發(fā)布時間：2019-05-21 16:56

【摘要】：近年來,無線通訊技術(shù)快速發(fā)展,無線通信系統(tǒng)所分配的頻譜變得異常擁擠,不斷增長的無線業(yè)務(wù)需求和日益嚴重的頻譜資源匱乏的問題,成為了無線通信發(fā)展的阻礙。在這一背景下,研究人員提出了利用軌道角動量復(fù)用技術(shù)提升無線通信容量的想法。軌道角動量復(fù)用作為一種新的無線通信領(lǐng)域的復(fù)用技術(shù),其理論基礎(chǔ)來源于量子力學(xué)中的軌道角動量理論,如果該技術(shù)能投入實際運用,可以將無線通信的帶寬極大地拓寬,有效地提升頻譜利用率。因此,軌道角動量天線的研究對無線通信發(fā)展有著重要意義。本文針對這一研究熱點,對軌道角動量天線進行了探索和研究。文章介紹了渦旋電磁波的研究背景及意義,回顧了近年來國內(nèi)外軌道角動量天線的研究動態(tài)并進行總結(jié)。同時,文章闡述了軌道角動量相關(guān)的理論基礎(chǔ),為后面天線設(shè)計提供理論支持。本文提出了一種新的實現(xiàn)軌道角動量方法,并基于此方法設(shè)計了一種軌道角動量喇叭天線。設(shè)計原理是基于圓波導(dǎo)中極化簡并模式組合可得到相位因子的特點,理論分析表明利用波導(dǎo)中的mnTE或mnTM模式,可得到?m和?(m-1)階的軌道角動量。本文用HFSS和FEKO兩種軟件進行仿真驗證,天線工作在x波段,用兩個端口饋電以實現(xiàn)正交極化簡并模式疊加,結(jié)果表明在電場r,?分量可得到±2階軌道角動量,電場y,x分量得到±1階軌道角動量。且加工測試結(jié)果與仿真結(jié)果一致。本文將所設(shè)計天線作為拋物面饋源進行探討,拋物面設(shè)計符合軌道角動量電磁波特點。增加拋物面反射后可以顯著提高天線增益,減小波束空心化范圍;經(jīng)拋物面反射后軌道角動量的階數(shù)與饋源本身的階數(shù)互為相反數(shù),即渦旋的旋向相反。
[Abstract]:In recent years, with the rapid development of wireless communication technology, the spectrum allocated by wireless communication system has become extremely crowded, the growing demand for wireless services and the increasing shortage of spectrum resources have become obstacles to the development of wireless communication. In this context, researchers put forward the idea of using orbital angular momentum reuse technology to improve wireless communication capacity. As a new reuse technology in the field of wireless communication, orbital angular momentum reuse is based on the orbital angular momentum theory in quantum mechanics. if this technology can be put into practical application, the bandwidth of wireless communication can be greatly broadened. Effectively improve spectrum efficiency. Therefore, the research of orbital angular momentum antenna is of great significance to the development of wireless communication. In this paper, the orbital angular momentum antenna is explored and studied. In this paper, the research background and significance of vortex electromagnetic wave are introduced, and the research trends of orbital angular momentum antenna at home and abroad in recent years are reviewed and summarized. At the same time, the theoretical basis of orbital angular momentum correlation is described, which provides theoretical support for the design of the rear antenna. In this paper, a new method for realizing orbital angular momentum is proposed, and a orbital angular momentum horn antenna is designed based on this method. The design principle is based on the characteristic that the phase factor can be obtained by the combination of polarization degeneracy modes in circular waveguides. Theoretical analysis shows that the orbital angular momentum of order m and (m 鈮，

本文編號：2482245