Design of Microwave Power Transmission System for Space Solar Power Station Demonstration

Based on the current technical approaches, a microwave power transmission demonstration system has been proposed to simulate the operating mode of MPT for the future Space Solar Power Station (SSPS). Several key technical parts are emphatically considered in the system design, namely high efficiency microwave power amplifier, transmitting antenna array, rectenna array and beam steering control technology. Each module of the microwave power transmission system is designed and optimized in this paper. The operating frequency of the MPT system is 5.8 GHz. The diameters of transmitting antenna and rectenna arrays are about 1.2 m and 2 m respectively, correspondingly the transmission distance is about 55 m. The transmitting microwave power is about 1600 W, the output DC power is expected to be larger than 300 W, and the accuracy of beam control is better than 0.4°. This work can provide technical support for the MPT system demonstration towards SSPS.