摘要
提出了一种新型归一化的Z变换FDTD算法(ZTFDTD).ZTFDTD采用DH模式,根据DE的频变关系式,利用Z变换形成D-E-H-D迭代模式,将这种方法用于电磁波与非磁化等离子体的仿真,通过二维模型分别仿真了在不同等离子体自由电子密度分布,不同电磁波频率和不同等离子体碰撞频率下,不均匀非磁化等离子体对电磁波的吸收衰减.数值结果表明,等离子体隐身在理论上是有效可行的,合理地设置等离子体参数,可以极大地增强等离子体隐身效果.
A novel and normalized Z-transforms finite-difference time-domain （ZTFDTD）method is presented, in which a more general form of Maxwell＇s equations using the E, H, D fields was employed. The iterative model of D-E-H-D was obtained by using the Z-Transform resulted frequency- dependent formula between D and E. ZTFDTD method is discrete and simple, whose results are precise, easy to program and h to deal with the key technologies of FDTD, such as absorbing boundary conditions （UPML）, near-to-far-field transformation. Thus, this method was used to simulate the interaction of electromagnetic wave with plasma. The stealth effect of inhomogeneous, unmagnetized plasma was studied using a simplified two-dimension mode both in different electron density of plasma, different electromagnetic wave frequencies and different plasma collision frequencies. Numerical results indicate that plasma stealth is effective theoretically, and reasonable selection with the plasma parameters can selected reasonably to enhance the effectiveness of plasma stealth remarkably.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2007年第6期57-59,共3页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金重点研究计划资助项目(90405004)
高等学校博士学科点专项科研基金资助项目(20060487041)
