cable is deeply attenuated within few meters and its power is radiated instead of being conducted. Hence, it is important in PLC to study how both CM and DM propagate throughout the network, and how different mechanisms lead to CM-DM or DM-CM conversion, which eventually deeply influence the attenuation and the distortion of the communication signals.

Radiation model for a two-wire transmission line {#sec:mtrl}
------------------------------------------------

Following the results of the previous section, we herein extend the classical MTL PUL equivalent circuit [@Paul:2007:AMT:1554645] for a 3-wire cable to include also the equivalent radiation resistances.

shows a line section of four conductors of length $dx$, where $r_i, l_i, c_i, g_i$ denote the PUL resistance, conductance, and capacitance of cable $i$. The mutual inductance, capacitance and conductance take into account the mutual interactions between conductors. The bottom conductor is assumed to model a reference conductor, while the other three conductors represent the wires (i.e. Neutral, Phase and Protective Earth) that constitute the power line. We assume the ground, which normally has finite resistance, to be the reference conductor. With this model it is not only possible to analyze the differential transmission between two of the three conductors, but also to analyze the common 