The simulation of electromagnetic scattering from a cluster of needles based on filtered coupled-dipole approximation

The electromagnetic scattering of a cluster of needles based on filtered coupled-dipole approximation (FCD) is studied in this paper. This computational method is deriving from the Discrete Dipole Approximation (DDA) algorithm, which can improve the performance of standard DDA algorithm based on the sampling theory. In this study, the backscattering and bistatic scattering cross sections of a cluster of needles simulated by FCD algorithm are compared with the results obtained by standard DDA algorithm, and the accuracy of the new method is assessed by simulation results. In addition, we discuss the errors of the FCD and standard DDA algorithms generated in different relative permittivity. The simulations demonstrate that the FCD can achieve a higher accuracy than the standard DDA, even for high-permittivity scatterers.