Fig 5(b) shows the common mode input impedance of
a branch within a typical LV automotive harness. It starts
at ∼16 Ω, showing an inductive impedance increase up to
∼8 MHz. In the higher frequency range between 10–200 MHz,
the input impedance shows multiple resonances, which occur
irregularly over frequency. The input impedances lie within
a region of ZIn,LV = 65–1000 Ω or spread 20 lg(1000/65) =
23.7 dB. Fig. 5(c) shows the input impedance of an HV cable
with a characteristic impedance of ZL = 18.5 Ω, which is terminated
with a LISN. Below 2 MHz, the impedance curve follows
the cable termination; hence the transmission line behavior is
not yet dominant. Above 10 MHz, regular line resonances can
be observed caused by the termination mismatch. The input
impedance of the HV cable differs between ZIn,HV = 3.8–80 Ω
(26.4 dB). Compared to LV automotive networks, HV cables