Abstract: 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.

Key words: SpaceSolarPowerStation, microwavepowertransmission, fielddistribution, rectennaarray