本文選題：微帶天線 + 全向天線��； 參考：《安徽大學(xué)》2017年碩士論文

【摘要】：天線作為無線通信鏈路的前端設(shè)備,受到了越來越多的關(guān)注。在諸多天線類型中,兼具全向性和圓極化特性的全向圓極化天線以其自身出眾的優(yōu)勢,獲得了廣泛的應(yīng)用。本文主要針對無線通信中的全向圓極化微帶天線設(shè)計、分析與實現(xiàn)技術(shù)進行了研究,并設(shè)計了兩款全向圓極化微帶天線。論文的主要工作如下:(1)論文首先在討論了全向圓極化天線研究背景和現(xiàn)狀的基礎(chǔ)上,詳細介紹了微帶天線的輻射原理與基本參數(shù)以及微帶天線的饋電方式。接著分析了全向圓極化天線實現(xiàn)的基本理論和微帶天線寬頻帶、小型化性能的實現(xiàn)技術(shù)。(2)在理論研究的基礎(chǔ)之上,提出了一款中心饋電的全向圓極化微帶天線。天線通過對稱加載四組L型槽和短路銷釘,實現(xiàn)了全向圓極化的輻射特性。同時,通過在天線四周加載四組連續(xù)放置的寄生單元,改善了天線的阻抗匹配。實驗結(jié)果表明,該天線10dB阻抗帶寬和3dB軸比帶寬分別為8.2%和9.2%。(3)基于雙層結(jié)構(gòu)模型,提出了一種寬帶全向圓極化微帶天線。天線包含一個底部加載的同軸探針、四個短路銷釘和兩對帶有圓弧形振子的領(lǐng)結(jié)形貼片。以中心耦合饋電的領(lǐng)結(jié)形天線為基礎(chǔ),對稱地加載四個短路銷釘和圓弧形振子,獲得了一個垂直極化波和一個水平極化波,實現(xiàn)了天線的全向圓極化性能;通過合并天線的TM01模式和TM02模式,實現(xiàn)了較寬的工作帶寬。寄生單元的加入,同樣改善了天線的阻抗匹配。該天線工作在2.4 GHz-WLAN頻段,通過加工與測量,結(jié)果表明,該天線1OdB阻抗帶寬和3dB軸比帶寬分別為16.5%和20.5%。
[Abstract]:As a front-end device for wireless communication links, antenna has attracted more and more attention. In many antenna types, omnidirectional circular polarized antenna with omnidirectional and circular polarization characteristics has been widely used for its outstanding advantages. This paper mainly focuses on the design, analysis and implementation of omnidirectional circular polarized microstrip antenna in wireless communication. Two omnidirectional circular polarized microstrip antennas are designed. The main work of this paper is as follows: (1) first, on the basis of discussing the background and current situation of the omnidirectional circular polarized antenna, the radiation principle and basic parameters of the microstrip antenna and the feeding mode of the microstrip antenna are introduced in detail. Then the omnidirectional circular polarization is analyzed. The basic theory of antenna realization, the broadband band of microstrip antenna and the realization of miniaturized performance. (2) on the basis of theoretical research, a center fed omnidirectional circular polarized microstrip antenna is proposed. By loading four groups of L slots and short circuit pins symmetrically, the radiation characteristics of the omnidirectional circular polarization are realized. At the same time, the antenna is added in the antenna for four weeks. Four groups of continuous parasitic units are carried to improve the impedance matching of the antenna. The experimental results show that the 10dB impedance bandwidth and the 3dB axis ratio bandwidth are 8.2% and 9.2%. (3), respectively, based on the double layer structure model, and a broadband omnidirectional circular polarized microstrip antenna is proposed. The antenna contains a coaxial probe loaded at the bottom, four short circuit pins and two. On the basis of a tie shaped antenna fed by a central coupling, four short circuited pins and a circular arc oscillator are loaded symmetrically, and a vertical polarization wave and a horizontal polarization wave are obtained. The antenna's omnidirectional circular polarization performance is realized. The width of the antenna is realized by combining the TM01 mode and the TM02 mode of the antenna. The working bandwidth of the parasitic unit also improves the impedance matching of the antenna. The antenna operates at the 2.4 GHz-WLAN band, and the results show that the antenna's 1OdB impedance bandwidth and the 3dB axis ratio are 16.5% and 20.5%., respectively.

【學(xué)位授予單位】：安徽大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN822

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