簡易檢索 / 詳目顯示

回結果列表
研究生： 陳彥廷
Chen, Yan-Ting
論文名稱： 基於電子式陣列天線之控制單元指向控制系統設計與性能分析
Design and Performance Analysis of a Pointing Control System for an Electronically Steered Array Antenna Control Unit
指導教授： 莊智清
Juang, Jyh-Ching
學位類別： 碩士
Master
系所名稱： 電機資訊學院 - 電機工程學系
Department of Electrical Engineering
論文出版年： 2026
畢業學年度： 114
語文別： 英文
論文頁數： 83
中文關鍵詞： 電子式陣列天線 、低軌道衛星 、兩行軌道要素 、簡化通用攝動模型 、波束指向控制 、天線控制單元
外文關鍵詞： Low Earth Orbit (LEO) Satellite, Electronically Steered Array (ESA), Beam Steering, Two-Line Element (TLE), Simplified General Perturbations 4 (SGP4), Antenna Pointing Control
相關次數： 點閱：67  下載：0 
分享至:
查詢本校圖書館目錄 查詢臺灣博碩士論文知識加值系統 勘誤回報

    • 近年來低軌道衛星通訊快速發展，Ku波段因具備高頻寬與高資料傳輸速率，已成為衛星通訊的重要頻段。然而其波束較窄，對天線指向精度要求較高，如何快速且精確地控制波束方向，已成為衛星地面站的重要研究議題。
    本研究提出一套基於電子式陣列天線控制單元之平台，整合兩行軌道要素形式之軌道資料、簡化通用攝動模型之軌道推算、方位角與仰角計算模組，以及天線控制介面。系統即時計算衛星位置資訊，將方位角/仰角轉換為天線控制角度，並透過通用非同步收發器介面傳送控制命令以完成波束指向控制，並建立電子式與機械式天線之比較分析方法，探討兩者於指向控制與系統架構上的差異。
    本研究已完成電子式陣列天線控制單元之控制平台開發、兩行軌道要素形式之軌道資料、簡化通用攝動模型之軌道推算之整合、方位角/仰角至Φ/θ模型建立及實體控制驗證。同時完成電子式與機械式天線近距離射頻量測平台建置與同相分量、正交分量訊號錄製，作為後續性能分析與系統優化之依據。

    In recent years, Low Earth Orbit (LEO) satellite communications have developed rapidly. Due to its high bandwidth and high data transmission rate, the Ku-band has become one of the most important frequency bands for satellite communications. However, its narrow beamwidth requires high pointing accuracy. Therefore, achieving fast and accurate beam steering has become a critical research topic for satellite user terminals .
    This study proposes a platform based on an electronically steered array (ESA) antenna control unit, integrating Two-Line Element (TLE)[1] orbital data, the Simplified General Perturbations 4 (SGP4)[2] orbit propagation model, azimuth and elevation angle calculation modules, and an antenna control interface. The system calculates satellite position information in real time, converts azimuth/elevation (Az/El) angles into Φ/θ control angles, and transmits control commands through a Universal Asynchronous Receiver/Transmitter (UART)[3] interface to accomplish beam pointing control.
    A complete processing framework is established, covering orbital data acquisition, orbit propagation, angle conversion, and electronically steered array antenna control. In addition, a comparative analysis method between electronically steered and mechanically steered antennas is developed to investigate the differences in pointing control mechanisms and system architectures.
    Major achievements include the development of orbital data with the SGP4[2] orbit propagation model, the establishment of the Az/El-to-Φ/θ conversion model, and Experiment validation of the control system. Furthermore, a near-field radio-frequency measurement platform for both electronically steered and mechanically steered antennas has been constructed, and in-phase (I) and quadrature (Q) signals have been recorded to serve as the basis for future performance evaluation and system optimization.

    摘要 1 Abstract 2 Acknowledgements 4 List of Tables 8 List of Figures 9 List of Abbreviations 12 Chapter 1 Introduction 14 1.1 Motivation and Objectives 14 1.2 Literature Review 15 1.3 Contributions 17 1.4 Thesis Overview 19 Chapter 2 System Overview and Method 21 2.1 Background and Challenges 21 2.2 Conventional Mechanical Ground Station Platform 23 2.3 Electronic Ground Station Platform 27 2.4 Algorithms 31 2.5 Implementation on the Rapidtek Phased-Array Antenna 38 2.6 Rapidtek Controller Command Format 39 2.7 RF Software 40 2.8 GNU Radio Block 41 2.9 RF Software Architecture 42 2.10 Architecture Diagram 43 2.11 Transmitter 45 2.12 DVB-S2 Format in NCKU SDR 46 2.13 NCKU RF Transmitted parameter 47 Chapter 3 Simulation 50 3.1 Simulation Parameter 51 3.2 Simulator Result 52 Chapter 4 Experiment Results 54 4.1 Experiment 1 55 4.2 Experiment 1 Equipment Setup 56 4.3 Experiment 1 parameter and Results 57 4.4 Experiments 2 and 3 58 4.5 Experiments 2 and 3 Equipment Setup 59 4.6 Experiment 2 parameters 60 4.7 Experiment 2 Results 61 4.8 Experiment 3 parameters 62 4.9 Experiment 3 Results 63 4.10 Experiment 4 64 4.11 Experiment 4 Equipment Setup 65 4.12 Experiment 4 parameters 66 4.13 Experiment 4 Results 67 4.13.1 Elevation Analysis 67 4.13.2 Azimuth Analysis 69 4.13.3 RF Signal Record 71 Chapter 5 Conclusion and Future Work 72 5.1 Conclusion 72 5.2 Future Work 73 References 74 Appendix A. Rapidtek Antenna Specifications 77 Appendix B. Rapidtek Control Commands 78 B.1 Up and Down Converter Control Command 78 B.2 Set Local Oscillator Frequency 79 B.3 Beam Steering Initialization 80 B.4 Beam Steering Angle Set 81

