FDTD analysis of scattered fields from a moving conducting surface

摘要

The electromagnetic scattering from a moving conducting surface is analyzed by a numerical approach based on the finite-difference time-domain method. Relativistic boundary conditions are applied to solve the value of the electromagnetic field at the moving boundaries. However, different equations of relativistic boundary conditions should be chosen to calculate the electromagnetic fields at the moving surface by marching in time. Thus, the computation complexity is greatly increased. Then an accelerated method is proposed to simplify the computation in this paper. A one-dimensional uniformly moving conducting surface is considered. Time-domain scattered field from the moving conducting surface are simulated by the new numerical method proposed in the paper. Using fast Fourier transformation, frequency of scattered field is acquired. The numerical results of amplitude and frequency of scattered field from the moving conducting surface show good agreement with the theoretical results.