基于透射增强特性新型高增益天线研究

发布时间：2018-05-17 04:37

本文选题：透射增强 + 缝隙天线　；参考：《安徽大学》2017年硕士论文

【摘要】：伴随着无线通信的快速发展,小型化、低成本、高增益的天线在通信系统中越发显得重要,怎样提升天线增益也就成了一个比较棘手的课题。传统提高天线增益的方法有:在天线表面做阵列结构,或是在天线背面添加覆盖层。近几年,也有在天线金属层中建立适当结构,电磁波的增强效应会大大提升,从而达到提高增益的效果,这种基于透射增强原理的天线设计也渐渐成了研究热点。本文研究分析了透波增强理论和类Fabry-perot腔原理,通过在天线金属层中做阵列结构和添加覆盖层结构,分别设计了两款高增益的波导缝隙天线,并进行了加工,测试结果表明,天线的具备良好的增益和方向性。本文的主要工作如下:(1)运用A.F.Stevenson和Hung Yuet Yee计算方法对缝隙天线的辐射原理以及缝隙之间的互耦作用进行了电路分析,为天线设计提供了理论支撑。(2)研究分析了等离子体模型、衰逝波模型以及谐振腔模型的透射现象,针对谐振腔共振理论作了一些深入研究,通过对谐振腔的厚度和长度以及它的位置对透射特性影响的研究,发现谐振腔的位置提升的时候,缝隙的透射率是减少的,腔体的厚度和长度的增加可以增大透射率。(3)结合类F-P腔和透射增强理论,通过在天线外部添加覆盖层结构,设计了一款高增益波导缝隙天线。与传统的天线相比,天线在中心频率10.9GHz和13.7GHz处的增益有了明显的提高,达到了 11dB。(4)为了进一步减小天线的体积,在金属板的上层做阵列结构,设计了另一款缝隙天线,天线在中心频率12.7GHz和15.0GHz处的增益达到了 12dB,相比较前一款天线,这款天线的主体厚度减少了一半,具有低剖面的优势。
[Abstract]:With the rapid development of wireless communication, miniaturization, low cost, high gain antenna is becoming more and more important in the communication system, how to improve the antenna gain has become a thorny problem. Traditional methods to improve antenna gain include array structure on antenna surface or overlay on the back of antenna. In recent years, a suitable structure has been established in the metal layer of antenna, the enhancement effect of electromagnetic wave will be greatly enhanced, thus the effect of increasing gain will be achieved. The antenna design based on transmission enhancement principle has gradually become a hot research topic. In this paper, the theory of wave transmission enhancement and the principle of Fabry-perot cavity are studied and analyzed. Two kinds of waveguide slot antennas with high gain are designed by making array structure and adding overlay structure in the metal layer of antenna, and the experimental results show that two kinds of waveguide slot antennas with high gain are designed and fabricated. The antenna has good gain and directivity. The main work of this paper is as follows: (1) the radiation principle of slot antenna and the mutual coupling between slots are analyzed by using A.F.Stevenson and Hung Yuet Yee calculation method, which provides theoretical support for antenna design. Based on the theory of resonator resonance, the effects of the thickness and length of the cavity and its position on the transmission characteristics are studied. It is found that when the position of the cavity is raised, the transmittance of the slot decreases, and the increase of the thickness and length of the cavity can increase the transmittance, combining with the F-P cavity and the transmission enhancement theory, by adding the overlay structure to the outside of the antenna. A slot antenna with high gain waveguide is designed. Compared with the traditional antenna, the gain of the antenna at the center frequency 10.9GHz and 13.7GHz is obviously improved, reaching 11dB.l4) in order to further reduce the size of the antenna, an array structure is made in the upper layer of the metal plate, and another slot antenna is designed. The gain of the antenna at the center frequency 12.7GHz and 15.0GHz is up to 12 dB. Compared with the former antenna, the main body thickness of the antenna is reduced by half, and the antenna has the advantage of low profile.
【学位授予单位】：安徽大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN823.24

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