【摘要】 给出了一种新的计算各向异性磁化色散介质的有限差分(FDTD)算法,称为移位算子FDTD(SO-FDTD)算法,它利用算子之间的移位递推关系,将一类色散介质的包含介电常数的表达式写成有理分式函数形式,进而导出FDTD中一系列相关量之间的关系.通过计算各向异性等离子体平板对电磁波的反射系数和透射系数,验证了该算法的高效性和高精度,与JEC算法相比,可使计算效率提高数倍.更多还原

【Abstract】 A novel finite-difference time-domain(FDTD)method,called shift operator FDTD(SO-FDTD)method is developed for anisotropic magnetized dispersive media.The recursive relation between operators is used.In this paper,some expressions containing the dielectric constants of magnetized dispersive media are written as rational polynomial function.The SO-FDTD formulation for anisotropic magnetized plasma is derived.The high efficiency and effectiveness of the method are confirmed by computing the reflection and transmission through a magnetized plasma layer,with the direction of the propagation parallel to the direction of the biasing field.A comparison with frequency domain analytic results is included.The CPU time was several times shorter than that of the JEC method.更多还原