Study on wide-band scattering from rectangular cross-section above rough land surface with exponential type distribution using FDTD

Abstract

The dielectric property of the actual land surface is expressed using the four-component model of dielectric constant of soil, the actual rough land surface is simulated with model of exponential type distribution rough surface and Monte Carlo method, the wide-band electromagnetic scattering from column with rectangular cross-section above rough land surface under Gaussian differential pulse irradiation is studied using FDTD, the curves of frequency distribution of back composite scattering coefficient is obtained, the back composite scattering coefficient varying with the root-mean-square of height fluctuation, the correlation length of rough land surface, the moisture capacity of soil, the geometric parameter of the target, such as height, size, tilt and dielectric parameter of the target is calculated in details, the characteristics of the wide-band composite scattering from object above rough land surface with exponential type distribution are obtained.