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类型 基础研究 预答辩日期 2017-11-29
开始(开题)日期 2015-06-10 论文结束日期 2017-10-20
地点 无线谷A3414 论文选题来源 973、863项目     论文字数 5 (万字)
题目 毫米波亚毫米波天线关键技术研究
主题词 轨道角动量天线,圆极化天线,太赫兹光滑喇叭天线,基片集成同轴线
摘要 近年来,随着高速无线通信技术的迅猛发展,微波频段的频谱资源已日趋枯竭。因此,研究与开发毫米波乃至亚毫米波频段的频谱资源成为了当务之急。而毫米波亚毫米波天线作为无线通信系统中的重要部件也受到越来越多的关注。本论文分别对毫米波透射式平面轨道角动量天线、毫米波反射式平面轨道角动量天线、高性能的毫米波平面圆极化阵列天线以及太赫兹高高斯耦合度光滑喇叭天线等进行了较为深入的研究。论文的主要工作如下: 第一章首先对透射式的平面轨道角动量(Orbital Angular Momentum,OAM)天线的整体设计方案进行了研究,提出了基于平面透射阵列天线的平面螺旋移相面设计思路并给出了设计公式。该平面螺旋移相面通过在周期排列的相位调节单元上打空气通孔实现,利用仿真软件可以得到空气孔孔径与透射相位的关系。然后,分别设计了工作在94GHz的单板单模轨道透射式角动量天线和单板多模透射式平面轨道角动量天线。最后对两款天线远场的幅度和相位方向图分别进行了测试,并通过得到的相位方向图提取了两款天线波束的轨道角动量模式系数谱,证明了设计方法的有效性。上述研究结果已发表于Scientific Reports。 第二章提出了偏馈反射式的轨道角动量天线。首先基于平面反射阵列天线给出了偏馈反射式轨道角动量天线整体设计的思路和设计公式。然后通过设置主从边界条件的仿真方法得到反射相位随调相单元中孔径变化的关系。接着从单元和整体的角度分别分析了偏馈角度对天线性能的影响。最后设计了一款工作在94GHz的反射式轨道角动量天线,并测量了其幅度相位方向图以及轨道角动量模式系数谱。上述研究结果已发表于IET Microwaves, Antennas & Propagation。 第三章主要研究了平面宽带圆极化阵列天线。首先基于基片集成同轴线(Substrate Integrated Coaxial Line,SICL)和背腔贴片天线设计了一款工作在E波段的圆极化阵列天线。然后提出并分析了一种新型波导到基片集成同轴线转接结构,该转接结构能实现两组宽带等幅反相差分传输。基于此转接结构设计了一款紧凑型的平面圆极化阵列天线。与传统的蜿蜒线结构相比,基于新型馈电结构的天线阵列面积减小了约47%。测试得到该紧凑天线阵列的3dB轴比带宽达到了9.3%,回波损耗带宽达到了19.9%,频带内的最高增益为12.3dBi。本章的部分结果将发表在IET Microwaves, Antennas & Propagation(已录用)。 第四章主要开展了太赫兹高高斯耦合度光滑喇叭天线的研究。首先采用模式耦合技术(Mode Coupling Technique)对四段式多模喇叭天线进行了分析,得到喇叭口面模式分布。然后利用三次样条曲线(Cubic Spline)对四段式喇叭天线进行光滑化处理,得到光滑曲面初始喇叭天线。接着利用MATLAB和CST WMS对该光滑曲面喇叭天线进行联合仿真,基于回溯搜索算法迭代优化得到在220GHz处高斯耦合度超过99%的喇叭天线。最后对该喇叭天线进行了加工测试,其回波损耗、远场方向图和增益均与仿真结果高度吻合,证明了该设计方法的有效性。本章的部分内容已投稿至IEEE Trans. on Antennas and Propagation。
英文题目 Investigations on Several Key Issues of Millimeter Wave and Sub-Millimeter Wave Antennas
英文主题词 orbital angular momentum antennas,circularly polarized antennas,THz smooth-walled horn antennas,substrate integrated coaxial line
英文摘要 Recent years have witnessed the increasing exhausted microwave band due to the development of the high-speed wireless communication. Thus, investigations on the systems in millimeter wave and submillimeter wave bands are of great significance. Antennas, the important components in the communication systems, have attracted growing number of attentions. In this dissertation, transmission orbital angular momentum antennas, reflection orbital angular momentum antennas, millimeter wave planar circularly polarized antenna arrays and terahertz smooth-walled horn antennas with a high Gaussian coupling efficiency are studied. The dissertation is organized as follows: Chapter One focus on the studies of transmission planar orbital angular momentum (OAM) antennas. A design method of the planar spiral phase plate (SPP) based on the theory of planar transmission antenna array has been proposed. The proposed planar SPP utilizes a perforated substrate to control the outputting phase for generating beams carrying OAM with arbitrary modes. The transmission phase characteristics of the cell are analyzed with the aid of a full-electromagnetic-wave simulation software. Then, a one-SPP-one-mode and a one-SPP-dual-mode antenna working at 94GHz have been designed with the proposed method. Simulated and measured results including the phase pattern, the magnitude pattern as well as the OAM spectrum are obtained. The results experimentally verify the studies of this chapter. Part of the work is published in Scientific Reports. Chapter Two focus on the studies of offset-fed reflection planar orbital angular momentum antennas. The design method of reflection planar orbital angular momentum antennas comes from the