Equation (97) together with (73) leads to conclusion that in case of mismatching of generator’s output resistance, RG, is not equal to load resistance, RL, there is no way to equalize U1 and U2. Moreover it is impossible to satisfy the optimal condition by (59) because U is proportional to distance, d, between the coils, as (98). Consequently to apply such a system to wireless power transfer it should be guaranted that generator’s resistance is equal to the load one and operation occurs only for one predetermined distance. Otherwise, only semi-optimal operation is possible.