射频传输线的设计及仿真摘要射频（RF)是可以辐射到空间的电磁HYPERLINK"http://baike.baidu.com/view/30964.htm"\t"_blank"频率，频率范围从300KHz～300GHz，它是一种高频交流变化HYPERLINK"http://baike.baidu.com/view/1015.htm"\t"_blank"电磁波的简称。传输线是用横电磁(TEM)模的方式传送电能和（或）电信号的导波结构,传输线的特点是横向尺寸小于工作波长。射频传输线的设计具有重要的意义，传输线设计是高频有线网络和HYPERLINK"http://www.eccn.com/search/?q=%C9%E4%C6%B5"\o"射频"\t"_blank"射频微波工程的基础，为了使能量可以在通信网路中无损耗地传输，良好的传输线设计是重要关键。伴随着计算机技术的不断普及发展，计算机的辅助分析和辅助设计在各个工程领域获得了相当广泛的应用与继承。传输线问题借助计算机来辅助求解计算时，比较准确和快捷。我们利用传输线的相应解析式，用MATLAB语言编制了求解传输线问题的一些程序。阻抗匹配是最重要的分布电路设计方法，它直接决定着电路负载获得信号功率的大小。我们就微带线阻抗匹配进行了理论上的讨论及其仿真实现。关键字：传输线理论MATLAB计算机辅助计算微带线特性阻抗仿真RFTransmissionLineDesignandSimulationABSTRACTRadiofrequency(RF)saidelectromagneticfrequencycanberadiationintospace,therangeofthefrequencyrangefrom300KHZto300GHZ,itisakindofhighfrequencyacchangeelectromagneticwaves.Transmissionlinesbasedontransverseelectromagnetic(TEM)waytotransmitpowerand(or)electricalsignalsofguidedwavestructures,thecharacteristicsofthetransmissionlineishorizontalsizesmallerthanthewavelengthofthework.ThedesignoftheRFtransmissionlineisofgreatimportance,transmissionlinedesignisahighfrequencycable,RFmicrowaveengineering,opticalfibercommunicationandsoonthebasisofphotoelectricengineering,inordertomakeenergycanwithoutlossoftransmissioninthecommunicationnetwork,agooddesignofatransmissionlineiscritical.Alongwiththepopularizationanddevelopmentofcomputertechnology,thecomputeraidedanalysisanddesigninvariousengineeringfieldsobtainedwidespreadapplicationanddevelopment.Problemoftransmissionlineswiththehelpofacomputertoassistinsolvingcalculation,moreaccurateandfast.Weusecorrespondinganalyticalformulaoftransmissionline,thetransmissionlineproblemiscompiledwithMATLABlanguageofsomeoftheprogram.Distributioncircuitdesignmethodofimpedancematchingisthemostimportant,itdirectlydecidesthecircuitloadtoobtainthesizeofthesignalpower.We'llbemicrostriplineimpedancematchingforthediscussionoftheoryandsimulationimplementation.Keywords:TransmissionlinetheoryMATLABcomputeraidedc