    [1]      Wikipedia contributors, “Two-line element set,” Wikipedia, The Free Encyclopedia. [Online]. Available: https://en.wikipedia.org/wiki/Two-line_element_set. Accessed: Aug. 14, 2026.
    [2]      Wikipedia contributors, “Simplified perturbations models,” Wikipedia, The Free Encyclopedia. [Online]. Available: https://en.wikipedia.org/wiki/Simplified_perturbations_models. Accessed: Aug. 14, 2026.
    [3]      Wikipedia contributors, “Universal asynchronous receiver-transmitter,” Wikipedia, The Free Encyclopedia. [Online]. Available: https://en.wikipedia.org/wiki/Universal_asynchronous_receiver-transmitter. Accessed: Aug. 14, 2026.
    [4]      Ansys, “Ansys STK (Systems Tool Kit),” Ansys. [Online]. Available: https://www.ansys.com/zh-tw/products/missions/ansys-stk. Accessed: Jul. 13, 2026.
    [5]      Wikipedia contributors, “Low-noise block downconverter,” Wikipedia, The Free Encyclopedia. [Online]. Available: https://en.wikipedia.org/wiki/Low-noise_block_downconverter. Accessed: Aug. 14, 2026.
    [6]      I. G. Auad, “gr-dvbs2rx,” GitHub. [Online]. Available: https://github.com/igorauad/gr-dvbs2rx. Accessed: Jun. 25, 2026.
    [7]      G. Bradski, “The OpenCV Library,” Dr. Dobb’s Journal of Software Tools, 2000.
    [8]      OpenCV Team, “Open Source Computer Vision Library (OpenCV), Version 4.6.0,” OpenCV. [Online]. Available: https://opencv.org/. Accessed: Aug. 14, 2026.
    [9]      S.-E. Huang, P.-H. Chang, X.-L. Lu, and J.-C. Juang, “A Satcom On-the-Move Phased-Array Antenna Tracking Algorithm on Robot Operating System,” in Proc. 23rd International Conference on Control, Automation and Systems (ICCAS), Yeosu, Korea, Oct. 17–20, 2023, pp. 1060–1062.
    [10]   Rapidtek Technologies Inc., “Non-Terrestrial Network Products – Phased Array Antenna Module (Rx),” Rapidtek Technologies. [Online]. Available: https://rapidtek.net/en/products/fcff89e3e4861a7e318b20df0d2f83f9. Accessed: Jul. 13, 2026.
    [11]   C. Newman, “SGP.NET: C# SGP4 Satellite Prediction Library,” GitHub. [Online]. Available: https://github.com/parzivail/SGP.NET. Accessed: Jun. 25, 2026.
    [12]   European Telecommunications Standards Institute (ETSI), “Digital Video Broadcasting (DVB); Second Generation Framing Structure, Channel Coding and Modulation Systems for Broadcasting, Interactive Services, News Gathering and Other Broadband Satellite Applications (DVB-S2),” ETSI EN 302 307 V1.2.1, Apr. 2009. [Online]. Available: https://www.etsi.org/deliver/etsi_en/302300_302399/302307/01.02.01_60/en_302307v010201p.pdf. Accessed: Aug. 14, 2026.
    [13]   W.-J. Siao, “Design and Implementation of an Interstellar Communication Transceiver Architecture Based on the DVB-S2 (Digital Video Broadcasting-Satellite-Second Generation) Protocol,” M.S. thesis, Department of Electrical Engineering, National Cheng Kung University, Tainan, Taiwan, Jul. 2025.
    [14]   MathWorks, “MATLAB,” MathWorks. [Online]. Available: https://www.mathworks.com/products/matlab.html. Accessed: Jul. 15, 2026.
    [15]   National Cheng Kung University, “NCKU CubeSats Reach Another Milestone: Lilium-2 and Lilium-3 Head for Space,” Nov. 10, 2025. [Online]. Available: https://web.ncku.edu.tw/p/406-1000-289645,r3822.php?Lang=zh-tw. Accessed: Aug. 14, 2026.
    [16]   GNU Radio, “File Sink,” GNU Radio Wiki. [Online]. Available: https://wiki.gnuradio.org/index.php/File_Sink. Accessed: Jul. 15, 2026.

    QR CODE