本文選題：圓極化 + 寬波束��； 參考：《東南大學(xué)》2017年碩士論文

【摘要】：在衛(wèi)星通信、導(dǎo)航、雷達等通訊系統(tǒng)中,線極化天線難以滿足愈發(fā)嚴(yán)格的要求,而圓極化天線具有低極化損耗、抗多徑干擾等眾多的優(yōu)點,因此圓極化天線得到了越來越普遍的應(yīng)用。其中衛(wèi)星通信系統(tǒng)在近二十年來發(fā)展迅速,對圓極化天線的性能也提出了更加嚴(yán)格的要求。本文以國家自然科學(xué)基金項目"立體多面圓極化天線"為背景,仿真研究了新型的單饋和雙饋的立體多面圓極化天線。本文的主要貢獻點不僅包括了可以指導(dǎo)新型圓極化天線設(shè)計的理論分析和設(shè)計方法,還提供了一款具有實用價值的寬波束圓極化天線。本文的主要工作是:1)分析解明影響圓極化天線軸比波束寬度的因素。通過理論分析與仿真計算驗證相結(jié)合的方法,分別分析了天線的主向軸比和寬角度軸比的變化機制;導(dǎo)出了圓極化的兩個正交極化分量之間的幅度誤差和相位誤差對軸比影響的公式;仿真分析了天線軸比波束寬度與天線結(jié)構(gòu)尺寸和基板材料的關(guān)系,得出了一系列可以指導(dǎo)圓極化天線設(shè)計的結(jié)論。2)提出了一種單饋點立體翻折圓極化天線結(jié)構(gòu),該天線通過貼片翻折來保證優(yōu)良的半功率波束寬度和3 dB軸比波束寬度;分析了貼片翻折與天線波束寬度的關(guān)系;給出了單饋點立體翻折圓極化天線的設(shè)計步驟;仿真結(jié)果顯示該天線的半功率波束寬度達到110°、3 dB軸比波束寬度達到200°以上;測試結(jié)果與仿真結(jié)果基本吻合,驗證了仿真工作的可靠性。本文的研究工作為設(shè)計寬軸比波束的圓極化天線提供了新的技術(shù)途徑,有助于新型立體多面圓極化天線的研制。
[Abstract]:In satellite communication, navigation, radar and other communication systems, linear polarization antenna is difficult to meet the increasingly stringent requirements, while circular polarization antenna has many advantages, such as low polarization loss, anti-multipath interference and so on.Therefore, circular polarization antenna has been more and more widely used.The satellite communication system has developed rapidly in the past twenty years, and the performance of circularly polarized antenna is required more strictly.In this paper, based on the project of National Natural Science Foundation of China, "Three-Dimensional Multiplanar Circular polarization Antenna", a new type of single-fed and double-fed stereoscopic multiplanar circularly polarized antenna is simulated and studied.The main contributions of this paper include not only the theoretical analysis and design methods which can guide the design of the new circular polarization antenna, but also a wide beam circular polarization antenna with practical value.The main work of this paper is to analyze the factors that affect the beam width of circular polarization antenna.The main axis ratio and the wide angle axial ratio of the antenna are analyzed by combining the theoretical analysis with the simulation calculation.The effects of amplitude error and phase error on axial ratio between two quadrature polarization components of circular polarization are derived, and the relationship between antenna axial ratio beam width and antenna structure size and substrate material is simulated and analyzed.A series of conclusions which can guide the design of circular polarization antenna are obtained. (2) A single feed point stereoscopic folded circular polarization antenna structure is proposed, which can guarantee the excellent half-power beam width and 3dB axial ratio beam width by patch folding.The relationship between patch folding and antenna beam width is analyzed, the design steps of single feed point stereoscopic folded circular polarization antenna are given, and the simulation results show that the half-power beam width of the antenna reaches 110 擄/ 3 dB axis ratio beam width above 200 擄.The test results are in good agreement with the simulation results, and the reliability of the simulation work is verified.The research work in this paper provides a new technical approach for the design of circular polarization antenna with wide axial ratio beam, and is helpful to the development of a new stereoscopic multiplanar circular polarization antenna.
【學(xué)位授予單位】：東南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN821.1

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