本文選題：衛(wèi)星通信　切入點(diǎn)：寬角　出處：《西安電子科技大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：衛(wèi)星通訊系統(tǒng)在國(guó)防工業(yè)和民用經(jīng)濟(jì)領(lǐng)域發(fā)揮著不可替代的重要作用,隨著現(xiàn)代信息化的快速發(fā)展,許多國(guó)家都建立了基于本國(guó)技術(shù)保障的衛(wèi)星通信系統(tǒng),包括導(dǎo)航衛(wèi)星系統(tǒng)、探測(cè)衛(wèi)星系統(tǒng)、中繼衛(wèi)星系統(tǒng)等等。在這些衛(wèi)星通訊系統(tǒng)中,為了保證所傳遞的信息的可靠性,都需要對(duì)應(yīng)用于其中的天線做全方位的考慮與研究。本文主要研究了可應(yīng)用于機(jī)載或車載衛(wèi)星通信系統(tǒng)的寬角覆蓋圓極化天線�？紤]到應(yīng)用環(huán)境的特殊性,本文采用圓錐螺旋這種立體結(jié)構(gòu)來(lái)實(shí)現(xiàn)寬角度的圓極化覆蓋特性。首先,本文詳細(xì)的論述了本課題的研究背景,全面敘述了本課題面臨的研究難點(diǎn)和其研究?jī)r(jià)值,簡(jiǎn)要介紹了可應(yīng)用于機(jī)載或車載衛(wèi)星通信領(lǐng)域的寬角覆蓋圓極化天線的國(guó)外研究現(xiàn)狀。其次,介紹了非頻變螺旋天線和四臂螺旋天線這兩種常見(jiàn)的螺旋結(jié)構(gòu)的基本理論,隨后系統(tǒng)的闡述了可以和這兩種螺旋結(jié)構(gòu)相配合的寬帶饋電結(jié)構(gòu)的理論基礎(chǔ)。在掌握這些理論的基礎(chǔ)上,按照設(shè)計(jì)指標(biāo)要求同時(shí)全面考慮了環(huán)境的影響,設(shè)計(jì)了兩種可應(yīng)用于機(jī)載或車載的寬角覆蓋圓極化天線。一、根據(jù)非頻變螺旋天線和寬帶巴倫結(jié)構(gòu)理論基礎(chǔ),設(shè)計(jì)了一副雙臂螺旋天線,實(shí)現(xiàn)了寬波束、小型化和寬頻帶性能。二、根據(jù)四臂螺旋天線原理,設(shè)計(jì)了圓錐形四臂螺旋天線,并對(duì)功分、移相網(wǎng)絡(luò)和天線進(jìn)行了一體化設(shè)計(jì)。在實(shí)現(xiàn)寬波束和小型化特性的基礎(chǔ)上,進(jìn)一步改善了后瓣特性。論文首先對(duì)天線進(jìn)行了模擬仿真分析,其次根據(jù)優(yōu)化后的天線模型加工和安裝了天線樣件,最后測(cè)量了天線樣件的主要電性能。對(duì)比計(jì)算機(jī)仿真和樣件測(cè)試的結(jié)果可知,所設(shè)計(jì)的天線可以滿足工程需要。
[Abstract]:Satellite communication systems play an irreplaceable role in the fields of national defense industry and civil economy. With the rapid development of modern information technology, many countries have established satellite communication systems based on their own technology support, including navigation satellite systems. Detection satellite systems, relay satellite systems, etc. In these satellite communication systems, in order to ensure the reliability of the information transmitted, In this paper, we mainly study the wide-angle coverage circular polarization antenna which can be used in the airborne or vehicle-borne satellite communication system. Considering the particularity of the application environment, In this paper, the conical helix is used to realize the circular polarization coverage with wide angle. Firstly, the research background of this topic is discussed in detail, and the research difficulties and its research value are described. This paper briefly introduces the research status of wide-angle coverage circularly polarized antenna which can be used in the field of airborne or vehicle-borne satellite communication. Secondly, the basic theories of non-frequency variable helical antenna and four-arm helical antenna are introduced. Then the theoretical basis of the broadband feed structure which can be matched with these two spiral structures is systematically expounded. On the basis of mastering these theories, the influence of the environment is considered comprehensively according to the requirements of the design index. Two kinds of wide-angle coverage circularly polarized antennas are designed for airborne or vehicle-borne applications. Firstly, according to the theory of non-frequency variable helical antennas and broadband Barron structure, a pair of dual-arm helical antennas is designed, and a wide beam is realized. Secondly, according to the principle of four-arm helical antenna, the conical four-arm spiral antenna is designed, and the power division, phase-shift network and antenna are integrated. On the basis of realizing the characteristics of wide beam and miniaturization, the conical four-arm helical antenna is designed. The characteristics of the back lobe are further improved. Firstly, the antenna is simulated and analyzed, and then the antenna sample is fabricated and installed according to the optimized antenna model. Finally, the main electrical properties of the antenna sample are measured, and the results of computer simulation and sample test show that the designed antenna can meet the engineering needs.
【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN821.1

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