An efficient technique based on the Fast Fourier Transform (FFT) for calculating near-field scattering by dielectric objects in layered media is presented. A higher or-der method of moments technique is employed to solve the volume integral equation for the unknown induced volume current density. Afterwards, the scattered electric field can be easily computed at a regular rectangular grid on any horizontal plane us-ing a 2-dimensional FFT. This approach provides significant speedup in the near-field calculation in comparison to a straightforward numerical evaluation of the ra-diation integral since it eliminates the very time-consuming computations of the dy-adic Green’s functions for layered media.
5th International Conference on Antenna Theory and Techniques, 2005, p. 427-429
nearfield; FFT; method of moments; volume integral equation; electromagnetic scattering; higher-order hierar-chical basis functions
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5th International Conference on Antenna Theory and Techniques, 2005