Research On Key Technology Of Maser In Space Solar Power Station System

The Space Solar Power Station(SSPS)is a satellite that operates as a power station in geosynchronous orbit.It has the characteristics of being unaffected by climate,high output power,high power generation efficiency and safety and stability,and has great development prospects in the field of sustainable energy.In the existing SSPS scheme,the area of the microwave transmitting antenna that realizes long-distance and high-density energy transmission and reception is in the order of kilometers and the quality is over 10,000 tons.Such huge size and quality have become the main technical bottleneck of SSPS,which seriously restricts SSPS.Engineering application.As a kind of microwave amplification lasing device,maser is a way to solve long-distance wireless energy transmission.However,when the existing maser is applied to SSPS,there is a problem that the output power and efficiency are small and how to ignite the microwave in the cavity,which limits the application development of the maser in SSPS.In this paper,in order to solve the problem of low power and efficiency and poor directionality of lasing microwave in the application of SSPS system,a modulation quality factor(Q)scheme for improving output characteristics is proposed,and a maser is designed.Firstly,the physical processes of spontaneous emission and stimulated radiation generated by the pump material in the resonant cavity are studied.Based on Einstein's phenomenological theory,the rate equation model of the stimulated radiation of the maser is established,and the maser is obtained.Two key output characteristics of particle number change and output power.Secondly,aiming at the problem of low power and efficiency of the maser,a Q-switching method of the cavity of the maser is proposed.A stimulated radiation model based on the Q-switching method is established.The calculation and simulation results show the adjustment.The Q method has increased the peak power by 37.7701 times and the efficiency by 101.5177 times on the basis of the original maser,which solves the problem of low peak power and low efficiency to some extent.Then a mechanical Q-switching scheme of the maser is designed,and the electromagnetic simulation and finite element simulation analysis results of the mechanical Q-switching scheme are given.The feasibility of the scheme is verified from the function realization and structural precision.Then,how to maser " Emission " wave resonator as a starting point,and laser-based Fabry-Perot antenna working principle is proposed an open microwave resonant cavity,microwave dielectric coating reflecting surface.The maser structure form,and through the three-dimensional electromagnetic simulation software and self-reproduction mode,the quasi-optical cavity and the reflective surface are simulated and analyzed,which solves how the maser has good directional directionality and single frequency plane wave.Finally,the problem of the overall simulation of the maser containing the gain medium and the cavity is difficult.Based on the appropriate assumptions,the Monte Carlo combined ray tracing method is proposed to establish the probability model and parameter equation of spontaneous emission.The simulation program is written and the normalized pattern is obtained for different samples.The results show that the Maser structure can effectively amplify and lasing the microwave compared with the traditional resonant cavity,which provides a new way for the wireless energy transmission of the SSPS system.