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遥感技术与应用  2019, Vol. 34 Issue (6): 1221-1226    DOI: 10.11873/j.issn.1004-0323.2019.6.1221
定标专栏     
AgileDARN雷达内定标的方法与实现
邓翔1,2,3(),阎敬业3(),吴季3,蓝爱兰1,3
1.中国科学院国家空间科学中心 中国科学院微波遥感技术重点实验室,北京 100190
2.中国科学院大学, 北京 100049
3.中国科学院国家空间科学中心,北京 100190
A Method and Implementation of Internal Calibration in AgileDARN HF Radar
Xiang Deng1,2,3(),Jingye Yan3(),Ji Wu3,Ailan Lan1,3
1.Key Laboratory of Microwave Remote Sensing, Chinese Academy of Sciences, Beijing 100190, China
2.University of Chinese Academy of Sciences, Beijing 100049, China
3.National Space Science Center, Chinese Academy of Sciences, Beijing 100190, China
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摘要:

AgileDARN雷达系统是一种基于全数字相控阵技术的灵敏型地基相干高频雷达系统,实现对中高纬度电离层的探测。雷达系统的幅度和相位不一致将会导致雷达发射波束和接收波束的波束指向偏移,副瓣电平抬高和天线增益下降,最终影响雷达的探测精度。针对AgileDARN雷达系统幅度和相位不一致性展开研究,提出了一种基于FPGA和C++软硬件相结合的内定标方法。在发射探测信号之前,分别发送接收定标信号和发射定标信号,通过雷达系统的各个接收和发射通道后,计算各个通道之间的幅度和相位差异,用补偿因子来实现对雷达多通道幅度和相位不一致性的校正。实测数据表明:校正后各通道间幅度误差小于0.2 dB,相位误差小于1°。在满足系统一致性要求的前提下,既保证了实时性,又节省了雷达系统成本。

关键词: AgileDARNSuperDARN内定标幅相一致性相控阵    
Abstract:

The AgileDARN radar is an agile ground-based coherent high-frequency radar based on the all-digital phased array technology, enabling the detection of mid-high latitude ionosphere. The amplitude and phase imbalance among channels may lead to the beam pointing error, the elevation of the side lobe level and the decrease of the antenna gain, and ultimately affect the radar detection accuracy. Aiming at the imbalance in the AgileDARN radar, a real-time internal calibration method based on FPGA and C++ was proposed. Before observing ionosphere, receiver calibration and transmitter calibration are done first. During the calibration, the same calibration signal is sent to all transceivers. Then the variance of the outputs illustrates the imbalance among the transceivers and can be used to implement calibration. The measured data shows that the amplitude imbalance among channels after calibration is less than 0.2 dB, and the phase imbalance is less than 1°.On the premise of meeting the system consistency requirements, the method not only ensures real-time amplitude and phase calibration, but also saves radar system costs.

Key words: AgileDARN    SuperDARN    Internal Calibration    Amplitude and phase consistency    Phased Array
收稿日期: 2018-06-15 出版日期: 2020-03-23
ZTFLH:  TP79  
基金资助: 国家高技术研究发展计划项目“地基相干高频雷达阵关键技术”(2014AA123502);中国科学院前沿科学重点研究项目(QYZDY?SSW?JSC014)
通讯作者: 阎敬业     E-mail: NSSC_dengxiang@163.com;Yanjingye@nssc.ac.cn
作者简介: 邓 翔(1988-),男,湖北京山人,博士研究生,主要从事雷达信号处理方面的研究。E?mail:NSSC_dengxiang@163.com
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引用本文:

邓翔,阎敬业,吴季,蓝爱兰. AgileDARN雷达内定标的方法与实现[J]. 遥感技术与应用, 2019, 34(6): 1221-1226.

Xiang Deng,Jingye Yan,Ji Wu,Ailan Lan. A Method and Implementation of Internal Calibration in AgileDARN HF Radar. Remote Sensing Technology and Application, 2019, 34(6): 1221-1226.

