optimum drive has the resonance frequency of a resonator of a radiofrequency ignition.

The invention relates to a device for supplying a radiofrequency ignition, comprising a supply circuit (2, 2 ') configured to apply an output connected to a resonator (1) plasma generation, a supply voltage at a frequency defined by a control signal (V1) supplied by a control device (5) of the supply circuit, characterized in that the control device comprises: - an interface (52) for receiving a query determining an optimum drive frequency, - an interface (51) for receiving measurement signals from the voltage across a capacitance (Cb) of the feed circuit (2), - a module (53) for determining the optimal control frequency, configured to provide successively different frequencies command to the power supply circuit for successive ignition commands upon receipt of a request and to determine an optimal driving frequency based measuring signals received.