環狀陣列天線頻率操作頻率為10GHz，具由 23 個子陣列天線搭配二維龍伯透 鏡組合而成，每個子陣列天線由 8 個韋瓦第單元天線和一分八路的 T 型功率分配 器所構成，經由量測驗證，每個子陣列增益為11.43dB，輻射效率為 49.07%；二維 龍伯透鏡做為環狀陣列的波束成型網路，其柱對稱的結構易於與子陣列天線整合， (3.5GHz)可提供約 30dB 的增益，RF 端最大輸入功率為-25dBm；切換電路電路負 責切換激發環狀陣列天線的饋入端口，使整個系統達到電子式掃描，於10GHz 路 徑的損耗為 5.8dB；鎖相迴路振盪器做為 LO 端口的訊號源，能產生 3.4GHz 到 6.8GHz 的乾淨單一頻率，於 6.5GHz 的輸出功率為-6dBm。
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透過第五章的測試，將環狀陣列天線和切換電路結合，進行球面進場量測，驗 證了電子式掃描的功能，隨後將環狀陣列天線與升降頻系統組合，與標準天線對打，
驗證升降頻系統能夠提供環狀陣列天線額外增益，最後將整個系統分別使用 M3FORCE 公司的 C1056B 和 NI 公司的 USRP 測證，驗證整個系統對數位訊號傳 輸的應用可行性。
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參考文獻
[1] 陳欣倫，UAV 納入陸戰隊情監偵運用之研究，海軍學術雙月刊，51(2)，27-42，2017 年。
[2] 熊治民，台灣無人機服務應用現況與趨勢，機械工業雜誌，448，10-17，2020 年。
[3] NASA, Unmanned Aircraft Systems Traffic Management, Retrieved from https://utm.arc.nasa.gov/index.shtml
[4] P. J. Gibson, The Vivaldi Aerial, 9th European Microwave Conference, pp. 101-105, 1979.
[5] K. S. Yngvesson, D. H. Schaubert, T. L. Korzeniowski, E. L. Kollberg, T. Thungren, and J. F. Johansson, Endfire Tapered Slot Antennas on Dielectric Substrtates, IEEE Trans. Antennas and Propagation, vol. AP-33, no. 12, pp. 1392-1400, 1985.
[6] J. Shin and D. H. Schaubert, A Parameter Study of Stripline-Fed Vivaldi Notch-Antenna Arrays, IEEE Transactions on Notch-Antennas and Propagation, vol. 45, no. 5, pp. 879-886, 1999.
[7] D.M. Pozar, Microwave Engineering, 4th ED. New York: Wiley, 2011.
[8] 張尚哲，陣列天線遠近場聚焦多波束輻射之龍伯透鏡波束成型電路應用，博 士論文，元智大學電機工程學系，2020 年
[9] H.-T. Chou, S.-C. Chang, and H.-J. Huang, Multibeam radiations from circular periodic array of Vivaldi antennas excited by an integrated 2-D Luneburg lens beamforming network, IEEE Antennas Wireless Propag. Lett., vol. 19, no. 9, pp.
1486–1490, 2020.
[10] Constantine A. Balanis, Antenna Theory: Analysis and design, 4th ED, New York:
doi:10.6342/NTU202100829
120
Wiley, 2016
[11] H.-T. Chou and Z.-D. Yan, Parallel-plate Luneburg lens antenna for broadband multibeam radiation at millimeter-wave frequencies with design optimization, IEEE Transactions on Antennas and Propagation, vol. 66, no. 11, pp. 5794-5804, 2018.
[12] Analog Device(2009), Op Amp Distortion: HD, THD, THD + N, IMD, SFDR, MTPR , Retrieved from https://www.analog.com/media/en/training-seminars/
tutorials/MT-053.pdf
[13] Ian Collins, Phase-Locked Loop (PLL) Fundamentals, Analog Dialogue, 2018 [14] APPLICATION NOTES: LAYOUT GUIDELINES FOR MMIC COMPONENTS,
Hittite Microwave Corporation, vol. 01
[15] Analog Device Support Community, FAQ on Hittite Microwave RF/MW Amplifiers from ADI, Retrieved from https://ez.analog.com/rf/w/documents/9631/
faq-on-hittite-microwave-rf-mw-amplifiers-from-adi
[16] Chirag Patel and Ramdas Chary, Soldering Considerations for Exposed-Pad Packages, Analog Device, 2012
[17] HMC625BLP5E Datasheet, 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL VARIABLE GAIN AMPLIFIER DC - 5 GHz, Analog Devices Inc.
[18] LTC5549 Datasheet, 2GHz to 14GHz Microwave Mixer with Integrated LO Frequency Doubler, Linear Technology Corporation
[19] HMC952ALP5GE Datasheet, GaAs pHEMT MMIC 2 Watt POWER AMPLIFIER WITH POWER DETECTOR 8 - 14 GHz, Analog Devices Inc.
[20] HMC564LC4 Datasheet, GaAs SMT pHEMT LOW NOISE AMPLIFIER 7 - 14 GHz, Analog Devices Inc.
[21] HMC326MS8G Datasheet, GaAs InGaP HBT MMIC DRIVER AMPLIFIER, 3.0 - 4.5 GHz, Analog Devices Inc.
doi:10.6342/NTU202100829
121
[22] 78J04T Datasheet, Thru-Hole DIP Switches, Grayhill Inc.
[23] Susan Riege, Via Stitching and Via Shielding, 2020, Retrieved from https://www.
altium.com/documentation/altium-designer/via-stitching-and-via-shielding-ad [24] ADRF5019 Datasheet, Silicon SPDT Switch Nonreflective 100 MHz to 13 GHz,
Analog Devices Inc.
[25] ADRF5040 Datasheet, High Isolation Silicon SP4T Nonreflective Switch 9 kHz to 12.0 GHz, Analog Devices Inc.
[26] ADF5356 Datasheet, Microwave Wideband Synthesizer with Integrated VCO, Analog Devices Inc.
[27] ADM7150 Datasheet, 800 mA Ultralow Noise, High PSRR, RF Linear Regulator, Analog Devices Inc.