fast and simple design of a circular carpet cloak using conformal mapping and optimizing it with pso algorithm

controlling the electromagnetic waves propagation using optical transformation is a topic that finds many applications in recent years. one of the most important applications of these transformations is hiding the objects from radar waves, i.e. cloaking. hiding under the carpet or carpet cloak is a special type of cloaking that hides the objects situated between a metal sheet and the ground. in this paper we propose a simple way to design a carpet cloak for a circular sheet. the main advantage of this method is its simplicity and using closed form transformer. also a new method named “modified hausdorff distance” is proposed to analyze, compare and check the similarity of the backscattered waves. finally a carpet cloak structure is proposed to hide a hangar with the help of pso algorithm to achieve optimal dimensions. simulations are based on finite difference time domain (fdtd) method using matlab software in the frequency range of 50mhz to 2ghz and the results are acceptable.