超宽带脉冲天线及其阵列波束扫描的研究

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1、电子科技大学硕士学位论文超宽带脉冲天线及其阵列波束扫描的研究姓名：张连红申请学位级别：硕士专业：无线电物理指导教师：阮成礼20100401摘要着广泛的应用前景，比如移动目标的检测与跟踪技术的实现。本文仿真测试了一简单的两单元线阵的波束扫描情况，其扫描精度与计算值相吻合。6．本文设计了一种低成本、高量程、多路输出、结构简单的延时器，其扫描精度较高。根据波束扫描理论拟合出了一个扫描角度与对应光纤长度的经典公式，为设计延时器每集光纤的延时量提供了理论计算基础。超宽带脉冲天线又称时域天线，它作为一种新型的天线，成为了近年来国内外天线领域研究的焦点之一。由于它具有辐射脉冲信号的能力，并和激励脉冲保持很

2、好的保真性，同时具有极宽的带宽，这意味着此类天线作为电磁脉冲武器的辐射器，应用于军事领域具有广阔的前景。关键词：超宽带脉冲天线(时域天线)，波束扫描，低频特性，光控实时延时(d丌D)，电连接llABSTRACTCarrier-freepulsetechnologyandultra-broadband(uwB)technologyhavealreadywidelyappliedintargetrecognition,imaging,anti—stealth，anti—interferenceandUWBcommunicationandSOon,Theantennasaskeycomponent

3、ofpulseandUWBsystemshavealsobecomeresearchfocus．ThispapermainlymakesastudyonseveralUWBpulseantennas，antennaarrayandbeamscanning,itscontentisfocusedonantennatime-domainandfrequency-domaincharacteristics，planarUWBantennaminiattLrization,electrical．connectedUWBslotantennaarraydesignanditsbeamscanninga

4、ndpresentsatimedelaydeviceandSOon．TheworkandinnovationsaleaSfollows：1．TheantennagainCanbeimprovedbyvirtueofsubstratecladding，theresultofsimulationhasbeeneffective，single-layersubstrateCanin．easetheantennagainby3-5dB．Usingdielectricmaterialinmicrostripantennais趾importantdevelopmentdirectionfornewhig

5、hgainantenna．Thestudyisnotonlyawonderfulguideforsubstrateappliedinantenna,butalsoanimportantreferencevalueforminiaturizationhi曲-gainantennadevelopment．2．SeveralUWBpulseantennasaredesignedtomeetanitem”XXXXXX"requirementofsmallcaliber(7cm)antenna，theseantennashavelotoffeatures，suchasnewloadtechnology

6、,smallsize，broadbandwidth，highgain，gooddirection,lowprofileandSOon．Eachloadtechnologysolvessometechnicalproblem：Loadingrestraintapertureringtechnologyincreasesradiationefficiencyandreducesthelowfrequency；Inordertoeliminatepulseringingandsolveseriousresonantproblem，acirculardouble-patchguidetechniqu

7、eisused；overlappingloadatGSM．1800stopbandistomakethesystemworkwitlltheGSMsystemnothappenbandcrosstalk．3．Anewlockpatchantennafedbycoplanarwaveguideisdesigned，itsmaximumdiameteriS6cm。thebandwidthfrom1．4GHzto1