English: Generic block diagram of a wireless power system that works by capacitive coupling. It consists of a transmitter unit (left) that transmits power to a receiver unit (right). The transmitter consists of an electronic oscillator that drives two capacitor plates (C) 180° out of phase with a high frequency voltage. The alternating potential on the lefthand transmitter capacitor plates creates oscillating electric fields (E, red) that induce alternating potentials on the righthand receiver capacitor plates by electrostatic induction. The potentials drive current back and forth through the rectifier which rectifies it to a direct current which powers the load.