  The steady-state electronic transport across periodically driven systems can
be efficiently addressed using Landauer-B\"{u}ttiker formalism. The
time-dependent nonequilibrium Green's function theory then may be adapted for
developing direct and universal calculation schemes. Here we propose an
alternative scheme to carry out the calculations. The idea is based on treating
the transport problem in frequency domain and designing Green's functions for
the corresponding Hamiltonians rewritten in Floquet-Sambe formalism. We show
that within our approach the expressions for time-periodic currents and
densities essentially replicate the well known formulas from time-independent
theory. The results are then simplified for easier implementation in numeric
computations.
