本科生畢業(yè)論文_智能天線在移動(dòng)通信中的應(yīng)用-全文預(yù)覽
【正文】 e to the needs of the user increases, the mobile munication system to the requirements of the antenna has improved. This paper first introduces the theory of electromagic wave antenna and some important parameters .then t describes the smart antenna system. it is by an antenna array and a set of the beam formation of the work, there are many differences between intelligent and traditional antenna. it has no interference between signal each other , it can reduce outside interference and noise, reduce the influence of radiation power, improve signal coverage and so on. Intelligent antenna technology will provide the best quality service to the mobile munication in future. Key words: the smart antenna。天線性能的優(yōu)劣，對(duì)移動(dòng)通信的總體性能起著非常重要的作用。與本研究成果相關(guān)的所有人所做出的任何貢獻(xiàn)均已在論文中作了明確的說明并表示了謝意。除了文中特別加以注釋和致謝的地方外，論文中不包含其他人已經(jīng)發(fā)表或撰寫的研究成果。 本人論文中有原創(chuàng)性數(shù)據(jù)需要保密的部分為： 簽名： 年 月 日 指導(dǎo)教師簽名： 年 月 日 智能天線在移動(dòng)通信中的應(yīng)用 摘 要 天線作為移動(dòng)通信的最主要元素，是輻射和接收電磁波的部件。智能天線技術(shù)無疑將為未來的移動(dòng)通信提供最優(yōu)質(zhì)的服務(wù)。 Beam form a work 目 錄 1 緒論 ................................................................................................................... 1 國內(nèi)外對(duì)智能天線的研究 ............................................................................................... 1 移動(dòng)通信及其面臨的問題 ............................................................................................... 1 2 天線的電磁波理論 ............................................................................................ 2 電磁波輻射 ....................................................................................................................... 2 時(shí)變場(chǎng)的滯后位 ............................................................................................................... 2 電偶極子的近區(qū)場(chǎng)和遠(yuǎn)區(qū)場(chǎng) ........................................................................................... 4 3 天線的電參數(shù) .................................................................................................... 4 天線方向圖 ....................................................................................................................... 4 天線方向系數(shù) ................................................................................................................... 6 天線增益 ........................................................................................................................... 6 天線的噪聲溫度 ............................................................................................................... 7 4 智能天線 ........................................................................................................... 7 智能天線原理 ................................................................................................................... 7 智能天線系統(tǒng) ................................................................................................................... 8 智能天線在實(shí)際中的應(yīng)用及不足 ................................................................................. 12 總結(jié) ..................................................................................................................... 13 參考文獻(xiàn) ....................................................................................................................................... 14 致 謝 ........................................................
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