【摘要】：在射電天文領(lǐng)域,對于目前規(guī)模越來越大的射電望遠(yuǎn)鏡陣列,為了讓能夠讓陣列中的若干臺射電天線協(xié)同工作,高精度的相位差檢測尤為重要。在相位差的檢測中,參考信號以及時鐘信號的精度都將對最終結(jié)果造成影響,如何選擇合適的時鐘信號以及參考信號,如何將這些模塊進(jìn)行合理的架構(gòu)整合將是本文需要去嘗試研究并解決的重點。在此背景下,本文將提出一種能夠適用于射電天文學(xué)領(lǐng)域的天線相位差檢測裝置,該裝置基于AD8302芯片進(jìn)行設(shè)計并進(jìn)行試驗驗證,通過實驗結(jié)果探討所遇到的問題以及相關(guān)解決方案。 本文共分為五章。第一章緒論簡要概括了射電天文學(xué)發(fā)展史以及課題背景；第二章綜述了相位差檢測的傳統(tǒng)方法以及這些方法的優(yōu)缺點,從中選擇最適合課題的理論方法,并最終確定了基本的設(shè)計思路；第三章則是針對當(dāng)前項目背景下的相位差檢測設(shè)計思路做出概述,其中包括了芯片模塊的構(gòu)成以及所需要的元器件等,并通過知識產(chǎn)權(quán)核在開發(fā)板上生成理想的DDS參考信號；第四章是本文總結(jié)了前人的經(jīng)驗之后,通過對相位差檢測的學(xué)習(xí)和理解,對基于AD8302的相位差檢測模塊進(jìn)行了設(shè)計并進(jìn)行了試驗驗證,總體結(jié)果達(dá)到要求。最后一章總結(jié)了設(shè)計過程中所遇到的問題以及所收獲的成果,并結(jié)合目前的科技發(fā)展趨勢對系統(tǒng)中的不足之處提出了改進(jìn)設(shè)想。
[Abstract]:In the field of radio astronomy, in order to enable several radio antennas in the array to work together, high precision phase difference detection is particularly important for the larger and larger radio telescope arrays. In the detection of phase difference, the accuracy of the reference signal and the clock signal will affect the final result, how to select the appropriate clock signal and the reference signal, How to integrate these modules reasonably will be the focus of this paper. Under this background, this paper will propose a antenna phase difference detection device which can be used in the field of radio astronomy. The device is designed based on AD8302 chip and verified by experiments. Through the experimental results, the problems encountered and related solutions are discussed. This paper is divided into five chapters. The first chapter briefly summarizes the development history and background of radio astronomy. In the second chapter, the traditional methods of phase difference detection and the advantages and disadvantages of these methods are summarized, from which the most suitable theoretical methods are selected, and the basic design ideas are finally determined. The third chapter is an overview of the design idea of phase difference detection under the background of the current project, including the composition of the chip module and the required components, and generates the ideal DDS reference signal on the development board through the intellectual property core. The fourth chapter is after summing up the previous experience, through the study and understanding of phase difference detection, the phase difference detection module based on AD8302 is designed and verified by experiments, and the overall results meet the requirements. In the last chapter, the problems encountered in the design process and the achievements are summarized, and the improvement ideas are put forward according to the current development trend of science and technology.
【學(xué)位授予單位】：云南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN820

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本文編號：2492615