Study On Symplectic Finite-difference Time-domain Scheme For Plasma Media

For computational electromagnetics,finite-difference timedomain(FDTD)algorithm is one of the most classic calculation method.FDTD for the plasma medium environment,the numerical stability will be affected,Symplectic time domain finite difference method(SFDTD)can be a perfect solution to this problem.In this paper,we construct the SFDTD algorithm for dispersive plasma media based on symplectic integral operator decomposition,The detailed iterative formula and numerical stability condition and numerical dispersion relation and numerical dissipation of the SFDTD method in the dispersion plasma medium are deduced,and the SFDTD method is used to simulate the propagation characteristics of the simulated electromagnetic wave in the dispersion plasma medium.Simulation of the propagation characteristics of electromagnetic wave in dispersive plasma The numerical stability condition and dispersion relation will be shown in this paper,the reflection coefficient and the transmission coefficient of the electromagnetic wave propagating in the plasma medium will be simulated by the SFDTD algorithm,and to verify the validity and efficiency of the SFDTD algorithm.SFDTD will be compared with other FDTD algorithms,such as the Runge-Kutta time-domain finite difference(RKETD-FDTD),This comparison diagram proves that SFDTD has higher accuracy and efficiency than other algorithms.In this paper will give some numerical examples,numerical results test and verify that the main conclusions in this paper.The SFDTD will be applied to practical applications,such as The horizontal polarization(HH)and vertical polarization(VV)double-station radar cross section(RCS)of anisotropic magnetized plasma-covered metal conductor are calculated.