Abstract: A wireless charger for charging an electric device includes an emitting device and a receiving device. The emitting device generates microwaves and the receiving device receives the microwaves from the emitting device and transforms the microwaves into electrical power. The receiving device includes a receiving antenna receiving the microwaves from the emitting device, an impedance matching circuit electrically connected to the receiving antenna, a voltage doubler rectifier filter circuit electrically connected to the impedance matching circuit, and a boost module electrically connected to the voltage doubler rectifier filter circuit. The receiving antenna has a small signal reflection and a small power loss in receiving the microwaves; the impedance matching circuit works with the voltage doubler rectifier filter circuit to provide a small power loss when the microwaves are transformed into the electrical power to directly or indirectly charge the electric device with a high voltage.

Abstract: An embodiment of the present invention discloses a power saving outlet system and a method for controlling thereof. The power saving outlet system includes a main outlet, at least one auxiliary outlet, a current detection unit, and a control unit. The current detection unit generates a current detection signal according to an operational current of the main device. And the control unit determines if the current detection signal is smaller than the threshold value to selectively cause an electrical power to be delivered from the external power source to the auxiliary device.