本文選題：手機天線 + 4G��； 參考：《西南交通大學》2014年碩士論文

【摘要】：如今,手機移動通信早已經邁進3G時代,并開始向4G通信系統(tǒng)過渡。為滿足人們對手機功能越來越多的需求,如高速數據傳輸、藍牙、4G LTE等,天線設計趨勢的方向轉變?yōu)椴粩嗤卣固炀�的帶寬。然而超寬帶天線的低頻都會受到天線尺寸的限制,因此如何在特定空間內設計出帶寬足夠寬的天線是業(yè)界的一大難題。另一方面,現代集成電路技術和工藝的迅猛發(fā)展使得電子產品也變得越來越小,其中天線作為無線通信設備中的終端部件,對小型化的實現亦是迫在眉睫。另外,手機輻射對人體造成的安全問題是大家關心的,SAR值已成為業(yè)界關心的強制性指標。 首先,我們在有限空間內的適當位置上設計出能覆蓋WLAN雙頻段的天線,并對其方向圖和效率等其他指標進行研究。之后對天線進行實物加工,對其電性能進行驗證。 文中利用PIFA.單極子天線、loop等結構自身的特性,并利用耦合饋電、增加匹配網絡等方式來增加天線帶寬,在天線的兩端分別設計能覆蓋新增LTE頻段的天線。設計的主天線支持LTE700/GSM850/900/DCS/PCS/UMTS/LTE2300/WiMax2500頻段,副天線支持GSM900/DCS/PCS/UMTS/LTE2300頻段。后期對主天線進行了實物加工,對其帶寬、方向圖、增益和效率等進行了測試。 對由主天線和副天線的基本結構組成的LTE MIMO進行研究,對其帶寬、隔離度和相關系數等值進行仿真分析,通過轉換位置和變換天線形狀等方式使得各項指標均達到平衡進而完成整個系統(tǒng)的設計。
[Abstract]:Today, mobile phone communication has entered the 3G era, and began to transition to 4G communication system. In order to meet the increasing demand for mobile phone functions, such as high-speed data transmission, Bluetooth 4G LTE and so on, the trend of antenna design is changing to expand the bandwidth of antenna. However, the low frequency of UWB antenna is limited by the antenna size, so how to design a wide enough bandwidth antenna in a specific space is a big problem in the industry. On the other hand, with the rapid development of modern integrated circuit technology and technology, electronic products become smaller and smaller. Antenna, as the terminal part of wireless communication equipment, is urgent to realize miniaturization. In addition, the safety problem caused by mobile phone radiation has become a mandatory target of concern to the industry. First of all, we design the antenna which can cover the dual band of WLAN in the proper position in the finite space, and study the pattern and efficiency of the antenna. After that, the antenna is processed in kind and its electrical performance is verified. PIFA. The characteristics of monopole antenna loop and other structures are analyzed. The coupling feed and matching network are used to increase the bandwidth of the antenna. The antennas which can cover the new LTE band are designed at each end of the antenna. The main antenna is designed to support the LTE700/GSM850/900/DCS/PCS/UMTS/LTE2300/WiMax2500 band and the secondary antenna to support the GSM900/DCS/PCS/UMTS/LTE2300 band. The main antenna was processed and its bandwidth, pattern, gain and efficiency were tested. The LTE MIMO, which is composed of the main antenna and the secondary antenna, is studied, and its bandwidth, isolation and correlation coefficient are simulated and analyzed. By changing the position and the shape of the antenna, all the indexes are balanced and the design of the whole system is completed.
【學位授予單位】：西南交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN929.53

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