Adaptive sampling approach based on cubic-spline for fast monostatic RCS calculation

An adaptive sampling method is proposed in this paper to efficiently calculate the scattering from electrically large objects. This cubic-spline-based sampling method is developed by combining Hermite model and spline technique to approximate a C¹-continous curve through a set of arbitrarily discrete points, which adaptively generated by a coarse-to-fine strategy. Numerical results demonstrate that this method is able to rigorously approximate the result with less computation time when compared to the conventional numerical approximate methods.