A system and method for recharging a plug-in hybrid vehicle. Therefore, even when an antenna ratio is high, a gate oxide film in the first and second MOS transistors is not damaged during the plasma process. The barrel has a polygonal cross-sectional shape transversely to the longitudinal axis along the barrel. The dielectric antenna extends from an edge of the circuit board toward and along the rear window. To provide appropriate contact points, the projectile either carries contact wires or is designed to open and emit the liquid upon impact.