An Efficient Computation of Scattering from Human Body Based on Rotational Symmetry and 2.5-D FEM

This paper proposes a 2.5-dimensional finite element method (2.5-D FEM) for computing human body scattering under plane-wave incidence from arbitrary directions. By modeling the body as a Body of Revolution (BoR) and applying azimuthal modal decomposition, the three-dimensional (3-D) problem is reduced to several independent two-dimensional (2-D) problems, significantly lowering computational cost while preserving key scattering features. The method provides an efficient tool for constructing human body scattering databases for wireless sensing and communication applications.