【正文】 基于 FDTD 算法的移動通信天線設(shè)計 學(xué)校代碼： 10255 學(xué) 號： 2111033 基于 FDTD 算法 的移動通信天線設(shè)計 Design of Mobile Communication Antenna Using FDTD 學(xué)科專業(yè)：信息與通信工程 論文作者：王卉 指導(dǎo)老師：單志勇 副教授 基于 FDTD 算法的移動通信天線設(shè)計 二零一四年十一月 東華大學(xué)學(xué)位論文原創(chuàng)性聲明 本人鄭重聲明：我恪守學(xué)術(shù)道德，崇尚嚴(yán)謹(jǐn)學(xué)風(fēng)。所呈交的學(xué)位論文，是本人在導(dǎo)師的指導(dǎo)下，獨立進(jìn)行研究工作所取得的成果。除文中已明確注明和引用的內(nèi) 容外，本論文不包含任何其他個人或集體已經(jīng)發(fā)表或撰寫過的作品及成果的內(nèi)容。論文為本人親自撰寫，我對所寫的內(nèi)容負(fù)責(zé)，并完全意識到本聲明的法律結(jié)果由本人承擔(dān)。 學(xué)位論文作者簽名： 日期： 年 月 日 基于 FDTD 算法的移動通信天線設(shè)計 東華大學(xué)學(xué)位論文版權(quán)使用授權(quán)書 學(xué)位論文作者完全了解學(xué)校有關(guān)保留、使用學(xué)位論文的規(guī)定 ，同意學(xué)校保留并向國家有關(guān)部門或機(jī)構(gòu)送交論文的復(fù)印件和電子版，允許論文被查閱或借閱。本人授權(quán)東華大學(xué)可以將本學(xué)位論文的全部或部分內(nèi)容編入有關(guān)數(shù)據(jù)庫進(jìn)行檢索，可以采用影印、縮印或掃描等復(fù)制手段保存和匯編本學(xué)位論文。 保密 □，在 年解密后適用本版權(quán)書。 本學(xué)位論文屬于 不保密 □。 學(xué)位論文作者簽名： 指導(dǎo)教師簽名： 日期： 年 月 日 日期： 年 月 日 基于 FDTD 算法的移動通信天線設(shè)計 基于 FDTD 算法的移動通信天線設(shè)計 摘 要 本文針對當(dāng)今內(nèi)置手機(jī)天線設(shè)計難點和熱點，設(shè)計了一種兼具有寬帶和小型化特性的平面單極子天線， 在實現(xiàn) 小型化同時 ， 擴(kuò)展天線工作帶寬 。 該天線采取了頂部加載金屬圓盤和對寄生貼片開槽等措施 ， 分析了槽的寬度、加載圓盤、套筒和介質(zhì)矩形尺寸等參數(shù)對天線性能的影響，并采用電壓源饋電以及高斯脈沖提供能量，設(shè)計并制作了一種實現(xiàn)移動通信頻帶的平面單極子天線 ，該天線可作為 手機(jī)內(nèi)部的移動通信天線 使用 ，工作 在 824~960MHz 和 ~ 的寬頻段上。 本文 利用 FDTD 算法對 天線 設(shè)計進(jìn)行 分析 ， 由于 仿真程序?qū)⒅苯佑绊懙教炀€仿真設(shè)計的準(zhǔn)確性和效 率，本文 使用 MATLAB 進(jìn)行可視化分析 ，并 把結(jié)果 與 HFSS 仿真結(jié)果相比較， 進(jìn)一步 優(yōu)化了頻帶帶寬，立體地解釋三維輸出模型。計算機(jī)仿真結(jié)果證明了用 FDTD 算法計算單極子天線的有效性 和優(yōu)越性， 將 FDTD 應(yīng) 用于天線的研究將成為一個 天線設(shè)計 重要的研究方向。 關(guān)鍵詞： 平面單極子，時域有限差分法， HFSS 仿真， MATLAB 仿真，優(yōu)化設(shè)計 基于 FDTD 算法的移動通信天線設(shè)計 Design of Mobile Communication Antenna Using FDTD ABSTRACT In this paper, the finite difference timedomain (FDTD) method is used for mobile munication antenna research and design work. In recent years, with the development and maturity of mobile munications and DCS / GSM system, research and Application of planar monopole antenna has been receiving more and more attention. The third generation mobile munication system is proposed taking into account the wideband, miniaturization, radiation efficiency requirements of antennas. Firstly, fundamental Principle of FDTD and basic knowledge of Mobile Communication Antenna design are introduced in this paper, then discusses described antenna parameters of the FDTD method. Secondly, paper introduced HFSS electromagic simulation software, presents the basic knowledge and design process of HFSS. On the basis, this paper presents research and design work of planar monopole antenna. Since the monopole antenna has the advantage of omnidirectional radiation, cheap, light weight and wide bandwidth, it has been applied to the cell phone antenna. Traditional monopole antenna there has disadvantage of narrow bandwidth and lower frequencies in physical limitation, limiting the engineering application of monopole antenna. Coexistence of GSM and DCS system applys a double standard. With providing analog and digital services in the same work, the corresponding dualband antenna should be able to work the band (824 ~ 960MHz and ~ ). In this Operating bandwidth, we should ensure that the antenna VSWR is enough low and smooth, with good impedance matching. To radiate out signal energy within the band 基于 FDTD 算法的移動通信天線設(shè)計 effectively, input impedance must be consistent to ensure constant pulse characteristics, which it is very difficult to achieve. Because cell phone antenna design for today is difficult and hot, and we design a microstrip monopole antenna having broadband and miniaturization characteristics, in order to miniaturization and extend the operating bandwidth of the antenna, the antenna has taken measures such as loading the top of metal disc and slotting parasitic patches and so on. With analysis of the width in the groove, loaded disc, sleeve impact, medium rectangle size and other parameters on the antenna performance, while with a voltage source to feed and a Gaussian pulse to provide energy, the planar monopole antenna has been designed and fabricated within a mobile munication band. The phone39。s internal antenna for mobile munication is very wide, which works on 824 ~ 960MHz and ~ dualband. The simulation program through FDTD analysis of antenna will directly affect the accuracy and efficiency of the antenna simulation design. Based on FDTD principle, we can use MATLAB statements to finish visual analysis. Compared with the HFSS simulation results, we find that the antenna processes more optimized frequency bandwidth, and more specific interpretation of threedimensional output model could be got. The study about FDTD code for planar monopole antenna design is relatively small, so that it will bee an important research direction. Key words: Planar monopole, FDTD algorithm, HFSS simulation, MATLAB simulation，Optimization design. 基于 FDTD 算法的移動通信天線設(shè)計 目錄 第一章 緒論 ........................................................................................................... 9 研究背景 ................................................................................................................ 9 天線的概念分析 ........................................................................................... 10 移動通信天線的技術(shù)要求 ............................................................................. 12 天線的數(shù)值分析方法 .................................................................................... 12 平面單極天線的擴(kuò)頻方法 ............................................................................. 15 國內(nèi)外研究現(xiàn)狀 .............................................................................................