调频连续波技术在气象雷达中的应用  

Application of frequency modulated continuous wave in weather radar

作　　者：吴俊[1] Wu Jun(Anhui Suncreate Electronics Co.,Ltd.,Hefei 230031)

机构地区：[1]安徽四创电子股份有限公司,合肥230031

出　　处：《气象水文海洋仪器》2020年第3期64-68,共5页Meteorological,Hydrological and Marine Instruments

摘　　要：文章提出了将调频连续波技术应用在气象探测雷达中以获得高探测性能和设备的高可靠性。首先介绍了系统的工作原理,采用收发分离的双天线同时收发连续波信号,对回波I/Q数据进行二维FFT处理并采用谱积累的方式提高系统的探测灵敏度,并且采用距离、强度和多普勒特性定标提高系统测量准确度。然后将研制雷达与传统雷达探测性能进行对比,结果表明连续波气象雷达的探测精细化程度相比脉冲雷达有较大的飞越,有效地弥补了传统探空设备的低时空密度的不足。This paper proposes the application of frequency modulated continuous wave technology in weather detection radar to obtain high detection performance and high reliability of equipment.Firstly,the operating principle of the system is introduced.The system adopts dual antennas with separate transmitter and receiver simultaneously transmitting and receiving electromagnetic wave.Two-dimensional FFT is performed to process I/Q data and the spectrum are accumulated to achieve a better detection sensitivity.The distance,intensity and Doppler calibrations are applied to improve the precision and accuracy.Then,the detection performance of the developed radar is compared with that of the traditional radar,and the results show that the detection refinement of FMCW meteorological radar is larger than that of pulse radar,which effectively compensates for the low space-time density of traditional sounding radar.

关 键 词：调频连续波 二维FFT 自动标校 气象雷达 

分 类 号：TN959.4[电子电信—信号与信息处理]