Long range, safe power transmission using iteratively-tuned rectification

A long range wireless power system operating at 2.45 GHz is developed. The system is comprised of: 1) high gain horn antennas, 2) iteratively tuned matching/filtering network, 3) high efficiency rectifier, and 4) optimized load. An iterative technique is then used to match the antenna to the rectifier to greatly improve the efficiency. The rectifier is built around a single shunt diode rectifier topology. The output of the rectifier is fed to an optimized load, producing efficiency above 45% at 0 dBm. The overall system is able to operate across half a meter wirelessly.