宽带开槽天线阵列技术分析

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1、ABSTRACTABSTRACTPhasedarrayantennaswithbroadbandwidthandwidescanninganglecharacteristicsarewidelyusedinmodernradarsystemsandelectronicwarfaresystems.Withtherapiddevelopmentofmodernmilitaryelectronictechnology,theperformancerequirementsforverywidebandwidthandlargegrating-lobefreescanv

2、olumecontinuetoincreaseinvariouselectronicsystems.Duetotheinherentmutualcouplingeffectsbetweenarrayelements,traditionalbroadbandarraysbasedonthedesignofbroadbandelementsarefoundtobemoreandmoredifficulttomeetthesechallengingrequirements.Ontheotherhand,broadbandarraysbasedonmutualcoupl

3、ingeffectsarecapableofextendingthearraybandwidthsignificantly,throughincreasingthemutualcouplingbetweenarrayelementsintentionally.Inthisthesis,somerelevantstudyontheapplicationofthenewbroadbandarraydesignapproachintothedesignofwidebandslottedarrayantennasarecarriedout.Thethesismainly

4、containsthefollowingseveralparts:Firstly,theimportanceandresearchstatusofbroadbandphasedarrayantennasareintroduced.Secondly,thebasictheoryofphasedarraysispresented.ByusingtheequivalentcircuitsandSmithchart,thephysicalessenceofhowabroadbandslotphasedarraybasedonmutualcouplingworksisde

5、scribedindetail.Thirdly,basedonthetheoreticalanalysis,aslotlineararraythathas4.5octaveswithwidescanangle(upto±45°)isdesignedthroughnumericalsimulationusingcommercialsoftware.Amicrostripline--parallellinebalunisalsodesigned,whichcanbeusedtoachievethewellimpedancetransformationandbalan

6、cetransformationbetweenthecoaxialfeedandantennaelement.Finally,asimplifiedfeednetworkconsistingofdelaylinesandpowerdividersisdesigned.Abroadbandslottedphasedlineararrayismanufactured,integratedandmeasured.Measurementresultsshowthattheproposedslotlineararrayhasapreferredwidebandwidtha

7、ndwidescanangle.Keywords:phasedarrays,broadbandarrays,slotlineararrays,mutualcoupling,balunII万方数据目录目录第一章引言....................................................................................................................11.1宽带相控阵天线的研究意义..............................................

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