Fast numerical simulations of electromagnetic scattering from one-dimensional rough surface over a frequency band

摘要

To fast calculate the backscattering coefficient from a one-dimensional rough surface over a frequency band, the asymptotic waveform evaluation (AWE) technique is introduced in this paper. The tapered plane wave is chosen as the incident wave to avoid the artificial edge diffraction due to the finite length of the simulated rough surface. The Pierson-Moskowitz (PM) spectrum ocean rough surface is applied to simulate the realistic rough surface. Good agreements between the AWE and the exact results obtained by the method of moment (MoM) are exhibited. And the AWE is more effective in computing time over a frequency band.