“…This article presents a TL equation for current propagation along a thin and straight wire of perfect conductance without a return current path. The model is oriented for design and synthesis of EM phenomena, with clear descriptions of propagation along the line, radiation losses, and responses to external EM environments [26]. To integrate radiation losses in the TL dynamics of wave propagation along the line, it is rational to start with the principal wave, which is the only possible mode (independent of the external EM fields) in an infinite-length single conductor.…”