A new hybrid technique for handling fine features in FDTD and its application to body-centric communications

In this work the authors introduce a novel approach to multi-scale type problems as they pertain to the finite-difference-time-domain method. The approach is based on the dipole moment concept of small antennas/scatterers from which the quasi-static near fields can be obtained separately from the FDTD grid. It is shown that the FDTD algorithm can perform the analytic continuation, in the time domain, of the fields given that the quasi-static fields are updated on the Yee cell containing the object of interest.