本文選題：TD-LTE + 超材料��； 參考：《大連海事大學(xué)》2017年碩士論文

【摘要】：時分長期演進(Time Division Long Term Evolution,TD-LTE)是一種專門為移動高寬帶應(yīng)用而設(shè)計的無線通信標準。在TD-LTE通信系統(tǒng)中,常常采用多天線、雙極化傳輸技術(shù),以達到充分利用空間資源,提升通信系統(tǒng)容量的目的。為了滿足現(xiàn)代通訊系統(tǒng)對天線性能"靈活多變"的需要,極化可重構(gòu)天線應(yīng)運而生。極化可重構(gòu)天線可以改變天線的極化方式,增加天線的應(yīng)用范圍,因此具有廣泛的應(yīng)用前景。近年來,各種結(jié)構(gòu)的超材料不斷涌現(xiàn),將其特殊的電磁特性應(yīng)用于天線設(shè)計中,可以通過機械的方式使天線實現(xiàn)極化可重構(gòu),從而避免了電控極化可重構(gòu)天線中偏置器件帶來的各種問題,簡單、易于實現(xiàn)。目前,超材料加載極化可重構(gòu)微帶天線大多工作于單極化方式下,超材料加載極化可重構(gòu)雙極化微帶天線的研究很少見,因此,本文研究應(yīng)用于TD-LTE通信系統(tǒng)的超材料加載極化可重構(gòu)雙極化天線的設(shè)計與實現(xiàn)方法。本論文的主要工作和成果可概括為:根據(jù)微帶天線理論設(shè)計工作于TD-LTE頻段的縫隙耦合雙極化微帶貼片天線。在此基礎(chǔ)上,通過加載一層不同結(jié)構(gòu)的超材料表面設(shè)計了三款TD-LTE頻段的超材料加載極化可重構(gòu)雙極化天線,這三款天線的結(jié)構(gòu)和功能分別是:(1)基于十字形結(jié)構(gòu)的超材料設(shè)計了一款中心頻率為2.345GHz的超材料加載±45°極化微帶天線,通過機械方式旋轉(zhuǎn)超材料表面可使天線改變?yōu)樗?垂直極化,從而實現(xiàn)極化可重構(gòu)。(2)基于正方形切角的超材料結(jié)構(gòu)設(shè)計了一款中心頻率為2.605GHz的超材料加載左/右旋圓極化微帶天線,通過機械方式旋轉(zhuǎn)超材料表面可使天線改變?yōu)樗?垂直極化,實現(xiàn)極化可重構(gòu)。(3)基于雙扇形結(jié)構(gòu)的超材料設(shè)計了一款中心頻率為2.605GHz的超材料加載左/右旋圓極化微帶天線,通過機械方式旋轉(zhuǎn)超材料表面可使天線改變?yōu)椤?5°極化,實現(xiàn)極化可重構(gòu)。運用電磁仿真軟件HFSS分別對三款天線進行了仿真設(shè)計和優(yōu)化設(shè)計,并對設(shè)計好的超材料加載縫隙耦合微帶天線進行了加工、測試。結(jié)果表明,本文設(shè)計的三款雙極化天線工作在TD-LTE頻段,能夠?qū)崿F(xiàn)預(yù)期的極化可重構(gòu),且在各種極化狀態(tài)下天線都具有良好的性能,達到了設(shè)計要求。
[Abstract]:Time Division Long Term Evolution (TD-LTET) is a wireless communication standard specially designed for mobile high broadband applications. In TD-LTE communication systems, multi-antenna and dual-polarization transmission techniques are often used to make full use of space resources and enhance the capacity of communication systems. In order to meet the need of flexible antenna performance in modern communication system, polarized reconfigurable antenna emerges as the times require. Polarization reconfigurable antenna can change the polarization mode of antenna and increase the application range of antenna, so it has a wide application prospect. In recent years, supermaterials of various structures have been emerging, and their special electromagnetic characteristics can be used in antenna design. The antenna can be polarized and reconfigurable by mechanical means. In order to avoid all kinds of problems caused by the bias device in the electronic controlled polarization reconfigurable antenna, it is simple and easy to realize. At present, the supermaterial loaded polarization reconfigurable microstrip antenna mostly works in the single polarization mode. The research of the supermaterial loaded polarization reconfigurable dual polarization microstrip antenna is rare, so, In this paper, the design and implementation of supermaterial loaded polarimetric reconfigurable dual polarization antenna for TD-LTE communication system is studied. The main work and results of this thesis can be summarized as follows: according to the theory of microstrip antenna, the slot coupled dual-polarized microstrip patch antenna working in TD-LTE band is designed. On the basis of this, three supermaterial loaded polarization reconfigurable dual-polarization antennas in TD-LTE band are designed by loading a layer of metamaterials with different structures. The structure and function of the three antennas are respectively 1: 1) based on the cross structure of the supermaterial, a supermaterial with center frequency of 2.345GHz loaded 鹵45 擄polarized microstrip antenna is designed. Rotating the surface of the metamaterials mechanically changes the antenna to horizontal / vertical polarization. Thus, polarization reconfigurable. 2) based on the square tangent angle supermaterial structure, a supermaterial loaded left / right circular polarized microstrip antenna with center frequency of 2.605GHz is designed. By mechanically rotating the surface of the metamaterial, the antenna can be changed to horizontal / vertical polarization, and the polarization can be reconfigurable. (3) based on the dual-sector structure, a supermaterial with center frequency of 2.605GHz loaded left / right circularly polarized microstrip antenna is designed. The antenna can be changed to 鹵45 擄polarization by mechanically rotating the surface of the metamaterial, and the polarization can be reconstructed. The electromagnetic simulation software HFSS is used to simulate and optimize the three antennas, and the microstrip antenna loaded with supermaterial is machined and tested. The results show that the three dual-polarization antennas designed in this paper work in the TD-LTE band and can realize the expected polarization reconfiguration. The antenna has good performance and meets the design requirements in various polarization states.
【學(xué)位授予單位】：大連海事大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN822;TN929.5

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