Comparative study of high frequency techniques in radar cross-section (RCS) estimation

The paper studies and analyzes scattering by some of the shapes that are most used to model targets. From simple shapes, like cylinder and cone, to the conically capped cylinder, different techniques are used to analyze the scattering phenomena. Results obtained are compared over a wide range of frequencies and aspect angles. These techniques include geometrical theory of diffraction, individual scattering center method, and caustic correction method. Results are found to be in good agreement for most aspect angles. One can conclude that the RCS values obtained by the caustic correction and individual scattering center methods are closer as compared to GTD.