A W Band Mini-SAR System for Unmanned Aerial Vehicle
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摘要: 随着轻小型无人机(UAV)日益发展,基于UAV平台搭载微型SAR系统的探测手段会给信息获取方式带来革命性的影响,这也对微型载荷提出了的更高的需求。针对这一需求,该文介绍了一种W波段UAV微型SAR系统,提出了基于锁相技术的线性调频源的设计方法,并对毫米波(MMW)介质集成波导天线、3维集成、运动补偿方法等关键问题进行研究,研制W波段无人机微型SAR系统原理样机,基于多旋翼无人机平台开展飞行成像应用试验。研究结果表明,原理样机在系统分辨率、体积、重量等方面具有处于业内领先水平,飞行试验获得了聚焦效果良好的高信噪比(SNR)图像。Abstract: With the development of light and small Unmanned Aerial Vehicles (UAV), the detection method of Mini SAR based on UAV platform brings a revolutionary impact on information acquisition mode. In this paper, a W-band Mini SAR system for UAV is proposed, including the system design proposal and composition, high linearity analog phase-locked frequency modulation, MilliMeter Wave (MMW) substrate integrated waveguide antenna, 3D integration and motion compensation methods to solve the key problems of Mini SAR. A W-band Mini SAR prototype is developed and the imaging test based on Multi-rotor UAV is proceeded. The results show that the resolution, volume and the weight of Mini SAR prototype is at the industry-leading level. A high SNR imaging with perfect focusing effect is obtained from flight test.
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Key words:
- Unmanned Aerial Vehicle(UAV) /
- Mini SAR /
- Frequency modulated source /
- 3D integration
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表 1 系统主要性能指标
参数名称 指标 载波频率(GHz) 95 带宽(GHz) 2000 调制方式 线性调频 调频率(MHz·μs) 20(可调) 分辨率(m) 0.075 最大作用距离(m) 500 -
ESSEN H, STANKO S, SOMMER R, et al. Millimetre wave SAR for UAV operation[C]. IEEE Asia-Pacific Microwave Conference, Melbourne, Australia, 2011: 963–966. JOHANNES W, ESSEN H, STANKO S, et al. Miniaturized high resolution Synthetic Aperture Radar at 94 GHz for microlite aircraft or UAV[C]. IEEE Sensors 2011, Limerick, Ireland, 2011: 2022–2025. LORT M, AGUASA A, LOPEZ-MARTINEZ C, et al. Initial evaluation of SAR Capabilities in UAV multicopter platforms[J]. IEEE Journal of Selected Topics in Applied Earth Observations & Remote Sensing, 2018, 11(1): 1–14. YAN Xiaoyu, CHEN Jie, LIYANAGE Biman, et al. A light-weight SAR system for multi-rotor UAV platform using LFM quasi-CW waveform[J]. IEEE International Geoscience and Remote Sensing Symposium, Beijing, CHINA, 2016: 7346–7349. 董勇伟, 李焱磊, 丁满来, 梁兴东. 一种高分辨率W波段SAR系统[J]. 电子与信息学报, 2018, 40(5): 1266–1270. doi: 10.11999/JEIT170461DONG Yongwei, LI Yanlei, DING Manlai, et al. High resolution W-band SAR[J]. Journal of Electronics &Information Technology, 2018, 40(5): 1266–1270. doi: 10.11999/JEIT170461 丁满来, 梁兴东, 唐跞, 等. 芯片化微型SAR系统方案设计与验证[J]. 电子与信息学报, 2018, 40(11): 2645–2650. doi: 10.11999/JEIT171203,2018DING Manlai, LIANG Xingdong, TANG Li, et al. Design and verification of monolithic integrated SAR system[J]. Journal of Electronics and Information Technology, 2018, 40(11): 2645–2650. doi: 10.11999/JEIT171203,2018 王喆垚. 三维集成技术[M]. 北京: 清华大学出版社, 2014: 2–6.WANG Zheyao. Three Dimensional Integration Technology[M]. Beijing: Tsinghua University Press, 2014: 2–6. BEST R E. Phase-Locked Loops Design, Simulation, and Applications[M]. Beijing: Tsinghua University Press, 2007: 25–27. WILTSE. J C. Surface-wave propagation on a single metal wire or rod at millimeter-wave and terahertz frequencies[C]. 2006 IEEE MTT-S International Microwave Symposium Digest, San Francisco, USA, 2006: 970–973. ALTAF A, ALSNUAIDI M A, and ARVAS E. A novel EBG structure to improve isolation in MIMO antenna[C]. 2017 USNC-URSI Radio Science Meeting(Joint with AP-S Symposium), San Diego, USA, 2017: 105–106. 赵正平. 微系统三维集成技术的新发展[J]. 微纳电子技术, 2017, 54(1): 1–10. doi: 10.13250/j.cnki.wndz.2017.01.001ZHANG Zhengping. New progress of the micro system three-dimension integration technology[J]. Micronanoelectronic Technology, 2017, 54(1): 1–10. doi: 10.13250/j.cnki.wndz.2017.01.001 肖庆. 微系统三维异质异构集成与应用[C]. 2018年全国微波毫米波会议, 成都, 中国, 2018: 417–420.XIAO Qing. Integration and application of 3D heterogeneous heterogeneity in microsystems[C]. 2018 National Conference on Microwave and Millimeter Waves, Chengdu, China, 2018: 417–420. 王岩飞, 刘畅, 詹学丽, 等. 无人机载合成孔径雷达系统技术与应用[J]. 雷达学报, 2016, 5(4): 333–349. doi: 10.12000/JR16089WANG Yanfei, LIU Chang, and ZHAN Xueli, et al. Technology and applications of UAV synthetic aperture radar system[J]. Journal of Radars, 2016, 5(4): 333–349. doi: 10.12000/JR16089 ZAUGG E, EDWARDS M, LONG D, et al. Developments in compact high-performance synthetic aperture radar systems for use on small Unmanned Aircraft[C]. Aerospace Conference, Montana, USA, 2011: 1–14. VAN DER Graaf M W, OTTEN M P G, HUIZING A G, et al. AMBER: An X-band FMCW digital beam forming synthetic aperture radar for a tactical UAV[C]. IEEE International Symposium on Phased Array Systems and Technology, Waltham, USA, 2013: 165–170. EDRICH M and WEISS G. Second-generation Ka-band UAV SAR system[C]. European Radar Conference, Amsterdam, Holland, 2008, 479–482.