model for the cloak in the EQS field by the resistance and capacitance network. At last, analytical invisibility conditions of the concentric spheres cloak are also given. By the invisibility conditions proposed in this paper, the cloak could achieve stealth under the transient electric field which will greatly enhance the performance of the cloak.