小型多频段和宽频带微带天线的研究与设计

发布时间：2018-02-17 04:05

本文关键词： 微带天线 HFSS 小型化多频段天线宽频段天线　出处：《太原理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：天线是无线通讯系统的关键一环,能量通过天线以电磁能量形式辐射出去,天线辐射性能的好坏直接影响通信质量。微带天线具备共面性好,结构简单,易集成等优点,在各类无线电子设备中的应用日益增多。本论文主要研究了小型微带天线的多频设计和频带拓展技术,给出了几款天线设计。本论文的主要研究内容如下:(1)给出了两款新型三频段天线设计。第一款天线采用折叠单极子,缩减了天线设计的尺寸,通过接地板加载缝隙设计,使天线工作频段覆盖了WLAN和Wi MAX频段。第二款天线是同轴线馈电的三频段矩形微带天线,采用天线多频段设计中的单片法,选取合适的馈电点在单个辐射贴片上激励起两个谐振频率,应用在4G移动通信系统频段,并且在辐射贴片上进行开缝设计激励起天线的高频谐振应用在未来5G通信频段。(2)概括了微带天线的频带拓展技术,综合利用频带拓展方法实现了三款新型天线的宽频化设计。通过降低天线品质因数和多谐振法设计实现了天线的宽频段设计,并且通过加载缺陷地结构将阻抗带宽在原来基础上拓展到覆盖整个民用超宽带频段;设计了两款均由共面波导进行馈电的宽带天线,分别是覆盖WIFI2.45GHz、WiMAX2.6GHz、WiMAX3.5GHz频段的云朵状宽带天线和应用在全网通手机伞状宽带天线。
[Abstract]:Antenna is the key link of wireless communication system. The energy radiates through the antenna in the form of electromagnetic energy. The radiation performance of the antenna directly affects the communication quality. The microstrip antenna has the advantages of good coplanar, simple structure and easy integration. In this paper, we mainly study the multi-frequency design and band expansion technology of small microstrip antenna. Several antennas are designed. The main contents of this paper are as follows: 1) two new types of three-band antennas are designed. The first antenna uses folded monopole, reduces the size of antenna design, and loads slot design through the floor. The second antenna is a three-band rectangular microstrip antenna fed by coaxial line. Two resonant frequencies are excited on a single radiation patch by selecting a suitable feed point, which is applied in the frequency band of 4G mobile communication system. At the same time, the high frequency resonance of exciting antenna on the radiation patch is applied to 5G communication frequency band in the future. (2) the band expansion technology of microstrip antenna is summarized. The broadband design of three new antennas is realized by synthetically using the band expansion method, and the broadband band design of the antenna is realized by reducing the antenna quality factor and using the multi-resonance method. The impedance bandwidth is extended to cover the entire civil UWB band by loading the defective ground structure, and two broadband antennas are designed, which are fed by coplanar waveguides. They are cloud broadband antennas covering WiFi 2.45GHz WiMAX2.6GHz WiMAX3.5GHz band and those used in all Netcom mobile phone umbrella-shaped wideband antennas.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN822

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