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1、基于FDTD算法的移动通信天线设计基于FDTD算法的移动通信天线设计DesignofMobileCommunicationAntennaUsingFDTD基于FDTD算法的移动通信天线设计基于FDTD算法的移动通信天线设计摘要本文针对当今内置手机天线设计难点和热点,设计了一种兼具有宽带和小型化特性的平面单极子天线,在实现小型化同时,扩展天线工作带宽。该天线采取了顶部加载金属圆盘和对寄生贴片开槽等措施,分析了槽的宽度、加载圆盘、套筒和介质矩形尺寸等参数对天线性能的影响,并采用电压源馈电以及高斯脉冲提供能量,设计并制作了一种
2、实现移动通信频带的平面单极子天线,该天线可作为手机内部的移动通信天线使用,工作在824~960MHz和1.71~1.88GHz的宽频段上。本文利用FDTD算法对天线设计进行分析,由于仿真程序将直接影响到天线仿真设计的准确性和效率,本文使用MATLAB进行可视化分析,并把结果与HFSS仿真结果相比较,进一步优化了频带带宽,立体地解释三维输出模型。计算机仿真结果证明了用FDTD算法计算单极子天线的有效性和优越性,将FDTD应用于天线的研究将成为一个天线设计重要的研究方向。关键词:平面单极子,时域有限差分法,HFSS仿真,MA
3、TLAB仿真,优化设计基于FDTD算法的移动通信天线设计DesignofMobileCommunicationAntennaUsingFDTDABSTRACTInthispaper,thefinitedifferencetime-domain(FDTD)methodisusedformobilecommunicationantennaresearchanddesignwork.Inrecentyears,withthedevelopmentandmaturityofmobilecommunicationsandDCS/G
4、SMsystem,researchandApplicationofplanarmonopoleantennahasbeenreceivingmoreandmoreattention.Thethirdgenerationmobilecommunicationsystemisproposedtakingintoaccountthewide-band,miniaturization,radiationefficiencyrequirementsofantennas.Firstly,fundamentalPrincipleofF
5、DTDandbasicknowledgeofMobileCommunicationAntennadesignareintroducedinthispaper,thendiscussesdescribedantennaparametersoftheFDTDmethod.Secondly,paperintroducedHFSSelectromagneticsimulationsoftware,presentsthebasicknowledgeanddesignprocessofHFSS.Onthebasis,thispape
6、rpresentsresearchanddesignworkofplanarmonopoleantenna.Sincethemonopoleantennahastheadvantageofomni-directionalradiation,cheap,lightweightandwidebandwidth,ithasbeenappliedtothecellphoneantenna.Traditionalmonopoleantennatherehasdisadvantageofnarrowbandwidthandlower
7、frequenciesinphysicallimitation,limitingtheengineeringapplicationofmonopoleantenna.CoexistenceofGSMandDCSsystemapplysadoublestandard.Withprovidinganaloganddigitalservicesinthesamenetwork,thecorrespondingdual-bandantennashouldbeabletoworktheband(824~960MHzand1.71~
8、1.88GHz).InthisOperatingbandwidth,weshouldensurethattheantennaVSWRisenoughlowandsmooth,withgoodimpedancematching.Toradiateoutsignalenergywithintheband基于FDTD算法的