WIRELESS CHARGING SYSTEM AND METHOD

A wireless charging system includes a hollow electromagnetic waveguide and a platform that, when placed inside the waveguide, positions one or more wireless devices to absorb energy from an electromagnetic field propagating along the waveguide. The system also includes first and second couplers located near opposite ends of the waveguide. The first coupler, when driven with an electrical signal, couples energy from the electrical signal into the electromagnetic field. At the same time, the second coupler couples energy from the electromagnetic field into an electrical receiving signal. The second coupler may be connected to a dissipative load to dissipate the energy of the electrical receiving signal. Alternatively, the electrical receiving signal can be processed to power the wireless charging system. The wireless charging system charges the wireless devices with high efficiency regardless of their positions inside the waveguide, thereby ensuring that the wireless devices charge at a similar rate.