Application of the high-order symplectic FDTD scheme to the curved three-dimensional perfectly conducting objects

作者：Sha, Wei E. I.^*; Wu, Xianliang; Chen, Mingsheng; Huang, Zhixiang

来源：Microwave and Optical Technology Letters, 2007, 49(4): 931-934.

DOI：10.1002/mop.22306

• symplectic integrator
• curved conducting surfaces
• diagonal split-cell model
• high-order difference
• radar cross section

A high-order symplectic finite-difference time-domain (SFDTD) scheme using the diagonal split-cell model is presented to analyze electromagnetic scattering of the curved three-dimensional perfectly conducting objects. On the one hand, for the undistorted cells, the fourth-order accurate spatial difference is employed. 017 the other hand, for the completely distorted cells, the treatment of the curved surfaces is based on the diagonal split-cell model. Finally, for the partially distorted cells, the interpolation strategy is proposed to keep the field components continuous. The numerical experiments suggest that the diagonal SFDTD scheme con obtain more accurate results than both the staircased SFDTD scheme and the traditional diagonal FDTD method. Furthermore, in view of the high numerical stability, the improved symplectic scheme does not need to decrease time increment to comply with the stability criterion.

• 出版日期2007-4
• 单位安徽大学