Microwave power transmission demonstration system design for Space Solar Power Station

Microwave power transmission (MPT) is one of the key technologies in Space Solar Power Station (SSPS). The state-of-the-art researches and validations only focus on individual technology but lack of comprehensive optimization for SSPS system. According to the operating mode of SSPS, a demonstration system was proposed to validate microwave power transmission in SSPS. The transmitting antenna array and rectenna array were designed by using integrated processing with approximate Gaussian field distribution in transmitting antenna array and low reflection design in rectenna array. The beam control method in the system was based on direction of arrival estimation by sending pilot signal and beam synthesis by controlling the phase shifters in the transmitting antenna array. The analyzed beam collecting efficiency of demonstration system is 94.2%, about 17.6% higher than the traditional uniform distribution system. The demonstration system comprehensively simulates the MPT of SSPS in several ways, including system scale minification, transmitting antenna field distribution, etc., power density and beam controlling and it can be the promotion of SSPS development.