题目

英语翻译
a 6-cm-diameter metal cylindrical scatterer in free space is modeled.The source excitation is a Gaussian pulse with a carrier frequency of 5 GHz.The grid resolution (dx = 3 mm) was chosen to provide 20 samples per wavelength at the center frequency of the pulse (which in turn provides approximately 10 samples per wavelength at the high end of the excitation spectrum,around 10 GHz).The computational domain is truncated using the perfectly matched layer (PML) absorbing boundary conditions.

提问时间：2020-08-07

答案

在自由空间内,为一直径为6厘米的金属桶状粒子散射器建模.激励源为高斯脉冲,其产生的带电粒子频率为5兆赫.将网格分辨率选择为DX＝3,这样可以在脉冲中心频率处每一波长中取得20个标本（同时,在激发光谱的高频端,每一波长可提供10个标本,此处频率大约为10兆赫）.计算区域限定在理想匹配层（PML）确定的吸收边界之内.