基于半波长阻抗谐振器微带陷波超宽带天线的研究

发布时间：2018-05-13 11:41

本文选题：超宽带天线 + 陷波带宽可控　；参考：《安徽大学》2016年硕士论文

【摘要】：超宽带(Ultra-wideband, UWB)系统凭借其高速的传输速率、良好的抗多径衰落能力以及低廉的系统成本等优点,广泛应用在军事、雷达、数字通讯等领域。UWB天线作为UWB通信系统的重要组成部分,直接制约着UWB通信系统的工作性能。微带贴片天线具有结构简单、易于加工、集成等优点,因而微带UWB贴片天线在超宽带系统中得到了广泛应用。目前,为了解决UWB系统与现有窄带通信系统之间相互干扰的问题,具有陷波功能的微带UWB贴片天线已经成为微带贴片天线研究的热点。本文首先介绍了UWB系统的结构和优点,接着回顾了UWB天线和微带UWB贴片天线研究进展以及具有陷波功能的微带UWB贴片天线的实现方法。为了抑制UWB通信系统与现有窄带通信系统之间的干扰(例如WLAN和WiMAX),深入研究了具有陷波功能的UWB天线。本文主要工作如下：针对现有UWB贴片天线陷波带宽难以控制的问题,首先设计了一款圆环单极子天线以实现超宽带特性；然后在馈电线附近添加非对称半波长二阶阻抗谐振器实现陷波特性,陷波带宽可以通过调整非对称半波长二阶阻抗谐振器的宽度、位置和间距来控制；最后对该天线进行加工、测量,实验结果表明设计的陷波带宽可控的圆环单极子UWB贴片天线可以有效地抑制WLAN对超宽带系统的影响。通过在铃形辐射单元上加载互补开口谐振环、在馈电线附件添加非对称U形半波长阻抗谐振器,设计了一款新型双陷波平面超宽带天线。首先对该天线的陷波原理、天线陷波结构进行了深入研究,然后通过仿真和优化使得天线在3.4-3.6GHz和5.1-5.9GHz频段内实现双陷波特性；最后对该天线进行了加工和测试,结果表明该天线能够在WiMAX和WLAN的两个频段内有效地抑制干扰。文章最后总结了两款陷波超宽带天线的设计、仿真、测量工作,并结合5G发展对今后陷波超宽带天线提出展望。
[Abstract]:Ultra - wideband ( UWB ) systems are widely used in military , radar , digital communication , etc .
then adding an asymmetric half - wavelength second - order impedance resonator near the feed line to realize the notch characteristic , and the notch bandwidth can be controlled by adjusting the width , position and spacing of the asymmetric half - wavelength second - order impedance resonator ;
At last , the antenna is processed and measured . The experimental results show that the designed notch bandwidth controllable ring monopole UWB patch antenna can effectively suppress the influence of WLAN on ultra - wideband system . By loading complementary split resonant ring on the bell - shaped radiating element , a novel double - notch planar ultra - wideband antenna is designed . Firstly , the notch principle of the antenna and the notch structure of the antenna are further studied , and then the double notch characteristics are realized by simulation and optimization so that the antenna can realize double notch characteristics in the range of 3.4 - 3.6 GHz and 5.1 - 5.9 GHz ;
At last , the antenna is processed and tested . The results show that the antenna can effectively suppress the interference in the two frequency bands of WiMAX and WLAN . Finally , the design , simulation and measurement of the two notch UWB antennas are summarized , and the prospect of the future notch UWB antenna is put forward in conjunction with 5G development .

【学位授予单位】：安徽大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TN822.8

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