Analysis of Radar Target Scattering Echo With Surface Ducting in Large-Scale Environments Based on the PE-MoM Hybrid Method

This letter proposes a 3-D parabolic equation-method of moments (PE-MoM) hybrid method to predict radar target scattering with surface ducting in large-scale environments. The method divides the complex multiscale problem into two subproblems: electromagnetic (EM) wave propagation and scattering. The bidirectional 3-D parabolic equation method is used to consider the influence of environmental factors, such as irregular terrain and atmospheric duct on EM wave propagation, whereas the method of moments (MoM) is used to calculate the scattering from the key target. By introducing phase compensation and Fourier synthesis techniques, the proposed method can be extended to predict transient scattering echoes from the target. A typical example is given to verify the correctness of the proposed method, and good consistency is also seen from comparison with the MoM. Finally, simulation analysis is carried out for the scattering of a missile target in a sea-land composite environment. The results show that the proposed method can effectively predict the scattering echoes of low-altitude targets in large-scale environments.