紧凑型MIMO天线的理论与实验研究

发布时间：2018-06-04 10:17

  本文选题：WLAN + WIMAX　； 参考：《电子科技大学》2016年硕士论文

【摘要】：现代通信系统的核心业务从早期简单的语音通话慢慢的转变为数据交换量巨大的多媒体服务。因此现代通信系统对通信容量及可靠性的需求越来越高。多输入多输出技术(Multiple Input Multiple Output;MIMO)可以在不增加发射功率的基础上利用空间多径性,获得明显的分集增益,有效增加信道容量和可靠性。将MIMO技术与WLAN(wireless local area network)技术和Wi MAX(world-wide interoperability microwave access)技术相结合,可以增加数据传输速率、提高通信质量。所以相关多频带MIMO天线的研究是现代无线通信系统发展的一个焦点。超宽带系统的发射功率较小,所以其传输距离比较近。将MIMO技术与超宽带技术相结合,不但可以实现超宽带系统的远距离传输,而且可以增加数据传输速率。可以预见超宽带MIMO系统前景广阔,设计出性能良好的超宽带MIMO天线有很强的实际应用价值。本学位论文的内容如下:1、提出了一款基于WLAN/WiMAX通信的紧凑型MIMO天线。天线辐射单元采用曲流技术,实现多频工作,测量结果显示此款天线完整覆盖WLAN和WiMAX频带。此款天线的创新点在于:采用开槽的方法实现天线的多频化,经过4次开槽之后天线辐射贴片的形状类似于“F”型结构,通过调节枝节的长度可以很方便的调节工作频率;在地板上,两个辐射贴片之间延伸出一个多枝节的树状隔离枝节作为天线的隔离结构,有效提高了两个辐射单元之间的端口隔离度。2、提出了一款共面波导馈电的三频带MIMO天线。该款天线引入互补开口环结构实现多频化,并引入隔离单元实现良好的端口隔离度。测量结果显示此款天线完整覆盖WLAN和WiMAX频带。该款天线的创新点在于:辐射单元采用互补开口环结构实现多频化;利用极化分集提高隔离度;利用树状隔离枝节提高天线系统的端口隔离度。3、提出了一款基于UWB通信的紧凑型MIMO天线,测量工作频率为2.9GHz-13GHz,测量结果显示此款天线完整覆盖整个超宽带频带。此款天线的优点在于优良的隔离度,价格低廉和全向辐射特性。该款天线的创新点在于:辐射单元采用共面波导馈电,展宽工作带宽;利用极化分集提高隔离度;利用树状隔离枝节提高天线系统的端口隔离度。
[Abstract]:The core business of modern communication system has changed from simple voice call to multimedia service. Therefore, the demand for communication capacity and reliability of modern communication system is higher and higher. Multiple Input Multiple output Mimo) can obtain significant diversity gain without increasing transmit power, and increase channel capacity and reliability effectively. The combination of MIMO technology with WLAN(wireless local area network) technology and Wai MAX(world-wide interoperability microwave access) technology can increase the data transmission rate and improve the communication quality. Therefore, the research of correlated multi-band MIMO antenna is a focus of the development of modern wireless communication systems. UWB transmission power is small, so its transmission distance is relatively close. The combination of MIMO technology and UWB technology can not only realize the long-distance transmission of UWB system, but also increase the data transmission rate. It can be predicted that the UWB MIMO system has a bright future, and the design of UWB MIMO antenna with good performance has strong practical application value. This dissertation is as follows: 1. A compact MIMO antenna based on WLAN/WiMAX communication is proposed. The antenna radiation unit uses meandering technology to realize multi-frequency operation. The measurement results show that the antenna covers the WLAN and WiMAX bands completely. The innovation of this antenna lies in: the method of slot is adopted to realize the multi-frequency antenna. After four slots, the shape of antenna radiation patch is similar to that of "F" type structure, and the working frequency can be easily adjusted by adjusting the length of branch; On the floor, a multi-branch tree branch is extended between the two radiation patches as the isolation structure of the antenna, which effectively improves the isolation degree between the two radiation units. A three-band MIMO antenna fed by a coplanar waveguide is proposed. This antenna introduces complementary open loop structure to realize multi-frequency, and the isolation unit is introduced to achieve good port isolation. The measurement results show that the antenna covers the WLAN and WiMAX bands completely. The innovation of the antenna is that the radiation unit adopts the complementary open loop structure to realize multi-frequency, and the polarization diversity is used to improve the isolation degree. A compact UWB antenna based on UWB communication is proposed. The measured frequency is 2.9 GHz ~ 13 GHz. The measured results show that the antenna covers the whole UWB band completely. The advantages of this antenna are its excellent isolation, low price and omnidirectional radiation characteristics. The innovation of the antenna is that the radiation unit is fed by coplanar waveguide to widen the working bandwidth, polarization diversity is used to improve the isolation degree, and the tree isolation branch is used to improve the isolation degree of the antenna system.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TN820

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中国期刊全文数据库 前1条

1 杨晓非,刘银碧,代睿;UWB技术及前景探讨[J];数据通信;2003年04期

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本文编号：1976994