本文選題：微帶貼片天線　切入點：雙極化　出處：《電子科技大學》2014年碩士論文

【摘要】：無線通信產(chǎn)業(yè)的發(fā)展之迅速令人矚目,這都是由于無線通信用戶對無線通信質量提出了更高的要求。在無線通信系統(tǒng)的實現(xiàn)過程中,選擇合適的天線對整個無線通信網(wǎng)絡的性能至關重要,這是因為空間無線信號的發(fā)射和接收都是依靠天線來完成的。雙極化微帶天線不僅具有微帶天線的諸多優(yōu)點,如低剖面、低成本、易共形以及適合組合設計等,而且能夠提供極化多樣化,以減少接收信號的多徑衰落,降低損耗、減小干擾,還能減少天線數(shù)量,節(jié)省基建投資。近年來在雷達、微波定位以及通信系統(tǒng)等領域,雙極化技術已逐步成為研究熱點。而提高兩個極化端口間的隔離度、抑制交叉極化以及展寬帶寬是雙極化微帶天線設計的重點和難點。本論文在闡述雙極化微帶天線基本理論的基礎上,以提高兩個極化端口間隔離度為目標,對雙極化微帶天線結構、饋電功分網(wǎng)絡和陣列等方面進行了研究。本論文的主要工作內容如下:1.在雙極化微帶天線基本原理的基礎上,研究了微帶天線的設計方法,并設計了一種工作在2.4~2.5GHz頻段的高隔離度雙極化微帶天線單元。該天線單元采用空氣貼片、垂直雙H形孔徑耦合的結構,通過仿真和實測分析了不同貼片間距以及孔徑大小對天線隔離度的影響,得到了良好的端口間隔離度,優(yōu)于-31dB。2.在Wilkinson功分器原理的基礎上,基于陣列天線的并聯(lián)饋電方式,設計了應用于八個輻射單元的饋電網(wǎng)絡,用于陣列基站天線的饋電。3.將高隔離度雙極化微帶天線單元和功分饋電網(wǎng)絡組成一個1*8的均勻直線陣基站天線,并對其進行實物測試。結果表明,該高隔離度雙極化基站天線的隔離度能達到-33dB以下,其他參數(shù)指標也基本能滿足通信要求。
[Abstract]:The rapid development of wireless communication industry is due to the higher requirements of wireless communication users.In the realization of wireless communication system, choosing the appropriate antenna is very important to the performance of the whole wireless communication network, because the transmitting and receiving of the space wireless signal depends on the antenna.Dual polarization microstrip antenna not only has many advantages of microstrip antenna, such as low profile, low cost, easy conformal and suitable for combination design, but also can provide polarization diversification to reduce multipath fading and loss of received signal.Reduce interference, but also reduce the number of antennas, save capital investment.In the fields of radar, microwave positioning and communication system, the dual polarization technology has gradually become a research hotspot in recent years.Increasing the isolation between two polarization ports, suppressing cross-polarization and broadening bandwidth are the key points and difficulties in the design of dual-polarization microstrip antenna.Based on the basic theory of dual-polarization microstrip antenna and aiming at improving the isolation between two polarized ports, the structure of dual-polarization microstrip antenna, feed power distribution network and array are studied in this paper.The main work of this thesis is as follows: 1.Based on the basic principle of dual-polarization microstrip antenna, the design method of microstrip antenna is studied, and a high isolation dual-polarization microstrip antenna unit working in 2.4~2.5GHz band is designed.The antenna unit is composed of air patch and vertical double H-shaped aperture coupling. The effect of different patch spacing and aperture size on antenna isolation is analyzed by simulation and measurement. A good isolation between ports is obtained, which is better than -31dB.2.Based on the principle of Wilkinson power divider and the parallel feed mode of array antenna, a feed network applied to eight radiating units is designed, which is used to feed the antenna of base station array.The high isolation dual polarization microstrip antenna unit and the power division feed network are used to form a 1 / 8 uniform linear array base station antenna and its physical measurement is carried out.The results show that the isolation of the dual-polarization base station antenna with high isolation can reach -33dB, and other parameters can basically meet the requirements of communication.
【學位授予單位】：電子科技大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN820

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本文編號：1687704