Research on the Composite Electromagnetic Scattering from Soil Surface and Combinatorial Target Placed on It

Dobson semi-empirical model and dielectric complex permittivity formula are used to represent the real and imaginary parts of the soil dielectric constant, the soil surface is simulated with the model of exponential distribution and Monte Carlo Method, the composite scattering of soil surface and combinatorial target placed on it is studied by the finite difference time domain method, the angular distribution curve of the composite scattering coefficient is obtained. The results show that the composite scattering coefficient oscillates with the scattering angle, and the scattering enhancement effect occurs in the mirror reflection direction. The influence of the root mean square and the correlation length on the fluctuation of soil surface, the soil moisture content, the scale and dielectric constant of combinatorial target on composite scattering coefficient is complex.