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1、ABSTRACTABSTRACTMicrowavepowertransmission(MPT)technology,whichbringsaprofoundimpactonhumanlife,hasgotalotofattentionrecently.AsthecoredeviceoftheMPT,thedesignofrectennasisvitalforthedevelopmentofMPT.Moststudiesoftherectennashavefocusedonthelinearlyp
2、olarizedrectennasandnarrowbandrectennas.However,thenarrowbandrectennaisbandwidthlimited,thusrestrictingitsapplications;andlinearlypolarizedrectennaneedspolarizationalignedwhenreceivingelectromagneticwaves,thuslimitingitsplacementlocation.Thereforethe
3、designofbroadbandandcircularlypolarizedrectennashasimportantsignificancefortheMPT.Thisthesisintroducestheresearchonbroadbandcircularlypolarizedrectennas.Twoantennaswithwidebandandgoodcircularpolarizationcharacteristics,andawidebandrectifyingcircuitwi
4、thhigherconversionefficiency,aredesigned,withwhichawidebandcircularlypolarizedrectennawithgoodperformanceisconstituted.Thecircularpolarizationbandwidthoftherectennaisfrom1.9GHzto2.5GHz,andtheconversionefficiencyishigherthan43%,upto63%.Thefollowingcon
5、tentsareincludedinthisthesis.Thefirstchapterintroducesthebackgroundandsignificanceoftherectennas,andthesignificanceandthestatusoftheresearchonbroadbandcircularlypolarizedrectennas.Thesecondchaptergivesthetheoreticalknowledgeofrectennas,includingtheba
6、sicprinciplesofmicrostripantennas,thecircularpolarization,thefiltersandtheanalysisofrectifierdiodes.Thethirdchapterpresentstwobroadbandcircularlypolarizedantennas.Theoneisadual-broadbandcircularlypolarizedantennawhichisrealizedwithmodeanalysis,workin
7、ginthedual-bandof2.00GHz-2.65GHzand5.48GHz-6.00GHz,andanotherisaCPW-fedbroadbandcircularlypolarizedantennawhichisbasedontheout-fieldinterferingmethod,withthebandwidthexceeding1GHzandthecenterfrequencyat2.35GHz.Thefourthchapterintroducesthedesignofabr
8、oadbandrectifiercircuit.ASchottkydiodeHSMS8101andthehalf-waverectificationareadoptedtoformtherectifiercircuit,whichhasawidebandmicrowaverectificationfunctionandabestIIABSTRACTworkingbandof1.90GHz-2.50GHz.ChapterVpresentstheco-simulationoftheantennaan
