Medium-range wireless power transfer (WPT) can be realized in several different ways,e.g.by using inductive or capacitive coupling and resonant or non-resonant networks.This contribution focuses on a WPT link implemented by inductively coupled resonators.The case of a link using just two resonators (direct link) and operating at the main resonant frequency is investigated.It is shown that the operation at the main resonant frequency allows optimizing either efficiency or available power on the load,depending on the network parameterization.