FDTD法在單極天線特性分析中的應(yīng)用

頁數(shù) 70 字?jǐn)?shù) 20679

摘要
FDTD法已廣泛的應(yīng)用于對電磁場問題的數(shù)值分析，本文探討用FDTD法來分析單極天線的特性。主要借鑒了已有的FDTD法在時(shí)諧電磁場近場區(qū)的場分析程序,得出了入射波為TE,TM時(shí)該天線近場區(qū)E,H的幅值和相位圖。用該結(jié)果可以進(jìn)一步推得天線的遠(yuǎn)區(qū)輻射場及其性能指標(biāo)。并討論了該天線在無限大金屬接地平面和有限尺寸金屬接地平面時(shí)，對該天線輻射場的影響。得出了導(dǎo)體板尺寸的大小在一定程度上影響單及天線特性的結(jié)論。

關(guān)鍵詞：
時(shí)域有限差分法,近場分布,單極天線

Abstract
In the numerical analysis of electromagnetic field,the FDTD method has been used widely.this paper will discuss the feature of monopole antenna with us in the FDTD method.First,with the parsing program for near field of electromagnetic field,we can get the amplitude and phase diagram of E,H variate in the antenna's near field area when the incident wave is TE or TM.Having the results,we could get the feature of antenna's far field and it's plant.Then,we will talk about the influence to the aerial's radial field,when there is the infinite or finite plane with metal grounding.In the end,we get a conclusion that the feature of monopole antenna is affected by the size of conductor board to certain extent.Keyword:finite difference time domain,distribution in near field,monopole antenna.
Keywords: Finite Difference Time Domain，Distribution in near field，Monopole Antenna
參考文獻(xiàn)：
1．周朝棟 王元坤.天線與電波 西安電子科技大學(xué)出版社,1999
2．楊顯清 趙家升.電磁場與電磁波 國防工業(yè)出版社,2003
3．馬西奎.電磁場理論及應(yīng)用 ,西安交大出版社1999
4．倪光正 錢秀英.電磁場的計(jì)算機(jī)輔助設(shè)計(jì), 西安交大出版社1985
5．倪光正 楊仕友.工程電磁場數(shù)值計(jì)算，機(jī)械工業(yè)出版社2004