Abstract
In this study, a wireless power transmission system supporting multiple users was built based on a power pilot. The power pilot transmits the authorization and power status information of the user to the power station. The power station first transmits power to the user in the lowest power state for the longest time. A code-division multiple access system was used for supporting multiple receiving users and a non-uniform time-division multiple access system, which allocates power charging time differently to each user, was employed. Consequently, power was transmitted according to the power priority of multiple users. Finally, the power efficiency of the retrodirective array antenna system based on a phase-locked loop was increased by conjugating the phase of the power pilot received from the user and transmitting it to the user. We designed these three systems and verified their performance through simulations to build a wireless power transmission system that supports multiple users.
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