低剖面集成化微基站天线研究

发布时间：2018-05-29 22:31

本文选题：微基站 + 低剖面　；参考：《电子科技大学》2017年硕士论文

【摘要】：相较于前的几代移动通信网络,4G移动通信系统由于高速、高质量的数据、图像、音视频传输而要求更宽的通信带宽,致使在移动通信中扮演至关重要角色的基站天线的设计和开发朝着多频带和宽频带的趋势发展。同时,为了减少无线信号在传输过程中因多径衰落造成的不良影响,增加系统的信道容量,双极化天线的开发也成为了设计基站天线的一个热门点。此外,在4G移动通信时代常用小体积,灵活易安装的微基站来弥补宏基站信号的覆盖盲区,因此,设计小型化、紧凑低剖面,易于集成和共形的微基站天线很有实际意义。本文针对解决室外移动通信信号覆盖问题的紧凑型集成化微基站进行了相关研究,着重于对其低剖面,能够共形和集成的结构特性,以及要满足在低仰角(偏离轴向±65°±20°)方向的波束覆盖辐射特性等方面进行了较为深入的分析和探索。本论文的主要工作内容归纳为如下几点:首先,前两章介绍了本研究内容的背景以及集成化紧凑型的微基站天线相关研究的意义和国内外学者在这方面的研究现状,并介绍了设计低剖面紧凑型微基站天线需要涉及到的天线原理方面的理论知识和设计要点等。其次,介绍可应用于室外路面信号覆盖的低剖面紧凑型集成化的微基站天线分析和设计,该天线在1.9GHz-2.2GHz频段内能满足在偏离轴向±65°±20°左右的低仰角方向实现最大辐射,且剖面高度仅7mm(约0.044λl)。为保证良好的集成性,天线的物理外观设计与所要施加的结构实现了完美的共形。第三,对上述天线进行了两种馈电优化,以模拟天线真实的工作状态和方便加工制作;并对其进行了测试,比较了天线仿真出来的性能效果与实际加工的效果之间的吻合度,证实了天线设计的可靠性和实用性;然后通过经验总结再次根据需求设计了一款工作于2.5GHz-2.7GHz的低剖面、低仰角辐射的紧凑型共形天线,并探究了多个天线紧密放置对于辐射性能的影响,分析在此基础上设计分集天线的可行性。最后,介绍工作于2.5GHz附近的低剖面、双极化、全向波束覆盖的天线,并对可能实现更低剖面的双极化天线的单天线形式进行了改进探索和验证。
[Abstract]:Compared with the previous generation of mobile communication networks, 4G mobile communication systems require wider communication bandwidth due to high speed, high quality data, image, audio and video transmission. The design and development of base station antennas which play a vital role in mobile communications are developing towards the trend of multi band and broadband. The development of dual polarized antenna has also become a hot spot in the design of base station antenna. In 4G mobile communication era, small volume, flexible and easy to install micro base station can make up for the blind area of Acer station signal, so the design miniaturized and tight. The micro base station antenna with low profile and easy to integrate and conformal is of practical significance. This paper studies the compact and integrated micro base station which solves the problem of outdoor mobile communication signal coverage, focusing on its low profile, conformal and integrated structure characteristics, as well as in the direction of low elevation angle (deviation axis + 65 + 20 degrees). The main contents of this paper are summarized as follows: first, the first two chapters introduce the background of the research content, the significance of the integrated and compact micro base station antenna research, and the research status of the domestic and foreign scholars in this field. It is necessary to design the theoretical knowledge and design points of the antenna principle in the design of a low profile compact Microbase station antenna. Secondly, it introduces the analysis and design of a compact and integrated Microbase station antenna which can be applied to the coverage of the outdoor pavement signal. The antenna can be satisfied in the 1.9GHz-2.2GHz frequency range of about 65 degree + 20 degrees in the deviation axis. The maximum radiation is achieved in the direction of low elevation, and the height of the section is only 7mm (about 0.044 L). In order to ensure good integration, the physical appearance design of the antenna and the structure to be applied are perfectly conformal. Third, two kinds of feed optimization are carried out to the above antenna to simulate the actual working state of the antenna and make it convenient for processing. In the test, the agreement between the performance effect of the antenna simulation and the effect of the actual processing is compared, and the reliability and practicability of the antenna design are confirmed. Then, through the experience, a compact conformal antenna with low profile, low elevation and radiating is designed, and several antennas are explored according to the experience. The effect of close placement on radiation performance and the feasibility of designing the diversity antenna on this basis are analyzed. Finally, a low profile, dual polarization, omnidirectional beam covering antenna near 2.5GHz is introduced, and the single antenna form of a dual polarized antenna that may have a lower profile is improved and verified.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN828.6

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