›› 2017, Vol. 37 ›› Issue (2): 19-27.doi: 10.16708/j.cnki.1000-758X.2017.0028

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Designandtestofmicrowavepowertransmissionsystem

 WANG  Ying1,2,*, WEI  Gao1, DONG  Ya-Zhou1,2, DONG  Shi-Wei2, FU  Wen-Li2, LI  Xiao-Jun2, RAN  Li-Xin3   

  1. 1CollegeofElectronicInformation,NorthwesternPolytechnicalUniversity,Xi′an710072,China
    2ChinaAcademyofSpaceTechnology(Xi′an),Xi′an710000,China
    3ZhejiangUniversity,Hangzhou310027,China
  • Received:2016-11-22 Revised:2017-01-20 Online:2017-06-25 Published:2017-05-18

Abstract: MicrowavepowertransmissionservedasthecoretechnologyoftheSpaceSolarPowerSatellite(SSPS)wasstudied.Therectifyingsurfacewasresearchedbasedontheconceptofperfectlymatchedlayertosolvetheproblemthatbeamcollectionefficiencywoulddeclinewithdistanceawayfromtransmittingantennabecauseofthespreadofbeam,bychangingperfectlymatchedlayerstructureconjugatematchbetweenantennaoutputimpedanceandrectifiercircuitinputimpedance.Therectifyingsurfaceexhibitsastrongrestraintohighorderharmonics,withouttheneedofRFfilterwhichisanimportantelementforthetraditionalrectenna,sothecircuitstructureissimpleandhighconversionefficiencyenergycanberealized.Andundertheproposedlimitforthecenter-of-beampowerdensitytoassureenvironmentalhealthandsafetyformicrowavetransmission,anexperimentalsystemwithsolidpoweramplifierat5.8GHzwasconstructedandtested,andthemaximumconversionefficiencyis57.7%.TheexperimentresultsshowthatthedesignedmicrowavepowertransmissionsystemisbenefitforgrounddemonstrationtestinginminiatureversionandbuildingofSSPSinfuture.

Key words: SpaceSolarPowerSatellite, microwavepowertransmission, antenna, perfectlymatchedlayer, rectifier, centerofbeam, powerdensitiy