【作者】 彭金花；

【导师】 王华栋；

【作者基本信息】 福州大学 ， 通信与信息系统， 2006， 硕士

【摘要】 近年来,微带天线在很多领域中有着广泛的应用,主要是由于微带天线具有重量轻、低剖面、成本低、易于制造、封装和安装等许多固有的优点。目前,已有许多成功的微带天线阵的设计应用在个各种系统中,使得我的这次设计具有现实的意义。本设计的任务是在毫米波波段设计低损耗馈电网络的毫米波微带阵列天线。本文前期工作完成了天线阵元的方案确定、阵元具体设计、相关的理论分析,包括前三章。第一章引言中简要介绍了研究背景、微带天线的特点和现状。第二章则采用传输线法和腔模理论对矩形微带天线进行分析,对现有的微带线特性参数的计算公式进行分析比较,选用K-J算法对有效介电常数和特性阻抗进行色散修正,使毫米波微带线的设计更加准确。第三章在对现有的计算矩形贴片元物理尺寸的公式进行分析比较的基础上,提出了Keff频率修正算法,最后采用MATLAB数值计算工具进行各参数计算,完成了单片矩形微带贴片天线阵元的设计。本文的后期工作完成了四元微带子阵的设计,针对各项指标进行了测试并与高频分析软件Ansoft HFSS的模拟结果进行比较,理论值和实测值进行比较具有较好的一致性,说明采用Keff频率修正算法计算矩形贴片物理尺寸是有效可行的。对微带线损耗分析的基础上,提出了一种计算微带阵列天线整体馈线损耗的方法。重点进行了256元等功率分配串并馈电网络的设计,给出了最终的光刻加工图。最后测试了所设计微带天线阵的S参数和增益,测试结果表明,256元毫米波微带阵列天线能够比较准确地谐振在35GHz,增益为28.05dB,达到国内外先进水平。更多还原

【Abstract】 Microstrip antennas have been used in many applications in recent years. This popularity is due to their inherent advantages like lightweight,thin profile and easy manufacturing,packaging,and installing. Now, many successful Microstrip antenna array designs have been used in various kinds of systems already, this makes my design realistic and feasible. The task of this project is to design millimeter-wave microtrip array antenna with low loss feed network. The first part of the article includes analysis and design of array elements. Chapter one is preface, introducing research background. The characteristics and status quo of microstrip are discussed in research background. In chapter two, rectangular microstrip antenna has been analyzed by transmission-line and modal-expansion cavity models. K-J dispersion model is used to revise effective relative permittivity and impedance,this made the design of microstrip more accurate. In chapter three, puts forward KEFF arithmetic to compute the physical dimensions of rectangular microstrip antennas.At last,single rectangular microstrip element has been designed successfully. The second part of the article completes the design of four elements microstrip array,the measured results are compared with the simulation results of Ansoft HFSS, most of which are shown to be in good agreement. This shows that Keff arithmetic is feasible in computing the physical dimensions of rectangular microstrip antennas.A method of calculating the overall losses of MM-wave microstrip array antenna has been put forward based on the analysis of microstrip feedline loss. The parallel/series feed network of 256 elements for the array’s uniform power distribution are designed particularly,,also shows the photograph of 35-GHz full microstrip array with 256 elements.The measurement shows that the resonant frequency is 35GHz and the gain of 28.05dB can be obtained, this arrives at the advanced degree in the world.更多还原