theory of planar reflection antenna array. A commercial full-wave simulator is adopted to analyze the transmission phase characteristics of the cell, through using the floquent theory. In addition, the cell analysis and the whole antenna system analysis have been carried out to obtain the proper offset distance respectively. An offset-fed reflection planar orbital angular momentum antenna working at 94GHz has been proposed as well. The magnitude pattern, the phase pattern and the OAM spectrum experimentally verity the studies of chapter. Part of the work is published in IET Microwaves, Antennas & Propagation. Chapter Three focus on the studies of millimeter wave planar circularly polarized antenna arrays. First, a meander-line fed circularly polarized antenna array is proposed, employing the Substrate Integrated Coaxial Line (SICL) and a cavity-backed patch antenna. Moreover, a novel waveguide-to-SICL transition is proposed and analyzed, which provides two sets of differential signal. Based on the novel waveguide-to-SICL transition, a compact planar circularly polarized antenna array working at 75GHz is proposed. The area of the compact array is only half of the conventional one. The achieved bandwidth of the proposed antenna array with measured S11<-10dB is 19.9% (68.1~83.2 GHz). The measured AR below 3dB bandwidth is about 9.3% (71~78 GHz) and the measured peak gain is 12.3 dBi. Part of the work has been accepted by IET Microwaves, Antennas & Propagation. Chapter Four focus on the studies of a fast and accurate design method for the smooth-walled horn antenna with a high Gaussian coupling efficiency. First, the mode coupling technique has been introduced to analyze the prototype, i.e. the two-flare horn antenna which then has been optimized with a spline profile. In this design method, accurate commercial full-wave simulation software CST MWS, rather than a mode analysis method, is adopted to further improve the Gaussian coupling efficiency performance. As a demonstration, a smooth-walled horn antenna working at 220 GHz has been simulated, fabricated and measured. Both simulated and measured results show that the designed horn exhibit high symmetric, low sidelobe patterns in E-plane, H-plane and 45 degree planes, which verify the proposed design method. Part of the work has been submitted to IEEE Transactions on Antennas and Propagation.
学术讨论
主办单位时间地点报告人报告主题
东南大学 2013.10 无线谷A3414 储鹏 毫米波小型化滤波器研究
东南大学 2014.4 无线谷A3414 成立 太赫兹反射阵列天线的研究
东南大学 2014.7 无线谷A3414 Prof. Ke Wu 太赫兹新技术
东南大学 2015.2 无线谷A3414 成立 轨道角动量天线设计小结
伦敦大学玛丽女王学院 2015.10 工程楼会议室 成立 Orbital Angular Momentum Antenna Design
伦敦大学玛丽女王学院 2016.5 工程楼会议室 Dr. Bo Zhang THz IC technique and applications
东南大学 2016.10 无线谷A3414 成立 A new method to design high Gaussian efficiency horn antenna
东南大学 2016.12 无线谷A3414 Prof. Zhi-Ning Chen Metamaterial antennas and applications
     
学术会议
会议名称时间地点本人报告本人报告题目
ISAP2015 2015.11 澳大利亚 An E-band circularly polarized antenna array fed by substrate integrated coaxial line (SICL)
UK THz workshop 2016.3 伦敦 Mode coupling technique in antenna design
     
代表作
论文名称
Generation of electromagnetic waves with arbitrary orbital angular momentum modes
Design and implementation of planar reflection spiral phase plate for beams with orbital angular mom
An E-band circularly polarized antenna array fed by substrate integrated coaxial line (SICL)
 
答辩委员会组成信息
姓名职称导师类别工作单位是否主席备注
陈如山 正高 教授 博导 南京理工大学
钱祖平 正高 教授 博导 解放军陆军工程大学
郝张成 正高 教授 博导 东南大学
周健义 正高 教授 博导 东南大学
蒋之浩 正高 教授 博导 东南大学
      
答辩秘书信息
姓名职称工作单位备注
李萌彦 副高 工程师 东南大学