Study Of Electromagnetic Scattering Of Plasma

Finite-Difference Time-Domain (FDTD) Method has applied to many different fields of electromagnetic problems such as radiation, scattering, electromagnetic compatibility etc. Compared with other numerical methods, FDTD is superior in dealing with the problems where the involved objects have complex shape or complex material. This paper deals with plasma electromagnetic scattering based on the research of FDTD method.This paper simulates the electromagnetic wave propagation and scattering of one-dimensional medium with FDTD, proves the accuracy and intuition of FDTD in modeling propagation and scattering of electromagnetic wave. This paper discusses some problems of FDTD in the injection of incident electromagnetic wave into total field region for both time-harmonic and transient wave cases. It shows that the leakage in the steady state is less then the non-steady state case. The more grids are divided for one wavelength or for the pulse width, the less leakage it happens.The electromagnetic scattering of homogenous non-magnetized plasma is studied with SO-FDTD. The influence of plasma frequency, collision frequency, the frequency of incident electromagnetic wave on the reflection and transmission coefficient, the attenuation index of plasma, penetration depth of electromagnetic wave in plasma is analyzed.The electromagnetic scattering of homogeneous magnetized plasma and infinite metal plate covered with magnetized plasma is studied with ADE-FDTD. The influence of plasma frequency, collision frequency, cyclotron frequency of electrons (external magnetic field) on the RCS, and the influence of inhomogeneous distribution of magnetized plasma electron density (frequency) on the RCS is also analyzed.The electromagnetic scattering of infinite metal plate covered with homogenous and inhomogeneous non-magnetized plasma is studied. The influence of plasma frequency, collision frequency, distribution of electron density (frequency) on the RCS is analyzed. The RCS of two-dimensional metal covered with plasma is studied. The influence of plasma frequency, collision frequency on the RCS and the influence of exhaust plume on the RCS of rocket is also analyzed.