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Modified FDTD near-to-far-field transformation for improved backscattering calculation of strongly forward-scattering objects

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3 Author(s)
Li, Xu ; Dept. of Biomed. Eng., Northwestern Univ., Evanston, IL, USA ; Taflove, Allen ; Backman, Vadim

We propose a simple yet effective modification to significantly improve the accuracy of the finite-difference time-domain (FDTD) near-to-far-field (NTFF) transformation for calculating the backscattering of objects having strong forward-scattering lobes. In the modified approach, we merely omit integrating over the near-field plane located in the forward-scattering region. We validate the proposed approach via comparison with rigorous analytical solutions of plane waves scattered by single and multiple dielectric spheres.

Published in:

Antennas and Wireless Propagation Letters, IEEE  (Volume:4 )