链接本文:

http://www.rsta.ac.cn/CN/10.11873/j.issn.1004-0323.2019.6.1221        http://www.rsta.ac.cn/CN/Y2019/V34/I6/1221

图1  AgileDARN雷达系统框图
(a)  天线阵示意图
(b)  天线阵实物图
图3  定标链路示意框图
图4  软硬件相结合的定标原理示意图
图5  FPGA校正模块的内部结构
图6  校正算法流程图
图7  接收链路校正前后幅度和相位差异
图8  发射链路校正前后幅度和相位差异
图9  校正前后天线方向图对比
1 Chisham G, Lester M, Milan S E, et al. A Decade of the Super Dual Auroral Radar Network (SuperDARN): Scientific Achievements, New Techniques and Future Directions[J]. Surveys in Geophysics, 2007,28(1):33-109.
2 Yan Jingye, Lan Ailan. Project Report for AgileDARN Radar[R]. Beijing: National Space Science Center, 2015.
2 阎敬业,蓝爱兰.AgileDARN雷达的项目报告[R].北京:中国科学院国家空间科学中心,2015.
3 Geng Xintao. A Method on Amplitude and Phase Calibration for Phased Array Antennas Transmit System [J]. Radio Communications Technology, 2008(1):59-61.
3 耿新涛. 相控阵发射系统中幅相校准方法研究[J].无线电通信技术,2008(1):59-61.
4 Zhu Li, Gong Wenbin, Yang Genxing. A Correction System of DBF Antenna’s Receiver based on LMS and Its Realization [J]. Microcomputer Information, 2007,23(20):158-160.
4 朱丽, 龚文斌, 杨根庆. 多波束天线通道幅相一致性校正及实现[J]. 微计算机信息, 2007, 23(20):158-160.
5 Sun Yuzhu, Zhou Yong, Peng Lingxiang. Calibration of Amplitude and Phase Imbalances in Sum and Differences and Angle Error Digital Processing [J]. Modern Radar, 2002, 24(6):63-66, 71.
5 孙玉柱, 周勇, 彭灵翔. 和差幅相不平衡校正与角误差数字化处理[J].现代雷达,2002,24(6):63-65, 71.
6 Liang Yongsheng, Yang Haihua. Techniques for Controlling the Amplitude-phase Consistency of Multi-channel T /R Modules with Large Quantity[J]. Modern Radar, 2014,36(10):79-82.
6 梁永胜, 杨海华. 批量多通道T/R组件幅相一致性的控制技术[J].现代雷达,2014,36(10):79-82.
7 Yu Tao, Research on Amplitude-phase Consistency in T/R Modules [D].Chengdu: University of Electronic Science and Technology of China, 2008.
7 于涛. T/R组件幅相一致性研究[D].成都:电子科技大学, 2008.
8 Yaghjian A D. An Overview of Near-field Antenna Measurements [J]. IEEE Transactions on Antennas & Propagation, 1986, 34(1):30-45.
9 Mo Li. An Automated Test System of Multichannel DBF Receivers [J]. Radar & ECM, 2013,33(2):62-65.
9 莫骊. .一种多路DBF接收机的自动测试系统研究[J].雷达与对抗,2013,33(2):62-65.
10 Wang Yuyang. Research on Calibration Method for Receiving Channel in DBF [J]. Modern Electronics Technique, 2008(5):25-27.
10 王雨阳. 数字波束形成中的接收通道校正技术研究[J].现代电子技术,2008(5):25-27.
11 Tu Shuiping, Study of the Key Techniques of Amplitude-phase Consistency Test for DBF System [D].Beijing: Beijing Institute of Technology, 2016.
11 涂水平. DBF系统幅相一致性测试关键技术研究[D]. 北京:北京理工大学, 2016.
12 Nguyen H Q, Whittington J S, Devlin J C, et al. Accurate Phase Calibration for Digital Beam-Forming in Multi-Transceiver HF Radar System[J]. International Journal of Electronics & Telecommunications, 2013, 59(3):245-254.
13 Du Junjiao, Cao Xudong, Li Baosen, et al. Correction of Amplitude-Phase Imbalance based on FPGA for Multi-Channel Radar Receivers[J]. Electronics Optics & Control, 2011,18(1):85-89.
13 杜俊蛟, 曹旭东, 李宝森,等. 基于FPGA的多通道雷达接收机幅相不一致校正[J]. 电光与控制, 2011, 18(1):85-89.
14 Yin Jikai, Yu Baoguo, Xu Wenjuan. Research on Test and Calibration Technology of Digital Multi-Beam Antenna[J]. Radio Engineering, 2012,42(2):42-45.
14 尹继凯, 蔚保国, 徐文娟. 数字多波束天线的校准测试方法[J].无线电程,2012,42(2):42-45.
15 Zimmerman M L, Chicago I L. Single Piece Twin Folded Dipole Antenna[P]. Application Number: 10/175315, 11/18/2003.
16 Custovic E, Custovic E, Nguyen H O, et al. Evolution of the SuperDARN Antenna: Twin Terminated Folded Dipole Antenna for HF Systems[C]// 2011 6th International Conference on Broadband and Biomedical Communications (IB2Com), 2011: 24-29, doi: 10.1109/IB2Com. 2011.6217936.
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