A modified high-order FDTD conformal technique for modeling perfectly conducting objects

In this paper, we have proposed a new high-order conformal method, in which we use two integral loops of Faraday´s law to update H-field. We observe that the proposed method has low numerical dispersion error, and it can use large space cells so as to reduce the computer memory required. Using this modified method, numerical computations are performed to predict the RCS of a PEC object as well as the shielding effectiveness of a metallic enclosure, with good agreements achieved but with less computer memory required.