本文選題：雙極化天線　切入點：全向　出處：《西安電子科技大學》2014年碩士論文　論文類型：學位論文

【摘要】：隨著無線通信技術的快速發(fā)展，頻率資源變得日益緊張，人們對無線通信的需求不再局限于簡單的語音通訊，對流媒體信號的需求變得十分迫切。因此，利用有限的頻譜資源提高信號的傳輸速度和質(zhì)量具有重要意義。 雙極化天線能夠有效提高頻譜效率和緩解發(fā)射機與接收機之間的極化失配，，解決多徑衰落問題。同時，雙極化天線也可替代兩個不同極化的天線單元，減少天線數(shù)量，降低整機成本。在移動遙測、室內(nèi)定位、無線接入點和便攜式移動基站等點對多點的小型化通信系統(tǒng)中，天線的輻射方向圖應具有良好的全向性。因此，全向雙極化天線具有廣泛的應用前景。 論文設計了兩種小型化全向雙極化天線，成功解決了空間受限無線通信系統(tǒng)天線設計的兩個主要難題：一個是實現(xiàn)小尺寸天線在垂直/水平極化模式下的全向輻射問題；另一個是降低小尺寸天線兩種極化的互耦問題。 論文首先設計了一種工作于WLAN2.4GHz頻段的緊湊型全向雙極化高隔離度縫隙天線。該天線通過在金屬地板上開兩條正交縫隙，實現(xiàn)天線在兩種極化狀態(tài)下的全向輻射。該天線兩種極化模式下增益均大于1.35dBi，端口隔離度高于35dB，其尺寸僅為0.4880×0.0810×0.0810；其次，針對低剖面無線通信系統(tǒng)，論文設計了一種工作于WLAN2.4GHz頻段的低剖面全向雙極化天線。該天線通過將兩個極化正交的全向天線組合在一起，實現(xiàn)其在不同極化模式下的全向輻射。該天線兩種極化模式下增益均大于0.44dBi，端口隔離度高于23.9dB，其整體尺寸只有0.630×0.630×0.0570。
[Abstract]:With the rapid development of wireless communication technology, the frequency resources become increasingly tight, people's demand for wireless communication is no longer limited to simple voice communication, and the demand for streaming media signal becomes very urgent. It is of great significance to improve the speed and quality of signal transmission by using limited spectrum resources. Dual polarization antenna can effectively improve spectrum efficiency, alleviate polarization mismatch between transmitter and receiver, and solve the problem of multipath fading. At the same time, dual polarization antenna can also replace two different polarization antenna units and reduce the number of antennas. Reduce the cost of the whole machine. In the miniaturized multipoint communication systems such as mobile telemetry, indoor positioning, wireless access point and portable mobile base station, the radiation pattern of the antenna should have good overall orientation. The omnidirectional dual polarization antenna has a wide application prospect. In this paper, two miniaturized omnidirectional dual-polarization antennas are designed, which successfully solve the two main problems in the antenna design of space-limited wireless communication systems: one is to realize the omnidirectional radiation of small size antennas in vertical / horizontal polarization mode; The other is to reduce the mutual coupling between the two kinds of polarization of the small size antenna. In this paper, a compact omnidirectional dual-polarization high-isolation slot antenna working in the WLAN2.4GHz band is first designed. The antenna is designed by opening two orthogonal slots on the metal floor. The omnidirectional radiation of the antenna is realized in two polarization states. The gain of the antenna is greater than 1.35dBi. the isolation degree of the antenna is higher than 35dB, and its size is only 0.4880 脳 0.0810 脳 0.0810.The second, for the low profile wireless communication system, In this paper, a low-profile omnidirectional dual-polarization antenna working in the WLAN2.4GHz band is designed, which combines two perpendicular omnidirectional antennas. The gain of the antenna is greater than 0.44dBi. the isolation degree of the antenna is higher than 23.9dB. the overall size of the antenna is only 0.630 脳 0.630 脳 0.0570.
【學位授予單位】：西安電子科技大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN821.1

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