“…So far, many impedance extractors have been developed for the structures discretized by filaments [45,53], tetrahedra [51], or surface panels [42]. Recently, the FFT-PEEC technique [48,103] was proposed for impedance extraction of voxelized structures. The technique uses vector face shape functions and piecewise constant basis functions to discretize the currents and charges inside the voxelized structure, respectively.…”