异向介质宽带天线及新型可穿戴天线的研究

发布时间：2018-03-17 16:39

  本文选题：宽带天线　切入点：复合左/右手传输线　出处：《天津大学》2015年博士论文　论文类型：学位论文

【摘要】：随着手持通信设备及超宽带无线通信技术的飞速发展,电子设备的功能越来越强大,信号带宽也在不断提高。人们对无线通信系统中天线的性能提出了更高的要求,主要体现在频带的范围更宽、体积更小、便于安装和携带,同时具有较高的辐射效率等等。因此,对宽带天线理论与技术开展深入的研究显得尤为重要。本论文对异向介质宽带天线、宽带可穿戴天线及超宽带印刷天线理论与技术进行了深入研究。分析了异向介质带宽增强技术机理,探讨了新型异向介质宽带天线的设计方法;总结了共面波导结构特点,提出了基于共面波导馈电的可穿戴天线的设计方案;研究了超宽带平面单极子天线设计原理,进行了超宽带印刷单极子天线的设计。现将论文的主要工作及创新点总结如下:1.研究了异向介质带宽增强原理,将复合左/右手传输线和互补分裂谐振环两种异向介质结构集成至天线馈电网络中,并进行建模及优化。设计了两款新型异向介质宽带天线,并对其中一款天线进行了加工测试。改变了将异向介质集成至天线辐射单元或引入异向介质设计天线罩的常规设计方法。通过改变馈电电路,在不增加天线尺寸的前提下,实现了降低谐振频率、增加天线带宽的目的。2.提出了使用日常衣物的纺织材料作为可穿戴天线介质基底的设计方法,设计并测试了三款新型宽带可穿戴天线。实现了可穿戴天线与日常衣物的融合,大大提高了可穿戴天线的适应性、灵活性和隐蔽性,为将抢险服、消防服等纺织材料作为基底设计专用型可穿戴天线奠定了基础。3.将共面波导馈电方式引入牛仔布为介质基底的可穿戴天线设计中,利用共面波导馈电天线接地板与辐射贴片位于介质基底同侧的优势,以及牛仔布的介质基底结构,实现了直接将天线附于日常衣物表面的目的,简化了可穿戴天线的加工过程,降低了可穿戴天线的集成难度。4.研究了超宽带天线中不同接地板和辐射贴片结构对天线时域及频域特性的影响,通过建模优化,设计了一款新型超宽带平面单极子天线并进行了加工测试。通过改进辐射贴片结构,在不改变天线大小的前提下,加大了辐射边界,降低了谐振频率。通过在传统接地板上加入两个对称三角形金属结构,改善了天线的阻抗匹配程度,扩展了天线带宽,实现了超宽带设计。
[Abstract]:With the rapid development of hand-held communication equipment and ultra-wideband wireless communication technology, the functions of electronic devices are becoming more and more powerful, and the signal bandwidth is also increasing. Mainly reflected in the wider range of the band, smaller volume, easy to install and carry, at the same time has a higher radiation efficiency and so on. It is very important to study the theory and technology of broadband antenna. The theory and technology of wideband wearable antenna and ultra-wideband printed antenna are studied in detail. The mechanism of bandwidth enhancement is analyzed, the design method of new broadband antenna is discussed, and the structural characteristics of coplanar waveguide are summarized. A design scheme of wearable antenna based on coplanar waveguide feed is proposed, and the design principle of UWB planar monopole antenna is studied. The design of UWB printed monopole antenna is carried out. The main work and innovation of this paper are summarized as follows: 1. The compound left-hand transmission line and complementary split resonant ring are integrated into the antenna feed network, and two novel heterodyne broadband antennas are designed. One of the antennas has been processed and tested. The conventional design method of integrating the diameters into the antenna radiation unit or introducing the different dielectric to design the radome is changed. By changing the feed circuit, the antenna size is not increased. The aim of reducing the resonant frequency and increasing the antenna bandwidth is realized. 2. The design method of using the textile material of daily clothing as the substrate of wearable antenna medium is proposed. Three new types of wideband wearable antennas are designed and tested. The fusion of wearable antennas and daily clothing is realized, which greatly improves the adaptability, flexibility and concealment of wearable antennas. Textile materials, such as fire fighting clothing, have laid a foundation for the design of wearable antennas for special purpose. 3. The coplanar waveguide feed is introduced into the design of wearable antennas with denim as the dielectric substrate. By using the advantages of the coplanar waveguide fed antenna connecting the floor and the radiation patch on the same side of the dielectric substrate and the dielectric substrate structure of the denim, the purpose of directly attaching the antenna to the surface of daily clothing is realized, and the processing process of the wearable antenna is simplified. The integration difficulty of wearable antenna is reduced. 4. The effects of different floor connections and radiation patch structures on the characteristics of the antenna in time domain and frequency domain are studied and optimized by modeling. A new UWB planar monopole antenna is designed and tested. By improving the radiation patch structure, the radiation boundary is increased without changing the antenna size. By adding two symmetrical triangular metal structures to the conventional floor, the impedance matching degree of the antenna is improved, the bandwidth of the antenna is expanded, and the design of UWB is realized.
【学位授予单位】：天津大学
【学位级别】：博士
【学位授予年份】：2015
【分类号】：TN822.8
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本文编号：1625594