【作者】 郑玮玮；

【导师】 刘学观；

【作者基本信息】 苏州大学 ， 电子与通信工程， 2011， 硕士

【摘要】 近几年,随着雷达、电子对抗和通信技术的日益发展,天线的应用也日益广泛。因此,对天线的性能,特别是对天线的体积、重量、工作频段等方面提出了更多、更高的要求。平面型印刷天线因其具有重量轻、体型小和制作简单、辐射能力强等优点而得到广泛研究。因此如何研究设计结构小巧且又具有宽带特性的印刷天线成为研究的一个热点。平面型准八木天线(Quasi-Yagi antenna)就是这样一种宽带天线,它继承了八木天线(Yagi-Uda)辐射方向性强的优点,而且可以采用高介电常数的介质材料,使天线的尺寸明显缩小;更主要的是它具有平面结构,易于组阵,方便实现多频段。本文将重点研究该类天线。本论文在已有文献提出的多频段准八木天线的基础上,提出了通过在印刷面加设多条振子以获得多波段的设计方法。利用这种方法,设计了一款加载不规则折线的紧凑型四波段平面印刷天线,其尺寸为130×130×1mm,较好地覆盖了600MHz、1200MHz、1950MHz、2300MHz的多个波段。本文首先利用电磁仿真软件进行了结构建模,研究了已有文献所提出的准八木天线的性能;然后在此基础上,通过深入分析各结构参数对性能的影响的基础上,提出了增加折线振子的方法,以实现所需的多频段要求,并制作了相应的实物。测试结果表明,本文提出的这个设计方法是有效的,为实现多频段天线提供了一条新的思路。本论文在内容上共分为五个章节。第一章为绪论;第二章介绍了天线的基础知识;第三章介绍了已有文献中的平面型准八木天线性能并对它进行仿真研究;第四章介绍了改进的紧凑型平面准八木天线的仿真研究;第五章则介绍了改进型平面准八木天线的实现。在本论文的最后,对准八木天线的仿真研究与实验研究进行对比、分析,总结研究的结论,并对今后的工作提出展望。更多还原

【Abstract】 In recent years, with the development of radar, electronic warfare and communication technology development, the antenna is widely used. Therefore, the performance of the antenna, in particular to the volume of the antenna and the operating band, weight, etc. to put forward more, taller requirement. Plane printed antenna because of its light weight, small size and simple manufacture, strong ability of radiation has been studied extensively. So how to design compact structure and the printed antenna with broadband characteristics has become a hot spot of research. Planar Quasi-Yagi antennais a broadband antenna, it inherits the Yagi antenna radiation and strong advantages, but also can be used to the high dielectric constant dielectric material, so that the size of the antenna is obviously reduced; more important is that it has a planar structure, easy array, to facilitate the realization of multi frequency band. This article will focus on this kind of antenna.In this dissertation the proposed multi-band Quasi-Yagi antenna based on the printing surface, is proposed by adding a plurality of oscillator to obtain multi-band design method. Using this method, and designs a load of irregular line of compact four band planar printed antenna, its size is 130 x 130 x 1mm, good coverage of the 600MHz, 1200MHz, 1950MHz, 2300MHz and multiple band. This paper first uses the electromagnetic simulation software for structural modeling, studies the existing literature have raised Quasi-Yagi antenna performance; then, through the thorough analysis of the structural parameters on the performance of the impact foundation, put forward to increase the meander line method, in order to achieve the desired band, and produced the corresponding real. The test results show that, this paper presents the design method is effective, in order to realize multi band antenna provides a new train of thought.The thesis is divided into five chapters .The first chapter is introduction; The second chapter introduces the basic knowledge of antennas; The third chapter introduces the existing literature in plane Quasi-Yagi antenna performance and its simulation; The fourth chapter introduces the improved compact plane Quasi-Yagi antenna simulation study; The fifth chapter introduces the improved plane Quasi-Yagi antenna implementation.At the end of this thesis, alignment Yagi antenna simulation and experimental study of contrast, analysis, summarized the research conclusions, and put forward the prospects for future work.更多还原