Preliminary Results and Analysis of Microwave Power Transmission System for SSPS

A microwave power transmission demonstration system for SSPS (Space Solar Power Station) is proposed to comprehensively simulating the operating mode of SSPS. The main parts of the system are microwave power transmitting subsystem, rectenna subsystem, and beam control subsystem. The operating frequency of the demonstration system is chosen at 5.8 GHz. The transmitting antenna array with a aperture size of 1.2 m × 1.2 m is design based on phased array architecture. The power transmission distance is about 30 m and the size of rectenna array is about 2 m × 2 m. This paper presents the analysis of the power transmitting subsystem and the preliminary experimental results of the beam control subsystem. The simulated maximum power density at a distance of 30 m can be 15 mW/cm
²
. The measured accuracies of angle measurement and beam control are 0.1º and 0.23 º, respectively.