“…Time marching (TM) is a common approach used for simulating this kind of systems, which is present in (1) the finite‐difference time‐domain (FDTD) method (eg, previous studies), (2) the Baum‐Liu‐Tesche equations in time domain for a 2‐port case (eg, Tesche), and (3) solving the time‐domain counterparts of multiport network parameters (eg, previous studies).…”