Wireless microwave power transmission from Earth to the high-altitude-platforms global radio relays
Wireless power transmission (WPT) represents a promising direction in engineering that is associated, first of all, with the use of radio-physical techniques. WPT is based on a double-step conversion of electric power: first, dc energy is converted into microwave field energy that is transmitted as a wave beam to a rectenna, and then the microwave field energy is converted back into dc energy. WPT systems are of interest for power transmission from ground-based sources of energy to air-based objects such as high-altitude platforms (HAPs) of radio relays, as well as to inaccessible terrestrial objects. WPT systems have no alternative as a means for electric power transportation from space solar stations (SPSs) to Earth.