本文選題：雷達(dá)系統(tǒng) + 頻率合成��； 參考：《電子科技大學(xué)》2014年碩士論文

【摘要】：現(xiàn)代無(wú)線通信系統(tǒng)的快速發(fā)展,使得通信系統(tǒng)對(duì)頻率合成技術(shù)的要求越來(lái)越高,尤其是在軍事雷達(dá)系統(tǒng)中,頻率合成技術(shù)的一些重要指標(biāo)會(huì)對(duì)整個(gè)雷達(dá)系統(tǒng)產(chǎn)生重要影響。論文首先對(duì)國(guó)內(nèi)外雷達(dá)系統(tǒng)頻率合成技術(shù)的發(fā)展現(xiàn)狀作簡(jiǎn)要介紹,為論文的開展作鋪墊和對(duì)比。本文在第二章介紹了頻率合成技術(shù)的基本概念、主要技術(shù)指標(biāo)以及測(cè)試頻綜模塊目前常用的三種基本的頻率合成方式等。根據(jù)這幾種頻率合成技術(shù)分別展開介紹,分析其優(yōu)缺點(diǎn),為論文中雷達(dá)系統(tǒng)測(cè)試頻綜模塊的方案制定作理論鋪墊。由于本文主要是以直接數(shù)字頻率合成技術(shù)為基礎(chǔ)進(jìn)行研究實(shí)現(xiàn)的,因此對(duì)直接數(shù)字頻率合成技術(shù)的工作原理進(jìn)行了詳細(xì)的介紹,分析直接數(shù)字頻率合成技術(shù)的基本結(jié)構(gòu)特點(diǎn)、頻譜組成以及其在現(xiàn)代通信領(lǐng)域中的廣泛應(yīng)用。論文第三章和第四章對(duì)頻率合成方案的設(shè)計(jì)和模塊的實(shí)現(xiàn)進(jìn)行重點(diǎn)介紹。首先論文給出了項(xiàng)目的來(lái)源、用途等,根據(jù)具體的項(xiàng)目要求進(jìn)行分析總結(jié)。論文通過(guò)對(duì)測(cè)試頻綜模塊指標(biāo)的仔細(xì)分析,給出兩種設(shè)計(jì)方案,一種是傳統(tǒng)的頻率合成方案,另外一種是基于AD9914的方案。通過(guò)對(duì)兩種方案的分析比較,選擇適合該項(xiàng)目要求的頻率合成方案,并且把該頻率合成方案能達(dá)到的目標(biāo)和項(xiàng)目要求的指標(biāo)作分析和對(duì)比,即給出該方案相應(yīng)的可行性分析和說(shuō)明。方案制定完成之后就需要對(duì)相關(guān)芯片進(jìn)行選型、介紹,以及給出PCB板圖和腔體的設(shè)計(jì)過(guò)程,最終實(shí)現(xiàn)了該測(cè)試頻綜模塊的硬件電路。論文最后的工作就是對(duì)所研制的模塊進(jìn)行調(diào)試和測(cè)試。文中給出了大量的模塊測(cè)試圖,包括示波器、頻譜儀以及信號(hào)源分析儀的測(cè)試圖,并且對(duì)測(cè)試結(jié)果進(jìn)行分析說(shuō)明,以驗(yàn)證該模塊是否滿足項(xiàng)目指標(biāo)要求。最后還要把此模塊放到整個(gè)Ku波段雷達(dá)測(cè)試系統(tǒng)中進(jìn)行測(cè)試和系統(tǒng)連調(diào),通過(guò)對(duì)整個(gè)系統(tǒng)的測(cè)試后,再對(duì)該測(cè)試頻綜模塊作進(jìn)一步的改進(jìn)。論文在最后還總結(jié)該方案具體實(shí)現(xiàn)中所遇到的困難和不足之處,提出改進(jìn)方法,對(duì)該基于AD9914的測(cè)試頻綜模塊的進(jìn)一步研究作鋪墊,以更好的滿足項(xiàng)目的指標(biāo)要求。
[Abstract]:With the rapid development of modern wireless communication system, the requirement of frequency synthesis technology is becoming higher and higher. Especially in military radar system, some important indexes of frequency synthesis technology will have an important impact on the whole radar system. Firstly, this paper briefly introduces the development of frequency synthesis technology of radar system at home and abroad, which provides a basis and contrast for the development of this paper. In the second chapter, the paper introduces the basic concept of frequency synthesis technology, main technical specifications and three basic frequency synthesis methods commonly used in testing frequency synthesis module. According to these frequency synthesis techniques, the advantages and disadvantages of these techniques are analyzed, which lays a theoretical foundation for the scheme of radar system testing frequency synthesis module in this paper. Since this paper is mainly based on the direct digital frequency synthesis technology, the working principle of the direct digital frequency synthesis technology is introduced in detail, and the basic structural characteristics of the direct digital frequency synthesis technology are analyzed. Spectrum composition and its wide application in the field of modern communication. The third and fourth chapters focus on the design of the frequency synthesis scheme and the implementation of the module. First of all, the paper gives the source of the project, uses and so on, according to the specific project requirements for analysis and summary. Through the careful analysis of the index of the test frequency ensemble module, two design schemes are given, one is the traditional frequency synthesis scheme, the other is the scheme based on AD9914. Through the analysis and comparison of the two schemes, the frequency synthesis scheme suitable for the project requirements is selected, and the objectives that the frequency synthesis scheme can achieve and the targets of the project requirements are analyzed and compared. The feasibility analysis and explanation of the scheme are given. It is necessary to select the relevant chips, introduce the PCB board diagram and the design process of the cavity, and finally realize the hardware circuit of the test frequency synthesizer module. The final work of this paper is to debug and test the developed module. In this paper, a large number of module test diagrams, including oscilloscope, spectrometer and signal source analyzer, are given, and the test results are analyzed and explained to verify whether the module meets the requirements of the project. Finally, this module is put into the whole Ku-band radar test system to test and adjust the system. After the whole system is tested, the testing frequency synthesis module is further improved. Finally, the paper summarizes the difficulties and shortcomings in the implementation of the scheme, and puts forward an improved method to pave the way for further research of the test frequency ensemble module based on AD9914, so as to better meet the requirements of the project.
【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)】：TN741;TN958

【參考文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 袁文;高分辨率低雜散頻綜的研制[D];電子科技大學(xué);2004年

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本文編號(hào)：1813896