本文選題：手機天線 + 小型化��； 參考：《電子科技大學》2014年碩士論文

【摘要】：隨著3G移動通信網(wǎng)絡(luò)的大規(guī)模鋪設(shè)和LTE的逐步發(fā)展,對應用較廣的移動通信終端手機天線的設(shè)計提出了越來越苛刻的要求,如超薄、超小、多頻段工作等等,因此,研究小型、多頻手機天線具有較大的實際意義。另外,為了提高頻譜資源有限的頻譜利用率以及通信容量,多輸入多輸出(MIMO)手機天線的設(shè)計也顯得愈加緊迫和困難。一般來說,實際中預留給手機天線的設(shè)計空間大約為15×30×5 mm3,同時,所設(shè)計的手機天線要能夠覆蓋現(xiàn)有的GSM/UMTS/LTE中的常用通信頻段。本文首先簡述了手機天線的研究背景及進展。結(jié)合手機終端設(shè)備的固有特點指出了該天線設(shè)計中的一般考慮,進而分別討論了三種主要的寬帶技術(shù)—寬帶匹配網(wǎng)絡(luò)技術(shù)、集總元件加載技術(shù)以及分布式效應匹配技術(shù)—的具體工作原理和在終端天線設(shè)計中的應用。接著,分析討論了輔助設(shè)計軟件Ansoft HFSS的使用,這包括手機天線設(shè)計中結(jié)構(gòu)模型的建立,邊界條件、激勵端口的設(shè)置,以及結(jié)果分析與參數(shù)的優(yōu)化設(shè)計。接著,本文根據(jù)不同的集總電感加載對天線輸入阻抗匹配的不同影響,通過理論分析和建模仿真優(yōu)化,把相應的集總電感直接加載在天線輻射元中的合理位置,完成能夠覆蓋GSM850/900/DCS1800/PCS1900/UMTS2100/LTE2300頻段的手機單天線的設(shè)計目的。為了更清晰地說明該天線的設(shè)計過程,本文討論分析了該天線的工作原理和一些關(guān)鍵參數(shù)。其次,本文研究了開槽技術(shù)對提高多天線端口隔離度的機理作用,分析設(shè)計出一款能夠覆蓋DCS1800/PCS1900/UMTS2100/LTE2300/2500頻段的MIMO手機天線的設(shè)計方案,且端口隔離度滿足小于-15 dB的行業(yè)要求。然后,對該天線的結(jié)構(gòu)參數(shù)和測量結(jié)果進行了分析,證明本文設(shè)計方案的可靠性和實用性。最后,本文著重討論了終端MIMO天線的關(guān)鍵指標---相關(guān)性系數(shù)的計算,并給出了相應的計算流程圖;基于上述MIMO天線方案,計算了相應的相關(guān)性系數(shù);計算結(jié)果表明該方案的相關(guān)性系數(shù)滿足行業(yè)指標要求。
[Abstract]:With the large-scale laying of 3G mobile communication network and the gradual development of LTE, more and more stringent requirements have been put forward for the design of mobile phone antenna, which is widely used in mobile communication terminal, such as ultra-thin, ultra-small, multi-band work and so on. Multi-frequency mobile phone antenna has great practical significance. In addition, in order to improve the spectrum efficiency and communication capacity of limited spectrum resources, the design of multiple input multiple output (MIMO) mobile phone antenna has become increasingly urgent and difficult. Generally speaking, the design space reserved for the mobile phone antenna is about 15 脳 30 脳 5 mm / 3 in practice. At the same time, the designed mobile phone antenna should be able to cover the common communication frequency band of GSM / UMTS / LTE. In this paper, the research background and progress of mobile phone antenna are introduced. Combined with the inherent characteristics of mobile terminal equipment, this paper points out the general considerations in the design of the antenna, and then discusses three main broadband technologies-broadband matching network technology. The principle of lumped component loading and distributed effect matching technology and its application in terminal antenna design. Then, the use of the auxiliary design software Ansoft is analyzed and discussed, which includes the establishment of the structure model, the boundary condition, the setting of the excitation port, the analysis of the results and the optimization of the parameters in the antenna design of the mobile phone. Then, according to the different influence of different lumped inductance loading on antenna input impedance matching, through theoretical analysis and modeling simulation optimization, the corresponding lumped inductance is directly loaded in the reasonable position of antenna radiator. To complete the design of a single antenna that can cover the GSM 850 / 900 / DCS 1800 / PCS 1900 / UMTS 2100 / LTE2300 band. In order to explain the design process of the antenna more clearly, the working principle and some key parameters of the antenna are discussed and analyzed in this paper. Secondly, this paper studies the mechanism of slot technology to improve the isolation degree of multi-antenna ports, analyzes and designs a design scheme of MIMO mobile phone antenna which can cover DCS1800 / PCS1900 / UMTS2100 / LTE2300 / 2500 band, and the port isolation degree meets the industry requirements of less than -15 dB. Then, the structural parameters and measurement results of the antenna are analyzed, which proves the reliability and practicability of the design scheme. Finally, this paper mainly discusses the calculation of correlation coefficient, which is the key index of terminal MIMO antenna, and gives the corresponding flow chart, and calculates the correlation coefficient based on the above MIMO antenna scheme. The calculation results show that the correlation coefficient of the scheme meets the requirements of the industry index.
【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】：TN828.6
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本文編號：2053605