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A hybrid KA-MoM method for scattering from dielectric target above a dielectric rough surface

By combining Kirchhoff approximation (KA) with the method of moment (MOM), a hybrid method is proposed to solve the scattering problem of a dielectric target above a dielectric rough surface. The field on the rough surface can be represented by the tapered incident wave and the scattering field of the target as the secondary incident wave using Kirchhoff approximation. Then, the electric field integral equations of the induced current and magnetic current on the target are derived to solve the problem. The field of the rough surface can be directly obtained by the tapered incident wave and the current and magnetic current on the target surface. Therefore, compared with the traditional method of moments, the hybrid algorithm only needs to solve the electric field integral equation of the target. The simulation of bistatic scattering from a cylindrical target on a Gaussian rough surface is carried out, and the effectiveness and effectiveness of the method are verified.