【摘要】：當(dāng)前,衛(wèi)星通信由于其諸多優(yōu)點(diǎn)越來越多地應(yīng)用在應(yīng)急通信、全球遠(yuǎn)距離通信、軍事通信等領(lǐng)域。衛(wèi)星通信頻段分布較多,為了進(jìn)一步開拓太空衛(wèi)星資源,國(guó)家在UHF波段衛(wèi)星通信領(lǐng)域進(jìn)行了相應(yīng)的開發(fā)。現(xiàn)階段,UHF波段衛(wèi)星通信采用圓極化衛(wèi)星通信天線,圓極化天線具有良好的抑制雨霧的去極化效應(yīng)和抗多徑反射效應(yīng)等特點(diǎn)。本課題旨在設(shè)計(jì)一款具有良好圓極化特性、較寬頻帶和較高增益的UHF衛(wèi)星通信天線。首先,論文介紹了當(dāng)前衛(wèi)星通信天線的發(fā)展及動(dòng)態(tài),提出了本課題研究的目的和意義,同時(shí)對(duì)論文研究的主要內(nèi)容和論文的結(jié)構(gòu)安排進(jìn)行了說明。其次,結(jié)合本課題在天線設(shè)計(jì)中所使用的Ansoft HFSS天線仿真軟件,對(duì)Ansoft HFSS的基本概念、特點(diǎn)和使用方法等作了介紹。接下來,介紹了天線及陣列天線的基本理論和概念,對(duì)天線、直線陣和平面陣的一些主要參數(shù)進(jìn)行分析說明。特別地,對(duì)本課題采取的印刷偶極子天線、縫隙天線、電磁互補(bǔ)型天線、Wilkinson功分器和阻抗變換器進(jìn)行了詳細(xì)的說明。最后,闡述了新型雙波段衛(wèi)星通信天線的具體建模仿真和優(yōu)化設(shè)計(jì)工作。分三部分研究分析:新型電磁偶極子天線單元、陣列饋電網(wǎng)絡(luò)、陣列天線布局與間距。分析電磁偶極子天線的模型、原理、帶寬特性、圓極化和增益特性等;分析饋電網(wǎng)絡(luò)的反射特性和傳輸特性,對(duì)其中的微帶型Wilkinson功分器進(jìn)行了優(yōu)化分析;分析陣列天線的陣列布局和陣元間距對(duì)陣列天線性能的影響。對(duì)于本課題的衛(wèi)星通信陣列天線如何滿足要求做了大量工作,利用Ansoft HFSS對(duì)天線關(guān)鍵參數(shù)進(jìn)行了優(yōu)化分析,得出了大量的數(shù)據(jù),并研制出了最終的天線。
[Abstract]:At present, satellite communication is more and more used in emergency communication, global remote communication, military communication and other fields because of its many advantages. There are many frequency bands in satellite communication. In order to further develop the space satellite resources, the country has carried on the corresponding development in the UHF band satellite communication domain. At present, circularly polarized satellite communication antenna is used in UHF band satellite communication. Circular polarization antenna has good characteristics of restraining depolarization effect of rain and fog and anti-multipath reflection effect. The purpose of this paper is to design a UHF satellite antenna with good circular polarization, wide band and high gain. Firstly, the paper introduces the development and development of satellite communication antenna, puts forward the purpose and significance of this research, and explains the main contents and structure of the thesis. Secondly, combined with the Ansoft HFSS antenna simulation software used in antenna design, the basic concept, characteristics and application methods of Ansoft HFSS are introduced. Then, the basic theory and concept of antenna and array antenna are introduced, and some main parameters of antenna, linear array and plane array are analyzed and explained. In particular, the printed dipole antenna, slot antenna, electromagnetic complementary antenna, Wilkinson power divider and impedance converter are described in detail. Finally, the modeling, simulation and optimization design of the new dual-band satellite communication antenna are described. It is divided into three parts: new electromagnetic dipole antenna unit, array feed network, array antenna layout and spacing. The model, principle, bandwidth, circular polarization and gain characteristics of the electromagnetic dipole antenna are analyzed, the reflection and transmission characteristics of the feed network are analyzed, and the microstrip Wilkinson power divider is optimized. The effect of array layout and array cell spacing on array antenna performance is analyzed. A great deal of work has been done on how to meet the requirements of the satellite communication array antenna in this paper. The key parameters of the antenna are optimized and analyzed by Ansoft HFSS, a large number of data are obtained, and the final antenna is developed.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN828.5

【參考文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 應(yīng)熒瑩;寬帶雙頻Wilkinson功分器的研究和設(shè)計(jì)[D];北京郵電大學(xué);2010年

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本文編號(hào)：2272929