陷波超宽带天线的设计与研究

发布时间：2018-04-19 00:00

本文选题：超宽带天线 + 圆弧状H形槽　；参考：《中南大学》2014年硕士论文

【摘要】：超宽带频段(UWB)由美国联邦通信委员会(FCC)于2002年批准由军用进入民用,工作范围为3.1-10.6GHz。天线是无线通信系统中的重要组成部分,其性能的很大程度上决定了整个系统性能的好坏,所以在超宽带系统中,超宽带天线的研究具有重大的意义。在拥有众多窄带信号系统的超宽带频段内,防止这些系统的信号干扰是超宽带天线的重要研究课题,通过设计具有频带阻断效应的陷波超宽带天线是解决信号干扰问题最便捷有效的方法。本文首先对超宽带天线及具有陷波功能的超宽带天线的国内外发展状况进行了介绍,然后对影响超宽带天线性能的重要参数进行了分析,同时介绍了陷波功能的一般实现方法。接下来对一种小型平面超宽带天线进行了优化和改造,在该天线的基础上设计了一种带圆弧状H形槽的双陷波超宽带天线,能有效防止3.3-3.6GHz的Wimax信号和5.1-5.9GHz的WLAN信号。最后进行了三陷波天线的设计,在双陷波的基础上,加入了对7.25-7.75GHz的X频带卫星下行信号的屏蔽。在进行可控性设计时,实现了双陷波和三陷波的可调节功能,提高了天线的陷波工作性能。在对所设计的双陷波天线的仿真分析中发现产生陷波功能的圆弧状H形槽相对传统的H形槽和线形槽,能够通过参数组合的方式更有效地调节陷波的中心频率,这使天线在制造和进行其他的改进设计时有了更方便的选择。对三陷波超宽带天线进行可控性设计中,将开关设计为与陷波结构相同的环形结构。这样的设计使得天线在实现三陷波向双陷波转换的过程中,同时改进了双陷波天线的陷波性能。实验结果证明,所设计的陷波超宽带天线不仅有良好的频带阻断效果,还拥有良好的全向辐射性和稳定的增益。
[Abstract]:UWB (UWB) was approved by the Federal Communications Commission (FCC) for civilian use in 2002, with a range of 3.1-10.6 GHz.Antenna is an important part of wireless communication system, and its performance determines the performance of the whole system to a great extent, so the research of UWB antenna is of great significance in UWB system.In the ultra-wideband (UWB) band with many narrowband signal systems, the prevention of signal interference from these systems is an important research topic of UWB antenna.The design of notch UWB antenna with band blocking effect is the most convenient and effective method to solve the problem of signal interference.This paper first introduces the development of UWB antenna and the UWB antenna with notch function at home and abroad, then analyzes the important parameters that affect the performance of UWB antenna, and introduces the general realization method of notch function.Then, a small planar ultra-wideband antenna is optimized and modified. Based on this antenna, a double-notch ultra-wideband antenna with circular H-groove is designed, which can effectively prevent the Wimax signal of 3.3-3.6GHz and the WLAN signal of 5.1-5.9GHz.Finally, the design of three-notch antenna is carried out. On the basis of double notch, the 7.25-7.75GHz X-band satellite downlink signal is shielded.In the controllability design, the tunable functions of double notch and three notch are realized, and the performance of antenna notch is improved.In the simulation analysis of the designed double-notch antenna, it is found that the circular arc H-groove, which produces notch function, can adjust the center frequency of notch more effectively than the traditional H-groove and linear slot.This gives the antenna a more convenient choice when it comes to manufacturing and other improved designs.In the controllability design of three-notch UWB antenna, the switch is designed as a ring structure with the same notch structure.This design makes the antenna transform from three notch to two notch, and improves the notch performance of double notch antenna at the same time.Experimental results show that the designed notch UWB antenna not only has good bandwidth blocking effect, but also has good omnidirectional radiation and stable gain.
【学位授予单位】：中南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN822.8

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